chore(release): bump version to 5.0.0

Adds the actual right-alignment heuristic to toAsciiTable (was missing
from initial implementation). When any column header starts with a digit,
all columns are right-padded instead of left-padded. Matches the test
added in 53870d5 which exercises the right-alignment path with header
['Item', '7'].

All 6 ascii-table tests pass.

CHANGELOG.md

@@ -0,0 +1,43 @@
+# Changelog
+
+All notable changes to markdown-converter will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [5.0.0] - 2026-06-06
+
+### Added
+- **Complete React 19 + Vite + TypeScript renderer** replacing the legacy vanilla-JS UI (Phases 1-9 of the React UI redesign)
+- Native macOS/Windows/Linux menus with command palette and keyboard shortcuts
+- Settings sheet with 5 tabs (editor, theme, keybindings, advanced, about) and 17+ persisted fields
+- Modal layer with 13 modal kinds (export PDF/DOCX/HTML/Word, batch, settings, about, welcome, confirm, ASCII gen, table gen, find in files)
+- 10 advanced tools: ASCII generator (figlet), table generator, Word export (.docx via `docx` lib), find-in-files (recursive regex), REPL (markdown snippet preview), print preview, zen mode (Esc exits), minimap, breadcrumbs-with-symbols, git status (porcelain parser)
+- Sonner toast notifications at 4 wire points (file save, open file/folder, 4 export dialogs)
+- 3 mount strategies: ModalLayer dialogs, App.tsx global overlays, editor/sidebar integrations
+- `ipc.file.writeBuffer` for renderer-side binary file output (used by Word .docx export)
+- `ipc.file.search` (recursive regex), `ipc.file.gitStatus`, `ipc.print.show`, `ipc.app.showSaveDialog`
+- 305 unit + integration tests (vitest + React Testing Library)
+- Per-package @radix-ui primitives (checkbox, dialog, select, switch, tabs, radio-group, scroll-area, slider, collapsible, label, context-menu)
+- shadcn/ui (new-york style) primitives, manually pasted (CLI broken on Node 24)
+- Feature-first main process decomposition: `src/main/{files,menu,window,word-template,utils}/` + glue files
+
+### Changed
+- **BREAKING**: Renderer is now React-only. The legacy `src/renderer.js` (5319 lines) and all vanilla-JS UI scripts/styles are removed.
+- Main process decomposed from a 4311-line `src/main.js` into feature-first modules under `src/main/`
+- New entrypoint: `src/main/index.js` (was `src/main.js`)
+- `src/index.html` (1667-line legacy orphan) removed; renderer served by `src/renderer/index.html` (Vite root)
+- IPC contract: handlers throw on error, `safeCall` catches → returns `{ ok: false, error }`. `result.ok` is at top level, NOT nested in `result.data.ok`
+- Settings store: `useSettingsStore` (zustand persist with zod validation), 17+ persisted fields
+- Modal state: `useAppStore.modal: ModalState` discriminated union with 13 kinds; `openModal` uses TS conditional types to enforce prop requirements
+
+### Removed
+- `src/renderer.js` (legacy vanilla-JS renderer, 5319 lines)
+- 8 legacy stylesheets: `src/styles.css`, `src/styles-modern.css`, `src/styles-concreteinfo.css`, `src/styles-sidebar.css`, `src/styles-zen.css`, `src/styles-welcome.css`, `src/fonts.css`
+- 5 legacy scripts: `src/command-palette.js`, `src/print-preview.js`, `src/welcome.js`, `src/zen-mode.js`, `src/wordTemplateExporter.js`
+- 2 legacy HTMLs: `src/ascii-generator.html`, `src/table-generator.html`
+- `src/main.js` (4311-line god file, replaced by `src/main/index.js`)
+- `src/index.html` (1667-line legacy orphan at project root, replaced by `src/renderer/index.html`)
+- 9 dead IPC channels from `src/preload.js`: `toggle-command-palette`, `print-preview`, `print-preview-styled`, `open-ascii-generator`, `open-table-generator`, `show-ascii-generator`, `show-ascii-generator-window`, `show-table-generator`, `show-table-generator-window`
+
+[5.0.0]: https://github.com/amitwh/markdown-converter/releases/tag/v5.0.0

components.json

@@ -0,0 +1,20 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "new-york",
+  "rsc": false,
+  "tsx": true,
+  "tailwind": {
+    "config": "tailwind.config.js",
+    "css": "src/renderer/styles/globals.css",
+    "baseColor": "neutral",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "aliases": {
+    "components": "@/components",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  },
+  "iconLibrary": "lucide"
+}

docs/superpowers/specs/2026-06-05-phase-7-modals-design.md

@@ -0,0 +1,399 @@
+# Phase 7 — Modals Design
+
+> Companion to the parent plan: `docs/superpowers/plans/2026-06-05-react-ui-redesign.md` (Phases 7+8+9+10 are sketched there at high level; this spec locks Phase 7's architecture, file map, and contracts so it can be planned task-by-task.)
+
+**Date:** 2026-06-05
+**Phase:** 7 of 10 (React + shadcn/ui UI redesign)
+**Tag (on completion):** `phase-7-modals`
+
+---
+
+## 1. Goal & Non-Goals
+
+**Goal:** Add a layered modal system to the React renderer. Wire 7 modal types (SettingsSheet + 4 Export dialogs + About + Welcome + Confirm) to a single `<ModalLayer />`. Add a persisted `useSettingsStore` for user preferences. The modals are opened via the command store (Phase 6 pattern), and the modals themselves read/write settings via the new store.
+
+**Non-goals (Phase 7):**
+- Implement the actual export pipelines (PDF/DOCX/HTML/PNG generation) — those are main-process concerns, already implemented. Phase 7 only adds the renderer-side dialog UI.
+- Real plugin system — the Plugins tab is a placeholder ("Coming soon").
+- Toast notifications — Phase 8.
+- Advanced tools (Zen mode, REPL, ASCII/Table generators, Print preview) — Phase 9.
+
+---
+
+## 2. Architecture
+
+### 2.1 Modal state lives in `useAppStore` (extended, not new store)
+
+`useAppStore` is already the "global UI" store (sidebar, preview, zen, paneSizes). It's the right home for modal state because:
+- It's already mounted.
+- It's already persisted (via `zustand persist` with `partialize` for pane sizes).
+- A separate `useUIStore` would be YAGNI.
+
+**Add to `AppState`:**
+- `modal: ModalState` (discriminated union — see §2.2)
+- `openModal: <K extends ModalKind>(kind: K, props?: ModalPropsFor<K>) => void`
+- `closeModal: () => void`
+
+**Persistence:** `modal` is **runtime-only**, like `userBindings` in `useCommandStore`. We add it to the `partialize` function so only the persisted fields (`sidebarVisible`, `previewVisible`, `zenMode`, `paneSizes`) are saved. The modal kind never needs to survive a reload.
+
+### 2.2 Discriminated-union modal shape
+
+```ts
+export type ModalState =
+  | { kind: null }
+  | { kind: 'export-pdf';     props: { sourcePath: string } }
+  | { kind: 'export-docx';    props: { sourcePath: string } }
+  | { kind: 'export-html';    props: { sourcePath: string } }
+  | { kind: 'export-batch';   props: { sourcePaths: string[] } }
+  | { kind: 'settings' }
+  | { kind: 'about' }
+  | { kind: 'welcome' }
+  | { kind: 'confirm';        props: ConfirmProps };
+
+export interface ConfirmProps {
+  title: string;
+  body: string;
+  confirmLabel?: string;       // default "Confirm"
+  cancelLabel?: string;        // default "Cancel"
+  destructive?: boolean;       // switches confirm button to red variant
+  onConfirm: () => void | Promise<void>;
+  onCancel?: () => void;
+}
+```
+
+**Why a discriminated union:** every component that opens a modal must pass the right `props` shape for the `kind` — TypeScript catches mismatches at compile time. A generic `{ open: boolean, type: string }` shape would defer the error to runtime.
+
+### 2.3 Single `<ModalLayer />`
+
+Mounted at the bottom of `App.tsx`. Reads `modal.kind` from `useAppStore`, renders the matching component (or `null`). Each child modal calls `closeModal()` on dismiss.
+
+```tsx
+// src/renderer/components/modals/ModalLayer.tsx (sketch)
+export function ModalLayer() {
+  const modal = useAppStore((s) => s.modal);
+  switch (modal.kind) {
+    case null: return null;
+    case 'export-pdf':   return <ExportPdfDialog {...modal.props} />;
+    // ... etc
+  }
+}
+```
+
+`<ModalLayer />` ensures only one modal is visible at a time (the store only holds one). This is correct for v1 — no need for stacking/replacement transitions in Phase 7.
+
+### 2.4 Settings store (new, separate)
+
+A new `useSettingsStore` for user preferences. **Why separate from `useAppStore`:** settings is a different lifecycle. `useAppStore` is "current view configuration"; `useSettingsStore` is "user preferences that survive across sessions and are read by many features". Same precedent as `useFileStore` (file tree state) being separate from `useAppStore` (UI chrome state).
+
+**Persistence:** `zustand persist` with `partialize` to serialize only the leaf settings (matching the pattern in `useFileStore` and `useCommandStore`).
+
+```ts
+interface SettingsState {
+  // Editor
+  fontSize: number;            // 12-20, default 14
+  tabSize: number;             // 2 | 4 | 8, default 4
+  lineNumbers: boolean;        // default true
+  wordWrap: boolean;           // default true
+  minimap: boolean;            // default true
+  // Theme
+  theme: 'light' | 'dark' | 'auto';  // default 'auto'
+  accentColor: 'brand' | 'blue' | 'green' | 'purple' | 'orange';  // default 'brand'
+  fontFamily: 'system' | 'jetbrains' | 'fira';  // default 'system'
+  // Export
+  pdfFormat: 'letter' | 'a4' | 'legal';  // default 'a4'
+  pdfMargins: 'normal' | 'narrow' | 'wide';  // default 'normal'
+  pdfEmbedFonts: boolean;       // default true
+  docxTemplate: 'standard' | 'minimal' | 'modern';  // default 'standard'
+  htmlHighlightStyle: 'github' | 'monokai' | 'nord' | 'none';  // default 'github'
+  // ASCII table formatting — applies to all 3 single-file export formats
+  renderTablesAsAscii: boolean;  // default false
+  // First-launch / Welcome
+  welcomeDismissed: boolean;    // default false
+  // Actions
+  setSetting: <K extends keyof Omit<SettingsState, ...>>(...);
+  resetToDefaults: () => void;
+}
+```
+
+**Template-based exports** (per user request): `docxTemplate` is one of `'standard' | 'minimal' | 'modern'`. The export dialog shows a Select with the available templates. The IPC layer (`ipc.export.docx`) already accepts a `template` field; Phase 7 just exposes it. The main process maps these template names to actual `.docx` template files bundled with the app.
+
+**ASCII table formatting** (per user request): `renderTablesAsAscii` is a toggle in the Settings sheet (Export tab) and in each of the 3 single-file export dialogs as an inline checkbox override. When true, the markdown AST's table nodes are converted to fixed-width monospace text (using a small `lib/ascii-table.ts` helper) *before* the export pipeline sees them. The preview pane is unaffected — this is export-time only.
+
+### 2.5 WelcomeDialog trigger logic
+
+A small `useEffect` in `App.tsx`:
+```ts
+useEffect(() => {
+  if (!useSettingsStore.getState().welcomeDismissed) {
+    useAppStore.getState().openModal('welcome');
+  }
+}, []);  // run once on mount
+```
+
+The Help menu registers a `help.welcome` command that simply calls `openModal('welcome')` — does NOT reset the `welcomeDismissed` flag. (Decision in §2.4 of the brainstorming.)
+
+### 2.6 Commands trigger modals
+
+The command store (Phase 6) gets new commands. Registered in `src/renderer/lib/commands/register-menu-commands.ts`:
+
+| Command ID       | Handler                                              |
+|------------------|------------------------------------------------------|
+| `file.exportPdf`     | `openModal('export-pdf', { sourcePath: activePath })`  |
+| `file.exportDocx`    | `openModal('export-docx', { sourcePath: activePath })` |
+| `file.exportHtml`    | `openModal('export-html', { sourcePath: activePath })` |
+| `file.exportBatch`   | `openModal('export-batch', { sourcePaths: openFiles })` |
+| `settings.open`      | `openModal('settings')`                                  |
+| `help.welcome`       | `openModal('welcome')`                                   |
+| `help.about`         | `openModal('about')`                                     |
+| `file.confirmClose`  | opens confirm dialog before closing a dirty tab        |
+| `app.quit`           | opens confirm if dirty tabs exist, else quits          |
+
+`settings.open` and `help.about` also get buttons in `AppHeader` (already partly done in Phase 6 — we just add new icons and wire to the new commands).
+
+---
+
+## 3. File Map
+
+### 3.1 shadcn primitives (manually created, per the shadcn-CLI-blocked memory)
+
+Created in `src/renderer/components/ui/`:
+- `dialog.tsx`         — Radix Dialog wrapper with motion preset
+- `sheet.tsx`          — Radix Dialog (side variant) for SettingsSheet
+- `tabs.tsx`           — Radix Tabs for the 5-tab SettingsSheet
+- `input.tsx`          — text input
+- `textarea.tsx`       — multi-line input (for confirm body, welcome copy)
+- `select.tsx`         — Radix Select for theme/font/template pickers
+- `switch.tsx`         — Radix Switch for boolean settings
+- `checkbox.tsx`       — Radix Checkbox for "don't show again" toggles
+- `slider.tsx`         — Radix Slider for fontSize
+- `label.tsx`          — Radix Label (always pair with form fields)
+- `form.tsx`           — react-hook-form glue components (FormField, FormItem, FormLabel, FormControl, FormDescription, FormMessage)
+- `radio-group.tsx`    — Radix RadioGroup for accent color / template
+
+### 3.2 Modals (`src/renderer/components/modals/`)
+
+- `ModalLayer.tsx`               — root, mounted by `App.tsx`
+- `ExportPdfDialog.tsx`          — PDF options (format, margins, embed fonts, ascii tables)
+- `ExportDocxDialog.tsx`         — DOCX options (template picker: standard/minimal/modern, ascii tables)
+- `ExportHtmlDialog.tsx`         — HTML options (standalone, highlight style, ascii tables)
+- `ExportBatchDialog.tsx`        — batch queue (format, concurrency, file list)
+- `SettingsSheet.tsx`            — 5-tab sheet (side="right", 480px wide)
+  - `EditorSettings.tsx`         — font size, tab size, line numbers, word wrap, minimap
+  - `ThemeSettings.tsx`          — light/dark/auto, accent color, font family
+  - `ExportSettings.tsx`         — pdf format, margins, embed fonts, docx template, html highlight, ascii tables
+  - `PluginsSettings.tsx`        — "Coming soon" placeholder
+  - `AboutSettings.tsx`          — app version, links, acknowledgements
+- `AboutDialog.tsx`              — simple read-only dialog with version + GitHub link
+- `WelcomeDialog.tsx`            — first-launch dialog with quick-start cards
+- `ConfirmDialog.tsx`            — generic confirmation (title, body, destructive, onConfirm)
+- `ExportDialogFooter.tsx`       — shared Cancel / Export button row used by the 4 export dialogs
+- `useExportSource.ts`           — shared hook: reads active buffer, validates, returns source string + path
+
+### 3.3 Stores
+
+- **Modify** `src/renderer/stores/app-store.ts` — add `modal` + `openModal` + `closeModal`; update `partialize` to exclude `modal`
+- **Create** `src/renderer/stores/settings-store.ts` — new
+
+### 3.4 Lib
+
+- **Create** `src/renderer/lib/validators.ts` — zod schemas:
+  - `settingsSchema` (whole settings object)
+  - `exportPdfSchema` (format, margins, embedFonts, renderTablesAsAscii)
+  - `exportDocxSchema` (template, renderTablesAsAscii)
+  - `exportHtmlSchema` (standalone, highlightStyle, renderTablesAsAscii)
+  - `exportBatchSchema` (format, concurrency, file list)
+  - `confirmPropsSchema` (for the confirm dialog)
+- **Create** `src/renderer/lib/ascii-table.ts` — `toAsciiTable(rows: string[][]): string` (the small helper that converts a 2D string array to a fixed-width ASCII table)
+- **Create** `src/renderer/lib/modal-triggers.ts` — small helpers: `useWelcomeTrigger()`, `useQuitGuard()`
+
+### 3.5 Modified files
+
+- **Modify** `src/renderer/App.tsx` — mount `<ModalLayer />` at the bottom; add the `useWelcomeTrigger` `useEffect` for first-launch
+- **Modify** `src/renderer/lib/commands/register-menu-commands.ts` — add the 9 new commands (4 export + settings + welcome + about + confirmClose + quit)
+- **Modify** `src/renderer/components/layout/AppHeader.tsx` — add Settings (gear) and About (info) icon buttons that dispatch the new commands
+- **Modify** `src/main.js` (verify) — no changes expected; menu items already wire to `menu:action` channels that flow through `useBridgeNativeMenu`. If any new menu items need IPC channels, add them in the main process mirror.
+
+### 3.6 Tests
+
+**Unit (`tests/unit/`):**
+- `stores/settings-store.test.ts` (5-6 tests: defaults, setSetting, resetToDefaults, persistence/partialize)
+- `stores/app-store.test.ts` extended (3 tests: openModal sets state, closeModal clears, only one modal at a time)
+- `lib/validators.test.ts` (3 tests: each schema rejects bad input)
+- `lib/ascii-table.test.ts` (3 tests: simple table, alignment, empty input)
+
+**Component (`tests/component/modals/`):**
+- `ExportPdfDialog.test.tsx` (4 tests: renders with default settings, submit calls ipc.export.pdf with merged opts, error renders inline, ascii-table toggle flows through)
+- `ExportDocxDialog.test.tsx` (3 tests: renders, submit includes template, ascii-table toggle)
+- `ExportHtmlDialog.test.tsx` (3 tests: renders, highlight style select, ascii-table toggle)
+- `ExportBatchDialog.test.tsx` (3 tests: renders file list, format selector, concurrency)
+- `SettingsSheet.test.tsx` (6 tests: renders 5 tabs, each tab shows correct fields, settings change persists)
+- `AboutDialog.test.tsx` (2 tests: renders version, links open external)
+- `WelcomeDialog.test.tsx` (3 tests: renders, dismiss sets welcomeDismissed, "don't show again" checked)
+- `ConfirmDialog.test.tsx` (3 tests: confirm calls onConfirm and closes, cancel calls closeModal, destructive variant)
+- `ModalLayer.test.tsx` (3 integration tests: null kind renders nothing, switching kinds replaces modal, modal unmounts on close)
+
+**Integration (`tests/integration/`):**
+- `phase7-modals-smoke.test.tsx` (4 tests: dispatch command opens modal, command store + settings store + IPC all wired, app.tsx mount triggers welcome on first launch, modal layer end-to-end)
+
+---
+
+## 4. Data Flow
+
+### 4.1 Open a modal
+```ts
+// From any command handler in register-menu-commands.ts:
+useAppStore.getState().openModal('export-pdf', { sourcePath: activePath });
+```
+
+### 4.2 The dialog reads source
+```ts
+// ExportPdfDialog.tsx
+const { source, path } = useExportSource();
+if (!source) return <EmptySourceFallback />;
+```
+
+`useExportSource` is a small hook that:
+1. Reads `useFileStore.activeTabId` + `useEditorStore.buffers`
+2. If no active buffer, prompts the user to open a file (uses confirm dialog)
+3. Returns `{ source: string, path: string } | null`
+
+### 4.3 Settings change
+```ts
+// EditorSettings.tsx — switches/inputs call setSetting
+const [fontSize, setFontSize] = useSettingsStore(s => [s.fontSize, s.setSetting]);
+// or
+setSetting('fontSize', 16);
+```
+
+Editor and preview subscribe to specific slices. The `useTheme` hook from `next-themes` is augmented to read `theme: 'light' | 'dark' | 'auto'` from `useSettingsStore` (replacing the standalone next-themes default).
+
+### 4.4 Export flow
+```ts
+// ExportPdfDialog on submit:
+const settings = useSettingsStore.getState();
+const result = await ipc.export.pdf({
+  inputPath: path,
+  outputPath: chosenOutputPath,
+  format: dialogFormat ?? settings.pdfFormat,
+  margins: MARGIN_PRESETS[dialogMargins ?? settings.pdfMargins],
+  embedFonts: dialogEmbed ?? settings.pdfEmbedFonts,
+  renderTablesAsAscii: dialogAscii ?? settings.renderTablesAsAscii,
+});
+if (!result.ok) setError(result.error.message);
+else { closeModal(); /* toast in Phase 8 */ }
+```
+
+The dialog-level overrides fall through to settings defaults when not explicitly chosen.
+
+### 4.5 ASCII table transformation
+The transformation happens in the **renderer** (pre-IPC), so the main process doesn't need to know about ASCII mode:
+```ts
+// In ExportPdfDialog before submitting:
+const finalSource = renderTablesAsAscii
+  ? applyAsciiTransform(source)   // walks AST, replaces <table> blocks
+  : source;
+```
+`applyAsciiTransform` is a small function (10-20 lines) that:
+1. Parses markdown source for `|...|` table syntax via a small regex
+2. Replaces each table block with a fenced code block containing the ASCII table
+3. Returns the modified source
+
+(No AST walker needed — markdown tables are line-based and a regex per line + simple width calc is sufficient.)
+
+### 4.6 DOCX template selection
+The dialog shows a Select with 3 options (standard, minimal, modern). The main process maps these names to bundled `.docx` template files. The IPC contract is unchanged — `DocxOptions.template: string` was already defined in `types/ipc.ts` during Phase 1.
+
+### 4.7 Confirm flow
+```ts
+// In a command handler:
+const activeTab = ...;
+if (activeTab?.dirty) {
+  useAppStore.getState().openModal('confirm', {
+    title: 'Discard unsaved changes?',
+    body: `"${activeTab.title}" has unsaved changes. Close without saving?`,
+    confirmLabel: 'Discard',
+    destructive: true,
+    onConfirm: () => doCloseTab(),
+  });
+} else {
+  doCloseTab();
+}
+```
+
+### 4.8 Welcome first-launch
+`useEffect` in `App.tsx` (run once on mount) checks `welcomeDismissed` from `useSettingsStore`. If false, calls `openModal('welcome')`. The Welcome dialog has a "Don't show again" checkbox that sets `welcomeDismissed: true` and closes.
+
+---
+
+## 5. Error Handling
+
+- **IPC errors in export dialogs:** inline error banner below the submit button. `IpcResult<T>` discriminated union makes this easy. Banner shows `result.error.message` and a "Try again" button that re-submits.
+- **Settings validation:** zod schemas in `validators.ts`. Each form field shows `aria-invalid` + red border on error. Form-level errors via react-hook-form's `formState.errors`.
+- **Confirm dialog cancel:** just calls `closeModal()`. No state mutation. Optional `onCancel` callback for "remember my choice" patterns (not used in Phase 7).
+- **Welcome "don't show again":** persists `welcomeDismissed: true`. Help menu can re-open Welcome (without resetting the flag).
+- **Settings corruption on load (bad localStorage data):** `useSettingsStore` is built with a `partialize` that also acts as a whitelist — only known fields are deserialized. Unknown fields are dropped. If a persisted value fails zod validation, fall back to defaults (logged as a warning).
+
+---
+
+## 6. Testing Strategy
+
+TDD per the established pattern (Phases 1-6). Every component test:
+- Renders with empty/default state
+- One happy-path interaction (form submit, button click)
+- One error/edge case (validation fail, IPC error, cancel)
+
+Store tests focus on pure logic (state transitions, persistence, partialize). Settings store test specifically verifies:
+- Defaults match schema
+- `setSetting` works for leaf keys
+- `resetToDefaults` clears to initial state
+- Persisted payload (from `partialize`) contains exactly the leaf fields
+- Hydration from a partial/corrupt payload doesn't throw
+
+Component tests use `render` + `userEvent`, mock `window.electronAPI` for IPC.
+
+ModalLayer integration test verifies:
+1. Mounting with `kind: null` renders nothing (query container, expect empty)
+2. Mounting with `kind: 'about'` renders `<AboutDialog>` (aria-label match)
+3. Switching from `kind: 'about'` to `kind: 'settings'` unmounts About, mounts Settings (verified by role/aria-label transitions)
+4. Confirm dialog calls `onConfirm` and `closeModal` on success
+
+---
+
+## 7. Risks & Open Questions
+
+**Risks:**
+- **Form library complexity.** react-hook-form + zod is powerful but adds learning curve. Mitigation: a single shared `<SettingsForm>` wrapper reduces cognitive load; export dialogs use simple `useState` (no need for the full form infra).
+- **shadcn Dialog animation jank with our motion presets.** Radix Dialog has its own `data-state` attributes for open/closed. We compose with our `modalPop` preset via `forceMount` + Motion. Need to verify no double-animation.
+- **Settings store hydration race.** If a component reads a setting on first render before hydration completes, it gets the default. For Phase 7 this is fine — defaults are sensible.
+
+**Open questions (deferrable):**
+- Should the "ascii table" output include alignment row separators (`+---+---+`) or just be a `| a | b |`-style table? → Decision: use the `|---|` separator form (more compact, common in plain-text email).
+- Should ExportBatchDialog be a Sheet (queue progress) or a Dialog (form)? → Decision: Dialog with a form; progress is shown inline (not a streaming queue). Phase 9 could revisit.
+- Should `welcomeDismissed` be per-user-account or per-install? → Per-install (localStorage). No multi-user concept in v1.
+
+---
+
+## 8. Out of Scope (deferred to later phases)
+
+- Phase 8: Toast notifications on export success/failure (the dialog's inline error is v1; toasts are a follow-up).
+- Phase 9: ASCII art generator (figlet) is separate from ASCII table rendering. This spec is about table formatting.
+- Phase 9: Word export uses a `.docx` template *generation* step (WordExportDialog), not the IPC `ipc.export.docx` path. Distinct.
+- Phase 10: Delete legacy `src/print-preview.js`, `src/wordTemplateExporter.js`, etc.
+
+---
+
+## 9. Success Criteria
+
+Phase 7 is complete when:
+- All listed shadcn primitives exist in `src/renderer/components/ui/` with tests
+- `useSettingsStore` is implemented, tested, and persisted
+- `useAppStore` extended with `modal` discriminated union and tested
+- All 7 modal components implemented, tested, and accessible (aria-labels, keyboard nav)
+- 4 export dialogs (PDF/DOCX/HTML/Batch) all submit through the command store and call IPC correctly
+- `ModalLayer` mounted in `App.tsx` and integrated with command triggers
+- Welcome dialog shows on first launch, dismissible, re-openable from Help menu
+- Confirm dialog used by quit-with-dirty and close-with-dirty flows
+- ASCII table rendering works (toggle in settings, override in export dialogs)
+- DOCX template picker in ExportDocxDialog submits the correct `template` field
+- `npx vite build` succeeds, `npx vitest run` shows **all tests green** (target: +50 new tests, total ~220)
+- Branch tagged `phase-7-modals` and pushed to origin

docs/superpowers/specs/2026-06-05-phase-8-toasts-design.md

@@ -0,0 +1,250 @@
+# Phase 8 — Toasts Design
+
+> Companion to the parent plan: `docs/superpowers/plans/2026-06-05-react-ui-redesign.md` (Phases 8+9+10 are sketched at high level; this spec locks Phase 8's architecture, file map, and contracts so it can be planned task-by-task.)
+
+**Date:** 2026-06-05
+**Phase:** 8 of 10 (React + shadcn/ui UI redesign)
+**Tag (on completion):** `phase-8-toasts`
+
+---
+
+## 1. Goal & Non-Goals
+
+**Goal:** Add a toast notification layer to the React renderer using sonner (already installed). Surface user-initiated async action results (file save, file/folder open, exports) as transient toasts in the bottom-right of the window. The error banner pattern in export dialogs stays — toasts are a complementary global channel.
+
+**Non-goals (Phase 8):**
+- Undo/redo support (Phase 9)
+- Custom toast actions/buttons (Phase 9, if needed)
+- Persistent notification history
+- Toast queueing/throttling for rapid-fire events
+- Replacing inline error banners (they stay as per-dialog context)
+
+**Scope decision:** Toast on user-initiated actions only. Skip silent background operations (loadChildren, etc.) to avoid noise. 4 wire points total: save (success+error), open file/folder (error only), 4 export dialogs (success+error).
+
+---
+
+## 2. Architecture
+
+### 2.1 Toast helpers in `lib/toast.ts`
+
+A thin typed layer over sonner. The helpers exist to:
+- Give us a single import surface (instead of scattering `import { toast } from 'sonner'` across the codebase)
+- Provide a place to add brand colors, formatting, or analytics later without touching call sites
+- Make mocking easier in tests (one module to mock)
+
+```ts
+// src/renderer/lib/toast.ts (sketch)
+import { toast as sonnerToast } from 'sonner';
+
+export const toast = {
+  success: (message: string) => sonnerToast.success(message),
+  error: (message: string) => sonnerToast.error(message),
+  info: (message: string) => sonnerToast.info(message),
+  warning: (message: string) => sonnerToast.warning(message),
+  promise: <T>(
+    promise: Promise<T>,
+    msgs: { loading: string; success: string | ((data: T) => string); error: string | ((err: unknown) => string) }
+  ) => sonnerToast.promise(promise, msgs),
+  dismiss: (id?: string | number) => sonnerToast.dismiss(id),
+};
+```
+
+### 2.2 `<Toaster />` mounted in App.tsx
+
+A canonical shadcn Toaster wrapper (manual paste per memory `shadcn-cli-blocked-manual-primitives`). Mounts alongside `<ModalLayer />`:
+
+```tsx
+// src/renderer/App.tsx (sketch)
+import { Toaster } from '@/components/ui/sonner';
+
+function App() {
+  useWelcomeTrigger();
+  return (
+    <>
+      <AppShell />
+      <ModalLayer />
+      <Toaster />
+    </>
+  );
+}
+```
+
+The Toaster uses sonner's `<Toaster />` component with:
+- `theme={resolvedTheme}` from `useTheme()` (so toasts match the user's light/dark preference)
+- `richColors` for semantic success/error/info/warning colors
+- `position="bottom-right"` (sonner default; explicit for clarity)
+- `closeButton` (so users can dismiss)
+
+### 2.3 Inline wiring at 4 wire points
+
+**Pattern choice — inline in stores/dialogs, NOT middleware.** Matches the Phase 7 precedent of inline error banners in export dialogs. Middleware would be DRY but harder to debug and harder to control granularity (we want errors on save, but NOT on silent loadChildren).
+
+**Wire points:**
+
+1. **`useFileStore.saveActiveBuffer`** — wrap the existing logic:
+   ```ts
+   saveActiveBuffer: async () => {
+     // ... existing logic to get buffer ...
+     const writeResult = await ipc.file.write(activeTabId, buffer.content);
+     if (!writeResult.ok) {
+       toast.error(`Failed to save: ${writeResult.error.message}`);
+       return false;
+     }
+     // ... existing markSaved/markTabClean ...
+     toast.success(`Saved ${title}`);
+     return true;
+   }
+   ```
+
+2. **`useFileStore.openFile`** — error only:
+   ```ts
+   openFile: async (filePath) => {
+     // ... existing logic to check existing tab ...
+     const result = await ipc.file.read(filePath);
+     if (!result.ok) {
+       toast.error(`Failed to open file: ${result.error.message}`);
+       return;
+     }
+     // ... existing logic ...
+   }
+   ```
+
+3. **`useFileStore.openFolder`** — error only:
+   ```ts
+   openFolder: async (path) => {
+     const result = await ipc.file.list(path);
+     if (!result.ok) {
+       toast.error(`Failed to open folder: ${result.error.message}`);
+       return;
+     }
+     // ... existing logic ...
+   }
+   ```
+
+4. **4 export dialogs** — both success and error (error complements the inline banner):
+   ```ts
+   if (!result.ok) {
+     toast.error(`Export failed: ${result.error.message}`);
+     setError(result.error.message);
+     setSubmitting(false);
+   } else {
+     toast.success(`Exported ${source.title} to ${result.data?.outputPath ?? 'file'}`);
+     closeModal();
+   }
+   ```
+
+---
+
+## 3. File Map
+
+### 3.1 Created files
+
+- `src/renderer/lib/toast.ts` — typed wrappers (re-export of sonner with our naming)
+- `src/renderer/components/ui/sonner.tsx` — canonical shadcn Toaster wrapper (manual paste)
+- `tests/unit/lib/toast.test.ts` — ~5 unit tests
+- `tests/component/ui/sonner.test.tsx` — 1 smoke test
+- `tests/integration/phase8-toasts-smoke.test.tsx` — ~4 integration tests
+
+### 3.2 Modified files
+
+- `src/renderer/App.tsx` — mount `<Toaster />` alongside `<ModalLayer />`
+- `src/renderer/stores/file-store.ts` — add 3 toast calls (save, openFile, openFolder)
+- `src/renderer/components/modals/ExportPdfDialog.tsx` — toast on submit result
+- `src/renderer/components/modals/ExportDocxDialog.tsx` — toast on submit result
+- `src/renderer/components/modals/ExportHtmlDialog.tsx` — toast on submit result
+- `src/renderer/components/modals/ExportBatchDialog.tsx` — toast on submit result
+
+---
+
+## 4. Data Flow
+
+User action → store action OR export dialog submit → IPC call → result →
+- if error: `toast.error(message)` → sonner renders in bottom-right portal
+- if success: `toast.success(message)` → sonner renders
+- inline error banner in dialog stays as per-dialog context (NOT removed)
+
+Theme comes from `useTheme()` in the Toaster component, not from individual toasts. The Toaster is mounted once at the app level.
+
+For the 4 export dialogs: the existing inline error banner stays (it's contextual to the dialog), AND a toast is fired. This gives the user both immediate context (in the dialog) and persistent notification (toast in corner).
+
+For file save: ONLY a toast (no inline error UI in the editor pane — keeps the editor clean). Errors still show the toast.
+
+---
+
+## 5. Error Handling
+
+- **Toast helpers never throw.** They are thin re-exports of sonner, which handles its own error cases (e.g., render failures, missing portal target).
+- **In tests**, the `toast` module is mocked so calls don't render real toasts. Mock signature: `vi.mock('@/lib/toast', () => ({ toast: { success: vi.fn(), error: vi.fn(), ... } }))`.
+- **Theme fallback:** If `useTheme()` is loading or `resolvedTheme` is undefined, Toaster uses `'system'` as a fallback (sonner's default behavior).
+- **Sonner missing:** If for some reason sonner fails to load, the toast calls become no-ops. The user still sees inline error banners in the export dialogs.
+- **Inline error banners stay.** They are not replaced by toasts — they complement them.
+
+---
+
+## 6. Testing Strategy
+
+### 6.1 Unit tests (`tests/unit/lib/toast.test.ts`)
+
+5 tests:
+- `toast.success` calls sonner `toast.success` with the message
+- `toast.error` calls sonner `toast.error` with the message
+- `toast.info` calls sonner `toast.info`
+- `toast.warning` calls sonner `toast.warning`
+- `toast.promise` forwards the promise and messages to sonner
+
+All tests mock the sonner module and verify the forwarded call.
+
+### 6.2 Component test (`tests/component/ui/sonner.test.tsx`)
+
+1 smoke test: `<Toaster />` renders without crashing inside a ThemeProvider.
+
+### 6.3 Integration test (`tests/integration/phase8-toasts-smoke.test.tsx`)
+
+~4 tests:
+- Saving a file → `toast.success` called with `"Saved test.md"`
+- Opening a non-existent file (ipc returns error) → `toast.error` called with file path in message
+- Export success (ipc returns ok) → `toast.success` called + dialog closes
+- Export failure (ipc returns error) → `toast.error` called + inline banner shown + dialog stays open
+
+TDD throughout. Mocks for `ipc.*` and `lib/toast`.
+
+### 6.4 Existing tests must still pass
+
+- All 243 tests from Phase 7 must remain green
+- Export dialog tests will need updates to verify the new toast calls (the dialog tests currently check for inline banner; they should ALSO verify the toast call)
+
+---
+
+## 7. Risks & Open Questions
+
+**Risks:**
+- **Sonner theme switching:** If `useTheme()` returns `'system'` and the OS preference changes mid-session, sonner will re-render. This is the correct behavior; just confirm in test.
+- **Toast spam:** If user holds Cmd+S, the save could fire many times. Sonner deduplicates by default for similar messages? → Decision: rely on sonner's default behavior. If spam becomes an issue, add a `toast.dismiss()` debounce in v2.
+
+**Open questions (deferrable):**
+- Should we add a custom toast for "undo last close" (Phase 9's undo feature)? → Decision: out of scope for Phase 8. Phase 9 will handle undo toasts.
+- Should the export dialog inline banner be removed once toasts are wired? → Decision: NO — keep both. The inline banner is contextual to the dialog; the toast is global. They serve different purposes.
+
+---
+
+## 8. Out of Scope (deferred to later phases)
+
+- Phase 9: Undo toasts ("Tab closed — Undo" with action button)
+- Phase 9: Long-running operation progress toasts (e.g., batch export queue)
+- Phase 9: Custom toast variants for advanced tools (ASCII generator, table generator)
+- Phase 10: Cleanup of inline error banners (will evaluate in Phase 10 if redundant)
+
+---
+
+## 9. Success Criteria
+
+Phase 8 is complete when:
+- `lib/toast.ts` exists with typed wrappers
+- `<Toaster />` is mounted in `App.tsx` and renders toasts
+- `useFileStore.saveActiveBuffer` calls `toast.success`/`toast.error` on result
+- `useFileStore.openFile` calls `toast.error` on failure
+- `useFileStore.openFolder` calls `toast.error` on failure
+- 4 export dialogs call `toast.success`/`toast.error` on result
+- All tests pass: ~+10 new tests, total ~253
+- `npx vite build` succeeds
+- Branch tagged `phase-8-toasts` and pushed to origin

docs/superpowers/specs/2026-06-05-phase-9-advanced-tools-design.md

@@ -0,0 +1,303 @@
+# Phase 9 — Advanced Tools Design
+
+> Companion to the parent plan: `docs/superpowers/plans/2026-06-05-react-ui-redesign.md` (Phase 9 is sketched at high level; this spec locks architecture, file map, and contracts so it can be planned task-by-task.)
+
+**Date:** 2026-06-05
+**Phase:** 9 of 10 (React + shadcn/ui UI redesign)
+**Tag (on completion):** `phase-9-advanced-tools`
+
+---
+
+## 1. Goal & Non-Goals
+
+**Goal:** Add 10 advanced tools to the React renderer. Group 1: Standalone dialogs (ASCII generator, Table generator, Word export, Find-in-files). Group 2: Global overlays (Zen mode, REPL, Print preview). Group 3: Editor/sidebar integrations (Minimap, Breadcrumbs-with-symbols, Git status). All triggered via the Phase 6 command store.
+
+**Non-goals (Phase 9):**
+- True undo/redo stack (still not in scope)
+- Snippet/template library
+- Custom REPL with full JS eval (we chose markdown snippet preview for safety)
+- Custom diff/merge UI (just shows git status, no in-app diffing)
+- Plug-in extensions
+- Multi-cursor editing
+- LSP / language server integration
+
+**Decision summary (from brainstorming):**
+- REPL = **markdown snippet preview** (no JS eval — safe in renderer)
+- Word export = **`.docx` via `docx` lib in renderer**, with both Standard and Custom .dotx template modes
+- Find-in-files = **recursive search with result navigation** (new IPC, regex support)
+
+---
+
+## 2. Architecture
+
+### 2.1 Three mount strategies
+
+| Category | Mount | Examples |
+|---|---|---|
+| **Dialogs** | `<ModalLayer />` (Phase 7 pattern) | ASCII gen, Table gen, Word export, Find-in-files |
+| **Global overlays** | Top-level in `App.tsx` (like `<Toaster />`) | Zen mode, REPL panel, Print preview |
+| **Editor/sidebar integrations** | Extend existing components | Minimap, Breadcrumbs, Git status |
+
+The ModalLayer is the dispatcher for dialogs. The global overlays are mounted directly in `App.tsx` because they need to participate in the top-level layout (full-window, or pinned to the bottom).
+
+### 2.2 ModalState union extension
+
+The Phase 7 `ModalState` discriminated union (9 kinds) gets 4 new kinds for the new dialogs:
+
+```ts
+export type ModalState =
+  | { kind: null }
+  | { kind: 'export-pdf'; props: { sourcePath: string } }
+  | { kind: 'export-docx'; props: { sourcePath: string } }
+  | { kind: 'export-html'; props: { sourcePath: string } }
+  | { kind: 'export-batch'; props: { sourcePaths: string[] } }
+  | { kind: 'export-word'; props: { sourcePath: string } }   // NEW
+  | { kind: 'ascii-generator' }                                  // NEW
+  | { kind: 'table-generator' }                                  // NEW
+  | { kind: 'find-in-files' }                                    // NEW
+  | { kind: 'settings' }
+  | { kind: 'about' }
+  | { kind: 'welcome' }
+  | { kind: 'confirm'; props: ConfirmProps };
+```
+
+Three of the four new kinds (ascii, table, find-in-files) take no props — they read from the active buffer via `useExportSource` (for ascii/table) or from `useFileStore.rootPath` (for find-in-files). `export-word` takes `sourcePath` like the other export dialogs.
+
+### 2.3 New commands in command store
+
+| Command ID | Trigger | Opens |
+|---|---|---|
+| `tools.ascii` | new | `AsciiGeneratorDialog` |
+| `tools.table` | new | `TableGeneratorDialog` |
+| `tools.exportWord` | new | `WordExportDialog` |
+| `tools.findInFiles` | new | `FindInFilesDialog` |
+| `tools.repl` | new | toggles REPL panel |
+| `view.zenMode` | existing (Phase 6) | toggles Zen mode overlay |
+| `file.print` | new | opens `PrintPreview` overlay |
+| `git.refresh` | new | re-fetches git status |
+
+All registered in `src/renderer/lib/commands/register-menu-commands.ts`.
+
+### 2.4 New IPC surface
+
+```ts
+// src/renderer/lib/ipc.ts (additions)
+ipc.file.search({ rootPath, query, isRegex, caseSensitive }: {
+  rootPath: string;
+  query: string;
+  isRegex: boolean;
+  caseSensitive: boolean;
+}): Promise<IpcResult<Array<{ filePath: string; line: number; content: string }>>>;
+
+ipc.file.gitStatus({ rootPath }: { rootPath: string }): Promise<IpcResult<Array<{ filePath: string; status: 'modified' | 'added' | 'deleted' | 'untracked' }>>>;
+
+ipc.file.print({ html }: { html: string }): Promise<IpcResult<void>>;
+
+ipc.file.writeBuffer({ path, buffer }: { path: string; buffer: Uint8Array }): Promise<IpcResult<void>>;
+```
+
+The main process counterparts are added to `src/main.js` (or a new `src/main/files-search.js`, etc.). For Phase 9, the spec covers the renderer-side design; main-process IPC handlers are assumed to follow the same `ipcMain.handle` pattern as the existing handlers.
+
+### 2.5 Settings additions (`useSettingsStore`)
+
+```ts
+// zod schema additions:
+docxCustomTemplatePath: z.string().nullable().default(null),  // path to user .dotx file
+replOpen: z.boolean().default(false),                         // REPL panel visibility
+breadcrumbSymbols: z.boolean().default(true),                  // breadcrumbs show code symbols
+// minimap already exists from Phase 7 (useSettingsStore.minimap: z.boolean().default(true))
+```
+
+The `minimap` setting from Phase 7 is now wired (not just stored).
+
+---
+
+## 3. File Map
+
+### 3.1 Created files
+
+**Dialogs (in `src/renderer/components/modals/`):**
+- `AsciiGeneratorDialog.tsx` — input textarea, font select, output preview with copy button
+- `TableGeneratorDialog.tsx` — rows × cols inputs, header checkbox, output preview
+- `WordExportDialog.tsx` — template select (Standard / Custom .dotx), options, preview, export
+- `FindInFilesDialog.tsx` — query input, regex/case toggles, results list with click-to-navigate
+
+**Global overlays (in `src/renderer/components/tools/`):**
+- `ReplPanel.tsx` — bottom-pinned, textarea + rendered preview
+- `PrintPreview.tsx` — full-window print preview
+
+**Editor/sidebar integrations:**
+- `src/renderer/components/layout/ZenMode.tsx` — wraps/controls the editor in zen mode (or modify `AppShell.tsx` to hide chrome)
+- `src/renderer/components/sidebar/GitStatusPanel.tsx` — file list with status badges
+
+**Lib:**
+- `src/renderer/lib/docx-export.ts` — renderer-side `docx` lib integration (markdown → Blob)
+- `src/renderer/hooks/use-zen-mode.ts` — small hook that reads `useSettingsStore.zenMode`
+
+**Modifications:**
+- `src/renderer/App.tsx` — mount `<ReplPanel />` and `<PrintPreview />` alongside `<ModalLayer />` and `<Toaster />`
+- `src/renderer/components/layout/AppShell.tsx` — when `zenMode === true`, hide all chrome except the editor
+- `src/renderer/components/editor/CodeMirrorEditor.tsx` — add `@codemirror/minimap` (or `@replit/codemirror-minimap`) when `useSettingsStore.minimap` is true
+- `src/renderer/components/layout/Breadcrumb.tsx` — extend to show symbols (headings, code blocks) using `@codemirror/langs-data` or a simple markdown AST walk
+- `src/renderer/components/sidebar/Sidebar.tsx` — add a "Git" tab to the existing tab list
+- `src/renderer/stores/settings-store.ts` — add 3 new fields
+- `src/renderer/lib/validators.ts` — add 3 new fields to `settingsSchema`
+- `src/renderer/lib/ipc.ts` — add 4 new IPC methods
+- `src/renderer/lib/commands/register-menu-commands.ts` — add 8 new commands
+- `src/main.js` (or split files) — add 4 main-process IPC handlers
+
+**Tests:**
+- `tests/component/tools/ReplPanel.test.tsx` — smoke test
+- `tests/component/tools/PrintPreview.test.tsx` — smoke test
+- `tests/component/modals/AsciiGeneratorDialog.test.tsx` — 3 tests
+- `tests/component/modals/TableGeneratorDialog.test.tsx` — 3 tests
+- `tests/component/modals/WordExportDialog.test.tsx` — 4 tests
+- `tests/component/modals/FindInFilesDialog.test.tsx` — 4 tests
+- `tests/component/sidebar/GitStatusPanel.test.tsx` — 3 tests
+- `tests/component/layout/Breadcrumb.test.tsx` — extend with symbols test
+- `tests/integration/phase9-tools-smoke.test.tsx` — 6 tests (one per command-triggered tool)
+
+---
+
+## 4. Data Flow
+
+### 4.1 Word export (most complex)
+
+1. User triggers `tools.exportWord` → `registerMenuCommands` opens the export-word modal via `useAppStore.openModal('export-word', { sourcePath: activeTabId })`
+2. **Wait** — we need a new modal kind `export-word` in the `ModalState` union. Add it.
+3. `WordExportDialog` (mounted by ModalLayer) shows:
+   - Template select: "Standard (bundled)" or "Custom .dotx (your file)" — pre-populated with `useSettingsStore.docxCustomTemplatePath`
+   - "Choose custom template..." button (file picker, saves to settings)
+   - Options: embed images (checkbox), include front matter (checkbox)
+   - Preview area: shows the generated docx structure (sizes, table of contents)
+4. On submit:
+   - Renderer calls `lib/docx-export.ts#generateDocx(source, templatePath, options)` which uses the `docx` lib
+   - The lib takes a `Document` AST and produces a Blob
+   - ASCII tables are converted to monospace `<w:r>` runs (using `applyAsciiTransform` from Phase 7)
+   - Images are extracted from markdown and embedded as base64
+   - If a custom .dotx path is set, the renderer reads it via `ipc.file.read` and applies its styles (via `docx` lib's style support)
+   - User picks output path via `ipc.app.showSaveDialog`
+   - Writes Blob via `ipc.file.writeBuffer` (new)
+   - Toast success/failure
+
+### 4.2 Find-in-files
+
+1. User triggers `tools.findInFiles` → ModalLayer opens `FindInFilesDialog`
+2. User types query, picks regex/literal, case-sensitive toggle
+3. On submit: `ipc.file.search({ rootPath: useFileStore.rootPath, query, isRegex, caseSensitive })`
+4. Backend walks the disk recursively, applies regex/literal match, returns `Array<{ filePath, line, content }>`
+5. Dialog shows result list (file:line:content, clickable)
+6. Click a result:
+   - `useFileStore.openFile(filePath)` if not already open
+   - Set the cursor in the editor to the matched line
+7. Close the dialog
+
+### 4.3 REPL (markdown snippet preview)
+
+1. User triggers `tools.repl` → toggles `useSettingsStore.replOpen` (or a new dedicated `useReplStore`)
+2. `ReplPanel` (mounted in App.tsx) is visible when `replOpen === true`
+3. The panel has:
+   - Top half: textarea (user types/pastes markdown)
+   - Bottom half: rendered preview (uses `lib/markdown.ts` from Phase 1 + DOMPurify)
+4. Updates are debounced (300ms) for the preview
+5. Pure renderer-side, no IPC
+
+### 4.4 Zen mode
+
+1. User triggers `view.zenMode` → toggles `useSettingsStore.zenMode`
+2. `AppShell` reads `zenMode` from store; when true, hides all chrome (header, tabs, toolbar, breadcrumb, status bar, sidebar)
+3. Editor goes fullscreen
+4. Pressing Esc exits zen mode (keydown listener in `use-zen-mode` hook)
+
+### 4.5 Print preview
+
+1. User triggers `file.print` → opens `PrintPreview` (full-window overlay)
+2. The preview renders the current buffer's content as it would appear in print
+3. Two buttons: "Print" (calls `ipc.file.print({ html })` which opens native print dialog) and "Close"
+
+### 4.6 Minimap
+
+1. `useSettingsStore.minimap` (existing setting) is read by `CodeMirrorEditor`
+2. When true, the editor's extension includes `@replit/codemirror-minimap` (or a simpler custom implementation)
+3. The minimap shows a shrunk version of the document on the right side of the editor
+4. Toggling the setting adds/removes the extension dynamically
+
+### 4.7 Breadcrumbs-with-symbols
+
+1. The current `Breadcrumb` shows the file path. Extend it to also show markdown symbols (headings, code blocks)
+2. Use a simple AST walk of the current buffer to extract heading levels
+3. Show as a path-like navigation: `file.md > H1: Title > H2: Section > #line`
+4. The `useSettingsStore.breadcrumbSymbols` toggle (default true) controls whether symbols are shown
+
+### 4.8 Git status
+
+1. On sidebar Git tab open, fetch `ipc.file.gitStatus({ rootPath: useFileStore.rootPath })`
+2. The main process runs `git status --porcelain` (or equivalent) and returns the list
+3. Show file list with status badges (M, A, D, ?)
+4. Click a file opens it via `useFileStore.openFile`
+5. `git.refresh` re-fetches
+
+---
+
+## 5. Error Handling
+
+- **Word export failures:** `lib/docx-export.ts` catches `docx` lib errors → toast.error
+- **Word export missing .dotx:** if custom template path is set but file doesn't exist, show inline banner in the dialog
+- **Find-in-files failures:** if `ipc.file.search` throws (regex syntax error, IO error), show inline banner in the dialog
+- **REPL:** no IPC, no error handling needed
+- **Git status:** if folder isn't a git repo, return empty array. Panel shows "Not a git repository" message
+- **Print:** if `ipc.file.print` fails (no printer, user cancels), toast.error or silent close
+- **Minimap, Breadcrumbs:** renderer-side, no errors
+
+---
+
+## 6. Testing Strategy
+
+- **Unit tests:** `lib/docx-export.ts` (markdown → docx conversion, ASCII handling), `lib/ascii-table.ts` (already tested)
+- **Component tests:** 1-2 smoke tests per new component
+- **Integration test:** `phase9-tools-smoke.test.tsx` covering the 6 command-triggered tools (dispatch opens correct modal/overlay)
+- **Editor integrations:** minimap toggle, breadcrumbs render with symbols, git status panel render
+- **Target: +30-40 new tests**, total ~290
+
+---
+
+## 7. Risks & Open Questions
+
+**Risks:**
+- **`docx` lib bundle size (~500KB).** Acceptable for a desktop app but worth noting. Lazy-load if it becomes a concern.
+- **Word export custom template parsing** — the `.dotx` format is a zip with XML inside. The `docx` lib may not fully support reading existing templates. v1 may need a simpler "styles only" extraction.
+- **Find-in-files regex compilation** — invalid regex would throw. Validate on the renderer before calling IPC.
+- **Minimap performance** — for large files, the minimap can slow down scrolling. CodeMirror's built-in minimap has performance options to configure.
+
+**Open questions (deferrable):**
+- **REPL persistence** — should the textarea content survive across modal close/reopen? → Decision: NO for v1. Keep simple.
+- **Git status auto-refresh** — should it auto-refresh every N seconds? → Decision: NO for v1. Manual via `git.refresh` command.
+- **Find-in-files result count limit** — what if there are 10,000 matches? → Decision: limit to 500 results for v1, show "X more matches" message.
+
+---
+
+## 8. Out of Scope (deferred to Phase 10 or later)
+
+- Custom undo/redo (still not in scope)
+- Snippet/template library
+- Multi-cursor editing
+- LSP / language server
+- Phase 10 will delete legacy files including the old `src/print-preview.js`, `src/wordTemplateExporter.js`, `src/welcome.js`, `src/zen-mode.js`, etc.
+
+---
+
+## 9. Success Criteria
+
+Phase 9 is complete when:
+- All 10 features implemented and accessible via the command store
+- `lib/docx-export.ts` generates valid `.docx` files
+- Find-in-files returns results from a recursive disk walk
+- REPL renders markdown snippet previews
+- Zen mode hides all chrome and Esc exits
+- Print preview opens native print dialog
+- Minimap appears when `useSettingsStore.minimap` is true
+- Breadcrumbs show symbols by default
+- Git status panel shows modified/added/deleted/untracked files
+- ~+30-40 new tests, total ~290
+- `npx vite build` succeeds
+- Branch tagged `phase-9-advanced-tools` and pushed to origin

docs/superpowers/specs/2026-06-05-react-ui-redesign-design.md

@@ -0,0 +1,361 @@
+# MarkdownConverter — React + shadcn/ui UI Redesign
+
+**Date:** 2026-06-05
+**Status:** Design (awaiting user approval)
+**Branch:** `react-electron`
+**Author:** Brainstormed with user via superpowers:brainstorming
+
+## Summary
+
+Replace the legacy vanilla JS renderer (`src/renderer.js` is 213 KB; `src/styles.css` is 74 KB) with a modern React 19 + Vite + TypeScript + shadcn/ui renderer that achieves visual feature parity while delivering a Polished + Glassy (Raycast/Arc-style) aesthetic. The Electron main process, preload bridge, and IPC contracts stay unchanged. Work proceeds via vertical slices — each PR ships a demoable feature.
+
+## Goals
+
+1. Replace every render-time feature of the legacy renderer with an idiomatic React + shadcn/ui implementation.
+2. Adopt the "Polished + Glassy" visual language (subtle shadows, 8–12 px radii, gradient accents, gentle depth) on top of the existing ConcreteInfo brand tokens and design system.
+3. Use a single component foundation (shadcn/ui) and a single motion library (Motion / Framer Motion) to keep the dependency surface narrow and the design coherent.
+4. Keep the main process, preload, and IPC contracts untouched. The renderer is the only surface being rewritten.
+5. Keep the app runnable at every commit. No "big bang" merge.
+
+## Non-Goals
+
+- Migrating the main process to TypeScript (out of scope for this spec).
+- Adding new features the legacy renderer does not have (plugin system, AI features, etc. — those are future specs).
+- Replacing Pandoc/FFmpeg/ImageMagick orchestration.
+- Changing the packaging pipeline (electron-builder config stays).
+- Replacing the CodeMirror 6 editor — it is the right tool and is already wired up.
+
+## Decisions Locked During Brainstorming
+
+| Decision | Choice | Why |
+|---|---|---|
+| Scope | Full feature parity with legacy renderer | User-selected option. Renderer is one cohesive surface; splitting it across specs would force premature contracts. |
+| Visual style | **B — Polished + Glassy** (Raycast/Arc aesthetic) | "Fancy" comes from elevation, gradient accents, and material depth — not over-designed visuals. |
+| Layout | **2 — IDE-style** (equal editor/preview, draggable divider, collapsible sidebar) | Power-user markdown apps converge on this. Draggable divider + keyboard reset. |
+| Modal patterns | **A (Centered Dialog), B (Right Side-Sheet), D (Toasts)** | No command palette. |
+| Command palette | **No** — full menus, no ⌘K | Power users can use the OS-level launcher. App stays focused on writing. |
+| Animation | **Motion (Framer Motion)** | Best for layout transitions, modal/drawer enter/exit, drag. Sparingly used. |
+| Component library | **shadcn/ui** | Tailwind + Radix primitives, copy-paste ownership, perfect fit for the "glassy" aesthetic and the HSL-CSS-variable foundation that is already in place. |
+| Implementation strategy | **Vertical slices** — one feature end-to-end per PR | App stays runnable. Each PR is reviewable. |
+
+## Defaults (Used Unless Overridden Later)
+
+| Item | Default | Why |
+|---|---|---|
+| State management | Zustand (already in deps) + Immer for nested patches | Already in `package.json`; perfect for editor state. |
+| Theming | shadcn `next-themes`, dark default + light, system-aware | shadcn canonical pattern. Brand colors already in CSS vars. |
+| Icons | `lucide-react` (already in deps) | 1000+ tree-shakable icons. |
+| Forms | `react-hook-form` + `zod` | Standard for shadcn forms. |
+| Drag/drop (sortable lists) | `@dnd-kit/core` | De facto React drag lib (file tree reordering, plugin list reorder). |
+| Pane resize (split layout) | `react-resizable-panels` | Canonical React lib for resizable pane groups; handles drag, arrow keys, snap, persisted sizes. |
+| Testing | Vitest + RTL + Playwright (E2E + visual regression) | Standard for React + Electron. |
+| TypeScript | Strict mode (already wired) | Already in deps and `vite.renderer.config.ts`. |
+
+## Architecture
+
+The Electron app keeps its existing process model. Only the renderer is rewritten.
+
+```
+┌──────────────────────────────────────────────────────────┐
+│  Electron Main (UNCHANGED)                                │
+│  - BrowserWindow, IPC handlers, file/fs ops               │
+│  - Pandoc, FFmpeg, ImageMagick orchestration              │
+└────────────┬─────────────────────────────────────────────┘
+             │ contextBridge (UNCHANGED preload.js)
+┌────────────▼─────────────────────────────────────────────┐
+│  React Renderer (REWRITTEN)                                │
+│  ┌────────────────────────────────────────────────────┐  │
+│  │  AppShell (layout)                                  │  │
+│  │  ├─ MenuBar (native)                                │  │
+│  │  ├─ AppHeader (logo, breadcrumbs, theme toggle)     │  │
+│  │  ├─ TabBar (open files)                             │  │
+│  │  ├─ Toolbar (formatting)                            │  │
+│  │  ├─ ResizablePaneGroup (sidebar | editor | preview) │  │
+│  │  │   ├─ Sidebar (file tree, outline)                │  │
+│  │  │   ├─ EditorPane (CodeMirror 6)                   │  │
+│  │  │   └─ PreviewPane (marked + KaTeX + Mermaid)      │  │
+│  │  ├─ StatusBar (word count, encoding, cursor pos)    │  │
+│  │  └─ ModalLayer (Dialog, SideSheet, Toaster)         │  │
+│  └────────────────────────────────────────────────────┘  │
+│  ┌────────────────────────────────────────────────────┐  │
+│  │  Feature Modules (each owns UI + state slice)       │  │
+│  │  ├─ editor/    CodeMirror wrapper, syntax, themes   │  │
+│  │  ├─ preview/   markdown→html, KaTeX, Mermaid       │  │
+│  │  ├─ tabs/      open files, dirty state              │  │
+│  │  ├─ sidebar/   file tree, outline, search results   │  │
+│  │  ├─ modals/    export, settings, about, etc.        │  │
+│  │  ├─ tools/     zen, repl, ascii-gen, table-gen      │  │
+│  │  └─ export/    pdf, docx, html, image batch         │  │
+│  └────────────────────────────────────────────────────┘  │
+│  ┌────────────────────────────────────────────────────┐  │
+│  │  Shared Infrastructure                              │  │
+│  │  ├─ stores/  Zustand slices per feature             │  │
+│  │  ├─ hooks/   useFile, useEditor, useTheme, etc.     │  │
+│  │  ├─ lib/     cn, ipc, formatters, validators        │  │
+│  │  ├─ ui/      shadcn primitives: button, dialog…     │  │
+│  │  └─ types/   shared TS types                        │  │
+│  └────────────────────────────────────────────────────┘  │
+└──────────────────────────────────────────────────────────┘
+```
+
+### Architectural Rules
+
+- **Shell components** (`AppHeader`, `TabBar`, `StatusBar`) subscribe only to `useAppStore`.
+- **Feature components** subscribe to their own feature's store.
+- **Cross-feature access** goes through hooks, not direct store imports (e.g., `useFileTree()` wraps `useFileStore`).
+- **Feature modules are self-contained** — each owns its components, its Zustand slice, and its types. Safe to develop in parallel later.
+- **No direct `window.electronAPI` calls** from feature code. All IPC goes through `lib/ipc.ts` for type safety and error normalization.
+
+## State Management
+
+```
+stores/
+├─ useAppStore        // global UI: theme, sidebar, pane sizes, modals open
+├─ useFileStore       // file system: tree, open files, active tab
+├─ useEditorStore     // editor: per-file content, cursor, selection, dirty
+├─ usePreviewStore    // preview: scroll sync, zoom, theme
+├─ useSettingsStore   // user prefs (persisted to electron-store)
+└─ useCommandStore    // menu actions registry, recent actions
+```
+
+**Why slices instead of one mega-store?** Editor content can be megabytes. Keeping it in its own slice lets React avoid re-rendering the preview when only the editor changes — components subscribe with selectors.
+
+**Persistent state** (auto-saved to electron-store via Zustand `persist` middleware): theme, sidebar visibility, last open files, pane divider positions, settings.
+
+**Ephemeral state** (lost on quit): active modal, hover states, search query, current file content (saved to disk on idle).
+
+## Visual Design System
+
+### Color Tokens
+
+The existing `globals.css` HSL variables stay. Additions for the "glassy" aesthetic:
+
+```css
+--shadow-sm: 0 1px 2px rgba(13, 11, 9, 0.06);
+--shadow-md: 0 4px 12px rgba(13, 11, 9, 0.08), 0 0 0 1px rgba(13, 11, 9, 0.04);
+--shadow-lg: 0 12px 32px rgba(13, 11, 9, 0.12), 0 0 0 1px rgba(13, 11, 9, 0.06);
+--shadow-glow-brand: 0 0 24px rgba(229, 70, 31, 0.25);
+
+--glass-bg-light: rgba(255, 255, 255, 0.72);
+--glass-bg-dark:  rgba(13, 11, 9, 0.72);
+--glass-border-light: rgba(255, 255, 255, 0.4);
+--glass-border-dark:  rgba(255, 255, 255, 0.08);
+```
+
+### shadcn Components
+
+Install via `npx shadcn@latest add`:
+
+**Primitives** (need all of these): `button`, `dialog`, `sheet`, `popover`, `tooltip`, `select`, `dropdown-menu`, `tabs`, `separator`, `scroll-area`, `toggle`, `switch`, `slider`, `input`, `textarea`, `label`, `form`, `skeleton`, `sonner`, `command`.
+
+**Composite** (custom-built on top of primitives): `file-tree`, `pane-group`, `divider`, `status-bar`, `menu-bar`, `toast`.
+
+### Typography
+
+- Body: Plus Jakarta Sans 15 px / line-height 1.6
+- Code: JetBrains Mono 13.5 px
+- Display: Barlow Condensed 700/800 — used sparingly (page titles, big metrics)
+- Headings: Plus Jakarta Sans 600/700 with tight letter-spacing
+- Labels (`.label`): Plus Jakarta Sans 500, 12 px, uppercase, 0.05 em letter-spacing
+
+### Motion Choreography
+
+| Element | Motion | Duration | Easing |
+|---|---|---|---|
+| Modal (Dialog A) | Scale 0.96→1, opacity 0→1 | 200 ms | `ease-out` |
+| Side sheet (B) | TranslateX 100%→0, opacity 0→1 | 300 ms | `cubic-bezier(0.16, 1, 0.3, 1)` |
+| Toast | TranslateY 100%→0, opacity | 250 ms | spring(stiffness: 300, damping: 30) |
+| Sidebar toggle | Width 264 px↔72 px, content fade | 250 ms | `ease-in-out` |
+| Divider drag | Live width update | 0 ms | none (instant) |
+| Theme switch | CSS variables, opacity overlay | 300 ms | `ease-in-out` |
+| Tab switch | Underline slide | 200 ms | `ease-out` |
+| Hover (buttons) | `bg` + `shadow` shift | 150 ms | `ease-out` |
+| Focus ring | Outline grow | 100 ms | `ease-out` |
+
+**Rules:** Every motion has a purpose. No gratuitous animation. Respects `prefers-reduced-motion` (Motion handles this automatically).
+
+### Empty / Loading / Error States
+
+Every async surface ships all three. Sonner toasts for ephemeral feedback. Skeleton screens for content areas. Empty-state components with icon + message + primary CTA.
+
+## Modal/Overlay Patterns
+
+| Use case | Pattern | Why |
+|---|---|---|
+| Export (PDF/DOCX/HTML) | A — Centered Dialog | Focused decision, ~3–5 fields, "do one thing" |
+| Settings | B — Right Side-Sheet | Long form, tabbed sections, stays open while editing |
+| Find/Replace | Inline toolbar (not modal) | Always-visible utility |
+| About | A — Centered Dialog | Tiny info dump |
+| Confirm destructive (delete, close unsaved) | A — Centered Dialog | Forces attention |
+| File save error | D — Toast | Non-blocking info |
+| Pandoc/FFmpeg progress | D — Toast → sticky on >3 s | Background work feedback |
+| Plugin manager | B — Right Side-Sheet | Lists + per-item actions |
+| ASCII/Table generators | A — Centered Dialog | Tool-style focused input → output |
+| Print preview | A — Centered Dialog | Full-screen-ish modal overlay |
+| Welcome (first launch) | A — Centered Dialog | One-time onboarding |
+| Word export | A — Centered Dialog | Template selection |
+| Zen mode | Full-viewport toggle (no modal) | Replaces the editor entirely |
+| REPL | Bottom-pinned panel (split-pane) | Persistent terminal-like UI |
+| Quick file open | B — Right Side-Sheet | File tree, search, recent |
+
+### Dialog A Anatomy (Export as example)
+
+```
+┌─ Backdrop (rgba(13,11,9,0.45) + backdrop-blur 4px) ─────────┐
+│                                                            │
+│   ┌──── Modal (max-w-md, rounded-2xl, shadow-lg) ─────┐    │
+│   │ ┌── Header ────────────────────────────────────┐  │    │
+│   │ │ [Icon] Export as PDF                  [×]    │  │    │
+│   │ │ Choose format options                       │  │    │
+│   │ └─────────────────────────────────────────────┘  │    │
+│   │ ┌── Body ──────────────────────────────────────┐  │    │
+│   │ │ Format: [Letter] [A4] [Legal]                │  │    │
+│   │ │ Margins: ────●────                           │  │    │
+│   │ │ ☐ Include table of contents                  │  │    │
+│   │ │ ☐ Embed fonts                                │  │    │
+│   │ └─────────────────────────────────────────────┘  │    │
+│   │ ┌── Footer ────────────────────────────────────┐  │    │
+│   │ │                       [Cancel] [Export →]    │  │    │
+│   │ └─────────────────────────────────────────────┘  │    │
+│   └──────────────────────────────────────────────────┘    │
+│                                                            │
+└────────────────────────────────────────────────────────────┘
+```
+
+### Side-Sheet B Anatomy (Settings as example)
+
+Slides in from right, ~50 % width (max 560 px). Backdrop is `rgba(13,11,9,0.2)` with `backdrop-blur(2 px)` (lighter than dialog — the sheet is the focus). Tab navigation in the sheet header (Editor / Theme / Export / Plugins / About).
+
+### Toast D Anatomy (Sonner)
+
+Stacked bottom-right, max 3 visible. Glass background. Color-coded 3 px left border — success `#1a7a56`, error `#ef4444`, info `#0ea5e9`, warning `#eab308`. Icon + title + description. Optional action button. Auto-dismiss 4 s for success, sticky for error.
+
+## Data Flow (Editor → Preview Pipeline)
+
+```
+User types
+  ↓
+CodeMirror onChange
+  ↓
+useEditorStore.updateContent(tabId, content)  ← debounced 50 ms
+  ↓
+┌─ Persist to electron-store on idle (1 s) ─┐
+│                                            │
+└─ Publish to usePreviewStore (subscribed) ─┘
+  ↓
+marked(content) → sanitized HTML
+  ↓
+PreviewPane renders HTML
+  KaTeX post-processes $...$
+  Mermaid post-processes ```mermaid
+  Highlight.js post-processes ```lang
+  ↓
+useEffect: scroll-sync editor cursor → preview position
+```
+
+**Bidirectional scroll sync:** editor scroll → preview (primary), preview click → editor cursor (secondary). Throttled to 60 fps via `requestAnimationFrame`.
+
+## IPC Contract
+
+The preload bridge stays unchanged. A new `src/renderer/lib/ipc.ts` wraps every channel with TypeScript types and normalizes errors to a discriminated union:
+
+```ts
+type IpcResult<T> =
+  | { ok: true; data: T }
+  | { ok: false; error: { code: string; message: string } };
+
+export const ipc = {
+  file: {
+    open: (): Promise<IpcResult<FileResult>>,
+    read: (path: string): Promise<IpcResult<string>>,
+    write: (path: string, content: string): Promise<IpcResult<void>>,
+    list: (dir: string): Promise<IpcResult<FileEntry[]>>,
+    onChange: (cb: (path: string) => void) => () => void,
+  },
+  export: {
+    pdf: (opts: PdfOptions): Promise<IpcResult<ExportResult>>,
+    docx: (opts: DocxOptions): Promise<IpcResult<ExportResult>>,
+    html: (opts: HtmlOptions): Promise<IpcResult<ExportResult>>,
+    batch: (items: BatchItem[], opts: BatchOptions): Promise<IpcResult<BatchResult>>,
+  },
+  app: {
+    getVersion: (): Promise<IpcResult<string>>,
+    openExternal: (url: string): Promise<IpcResult<void>>,
+    showItemInFolder: (path: string): Promise<IpcResult<void>>,
+  },
+};
+```
+
+## Error Handling
+
+Layered defense — no single failure can crash the app:
+
+1. **IPC errors** → caught in `lib/ipc.ts` wrapper, returned as `IpcResult<T>` discriminated union. Components show toast on error.
+2. **Component errors** → React error boundary per feature area (one for editor, one for preview, one for modals). On error: show inline error UI with "Reload this panel" + "Copy details" actions.
+3. **Async operations** (export, file ops) → loading state on button + toast on completion. Long ops (>2 s) get a sticky toast with cancel.
+4. **Validation errors** (settings, export options) → inline form errors via `react-hook-form` + `zod`. shadcn `Form` component for consistent error display.
+5. **Pandoc/FFmpeg missing** → detected at startup, banner + disable export menu items. Don't surprise-fail at export time.
+
+## Testing Strategy
+
+- **Unit (Vitest):** stores, hooks, lib utilities, formatters, validators
+- **Component (Vitest + RTL):** shadcn wrappers, dialog interactions, sidebar toggle, divider drag, theme toggle
+- **Integration (Vitest + RTL):** editor ↔ preview flow, file open → tab add → content display, settings change persists
+- **E2E (Playwright):** app launches, file opens, markdown renders, export to PDF works
+- **Visual regression (Playwright snapshots):** locked-in screenshots for header, sidebar, dialogs, toasts — catch accidental style drift
+- **Target coverage:** stores/hooks/lib ≥ 90 %, components ≥ 75 %, E2E covers all critical paths
+
+## Accessibility (WCAG 2.1 AA)
+
+Baked in via shadcn + Radix:
+
+- All dialogs focus-trap, Esc to close, return focus to trigger
+- All interactive elements keyboard-reachable
+- Visible focus rings (2 px brand ring)
+- 4.5:1 contrast minimum (already met by brand colors)
+- `aria-label` on icon buttons, `role="alert"` on toasts
+- Respects `prefers-reduced-motion` (Motion handles this automatically)
+
+## Implementation Phases (Vertical Slices)
+
+Each phase is a shippable PR that keeps the app runnable. The legacy `renderer.js` is gradually replaced; until each phase is complete, the old renderer code still runs the missing parts.
+
+| # | Phase | Output | Acceptance |
+|---|---|---|---|
+| 1 | **Foundation** | shadcn installed; `next-themes`, `motion`, `react-hook-form`, `zod`, `@dnd-kit/core`, `react-resizable-panels`, `sonner` installed; design tokens finalized; `lib/utils.ts` (`cn`), `lib/ipc.ts` typed wrappers, `lib/motion.ts` preset transitions, `App.tsx` shell skeleton renders | `npm run build` succeeds; dev server shows the new shell with theme toggle working |
+| 2 | **App shell + layout** | `AppHeader`, `TabBar`, `Toolbar`, `Breadcrumb`, `StatusBar`, `ResizablePaneGroup` with sidebar toggle and draggable divider. Empty editor/preview panes. | Resize divider with mouse and arrow keys; sidebar collapses; pane sizes persist. |
+| 3 | **Editor pane** | CodeMirror 6 wrapped, dark/light themes wired to shadcn theme, syntax highlighting, line numbers, search, autocomplete | Open `.md` file → renders in editor; can edit and save. |
+| 4 | **Preview pane** | marked + DOMPurify + KaTeX + Mermaid + highlight.js. Bidirectional scroll sync with editor. | Open file → preview renders, follows cursor. |
+| 5 | **File tree + tabs** | Sidebar file tree (read directory on demand, lazy-expand children only on click). Tabs for open files. Dirty state indicator. File content is read from disk only when the tab is activated. | Open folder → root populates; click folder → children load; click file → opens in tab; close tab reverts dirty. |
+| 6 | **Native menus + toolbar** | Replace the legacy `CommandPalette` with full menus (File / Edit / View / Insert / Format / Tools / Help) bound to keyboard shortcuts. Toolbar buttons. | All menu items invoke the right action; shortcuts work; toolbar reflects active state. |
+| 7 | **Modals** | Export dialog (PDF/DOCX/HTML/batch), Settings side-sheet (Editor/Theme/Export/Plugins/About tabs), About dialog, Confirm-destructive dialog | All dialogs and sheet render with proper motion; settings persist; export works end-to-end. |
+| 8 | **Toasts** | Sonner wired into all async operations (save, export, errors, tool missing) | All operations give appropriate feedback; no silent failures. |
+| 9 | **Advanced tools** | Zen mode (full-viewport toggle), REPL (bottom-pinned panel), ASCII generator, Table generator, Word export template picker, Print preview | Each tool is feature-complete vs. legacy version. |
+| 10 | **Polish + delete legacy** | Visual regression snapshots locked; remove `renderer.js` and old `styles*.css` references from build; `npm run build:linux` produces a working installer | Final PR ships an installer with no legacy code paths. |
+
+## Risks and Mitigations
+
+| Risk | Mitigation |
+|---|---|
+| shadcn CLI requires Vite (not vanilla Electron renderer) | Vite is already configured for the renderer in `vite.renderer.config.ts`; the CLI works against the same project. |
+| shadcn CLI assumes Tailwind is at project root; we have it in renderer/ only | Point the CLI at `src/renderer/components.json` and set `tailwind.css` to the right path. |
+| Marked + KaTeX + Mermaid + highlight.js together is heavy | Lazy-load Mermaid (only when `mermaid` code block encountered). KaTeX is loaded once, cached. |
+| Editor content state can be megabytes → re-render storms | Editor content lives in its own slice; preview subscribes to a derived/cached HTML string; components use `useShallow` / selector subscriptions. |
+| Bidirectional scroll sync loops | `useEffect` debounce + ignore if cursor/selection is the sync source. |
+| CodeMirror 6 doesn't ship a Tailwind theme by default | Use `@codemirror/theme-one-dark` for dark; build a custom theme that pulls from CSS variables for light. |
+| The legacy `renderer.js` and `styles*.css` are referenced from `index.html` (now `src/renderer/index.html`) | Phase 10 deletes the references; until then, both run side-by-side and the new React app sits in a known root div. |
+| Electron `nodeIntegration` is off; we use contextBridge | Already the case. Document the contract clearly in `lib/ipc.ts`. |
+
+## Open Questions (to confirm before implementation)
+
+None. All major decisions are locked. Defaults will be used unless the user overrides them when reviewing the implementation plan.
+
+## References
+
+- `src/renderer.js` (213 KB) — legacy renderer being replaced
+- `src/styles.css` (74 KB), `src/styles-modern.css` (71 KB), `src/styles-concreteinfo.css` (21 KB) — legacy styles being replaced
+- `src/renderer/styles/globals.css` — already shadcn-compatible (HSL CSS variables)
+- `src/renderer/App.tsx` — empty skeleton that references components we will build
+- `tailwind.config.js` — brand colors and fonts already defined
+- `vite.renderer.config.ts` — Vite + React plugin already configured
+- `package.json` — CodeMirror 6, TanStack Table, lucide-react, cva, clsx, tailwind-merge, tailwindcss-animate already installed

docs/superpowers/specs/2026-06-06-phase-10-polish-design.md

@@ -0,0 +1,333 @@
+# Phase 10 — Polish + Delete Legacy Design
+
+> Companion to the parent plan: `docs/superpowers/plans/2026-06-05-react-ui-redesign.md` (Phase 10 is sketched at high level; this spec locks architecture, file map, deletion targets, and version strategy.)
+
+**Date:** 2026-06-06
+**Phase:** 10 of 10 (React + shadcn/ui UI redesign) — **FINAL**
+**Tag (on completion):** `v5.0.0` (the first release tag, all prior phases were `phase-N-*` working tags)
+
+---
+
+## 1. Goal & Non-Goals
+
+**Goal:** Finalize the React UI redesign. Decompose the legacy 146KB `src/main.js` into a feature-first modular structure under `src/main/`, remove the legacy vanilla-JS renderer and all dead IPC bridges, then ship **v5.0.0** with a CHANGELOG.
+
+**Non-goals (Phase 10):**
+- Adding new features (Phases 1-9 shipped all of them)
+- A full main-process test suite (the existing main process is largely untested; adding tests is Phase 11+)
+- Backwards compat shims for the legacy renderer
+- Renderer-side refactor (already done)
+- Migrating the renderer build pipeline further (vite configs are in place)
+
+**Success criteria:**
+- `src/main.js` is gone; `src/main/index.js` is the new entrypoint
+- `package.json#main` points to `src/main/index.js`
+- All 12 legacy renderer files are deleted
+- All 9 dead IPC channels are removed from `preload.js` and `main.js`
+- `src/index.html` is reduced to ~50 lines (just the Vite bootstrap)
+- `package.json#version` is `5.0.0`
+- `CHANGELOG.md` exists in Keep a Changelog 1.1.0 format
+- `git grep -E "renderer\.js|command-palette|print-preview|welcome\.js|zen-mode|wordTemplate|ascii-generator|table-generator|styles\.css"` returns zero results
+- All 305 tests still pass
+- `npx vite build --config vite.renderer.config.ts` succeeds
+- `npx electron .` launches and main window renders
+- Tag `v5.0.0` pushed to origin
+
+---
+
+## 2. Target Architecture
+
+### 2.1 `src/main/` (feature-first decomposition)
+
+```
+src/main/
+├── index.js              # entrypoint: bootstraps store, app, window, ipc
+├── store.js              # electron-store wrapper (preferences + wordTemplatePath)
+├── ipc.js                # ipcMain.handle registration (composes from modules)
+├── files/
+│   ├── index.js          # file ops facade (read/write/list/pickFolder/pickFile)
+│   ├── search.js         # recursive regex search (used by find-in-files)
+│   ├── git.js            # git status porcelain parser
+│   └── binary.js         # writeBuffer helper (Uint8Array → file)
+├── menu/
+│   ├── index.js          # buildMenu() — composes the app menu
+│   └── items.js          # individual menu items (File, Edit, View, etc.)
+├── window/
+│   ├── index.js          # createMainWindow ONLY (createAsciiWindow/createTableWindow are DEAD)
+│   └── state.js          # window state persistence
+├── word-template/
+│   ├── index.js          # WordTemplateExporter facade
+│   ├── parser.js         # .dotx parsing
+│   ├── converter.js      # markdown → docx
+│   └── apply.js          # apply template styles to converted docx
+└── utils/
+    ├── paths.js          # path helpers
+    ├── logger.js         # structured logging
+    └── download.js       # tool downloader
+```
+
+**Module rules:**
+- Each file has one clear responsibility (no god files; CLAUDE.md says >300 lines is the cap)
+- `index.js` is the public face of a folder; deeper files are private
+- `src/main/index.js` (top-level) wires everything together
+- Cross-folder imports go through `index.js`, not directly to internals
+
+### 2.2 Entry point change
+
+**Before:**
+```json
+// package.json
+"main": "src/main.js"
+```
+
+**After:**
+```json
+// package.json
+"main": "src/main/index.js"
+```
+
+The new `src/main/index.js` runs the same `app.whenReady().then(...)` flow that the current `src/main.js` does, but composes the decomposed modules.
+
+### 2.3 What becomes dead code (removed during decomposition)
+
+When the legacy renderer files are deleted, these main-process functions become orphaned and are removed too:
+
+| Function | File | Why dead |
+|---|---|---|
+| `createAsciiWindow()` | `src/main/window/index.js` | Loads deleted `src/ascii-generator.html` |
+| `createTableWindow()` | `src/main/window/index.js` | Loads deleted `src/table-generator.html` |
+| `ipcMain.on('open-ascii-generator', ...)` | `src/main/index.js` (after decomposition) | Replaced by React `<AsciiGeneratorDialog>` |
+| `ipcMain.on('open-table-generator', ...)` | `src/main/index.js` (after decomposition) | Replaced by React `<TableGeneratorDialog>` |
+| `webContents.send('print-preview')` | `src/main/menu/items.js` | Replaced by React `<PrintPreview>` |
+| `webContents.send('print-preview-styled')` | `src/main/menu/items.js` | Replaced by React `<PrintPreview>` |
+| `webContents.send('toggle-command-palette')` | `src/main/menu/items.js` | Replaced by `useCommandStore` |
+| `require('./wordTemplateExporter')` | `src/main/index.js` (after decomposition) | Replaced by `src/main/word-template/` + renderer-side `lib/docx-export.ts` |
+
+---
+
+## 3. Legacy Deletion Map
+
+### 3.1 Files to delete from `src/` (12 files, ~14,426 lines)
+
+| File | Size | Lines | Replaced by |
+|---|---|---|---|
+| `src/renderer.js` | 213KB | 5319 | `src/renderer/` (Phases 1-9) |
+| `src/styles.css` | 74KB | 3723 | `src/renderer/index.css` + Tailwind |
+| `src/styles-modern.css` | 71KB | 2625 | Tailwind + shadcn/ui |
+| `src/styles-concreteinfo.css` | 21KB | 969 | Tailwind theme tokens |
+| `src/styles-sidebar.css` | 9.7KB | 304 | `<Sidebar>` component |
+| `src/styles-zen.css` | 2.1KB | 102 | Zen mode in AppShell |
+| `src/styles-welcome.css` | 2.2KB | 24 | Welcome dialog |
+| `src/fonts.css` | 1.8KB | (imported elsewhere) | Tailwind font config |
+| `src/command-palette.js` | (small) | 109 | `useCommandStore` |
+| `src/print-preview.js` | (small) | 138 | `<PrintPreview>` |
+| `src/welcome.js` | (small) | 78 | `<Welcome>` modal |
+| `src/zen-mode.js` | (small) | 292 | `use-zen-mode` hook + AppShell |
+| `src/wordTemplateExporter.js` | (small) | 743 | `src/main/word-template/` + renderer `lib/docx-export.ts` |
+| `src/ascii-generator.html` | 34KB | (HTML) | `<AsciiGeneratorDialog>` |
+| `src/table-generator.html` | 18KB | (HTML) | `<TableGeneratorDialog>` |
+| `src/index.html` | 103KB | 1667 | `src/renderer/index.html` (already exists, Vite root) |
+
+**Total: 13 files = ~16,093 lines / ~548KB**
+
+`src/renderer/index.html` (the live Vite template) is NOT deleted.
+
+### 3.2 Dead IPC channels to remove from `src/preload.js`
+
+- `toggle-command-palette` (line 238)
+- `open-ascii-generator` (line 89)
+- `open-table-generator` (line 92)
+- `print-preview` (line 173)
+- `print-preview-styled` (line 174)
+- `show-table-generator` (line 180)
+- `show-ascii-generator-window` (line 217)
+- `show-ascii-generator` (line 218)
+- `show-table-generator-window` (line 221)
+
+And from the exposed API surface:
+- `openAscii: () => ipcRenderer.send('open-ascii-generator')` (line 445)
+- `openTable: () => ipcRenderer.send('open-table-generator')` (line 446)
+
+**9 channel names + 2 API entries to remove.**
+
+### 3.3 Legacy references in `src/index.html` (16 places) — **the LEGACY file at project root, 1667 lines**
+
+- `<link rel="stylesheet" href="styles.css">` (line ~6)
+- `<link rel="stylesheet" href="styles-welcome.css">` (line ~7)
+- `<div id="print-preview-overlay" class="modal hidden" ...>` block (~10 lines)
+- `<div class="command-palette-overlay hidden" id="command-palette-overlay">` block (~5 lines)
+- `<script src="renderer.js"></script>` (final script tag)
+
+**All of these are removed by deleting the file `src/index.html` entirely.**
+
+The CURRENT live renderer template is **`src/renderer/index.html`** (already correct: minimal, CSP, Plus Jakarta Sans font, `<script type="module" src="./main.tsx">`). This file is **NOT touched** in Phase 10. Vite's `root` is set to `src/renderer/` in `vite.renderer.config.ts`, so `src/renderer/index.html` is the HTML template Vite uses. The `src/index.html` at the project root is an orphan from the pre-Vite era.
+
+**Verification:** after deleting `src/index.html`, the renderer build still works because Vite doesn't look at the project root — it uses `src/renderer/index.html`.
+
+### 3.4 Main process rewiring
+
+- Remove `require('./wordTemplateExporter')` from main entrypoint
+- Remove `webContents.send('print-preview*')` and `webContents.send('toggle-command-palette')` from menu items
+- Remove `ipcMain.on('open-ascii-generator', ...)` and `ipcMain.on('open-table-generator', ...)` handlers
+- Remove `asciiGeneratorWindow` and `tableGeneratorWindow` global state (and any references to `loadFile(...ascii-generator.html)` / `loadFile(...table-generator.html)`)
+
+---
+
+## 4. `src/index.html` — DELETE (not rewrite)
+
+The current `src/index.html` is 1667 lines of legacy markup and is **DELETED** (not rewritten). The renderer is already correctly served by `src/renderer/index.html` (the Vite root). Deleting the legacy root-level `src/index.html` is the action — no replacement file is needed.
+
+`src/renderer/index.html` (already correct) is NOT modified:
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta http-equiv="Content-Security-Policy" content="default-src 'self'; ...">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>MarkdownConverter</title>
+  <link rel="preconnect" href="https://fonts.googleapis.com">
+  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+  <link href="https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:..." rel="stylesheet">
+</head>
+<body class="font-sans antialiased">
+  <div id="root"></div>
+  <script type="module" src="./main.tsx"></script>
+</body>
+</html>
+```
+
+---
+
+## 5. Version Bump + CHANGELOG
+
+### 5.1 `package.json`
+
+```diff
+-  "version": "4.4.2",
++  "version": "5.0.0",
+```
+
+Major version bump because the legacy renderer removal is a breaking change for anyone who had plugins/integrations pointing at `src/renderer.js`.
+
+### 5.2 `CHANGELOG.md` (new file, Keep a Changelog 1.1.0 format)
+
+```markdown
+# Changelog
+
+All notable changes to markdown-converter will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [5.0.0] - 2026-06-06
+
+### Added
+- **Complete React 19 + Vite + TypeScript renderer** replacing the legacy vanilla-JS UI
+- Native macOS/Windows/Linux menus with command palette and keyboard shortcuts
+- Settings sheet (5 tabs: editor, theme, keybindings, advanced, about)
+- Modal layer with 13 modal kinds (export PDF/DOCX/HTML/Word, batch, settings, about, welcome, confirm, ASCII gen, table gen, find in files)
+- 10 advanced tools: ASCII generator, table generator, Word export, find-in-files, REPL, print preview, zen mode, minimap, breadcrumbs-with-symbols, git status
+- Sonner toast notifications at 4 wire points
+- 3 mount strategies: ModalLayer dialogs, App.tsx overlays, editor/sidebar integrations
+- `ipc.file.writeBuffer` for renderer-side binary output
+- `ipc.file.search` (recursive regex), `ipc.file.gitStatus`, `ipc.print.show`, `ipc.app.showSaveDialog`
+- 305 unit + integration tests (vitest + React Testing Library)
+- Per-package @radix-ui primitives
+- shadcn/ui (new-york style) primitives
+
+### Changed
+- **BREAKING**: Renderer is now React-only.
+- Main process decomposed from 146KB `src/main.js` into feature-first modules under `src/main/`
+- `src/index.html` reduced from 1667 to ~50 lines
+- IPC contract: handlers throw, `safeCall` catches → `{ ok, error }`
+- Settings store: `useSettingsStore` (zustand persist with zod)
+- Modal state: `useAppStore.modal: ModalState` discriminated union
+
+### Removed
+- `src/renderer.js` (legacy vanilla-JS renderer, 5319 lines) — and `src/index.html` (1667 lines of legacy markup, replaced by `src/renderer/index.html` which is already the live Vite template)
+- 7 legacy stylesheets (styles.css, styles-modern.css, styles-concreteinfo.css, styles-sidebar.css, styles-zen.css, styles-welcome.css, fonts.css)
+- 5 legacy scripts (command-palette.js, print-preview.js, welcome.js, zen-mode.js, wordTemplateExporter.js)
+- 2 legacy HTMLs (ascii-generator.html, table-generator.html)
+- 9 dead IPC channels (toggle-command-palette, open-*/show-* ascii/table, print-preview*)
+```
+
+---
+
+## 6. Task Decomposition
+
+**10 tasks** (each independently verifiable, one feature per commit, no bundling):
+
+1. **Decompose main.js — `src/main/files/`** (file ops facade, search, git, binary)
+2. **Decompose main.js — `src/main/menu/`** (buildMenu + items, with dead sends removed)
+3. **Decompose main.js — `src/main/window/`** (createMainWindow ONLY — ascii/table windows removed)
+4. **Decompose main.js — `src/main/word-template/`** (WordTemplateExporter split into parser/converter/apply)
+5. **Decompose main.js — `src/main/utils/` + `store.js` + `ipc.js` + `index.js`** (glue + new entrypoint)
+6. **Trim preload.js** — remove 9 dead IPC channels + 2 exposed API entries
+7. **Delete legacy renderer files** (13 files: renderer.js, 7 styles, fonts.css, 4 scripts, 3 htmls)
+8. **Verify src/renderer/index.html is the live template** (no action needed if it's already correct)
+9. **Bump package.json version to 5.0.0 + write CHANGELOG.md**
+10. **Final verification + tag v5.0.0** (build, tests, grep, electron smoke)
+
+Tasks 1-5 are subagent-driven (decomposition is mechanical given a clear target structure). Tasks 6-9 are direct edits. Task 10 is a verification gate.
+
+---
+
+## 7. Verification Strategy
+
+**Per task:**
+- After each decomposition step: `npx vitest run` (305 still green)
+- After main.js decomposition: `npx electron .` smoke — app starts, opens a file
+- After deletions: `git grep -E "renderer\.js|command-palette|print-preview|welcome\.js|zen-mode|wordTemplate|ascii-generator|table-generator|styles\.css"` returns ZERO results
+
+**Final (Task 10):**
+- `npx vitest run` — 305 passing
+- `npx vite build --config vite.renderer.config.ts` — succeeds
+- `npx vite build --config vite.preload.config.ts` — succeeds
+- `npx electron .` — app launches, main window renders
+- Manual smoke: open a `.md` file, edit it, export to PDF/DOCX, use the command palette
+- `git tag -a v5.0.0 -m "..."` and `git push origin v5.0.0`
+
+---
+
+## 8. Risks & Open Questions
+
+**Risks:**
+- **Decomposition regressions.** Splitting a 146KB main.js into 7+ files has surface area for missed imports / circular deps. Mitigation: tests stay green; electron smoke after each step.
+- **Hidden legacy references.** `git grep` won't catch references inside minified bundles or in node_modules. Mitigation: vite build will fail if there's a dangling import.
+- **`src/main/index.js` entrypoint change.** Anything in the build pipeline (electron-builder, scripts) that hardcodes `src/main.js` needs to be updated. Mitigation: grep all of `package.json`, `scripts/`, `vite.*.config.ts` for `main.js`.
+
+**Open questions (resolved during brainstorming):**
+- ~~Main process scope~~ → Full rewrite
+- ~~Folder shape~~ → Feature-first
+- ~~IPC migration~~ → Delete dead channels
+- ~~Version strategy~~ → v5.0.0 with Keep a Changelog format
+- ~~Order of work~~ → Decompose first, delete last
+
+---
+
+## 9. Out of Scope (deferred to Phase 11+)
+
+- Main process test suite
+- Renderer-side further refactor
+- New features
+- Migration to tauri (separate plan in `docs/plans/2026-03-15-react-tauri-pwa.md`)
+
+---
+
+## 10. Success Criteria
+
+Phase 10 is complete when:
+- All 10 tasks are committed, one per commit, no bundling
+- `src/main/index.js` is the new entrypoint
+- All 12 legacy files are deleted
+- All 9 dead IPC channels are removed
+- `package.json#version` is `5.0.0`, `package.json#main` is `src/main/index.js`
+- `CHANGELOG.md` exists with a complete v5.0.0 entry
+- 305 tests still pass
+- `npx vite build` succeeds for both renderer and preload configs
+- `npx electron .` launches and the app works end-to-end
+- `git grep` for legacy references returns zero results
+- Tag `v5.0.0` is created and pushed to origin
+- Phase 10 is the LAST phase of the React UI redesign

eslint.config.js

@@ -75,6 +75,7 @@ module.exports = [
         jest: 'readonly',
         describe: 'readonly',
         test: 'readonly',
+        it: 'readonly',
         expect: 'readonly',
         beforeEach: 'readonly',
         afterEach: 'readonly',

jest.config.js

@@ -19,8 +19,7 @@ module.exports = {
   // Coverage configuration
   collectCoverageFrom: [
     'src/**/*.js',
-    '!src/main.js', // Main process needs electron-mock
-    '!src/renderer.js', // Large renderer file with duplicate declarations
+    '!src/main/**', // Main process needs electron-mock
     '!src/preload.js', // Electron preload requires contextBridge
     '!**/node_modules/**'
   ],

package.json

@@ -1,13 +1,16 @@
 {
   "name": "markdown-converter",
-  "version": "4.3.0",
+  "version": "5.0.0",
   "description": "Professional Markdown editor and universal file converter with PDF editing, batch processing, and syntax highlighting",
-  "main": "src/main.js",
+  "main": "src/main/index.js",
   "scripts": {
     "start": "electron .",
     "test": "jest",
     "test:watch": "jest --watch",
     "test:coverage": "jest --coverage",
+    "test:renderer": "vitest run",
+    "test:renderer:watch": "vitest",
+    "test:renderer:coverage": "vitest run --coverage",
     "lint": "eslint src tests",
     "lint:fix": "eslint src tests --fix",
     "format": "prettier --write src tests",
@@ -43,7 +46,20 @@
     "url": "https://github.com/amitwh/markdown-converter"
   },
   "devDependencies": {
+    "@playwright/test": "^1.60.0",
     "@testing-library/dom": "^10.4.1",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
+    "@types/figlet": "^1.7.0",
+    "@types/node": "^25.9.1",
+    "@types/react": "^19.2.16",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^6.0.2",
+    "@vitest/ui": "^4.1.8",
+    "autoprefixer": "^10.5.0",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
     "cross-env": "^10.0.0",
     "electron": "^41.1.1",
     "electron-builder": "^26.0.12",
@@ -52,8 +68,17 @@
     "eslint-plugin-prettier": "^5.5.4",
     "jest": "^30.2.0",
     "jest-environment-jsdom": "^30.2.0",
+    "jsdom": "^29.1.1",
+    "lucide-react": "^1.17.0",
+    "postcss": "^8.5.15",
     "prettier": "^3.7.4",
-    "sharp": "^0.34.3"
+    "sharp": "^0.34.3",
+    "tailwind-merge": "^3.6.0",
+    "tailwindcss": "^3.4.19",
+    "tailwindcss-animate": "^1.0.7",
+    "typescript": "^6.0.3",
+    "vite": "^8.0.16",
+    "vitest": "^4.1.8"
   },
   "dependencies": {
     "@codemirror/autocomplete": "^6.20.1",
@@ -70,25 +95,53 @@
     "@codemirror/state": "^6.5.4",
     "@codemirror/theme-one-dark": "^6.1.3",
     "@codemirror/view": "^6.39.16",
+    "@dnd-kit/core": "^6.3.1",
+    "@dnd-kit/sortable": "^10.0.0",
+    "@dnd-kit/utilities": "^3.2.2",
+    "@hookform/resolvers": "^5.4.0",
+    "@radix-ui/react-checkbox": "^1.3.3",
+    "@radix-ui/react-collapsible": "^1.1.12",
+    "@radix-ui/react-context-menu": "^2.2.16",
+    "@radix-ui/react-dialog": "^1.1.15",
+    "@radix-ui/react-label": "^2.1.8",
+    "@radix-ui/react-radio-group": "^1.3.8",
+    "@radix-ui/react-scroll-area": "^1.2.10",
+    "@radix-ui/react-select": "^2.2.6",
+    "@radix-ui/react-slider": "^1.3.6",
+    "@radix-ui/react-slot": "^1.2.4",
+    "@radix-ui/react-switch": "^1.2.6",
+    "@radix-ui/react-tabs": "^1.1.13",
+    "@tanstack/react-table": "^8.21.3",
     "codemirror": "^6.0.2",
     "core-util-is": "^1.0.3",
-    "docx": "^9.6.0",
-    "docx4js": "^3.3.0",
+    "docx": "^9.7.1",
+    "docx4js": "^2.0.1",
     "dompurify": "^3.3.1",
     "electron-store": "^10.1.0",
     "ffmpeg-static": "^5.3.0",
+    "figlet": "^1.11.0",
     "highlight.js": "^11.11.1",
     "html2pdf.js": "^0.14.0",
+    "immer": "^11.1.8",
     "marked": "^17.0.3",
     "marked-footnote": "^1.4.0",
     "marked-highlight": "^2.2.3",
     "mermaid": "^11.12.3",
+    "motion": "^12.40.0",
+    "next-themes": "^0.4.6",
     "pdf-lib": "^1.17.1",
     "pdfjs-dist": "^5.5.207",
     "pdfkit": "^0.17.2",
     "pizzip": "^3.2.0",
+    "react": "^19.2.7",
+    "react-dom": "^19.2.7",
+    "react-hook-form": "^7.77.0",
+    "react-resizable-panels": "^4.11.2",
     "simple-git": "^3.32.3",
-    "tslib": "^2.8.1"
+    "sonner": "^2.0.7",
+    "tslib": "^2.8.1",
+    "zod": "^4.4.3",
+    "zustand": "^5.0.14"
   },
   "overrides": {
     "jszip": "^3.10.1",
@@ -170,7 +223,10 @@
       "verifyUpdateCodeSignature": false,
       "signAndEditExecutable": false,
       "extraFiles": [
-        { "from": "bin/win32/pandoc.exe", "to": "bin/pandoc.exe" }
+        {
+          "from": "bin/win32/pandoc.exe",
+          "to": "bin/pandoc.exe"
+        }
       ]
     },
     "nsis": {
@@ -198,7 +254,10 @@
       "category": "Utility",
       "maintainer": "ConcreteInfo <amit.wh@gmail.com>",
       "extraFiles": [
-        { "from": "bin/linux/pandoc", "to": "bin/pandoc" }
+        {
+          "from": "bin/linux/pandoc",
+          "to": "bin/pandoc"
+        }
       ]
     },
     "deb": {

postcss.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+}

src/adapters/electron/fs.js

@@ -4,7 +4,7 @@
  * Implements file system operations for Electron using IPC.
  * This abstracts file operations to enable easier testing and migration.
  *
- * @version 4.1.0
+ * @version 4.4.1
  */
 
 /**

src/adapters/types.js

@@ -5,7 +5,7 @@
  * Adapters abstract file system, conversion, and system operations
  * to enable easier testing and future platform migration.
  *
- * @version 4.1.0
+ * @version 4.4.1
  */
 
 /**

src/ascii-generator.html

@@ -1,601 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>ASCII Art Generator - MarkdownConverter</title>
-    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap" rel="stylesheet">
-    <style>
-        :root {
-            --ci-dark-gray: #464646;
-            --ci-medium-gray: #9a9696;
-            --ci-accent: #e5461f;
-            --ci-light-gray: #e3e3e3;
-            --ci-black: #0d0b09;
-            --ci-white: #ffffff;
-            --ci-bg: #f5f5f5;
-        }
-
-        * {
-            margin: 0;
-            padding: 0;
-            box-sizing: border-box;
-        }
-
-        body {
-            font-family: 'Inter', system-ui, sans-serif;
-            background: var(--ci-bg);
-            color: var(--ci-dark-gray);
-            min-height: 100vh;
-        }
-
-        .header {
-            background: linear-gradient(135deg, var(--ci-dark-gray) 0%, var(--ci-black) 100%);
-            padding: 16px 24px;
-            border-bottom: 3px solid var(--ci-accent);
-            display: flex;
-            align-items: center;
-            justify-content: space-between;
-        }
-
-        .header h1 {
-            color: var(--ci-white);
-            font-size: 1.25rem;
-            font-weight: 600;
-        }
-
-        .container {
-            padding: 24px;
-            max-width: 100%;
-        }
-
-        .section {
-            background: var(--ci-white);
-            border-radius: 12px;
-            padding: 20px;
-            margin-bottom: 20px;
-            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
-        }
-
-        .section-title {
-            font-weight: 600;
-            margin-bottom: 16px;
-            color: var(--ci-dark-gray);
-            font-size: 0.95rem;
-        }
-
-        .mode-tabs {
-            display: flex;
-            gap: 8px;
-            margin-bottom: 20px;
-        }
-
-        .mode-tab {
-            padding: 10px 20px;
-            border: 2px solid var(--ci-light-gray);
-            background: var(--ci-white);
-            border-radius: 8px;
-            font-size: 0.875rem;
-            font-weight: 500;
-            cursor: pointer;
-            transition: all 0.2s;
-        }
-
-        .mode-tab:hover {
-            border-color: var(--ci-accent);
-        }
-
-        .mode-tab.active {
-            background: var(--ci-accent);
-            border-color: var(--ci-accent);
-            color: var(--ci-white);
-        }
-
-        .form-group {
-            margin-bottom: 16px;
-        }
-
-        .form-label {
-            display: block;
-            font-size: 0.875rem;
-            font-weight: 500;
-            margin-bottom: 8px;
-            color: var(--ci-dark-gray);
-        }
-
-        .form-input, .form-select, .form-textarea {
-            width: 100%;
-            padding: 10px 14px;
-            border: 2px solid var(--ci-light-gray);
-            border-radius: 8px;
-            font-size: 0.875rem;
-            font-family: inherit;
-            transition: border-color 0.2s;
-        }
-
-        .form-input:focus, .form-select:focus, .form-textarea:focus {
-            outline: none;
-            border-color: var(--ci-accent);
-        }
-
-        .form-textarea {
-            min-height: 80px;
-            resize: vertical;
-        }
-
-        .preview-container {
-            background: var(--ci-black);
-            border-radius: 8px;
-            padding: 16px;
-            min-height: 200px;
-            max-height: 350px;
-            overflow: auto;
-        }
-
-        .preview-content {
-            font-family: 'JetBrains Mono', monospace;
-            font-size: 12px;
-            line-height: 1.3;
-            color: #00ff00;
-            white-space: pre;
-        }
-
-        .template-grid {
-            display: grid;
-            grid-template-columns: repeat(4, 1fr);
-            gap: 8px;
-            margin-bottom: 16px;
-        }
-
-        .template-btn {
-            padding: 8px 12px;
-            border: 2px solid var(--ci-light-gray);
-            background: var(--ci-white);
-            border-radius: 6px;
-            font-size: 0.75rem;
-            cursor: pointer;
-            transition: all 0.2s;
-        }
-
-        .template-btn:hover {
-            border-color: var(--ci-accent);
-            background: rgba(229, 70, 31, 0.05);
-        }
-
-        .template-btn.active {
-            border-color: var(--ci-accent);
-            background: rgba(229, 70, 31, 0.1);
-        }
-
-        .footer {
-            display: flex;
-            justify-content: flex-end;
-            gap: 12px;
-            padding: 16px 24px;
-            background: var(--ci-white);
-            border-top: 1px solid var(--ci-light-gray);
-            position: sticky;
-            bottom: 0;
-        }
-
-        .btn {
-            padding: 10px 24px;
-            border-radius: 8px;
-            font-size: 0.875rem;
-            font-weight: 500;
-            cursor: pointer;
-            transition: all 0.2s;
-            border: none;
-        }
-
-        .btn-primary {
-            background: var(--ci-accent);
-            color: var(--ci-white);
-        }
-
-        .btn-primary:hover {
-            background: #c93a18;
-            transform: translateY(-1px);
-        }
-
-        .btn-secondary {
-            background: var(--ci-light-gray);
-            color: var(--ci-dark-gray);
-        }
-
-        .btn-secondary:hover {
-            background: #d0d0d0;
-        }
-
-        .mode-section {
-            display: none;
-        }
-
-        .mode-section.active {
-            display: block;
-        }
-
-        .template-category {
-            margin-bottom: 16px;
-        }
-
-        .template-category-title {
-            font-size: 0.8rem;
-            color: var(--ci-medium-gray);
-            margin-bottom: 8px;
-            text-transform: uppercase;
-            letter-spacing: 0.05em;
-        }
-    </style>
-</head>
-<body>
-    <div class="header">
-        <h1>ASCII Art Generator</h1>
-    </div>
-
-    <div class="container">
-        <div class="section">
-            <div class="mode-tabs">
-                <button class="mode-tab active" data-mode="text">Text Banner</button>
-                <button class="mode-tab" data-mode="box">Box/Frame</button>
-                <button class="mode-tab" data-mode="templates">Templates</button>
-            </div>
-
-            <!-- Text Banner Mode -->
-            <div id="text-mode" class="mode-section active">
-                <div class="form-group">
-                    <label class="form-label">Text to Convert</label>
-                    <input type="text" id="text-input" class="form-input" placeholder="Enter your text..." maxlength="30">
-                </div>
-                <div class="form-group">
-                    <label class="form-label">Style</label>
-                    <select id="font-style" class="form-select">
-                        <option value="standard">Standard</option>
-                        <option value="banner">Banner</option>
-                        <option value="block">Block</option>
-                        <option value="bubble">Bubble</option>
-                        <option value="digital">Digital</option>
-                    </select>
-                </div>
-            </div>
-
-            <!-- Box/Frame Mode -->
-            <div id="box-mode" class="mode-section">
-                <div class="form-group">
-                    <label class="form-label">Text Content</label>
-                    <textarea id="box-text" class="form-textarea" placeholder="Enter text for the box..."></textarea>
-                </div>
-                <div class="form-group">
-                    <label class="form-label">Box Style</label>
-                    <select id="box-style" class="form-select">
-                        <option value="single">Single Line</option>
-                        <option value="double">Double Line</option>
-                        <option value="rounded">Rounded</option>
-                        <option value="bold">Bold</option>
-                        <option value="ascii">ASCII (+|-)</option>
-                    </select>
-                </div>
-                <div class="form-group">
-                    <label class="form-label">Padding</label>
-                    <input type="number" id="box-padding" class="form-input" min="0" max="10" value="2" style="width: 100px;">
-                </div>
-            </div>
-
-            <!-- Templates Mode -->
-            <div id="templates-mode" class="mode-section">
-                <div class="template-category">
-                    <div class="template-category-title">Arrows & Flow</div>
-                    <div class="template-grid">
-                        <button class="template-btn" data-template="arrow-right">Arrow Right</button>
-                        <button class="template-btn" data-template="arrow-down">Arrow Down</button>
-                        <button class="template-btn" data-template="decision">Decision</button>
-                        <button class="template-btn" data-template="process">Process Flow</button>
-                    </div>
-                </div>
-                <div class="template-category">
-                    <div class="template-category-title">Diagrams</div>
-                    <div class="template-grid">
-                        <button class="template-btn" data-template="flowchart">Flowchart</button>
-                        <button class="template-btn" data-template="sequence">Sequence</button>
-                        <button class="template-btn" data-template="network">Network</button>
-                        <button class="template-btn" data-template="hierarchy">Hierarchy</button>
-                    </div>
-                </div>
-                <div class="template-category">
-                    <div class="template-category-title">Boxes & Containers</div>
-                    <div class="template-grid">
-                        <button class="template-btn" data-template="header">Header</button>
-                        <button class="template-btn" data-template="note">Note Box</button>
-                        <button class="template-btn" data-template="warning">Warning</button>
-                        <button class="template-btn" data-template="info">Info Box</button>
-                    </div>
-                </div>
-                <div class="template-category">
-                    <div class="template-category-title">Decorative</div>
-                    <div class="template-grid">
-                        <button class="template-btn" data-template="divider">Divider</button>
-                        <button class="template-btn" data-template="separator">Separator</button>
-                        <button class="template-btn" data-template="banner">Banner</button>
-                        <button class="template-btn" data-template="checklist">Checklist</button>
-                    </div>
-                </div>
-            </div>
-        </div>
-
-        <div class="section">
-            <div class="section-title">Preview</div>
-            <div class="preview-container">
-                <div id="preview" class="preview-content"></div>
-            </div>
-        </div>
-    </div>
-
-    <div class="footer">
-        <button class="btn btn-secondary" id="btn-generate">Generate Preview</button>
-        <button class="btn btn-primary" id="btn-insert">Insert to Editor</button>
-    </div>
-
-    <script>
-        // ASCII Art Generator Logic
-        const FONTS = {
-            standard: {
-                height: 5,
-                chars: {
-                    'A': ['  /\\  ', ' /  \\ ', '/----\\', '|    |', '|    |'],
-                    'B': ['|----\\', '|    |', '|----/', '|    \\', '|----/'],
-                    'C': ['/----\\', '|     ', '|     ', '|     ', '\\----/'],
-                    'D': ['|----\\', '|    |', '|    |', '|    |', '|----/'],
-                    'E': ['|----', '|    ', '|--- ', '|    ', '|----'],
-                    'F': ['|----', '|    ', '|--- ', '|    ', '|    '],
-                    'G': ['/----\\', '|     ', '| |--\\', '|    |', '\\----/'],
-                    'H': ['|    |', '|    |', '|----/', '|    |', '|    |'],
-                    'I': ['|---|', '  |  ', '  |  ', '  |  ', '|---|'],
-                    'J': ['    |', '    |', '    |', '|   |', '\\---/'],
-                    'K': ['|   /', '|  / ', '|--  ', '|  \\ ', '|   \\'],
-                    'L': ['|    ', '|    ', '|    ', '|    ', '|----'],
-                    'M': ['|\\  /|', '| \\/ |', '|    |', '|    |', '|    |'],
-                    'N': ['|\\   |', '| \\  |', '|  \\ |', '|   \\|', '|    |'],
-                    'O': ['/----\\', '|    |', '|    |', '|    |', '\\----/'],
-                    'P': ['|----\\', '|    |', '|----/', '|     ', '|     '],
-                    'Q': ['/----\\', '|    |', '|  \\ |', '|   \\|', '\\----\\'],
-                    'R': ['|----\\', '|    |', '|----/', '|  \\  ', '|   \\ '],
-                    'S': ['/----\\', '|     ', '\\----\\', '     |', '\\----/'],
-                    'T': ['-----', '  |  ', '  |  ', '  |  ', '  |  '],
-                    'U': ['|    |', '|    |', '|    |', '|    |', '\\----/'],
-                    'V': ['|    |', '|    |', ' \\  / ', '  \\/  ', '      '],
-                    'W': ['|    |', '|    |', '|    |', '| /\\ |', '|/  \\|'],
-                    'X': ['\\    /', ' \\  / ', '  \\/  ', '  /\\  ', ' /  \\ '],
-                    'Y': ['\\   /', ' \\ / ', '  |  ', '  |  ', '  |  '],
-                    'Z': ['-----', '   / ', '  /  ', ' /   ', '-----'],
-                    ' ': ['     ', '     ', '     ', '     ', '     '],
-                    '0': ['/---\\', '|   |', '| / |', '|/  |', '\\---/'],
-                    '1': ['  /| ', ' / | ', '   | ', '   | ', ' ----'],
-                    '2': ['/---\\', '    |', ' ---/', '/    ', '-----'],
-                    '3': ['----\\', '    |', ' ---/', '    |', '----/'],
-                    '4': ['|   |', '|   |', '-----', '    |', '    |'],
-                    '5': ['-----', '|    ', '----\\', '    |', '----/'],
-                    '6': ['/----', '|    ', '|---\\', '|   |', '\\---/'],
-                    '7': ['-----', '   / ', '  /  ', ' /   ', '/    '],
-                    '8': ['/---\\', '|   |', ' --- ', '|   |', '\\---/'],
-                    '9': ['/---\\', '|   |', '\\----', '    |', '----/']
-                }
-            },
-            banner: {
-                height: 7,
-                chars: {
-                    'A': [' ##### ', ' ##   ##', '##     ##', '#########', '##     ##', '##     ##', '##     ##'],
-                    'B': ['######## ', '##     ##', '##     ##', '######## ', '##     ##', '##     ##', '######## '],
-                    'C': [' ###### ', '##    ##', '##      ', '##      ', '##      ', '##    ##', ' ###### '],
-                    'D': ['######## ', '##     ##', '##     ##', '##     ##', '##     ##', '##     ##', '######## '],
-                    'E': ['########', '##      ', '##      ', '###### ', '##      ', '##      ', '########'],
-                    'F': ['########', '##      ', '##      ', '###### ', '##      ', '##      ', '##      '],
-                    'G': [' ###### ', '##    ##', '##      ', '##  ####', '##    ##', '##    ##', ' ###### '],
-                    'H': ['##     ##', '##     ##', '##     ##', '#########', '##     ##', '##     ##', '##     ##'],
-                    'I': ['####', ' ## ', ' ## ', ' ## ', ' ## ', ' ## ', '####'],
-                    'J': ['      ##', '      ##', '      ##', '      ##', '##    ##', '##    ##', ' ###### '],
-                    'K': ['##    ##', '##   ## ', '##  ##  ', '#####   ', '##  ##  ', '##   ## ', '##    ##'],
-                    'L': ['##      ', '##      ', '##      ', '##      ', '##      ', '##      ', '########'],
-                    'M': ['##     ##', '###   ###', '#### ####', '## ### ##', '##     ##', '##     ##', '##     ##'],
-                    'N': ['##    ##', '###   ##', '####  ##', '## ## ##', '##  ####', '##   ###', '##    ##'],
-                    'O': [' ####### ', '##     ##', '##     ##', '##     ##', '##     ##', '##     ##', ' ####### '],
-                    'P': ['######## ', '##     ##', '##     ##', '######## ', '##       ', '##       ', '##       '],
-                    'Q': [' ####### ', '##     ##', '##     ##', '##     ##', '##  ## ##', '##    ## ', ' ##### ##'],
-                    'R': ['######## ', '##     ##', '##     ##', '######## ', '##   ##  ', '##    ## ', '##     ##'],
-                    'S': [' ###### ', '##    ##', '##      ', ' ###### ', '      ##', '##    ##', ' ###### '],
-                    'T': ['########', '   ##   ', '   ##   ', '   ##   ', '   ##   ', '   ##   ', '   ##   '],
-                    'U': ['##     ##', '##     ##', '##     ##', '##     ##', '##     ##', '##     ##', ' ####### '],
-                    'V': ['##     ##', '##     ##', '##     ##', '##     ##', ' ##   ## ', '  ## ##  ', '   ###   '],
-                    'W': ['##      ##', '##  ##  ##', '##  ##  ##', '##  ##  ##', '##  ##  ##', '##  ##  ##', ' ###  ### '],
-                    'X': ['##     ##', ' ##   ## ', '  ## ##  ', '   ###   ', '  ## ##  ', ' ##   ## ', '##     ##'],
-                    'Y': ['##    ##', ' ##  ## ', '  ####  ', '   ##   ', '   ##   ', '   ##   ', '   ##   '],
-                    'Z': ['########', '     ## ', '    ##  ', '   ##   ', '  ##    ', ' ##     ', '########'],
-                    ' ': ['       ', '       ', '       ', '       ', '       ', '       ', '       '],
-                    '0': [' ###### ', '##    ##', '##    ##', '##    ##', '##    ##', '##    ##', ' ###### '],
-                    '1': ['   ##   ', ' ####   ', '   ##   ', '   ##   ', '   ##   ', '   ##   ', ' ###### '],
-                    '2': [' ###### ', '##    ##', '     ## ', '   ##   ', '  ##    ', ' ##     ', '########'],
-                    '3': [' ###### ', '##    ##', '     ## ', '  ####  ', '     ## ', '##    ##', ' ###### '],
-                    '4': ['    ##  ', '   ###  ', '  # ##  ', ' #  ##  ', '########', '    ##  ', '    ##  '],
-                    '5': ['########', '##      ', '####### ', '      ##', '      ##', '##    ##', ' ###### '],
-                    '6': [' ###### ', '##      ', '####### ', '##    ##', '##    ##', '##    ##', ' ###### '],
-                    '7': ['########', '##   ## ', '    ##  ', '   ##   ', '  ##    ', '  ##    ', '  ##    '],
-                    '8': [' ###### ', '##    ##', '##    ##', ' ###### ', '##    ##', '##    ##', ' ###### '],
-                    '9': [' ###### ', '##    ##', '##    ##', ' #######', '      ##', '##    ##', ' ###### ']
-                }
-            },
-            block: {
-                height: 6,
-                chars: {
-                    'A': ['█████╗ ', '██╔══██╗', '███████║', '██╔══██║', '██║  ██║', '╚═╝  ╚═╝'],
-                    'B': ['██████╗ ', '██╔══██╗', '██████╔╝', '██╔══██╗', '██████╔╝', '╚═════╝ '],
-                    'C': ['█████╗ ', '██╔══██╗', '██║     ', '██║     ', '╚█████╔╝', ' ╚════╝ '],
-                    'D': ['██████╗ ', '██╔══██╗', '██║  ██║', '██║  ██║', '██████╔╝', '╚═════╝ '],
-                    'E': ['███████╗', '██╔════╝', '█████╗  ', '██╔══╝  ', '███████╗', '╚══════╝'],
-                    'F': ['███████╗', '██╔════╝', '█████╗  ', '██╔══╝  ', '██║     ', '╚═╝     '],
-                    'G': ['█████╗ ', '██╔══██╗', '██║  ███', '██║   ██', '╚█████╔╝', ' ╚════╝ '],
-                    'H': ['██╗  ██╗', '██║  ██║', '███████║', '██╔══██║', '██║  ██║', '╚═╝  ╚═╝'],
-                    'I': ['██╗', '██║', '██║', '██║', '██║', '╚═╝'],
-                    'J': ['    ██╗', '    ██║', '    ██║', '██  ██║', '╚████╔╝', ' ╚═══╝ '],
-                    'K': ['██╗  ██╗', '██║ ██╔╝', '█████╔╝ ', '██╔═██╗ ', '██║  ██╗', '╚═╝  ╚═╝'],
-                    'L': ['██╗     ', '██║     ', '██║     ', '██║     ', '███████╗', '╚══════╝'],
-                    'M': ['███╗   ███╗', '████╗ ████║', '██╔████╔██║', '██║╚██╔╝██║', '██║ ╚═╝ ██║', '╚═╝     ╚═╝'],
-                    'N': ['███╗   ██╗', '████╗  ██║', '██╔██╗ ██║', '██║╚██╗██║', '██║ ╚████║', '╚═╝  ╚═══╝'],
-                    'O': ['█████╗ ', '██╔══██╗', '██║  ██║', '██║  ██║', '╚█████╔╝', ' ╚════╝ '],
-                    'P': ['██████╗ ', '██╔══██╗', '██████╔╝', '██╔═══╝ ', '██║     ', '╚═╝     '],
-                    'Q': ['█████╗ ', '██╔══██╗', '██║  ██║', '██║  ██║', '╚██████╗', ' ╚═══██╝'],
-                    'R': ['██████╗ ', '██╔══██╗', '██████╔╝', '██╔══██╗', '██║  ██║', '╚═╝  ╚═╝'],
-                    'S': ['█████╗ ', '██╔══╝ ', '█████╗ ', '╚══██║ ', '█████║ ', '╚════╝ '],
-                    'T': ['████████╗', '╚══██╔══╝', '   ██║   ', '   ██║   ', '   ██║   ', '   ╚═╝   '],
-                    'U': ['██╗  ██╗', '██║  ██║', '██║  ██║', '██║  ██║', '╚█████╔╝', ' ╚════╝ '],
-                    'V': ['██╗   ██╗', '██║   ██║', '██║   ██║', '╚██╗ ██╔╝', ' ╚████╔╝ ', '  ╚═══╝  '],
-                    'W': ['██╗    ██╗', '██║    ██║', '██║ █╗ ██║', '██║███╗██║', '╚███╔███╔╝', ' ╚══╝╚══╝ '],
-                    'X': ['██╗  ██╗', '╚██╗██╔╝', ' ╚███╔╝ ', ' ██╔██╗ ', '██╔╝ ██╗', '╚═╝  ╚═╝'],
-                    'Y': ['██╗   ██╗', '╚██╗ ██╔╝', ' ╚████╔╝ ', '  ╚██╔╝  ', '   ██║   ', '   ╚═╝   '],
-                    'Z': ['███████╗', '╚════██║', '  ███╔═╝', ' ██╔══╝ ', '███████╗', '╚══════╝'],
-                    ' ': ['   ', '   ', '   ', '   ', '   ', '   ']
-                }
-            }
-        };
-
-        const TEMPLATES = {
-            'arrow-right': '    ┌─────────────────────┐\n──▶│  Process or Action  │──▶\n    └─────────────────────┘',
-            'arrow-down': '        │\n        ▼\n┌───────────────┐\n│   Process     │\n└───────────────┘\n        │\n        ▼',
-            'decision': '       ╱╲\n      ╱  ╲\n     ╱ ?  ╲\n    ╱      ╲\n   ╱────────╲\n  ╱          ╲\n YES        NO\n  │          │\n  ▼          ▼',
-            'process': '┌─────┐   ┌─────┐   ┌─────┐\n│  1  │──▶│  2  │──▶│  3  │\n└─────┘   └─────┘   └─────┘',
-            'flowchart': '┌─────────────┐\n│   START    │\n└──────┬──────┘\n       │\n       ▼\n┌─────────────┐\n│  Process A  │\n└──────┬──────┘\n       │\n       ▼\n   ╱────────╲\n  ╱ Decision ╲\n  ╲    ?    ╱\n   ╲────────╱\n    │      │\n   YES    NO\n    │      │\n    ▼      ▼\n┌──────┐ ┌──────┐\n│  B   │ │  C   │\n└──────┘ └──────┘',
-            'sequence': ' User      System     Database\n   │           │           │\n   │  Request  │           │\n   ├──────────►│           │\n   │           │  Query    │\n   │           ├──────────►│\n   │           │           │\n   │           │  Result   │\n   │           │◄──────────┤\n   │  Response │           │\n   │◄──────────┤           │\n   │           │           │',
-            'network': '          ┌─────────┐\n          │ Server  │\n          └────┬────┘\n               │\n     ┌─────────┼─────────┐\n     │         │         │\n┌────┴────┐ ┌──┴──┐ ┌────┴────┐\n│ Client1 │ │ DB  │ │ Client2 │\n└─────────┘ └─────┘ └─────────┘',
-            'hierarchy': '            ┌─────────┐\n            │   CEO   │\n            └────┬────┘\n       ┌─────────┼─────────┐\n       │         │         │\n   ┌───┴───┐ ┌───┴───┐ ┌───┴───┐\n   │  VP1  │ │  VP2  │ │  VP3  │\n   └───┬───┘ └───┬───┘ └───┬───┘\n       │         │         │\n   ┌───┴───┐ ┌───┴───┐ ┌───┴───┐\n   │ Team1 │ │ Team2 │ │ Team3 │\n   └───────┘ └───────┘ └───────┘',
-            'header': '╔════════════════════════════════════╗\n║            SECTION TITLE           ║\n╚════════════════════════════════════╝',
-            'note': '┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓\n┃  NOTE:                         ┃\n┃  This is an important note     ┃\n┃  that requires attention!      ┃\n┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛',
-            'warning': '╔════════════════════════════════════╗\n║  ⚠️  WARNING                       ║\n║                                    ║\n║  Critical information here!        ║\n╚════════════════════════════════════╝',
-            'info': '╭────────────────────────────────────╮\n│  ℹ️  INFO                          │\n│                                    │\n│  Helpful information here.         │\n╰────────────────────────────────────╯',
-            'divider': '════════════════════════════════════════',
-            'separator': '╭──────────────────────────────────────╮\n│                                      │\n╰──────────────────────────────────────╯',
-            'banner': '★══════════════════════════════════════★\n║          YOUR TITLE HERE            ║\n★══════════════════════════════════════★',
-            'checklist': '☐ Task 1 - Not completed\n☑ Task 2 - Completed  \n☐ Task 3 - Not completed\n☐ Task 4 - Not completed'
-        };
-
-        const BOX_STYLES = {
-            single: { tl: '┌', tr: '┐', bl: '└', br: '┘', h: '─', v: '│' },
-            double: { tl: '╔', tr: '╗', bl: '╚', br: '╝', h: '═', v: '║' },
-            rounded: { tl: '╭', tr: '╮', bl: '╰', br: '╯', h: '─', v: '│' },
-            bold: { tl: '┏', tr: '┓', bl: '┗', br: '┛', h: '━', v: '┃' },
-            ascii: { tl: '+', tr: '+', bl: '+', br: '+', h: '-', v: '|' }
-        };
-
-        let currentMode = 'text';
-        let currentTemplate = null;
-
-        // Mode switching
-        document.querySelectorAll('.mode-tab').forEach(tab => {
-            tab.addEventListener('click', () => {
-                document.querySelectorAll('.mode-tab').forEach(t => t.classList.remove('active'));
-                tab.classList.add('active');
-                currentMode = tab.dataset.mode;
-
-                document.querySelectorAll('.mode-section').forEach(s => s.classList.remove('active'));
-                document.getElementById(currentMode + '-mode').classList.add('active');
-
-                generatePreview();
-            });
-        });
-
-        // Template selection
-        document.querySelectorAll('.template-btn').forEach(btn => {
-            btn.addEventListener('click', () => {
-                document.querySelectorAll('.template-btn').forEach(b => b.classList.remove('active'));
-                btn.classList.add('active');
-                currentTemplate = btn.dataset.template;
-                generatePreview();
-            });
-        });
-
-        // Generate text banner
-        function generateTextBanner(text, style) {
-            const font = FONTS[style] || FONTS.standard;
-            const lines = Array(font.height).fill('');
-
-            for (const char of text.toUpperCase()) {
-                const charArt = font.chars[char] || font.chars[' '];
-                if (charArt) {
-                    for (let i = 0; i < font.height; i++) {
-                        lines[i] += charArt[i] + ' ';
-                    }
-                }
-            }
-
-            return lines.join('\n');
-        }
-
-        // Generate box
-        function generateBox(text, style, padding) {
-            const box = BOX_STYLES[style] || BOX_STYLES.single;
-            const lines = text.split('\n');
-            const maxLen = Math.max(...lines.map(l => l.length)) + padding * 2;
-
-            let result = box.tl + box.h.repeat(maxLen + 2) + box.tr + '\n';
-
-            // Add padding lines at top
-            for (let i = 0; i < Math.floor(padding / 2); i++) {
-                result += box.v + ' '.repeat(maxLen + 2) + box.v + '\n';
-            }
-
-            // Add text lines
-            for (const line of lines) {
-                const paddedLine = ' '.repeat(padding) + line.padEnd(maxLen - padding) + ' ';
-                result += box.v + ' ' + paddedLine + box.v + '\n';
-            }
-
-            // Add padding lines at bottom
-            for (let i = 0; i < Math.floor(padding / 2); i++) {
-                result += box.v + ' '.repeat(maxLen + 2) + box.v + '\n';
-            }
-
-            result += box.bl + box.h.repeat(maxLen + 2) + box.br;
-            return result;
-        }
-
-        // Generate preview
-        function generatePreview() {
-            let result = '';
-
-            if (currentMode === 'text') {
-                const text = document.getElementById('text-input').value || 'HELLO';
-                const style = document.getElementById('font-style').value;
-                result = generateTextBanner(text, style);
-            } else if (currentMode === 'box') {
-                const text = document.getElementById('box-text').value || 'Your text here';
-                const style = document.getElementById('box-style').value;
-                const padding = parseInt(document.getElementById('box-padding').value) || 2;
-                result = generateBox(text, style, padding);
-            } else if (currentMode === 'templates') {
-                result = currentTemplate ? TEMPLATES[currentTemplate] : 'Select a template...';
-            }
-
-            document.getElementById('preview').textContent = result;
-        }
-
-        // Event listeners for live preview
-        document.getElementById('text-input').addEventListener('input', generatePreview);
-        document.getElementById('font-style').addEventListener('change', generatePreview);
-        document.getElementById('box-text').addEventListener('input', generatePreview);
-        document.getElementById('box-style').addEventListener('change', generatePreview);
-        document.getElementById('box-padding').addEventListener('input', generatePreview);
-
-        document.getElementById('btn-generate').addEventListener('click', generatePreview);
-
-        document.getElementById('btn-insert').addEventListener('click', () => {
-            const content = document.getElementById('preview').textContent;
-            if (content && window.electronAPI) {
-                // Wrap in code block for markdown
-                const wrapped = '```\n' + content + '\n```';
-                window.electronAPI.send('insert-generated-content', wrapped);
-                window.close();
-            }
-        });
-
-        // Initial preview
-        generatePreview();
-    </script>
-</body>
-</html>

src/command-palette.js

@@ -1,109 +0,0 @@
-class CommandPalette {
-    constructor() {
-        this.overlay = document.getElementById('command-palette-overlay');
-        this.input = document.getElementById('command-palette-input');
-        this.results = document.getElementById('command-palette-results');
-        this.commands = [];
-        this.selectedIndex = 0;
-        this.filteredCommands = [];
-        this.setupEventListeners();
-    }
-
-    register(label, shortcut, action) {
-        this.commands.push({ label, shortcut, action });
-    }
-
-    open() {
-        this.overlay.classList.remove('hidden');
-        this.input.value = '';
-        this.input.focus();
-        this.selectedIndex = 0;
-        this.renderResults('');
-    }
-
-    close() {
-        this.overlay.classList.add('hidden');
-    }
-
-    isOpen() {
-        return !this.overlay.classList.contains('hidden');
-    }
-
-    setupEventListeners() {
-        this.input.addEventListener('input', () => {
-            this.selectedIndex = 0;
-            this.renderResults(this.input.value);
-        });
-
-        this.overlay.addEventListener('click', (e) => {
-            if (e.target === this.overlay) this.close();
-        });
-
-        this.input.addEventListener('keydown', (e) => {
-            if (e.key === 'Escape') {
-                e.preventDefault();
-                this.close();
-            } else if (e.key === 'Enter') {
-                e.preventDefault();
-                this.executeSelected();
-            } else if (e.key === 'ArrowDown') {
-                e.preventDefault();
-                this.selectedIndex = Math.min(this.selectedIndex + 1, this.filteredCommands.length - 1);
-                this.updateSelection();
-            } else if (e.key === 'ArrowUp') {
-                e.preventDefault();
-                this.selectedIndex = Math.max(this.selectedIndex - 1, 0);
-                this.updateSelection();
-            }
-        });
-    }
-
-    renderResults(query) {
-        this.filteredCommands = query
-            ? this.commands.filter(cmd => cmd.label.toLowerCase().includes(query.toLowerCase()))
-            : [...this.commands];
-
-        this.results.innerHTML = this.filteredCommands.map((cmd, i) => `
-            <div class="command-item ${i === this.selectedIndex ? 'selected' : ''}" data-index="${i}">
-                <span class="command-label">${this.highlightMatch(cmd.label, query)}</span>
-                ${cmd.shortcut ? `<span class="command-shortcut">${cmd.shortcut}</span>` : ''}
-            </div>
-        `).join('');
-
-        this.results.querySelectorAll('.command-item').forEach((el) => {
-            el.addEventListener('click', () => {
-                const idx = parseInt(el.dataset.index);
-                this.filteredCommands[idx].action();
-                this.close();
-            });
-            el.addEventListener('mouseenter', () => {
-                this.selectedIndex = parseInt(el.dataset.index);
-                this.updateSelection();
-            });
-        });
-    }
-
-    highlightMatch(text, query) {
-        if (!query) return text;
-        const regex = new RegExp(`(${query.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')})`, 'gi');
-        return text.replace(regex, '<strong>$1</strong>');
-    }
-
-    updateSelection() {
-        this.results.querySelectorAll('.command-item').forEach((el, i) => {
-            el.classList.toggle('selected', i === this.selectedIndex);
-        });
-        // Scroll selected into view
-        const selected = this.results.querySelector('.command-item.selected');
-        if (selected) selected.scrollIntoView({ block: 'nearest' });
-    }
-
-    executeSelected() {
-        if (this.filteredCommands[this.selectedIndex]) {
-            this.filteredCommands[this.selectedIndex].action();
-            this.close();
-        }
-    }
-}
-
-module.exports = { CommandPalette };

src/editor/codemirror-setup.js

@@ -59,6 +59,11 @@ const jetBrainsMonoTheme = EditorView.theme({
  * @returns {EditorView} the created editor view
  */
 function createEditor(parentElement, options = {}) {
+  console.log('[createEditor] Called with parentElement:', parentElement?.id, 'dimensions:', parentElement?.clientWidth, 'x', parentElement?.clientHeight);
+  if (!parentElement) {
+    console.error('[createEditor] ERROR: parentElement is null or undefined!');
+    return null;
+  }
   const {
     content = '',
     onChange = () => {},

src/fonts.css

@@ -1,75 +0,0 @@
-/* Local Font Definitions for MarkdownConverter */
-
-/* Inter Font Family */
-@font-face {
-    font-family: 'Inter';
-    font-style: normal;
-    font-weight: 300;
-    font-display: swap;
-    src: url('../assets/fonts/Inter-Light.woff2') format('woff2');
-}
-
-@font-face {
-    font-family: 'Inter';
-    font-style: normal;
-    font-weight: 400;
-    font-display: swap;
-    src: url('../assets/fonts/Inter-Regular.woff2') format('woff2');
-}
-
-@font-face {
-    font-family: 'Inter';
-    font-style: normal;
-    font-weight: 500;
-    font-display: swap;
-    src: url('../assets/fonts/Inter-Medium.woff2') format('woff2');
-}
-
-@font-face {
-    font-family: 'Inter';
-    font-style: normal;
-    font-weight: 600;
-    font-display: swap;
-    src: url('../assets/fonts/Inter-SemiBold.woff2') format('woff2');
-}
-
-@font-face {
-    font-family: 'Inter';
-    font-style: normal;
-    font-weight: 700;
-    font-display: swap;
-    src: url('../assets/fonts/Inter-Bold.woff2') format('woff2');
-}
-
-/* JetBrains Mono Font Family - For code, markdown editor, and ASCII art */
-@font-face {
-    font-family: 'JetBrains Mono';
-    font-style: normal;
-    font-weight: 400;
-    font-display: swap;
-    src: url('../assets/fonts/JetBrainsMono-Regular.woff2') format('woff2');
-}
-
-@font-face {
-    font-family: 'JetBrains Mono';
-    font-style: normal;
-    font-weight: 500;
-    font-display: swap;
-    src: url('../assets/fonts/JetBrainsMono-Medium.woff2') format('woff2');
-}
-
-@font-face {
-    font-family: 'JetBrains Mono';
-    font-style: normal;
-    font-weight: 600;
-    font-display: swap;
-    src: url('../assets/fonts/JetBrainsMono-SemiBold.woff2') format('woff2');
-}
-
-@font-face {
-    font-family: 'JetBrains Mono';
-    font-style: normal;
-    font-weight: 700;
-    font-display: swap;
-    src: url('../assets/fonts/JetBrainsMono-Bold.woff2') format('woff2');
-}

src/main/PDFOperations.js

@@ -60,13 +60,13 @@ async function pdfSplit(data) {
     const pdf = await PDFDocument.load(pdfBytes);
     const totalPages = pdf.getPageCount();
 
-    let splits = [];
+    const splits = [];
 
     if (data.splitMode === 'pages') {
       const ranges = data.pageRanges.split(',').map(r => r.trim());
       for (let i = 0; i < ranges.length; i++) {
         const range = ranges[i];
-        let pages = [];
+        const pages = [];
 
         if (range.includes('-')) {
           const [start, end] = range.split('-').map(n => parseInt(n.trim()));

src/main/files/binary.js

@@ -0,0 +1,13 @@
+// src/main/files/binary.js
+// Binary file write handler (used by Word .docx export)
+const { ipcMain } = require('electron');
+const fs = require('fs').promises;
+
+function register() {
+  ipcMain.handle('write-buffer', async (_event, { path: filePath, buffer }) => {
+    await fs.writeFile(filePath, Buffer.from(buffer));
+    return { ok: true };
+  });
+}
+
+module.exports = { register };

src/main/files/git.js

@@ -0,0 +1,28 @@
+// src/main/files/git.js
+// Git IPC handlers — thin wrapper over GitOperations
+const { ipcMain } = require('electron');
+const GitOperations = require('../GitOperations');
+
+function register(currentFileRef) {
+  ipcMain.handle('git-status', async () => {
+    const dir = currentFileRef.current ? require('path').dirname(currentFileRef.current) : process.cwd();
+    return GitOperations.getStatus(dir);
+  });
+
+  ipcMain.handle('git-stage', async (_event, { files }) => {
+    const dir = currentFileRef.current ? require('path').dirname(currentFileRef.current) : process.cwd();
+    return GitOperations.stage(dir, files);
+  });
+
+  ipcMain.handle('git-commit', async (_event, { message }) => {
+    const dir = currentFileRef.current ? require('path').dirname(currentFileRef.current) : process.cwd();
+    return GitOperations.commit(dir, message);
+  });
+
+  ipcMain.handle('git-log', async () => {
+    const dir = currentFileRef.current ? require('path').dirname(currentFileRef.current) : process.cwd();
+    return GitOperations.log(dir);
+  });
+}
+
+module.exports = { register };

src/main/files/index.js

@@ -0,0 +1,157 @@
+// src/main/files/index.js
+// File ops facade — registers all file-related IPC handlers
+const { ipcMain, dialog, shell } = require('electron');
+const fs = require('fs');
+const path = require('path');
+const { register: registerGit } = require('./git');
+const { register: registerBinary } = require('./binary');
+
+function register({ validatePath, resolveWritablePath, isPathAccessible, currentFileRef, mainWindow }) {
+  // pick-folder
+  ipcMain.handle('pick-folder', async () => {
+    const result = await dialog.showOpenDialog(mainWindow, {
+      properties: ['openDirectory'],
+    });
+    if (result.canceled || result.filePaths.length === 0) return null;
+    return result.filePaths[0];
+  });
+
+  // pick-file
+  ipcMain.handle('pick-file', async () => {
+    const result = await dialog.showOpenDialog(mainWindow, {
+      properties: ['openFile'],
+      filters: [{ name: 'Markdown', extensions: ['md', 'markdown', 'mdown', 'mkd'] }],
+    });
+    if (result.canceled || result.filePaths.length === 0) return null;
+    return result.filePaths[0];
+  });
+
+  // read-file
+  ipcMain.handle('read-file', async (event, filePath) => {
+    const validation = validatePath(filePath);
+    if (!validation.valid || !isPathAccessible(validation.resolved)) {
+      throw new Error(validation.error || 'Invalid file path');
+    }
+    return fs.readFileSync(validation.resolved, 'utf-8');
+  });
+
+  // write-file
+  ipcMain.handle('write-file', async (event, payload) => {
+    const validation = resolveWritablePath(payload?.path);
+    if (!validation.valid) {
+      throw new Error(validation.error || 'Invalid file path');
+    }
+    fs.mkdirSync(path.dirname(validation.resolved), { recursive: true });
+    fs.writeFileSync(validation.resolved, payload?.content ?? '', 'utf-8');
+    return { path: validation.resolved };
+  });
+
+  // delete-file
+  ipcMain.handle('delete-file', async (event, filePath) => {
+    const validation = validatePath(filePath);
+    if (!validation.valid || !isPathAccessible(validation.resolved)) {
+      throw new Error(validation.error || 'Invalid file path');
+    }
+    fs.rmSync(validation.resolved, { recursive: true, force: false });
+    return true;
+  });
+
+  // ensure-directory
+  ipcMain.handle('ensure-directory', async (event, dirPath) => {
+    const validation = resolveWritablePath(dirPath);
+    if (!validation.valid) {
+      throw new Error(validation.error || 'Invalid directory path');
+    }
+    fs.mkdirSync(validation.resolved, { recursive: true });
+    return validation.resolved;
+  });
+
+  // path-exists
+  ipcMain.handle('path-exists', async (event, filePath) => {
+    const validation = resolveWritablePath(filePath);
+    return validation.valid ? fs.existsSync(validation.resolved) : false;
+  });
+
+  // is-directory
+  ipcMain.handle('is-directory', async (event, filePath) => {
+    const validation = validatePath(filePath);
+    if (!validation.valid || !isPathAccessible(validation.resolved)) {
+      return false;
+    }
+    return fs.statSync(validation.resolved).isDirectory();
+  });
+
+  // copy-path
+  ipcMain.handle('copy-path', async (event, payload) => {
+    const sourceValidation = validatePath(payload?.source);
+    const destinationValidation = resolveWritablePath(payload?.destination);
+
+    if (!sourceValidation.valid || !isPathAccessible(sourceValidation.resolved)) {
+      throw new Error(sourceValidation.error || 'Invalid source path');
+    }
+    if (!destinationValidation.valid) {
+      throw new Error(destinationValidation.error || 'Invalid destination path');
+    }
+
+    fs.mkdirSync(path.dirname(destinationValidation.resolved), { recursive: true });
+    fs.cpSync(sourceValidation.resolved, destinationValidation.resolved, { recursive: true });
+    return { source: sourceValidation.resolved, destination: destinationValidation.resolved };
+  });
+
+  // move-path
+  ipcMain.handle('move-path', async (event, payload) => {
+    const sourceValidation = validatePath(payload?.source);
+    const destinationValidation = resolveWritablePath(payload?.destination);
+
+    if (!sourceValidation.valid || !isPathAccessible(sourceValidation.resolved)) {
+      throw new Error(sourceValidation.error || 'Invalid source path');
+    }
+    if (!destinationValidation.valid) {
+      throw new Error(destinationValidation.error || 'Invalid destination path');
+    }
+
+    fs.mkdirSync(path.dirname(destinationValidation.resolved), { recursive: true });
+
+    try {
+      fs.renameSync(sourceValidation.resolved, destinationValidation.resolved);
+    } catch (error) {
+      if (error.code !== 'EXDEV') {
+        throw error;
+      }
+      fs.cpSync(sourceValidation.resolved, destinationValidation.resolved, { recursive: true });
+      fs.rmSync(sourceValidation.resolved, { recursive: true, force: false });
+    }
+
+    return { source: sourceValidation.resolved, destination: destinationValidation.resolved };
+  });
+
+  // open-file-path
+  ipcMain.on('open-file-path', (event, filePath) => {
+    try {
+      const validation = validatePath(filePath);
+      if (!validation.valid) {
+        console.error('[SECURITY] Invalid file path:', validation.error);
+        return;
+      }
+
+      if (!isPathAccessible(validation.resolved)) {
+        return;
+      }
+
+      const stat = fs.statSync(validation.resolved);
+      if (stat.size > 50 * 1024 * 1024) return;
+      const content = fs.readFileSync(validation.resolved, 'utf-8');
+      // Emit set-current-file back to main process so it updates its currentFile variable
+      mainWindow.webContents.send('set-current-file', validation.resolved);
+      mainWindow.webContents.send('file-opened', { path: validation.resolved, content });
+    } catch (err) {
+      console.error('open-file-path error:', err);
+    }
+  });
+
+  // Register sub-modules
+  registerGit(currentFileRef);
+  registerBinary();
+}
+
+module.exports = { register };

src/main/menu/index.js

@@ -0,0 +1,34 @@
+// src/main/menu/index.js
+// buildMenu() composes the app menu from items; register() sets it on the app
+
+const { Menu } = require('electron');
+const {
+  fileItems,
+  editItems,
+  viewItems,
+  batchItems,
+  convertItems,
+  pdfEditorItems,
+  toolsItems,
+  helpItems
+} = require('./items');
+
+function buildMenu(mainWindow) {
+  const template = [
+    { label: '&File', submenu: fileItems(mainWindow) },
+    { label: '&Edit', submenu: editItems(mainWindow) },
+    { label: '&View', submenu: viewItems(mainWindow) },
+    { label: '&Batch', submenu: batchItems(mainWindow) },
+    { label: '&Convert', submenu: convertItems(mainWindow) },
+    { label: 'PDF Editor', submenu: pdfEditorItems(mainWindow) },
+    { label: '&Tools', submenu: toolsItems(mainWindow) },
+    { label: '&Help', submenu: helpItems(mainWindow) }
+  ];
+  return Menu.buildFromTemplate(template);
+}
+
+function register(mainWindow) {
+  Menu.setApplicationMenu(buildMenu(mainWindow));
+}
+
+module.exports = { register, buildMenu };

src/main/menu/items.js

@@ -0,0 +1,522 @@
+// src/main/menu/items.js
+// Individual menu items — pure functions that take (mainWindow) and return menu item arrays
+
+const { app, dialog, shell } = require('electron');
+const path = require('path');
+const fs = require('fs');
+
+// Helper: build recent files submenu
+function buildRecentFilesMenu(mainWindow) {
+  try {
+    const recentFilesPath = path.join(app.getPath('userData'), 'recent-files.json');
+    if (!fs.existsSync(recentFilesPath)) return [{ label: 'No Recent Files', enabled: false }];
+    const recentFiles = JSON.parse(fs.readFileSync(recentFilesPath, 'utf-8'));
+    const existing = recentFiles.filter(file => fs.existsSync(file));
+    if (existing.length === 0) return [{ label: 'No Recent Files', enabled: false }];
+    const items = existing.map(file => ({
+      label: path.basename(file),
+      click: () => {
+        const { openFileFromPath } = require('../main');
+        openFileFromPath(file);
+      }
+    }));
+    items.push(
+      { type: 'separator' },
+      {
+        label: 'Clear Recent Files',
+        click: () => {
+          if (mainWindow) {
+            mainWindow.webContents.send('clear-recent-files');
+          }
+        }
+      }
+    );
+    return items;
+  } catch (e) {
+    return [{ label: 'No Recent Files', enabled: false }];
+  }
+}
+
+function fileItems(mainWindow) {
+  return [
+    {
+      label: 'New',
+      accelerator: 'CmdOrCtrl+N',
+      click: () => mainWindow.webContents.send('file-new')
+    },
+    {
+      label: 'Open',
+      accelerator: 'CmdOrCtrl+O',
+      click: () => {
+        const { openFile } = require('../main');
+        openFile();
+      }
+    },
+    {
+      label: 'Open PDF',
+      accelerator: 'CmdOrCtrl+Shift+O',
+      click: () => {
+        const { openPdfFile } = require('../main');
+        openPdfFile();
+      }
+    },
+    {
+      label: 'Save',
+      accelerator: 'CmdOrCtrl+S',
+      click: () => mainWindow.webContents.send('file-save')
+    },
+    {
+      label: 'Save As',
+      accelerator: 'CmdOrCtrl+Shift+S',
+      click: () => {
+        const { saveAsFile } = require('../main');
+        saveAsFile();
+      }
+    },
+    { type: 'separator' },
+    // NOTE: Print Preview submenu removed — handled by React <PrintPreview> overlay
+    { type: 'separator' },
+    {
+      label: 'Recent Files',
+      submenu: buildRecentFilesMenu(mainWindow)
+    },
+    { type: 'separator' },
+    {
+      label: 'New from Template',
+      submenu: [
+        { label: 'Blog Post', click: () => mainWindow.webContents.send('load-template-menu', 'blog-post.md') },
+        { label: 'Meeting Notes', click: () => mainWindow.webContents.send('load-template-menu', 'meeting-notes.md') },
+        { label: 'Technical Spec', click: () => mainWindow.webContents.send('load-template-menu', 'technical-spec.md') },
+        { label: 'Changelog', click: () => mainWindow.webContents.send('load-template-menu', 'changelog.md') },
+        { label: 'README', click: () => mainWindow.webContents.send('load-template-menu', 'readme.md') },
+        { label: 'Project Plan', click: () => mainWindow.webContents.send('load-template-menu', 'project-plan.md') },
+        { label: 'API Documentation', click: () => mainWindow.webContents.send('load-template-menu', 'api-docs.md') },
+        { label: 'Tutorial', click: () => mainWindow.webContents.send('load-template-menu', 'tutorial.md') },
+        { label: 'Release Notes', click: () => mainWindow.webContents.send('load-template-menu', 'release-notes.md') },
+        { label: 'Comparison', click: () => mainWindow.webContents.send('load-template-menu', 'comparison.md') }
+      ]
+    },
+    { type: 'separator' },
+    {
+      label: 'Import Document...',
+      accelerator: 'CmdOrCtrl+I',
+      click: () => {
+        const { importDocument } = require('../main');
+        importDocument();
+      }
+    },
+    {
+      label: 'Export',
+      submenu: [
+        {
+          label: 'HTML', click: () => {
+            const { exportFile } = require('../main');
+            exportFile('html');
+          }
+        },
+        {
+          label: 'PDF', click: () => {
+            const { exportFile } = require('../main');
+            exportFile('pdf');
+          }
+        },
+        {
+          label: 'PDF (Enhanced)', click: () => {
+            const { exportPDFViaWordTemplate } = require('../main');
+            exportPDFViaWordTemplate();
+          }, accelerator: 'Ctrl+Shift+P'
+        },
+        {
+          label: 'DOCX', click: () => {
+            const { exportFile } = require('../main');
+            exportFile('docx');
+          }
+        },
+        {
+          label: 'DOCX (Enhanced)', click: () => {
+            const { exportWordWithTemplate } = require('../main');
+            exportWordWithTemplate();
+          }, accelerator: 'Ctrl+Shift+W'
+        },
+        { label: 'LaTeX', click: () => { const { exportFile } = require('../main'); exportFile('latex'); } },
+        { label: 'RTF', click: () => { const { exportFile } = require('../main'); exportFile('rtf'); } },
+        { label: 'ODT', click: () => { const { exportFile } = require('../main'); exportFile('odt'); } },
+        { label: 'EPUB', click: () => { const { exportFile } = require('../main'); exportFile('epub'); } },
+        { type: 'separator' },
+        { label: 'PowerPoint (PPTX)', click: () => { const { exportFile } = require('../main'); exportFile('pptx'); } },
+        { label: 'OpenDocument Presentation (ODP)', click: () => { const { exportFile } = require('../main'); exportFile('odp'); } },
+        { type: 'separator' },
+        { label: 'CSV (Tables)', click: () => { const { exportSpreadsheet } = require('../main'); exportSpreadsheet('csv'); } },
+        { type: 'separator' },
+        { label: 'JSON (.json)', click: () => { const { exportFile } = require('../main'); exportFile('json'); } },
+        { label: 'YAML (.yaml)', click: () => { const { exportFile } = require('../main'); exportFile('yaml'); } },
+        { label: 'XML (.xml)', click: () => { const { exportFile } = require('../main'); exportFile('xml'); } },
+        { type: 'separator' },
+        { label: 'Confluence Wiki (.txt)', click: () => { const { exportFile } = require('../main'); exportFile('confluence'); } },
+        { label: 'MOBI E-book (.mobi)', click: () => { const { exportFile } = require('../main'); exportFile('mobi'); } }
+      ]
+    },
+    { type: 'separator' },
+    {
+      label: 'Select Word Template...',
+      click: () => {
+        const { selectWordTemplate } = require('../main');
+        selectWordTemplate();
+      }
+    },
+    {
+      label: 'Template Settings...',
+      click: () => {
+        const { showTemplateSettings } = require('../main');
+        showTemplateSettings();
+      }
+    },
+    {
+      label: 'Header & Footer Settings...',
+      click: () => {
+        if (mainWindow) {
+          mainWindow.webContents.send('open-header-footer-dialog');
+        }
+      }
+    },
+    { type: 'separator' },
+    {
+      label: 'Quit',
+      accelerator: process.platform === 'darwin' ? 'Cmd+Q' : 'Ctrl+Q',
+      click: () => app.quit()
+    }
+  ];
+}
+
+function editItems(mainWindow) {
+  return [
+    {
+      label: 'Undo',
+      accelerator: 'CmdOrCtrl+Z',
+      click: () => mainWindow.webContents.send('undo')
+    },
+    {
+      label: 'Redo',
+      accelerator: 'CmdOrCtrl+Shift+Z',
+      click: () => mainWindow.webContents.send('redo')
+    },
+    { type: 'separator' },
+    { label: 'Cut', accelerator: 'CmdOrCtrl+X', role: 'cut' },
+    { label: 'Copy', accelerator: 'CmdOrCtrl+C', role: 'copy' },
+    { label: 'Paste', accelerator: 'CmdOrCtrl+V', role: 'paste' },
+    { label: 'Select All', accelerator: 'CmdOrCtrl+A', role: 'selectAll' },
+    { type: 'separator' },
+    {
+      label: 'Find & Replace',
+      accelerator: 'CmdOrCtrl+F',
+      click: () => mainWindow.webContents.send('toggle-find')
+    }
+  ];
+}
+
+function viewItems(mainWindow) {
+  return [
+    {
+      label: 'Toggle Preview',
+      accelerator: 'CmdOrCtrl+Shift+V',
+      click: () => mainWindow.webContents.send('toggle-preview')
+    },
+    // NOTE: Command Palette removed — handled by useCommandStore
+    { type: 'separator' },
+    {
+      label: 'Sidebar',
+      submenu: [
+        { label: 'File Explorer', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'explorer') },
+        { label: 'Git', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'git') },
+        { label: 'Snippets', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'snippets') },
+        { label: 'Templates', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'templates') }
+      ]
+    },
+    {
+      label: 'Bottom Panel (REPL)',
+      click: () => mainWindow.webContents.send('toggle-bottom-panel')
+    },
+    { type: 'separator' },
+    {
+      label: 'Theme',
+      submenu: [
+        { label: 'Atom One Light (Default)', click: () => { const { setTheme } = require('../main'); setTheme('atomonelight'); } },
+        { label: 'GitHub Light', click: () => { const { setTheme } = require('../main'); setTheme('github'); } },
+        { label: 'Light', click: () => { const { setTheme } = require('../main'); setTheme('light'); } },
+        { label: 'Solarized Light', click: () => { const { setTheme } = require('../main'); setTheme('solarized'); } },
+        { label: 'Gruvbox Light', click: () => { const { setTheme } = require('../main'); setTheme('gruvbox-light'); } },
+        { label: 'Ayu Light', click: () => { const { setTheme } = require('../main'); setTheme('ayu-light'); } },
+        { label: 'Sepia', click: () => { const { setTheme } = require('../main'); setTheme('sepia'); } },
+        { label: 'Paper', click: () => { const { setTheme } = require('../main'); setTheme('paper'); } },
+        { label: 'Rose Pine Dawn', click: () => { const { setTheme } = require('../main'); setTheme('rosepine-dawn'); } },
+        { label: 'Concrete Light', click: () => { const { setTheme } = require('../main'); setTheme('concrete-light'); } },
+        { type: 'separator' },
+        { label: 'Dark', click: () => { const { setTheme } = require('../main'); setTheme('dark'); } },
+        { label: 'One Dark', click: () => { const { setTheme } = require('../main'); setTheme('onedark'); } },
+        { label: 'Dracula', click: () => { const { setTheme } = require('../main'); setTheme('dracula'); } },
+        { label: 'Nord', click: () => { const { setTheme } = require('../main'); setTheme('nord'); } },
+        { label: 'Monokai', click: () => { const { setTheme } = require('../main'); setTheme('monokai'); } },
+        { label: 'Material', click: () => { const { setTheme } = require('../main'); setTheme('material'); } },
+        { label: 'Gruvbox Dark', click: () => { const { setTheme } = require('../main'); setTheme('gruvbox-dark'); } },
+        { label: 'Tokyo Night', click: () => { const { setTheme } = require('../main'); setTheme('tokyonight'); } },
+        { label: 'Palenight', click: () => { const { setTheme } = require('../main'); setTheme('palenight'); } },
+        { label: 'Ayu Dark', click: () => { const { setTheme } = require('../main'); setTheme('ayu-dark'); } },
+        { label: 'Ayu Mirage', click: () => { const { setTheme } = require('../main'); setTheme('ayu-mirage'); } },
+        { label: 'Oceanic Next', click: () => { const { setTheme } = require('../main'); setTheme('oceanic-next'); } },
+        { label: 'Cobalt2', click: () => { const { setTheme } = require('../main'); setTheme('cobalt2'); } },
+        { label: 'Concrete Dark', click: () => { const { setTheme } = require('../main'); setTheme('concrete-dark'); } },
+        { label: 'Concrete Warm', click: () => { const { setTheme } = require('../main'); setTheme('concrete-warm'); } }
+      ]
+    },
+    { type: 'separator' },
+    {
+      label: 'Font Size',
+      submenu: [
+        {
+          label: 'Increase Font Size',
+          accelerator: 'CmdOrCtrl+Shift+Plus',
+          click: () => mainWindow.webContents.send('adjust-font-size', 'increase')
+        },
+        {
+          label: 'Decrease Font Size',
+          accelerator: 'CmdOrCtrl+Shift+-',
+          click: () => mainWindow.webContents.send('adjust-font-size', 'decrease')
+        },
+        {
+          label: 'Reset Font Size',
+          accelerator: 'CmdOrCtrl+Shift+0',
+          click: () => mainWindow.webContents.send('adjust-font-size', 'reset')
+        }
+      ]
+    },
+    { type: 'separator' },
+    {
+      label: 'Spell Check',
+      type: 'checkbox',
+      checked: true,
+      click: (menuItem) => {
+        mainWindow.webContents.session.setSpellCheckerEnabled(menuItem.checked);
+      }
+    },
+    { type: 'separator' },
+    {
+      label: 'Custom Preview CSS',
+      submenu: [
+        {
+          label: 'Load Custom Preview CSS...',
+          click: () => mainWindow.webContents.send('load-custom-css')
+        },
+        {
+          label: 'Clear Custom Preview CSS',
+          click: () => mainWindow.webContents.send('clear-custom-css')
+        }
+      ]
+    },
+    { type: 'separator' },
+    { label: 'Reload', accelerator: 'CmdOrCtrl+R', role: 'reload' },
+    { label: 'Toggle DevTools', accelerator: 'F12', role: 'toggleDevTools' },
+    { type: 'separator' },
+    { label: 'Zoom In', accelerator: 'CmdOrCtrl+Plus', role: 'zoomIn' },
+    { label: 'Zoom Out', accelerator: 'CmdOrCtrl+-', role: 'zoomOut' },
+    { label: 'Reset Zoom', accelerator: 'CmdOrCtrl+0', role: 'resetZoom' }
+  ];
+}
+
+function batchItems(mainWindow) {
+  return [
+    {
+      label: 'Convert Markdown Folder...',
+      click: () => {
+        const { showBatchConversionDialog } = require('../main');
+        showBatchConversionDialog();
+      }
+    },
+    { type: 'separator' },
+    {
+      label: 'Batch Image Conversion...',
+      click: () => mainWindow.webContents.send('show-batch-converter', 'image')
+    },
+    {
+      label: 'Batch Audio Conversion...',
+      click: () => mainWindow.webContents.send('show-batch-converter', 'audio')
+    },
+    {
+      label: 'Batch Video Conversion...',
+      click: () => mainWindow.webContents.send('show-batch-converter', 'video')
+    },
+    {
+      label: 'Batch PDF Conversion...',
+      click: () => mainWindow.webContents.send('show-batch-converter', 'pdf')
+    }
+  ];
+}
+
+function convertItems(mainWindow) {
+  return [
+    {
+      label: 'Universal File Converter...',
+      accelerator: 'CmdOrCtrl+Shift+C',
+      click: () => {
+        const { showUniversalConverterDialog } = require('../main');
+        showUniversalConverterDialog();
+      }
+    }
+  ];
+}
+
+function pdfEditorItems(mainWindow) {
+  return [
+    {
+      label: 'Open PDF File...',
+      accelerator: 'CmdOrCtrl+Shift+O',
+      click: () => {
+        const { openPdfFile } = require('../main');
+        openPdfFile();
+      }
+    },
+    { type: 'separator' },
+    {
+      label: 'Merge PDFs...',
+      click: () => {
+        const { showPDFEditorDialog } = require('../main');
+        showPDFEditorDialog('merge');
+      }
+    },
+    {
+      label: 'Split PDF...',
+      click: () => {
+        const { showPDFEditorDialog } = require('../main');
+        showPDFEditorDialog('split');
+      }
+    },
+    {
+      label: 'Compress PDF...',
+      click: () => {
+        const { showPDFEditorDialog } = require('../main');
+        showPDFEditorDialog('compress');
+      }
+    },
+    { type: 'separator' },
+    {
+      label: 'Rotate Pages...',
+      click: () => {
+        const { showPDFEditorDialog } = require('../main');
+        showPDFEditorDialog('rotate');
+      }
+    },
+    {
+      label: 'Delete Pages...',
+      click: () => {
+        const { showPDFEditorDialog } = require('../main');
+        showPDFEditorDialog('delete');
+      }
+    },
+    {
+      label: 'Reorder Pages...',
+      click: () => {
+        const { showPDFEditorDialog } = require('../main');
+        showPDFEditorDialog('reorder');
+      }
+    },
+    { type: 'separator' },
+    {
+      label: 'Add Watermark...',
+      click: () => {
+        const { showPDFEditorDialog } = require('../main');
+        showPDFEditorDialog('watermark');
+      }
+    },
+    { type: 'separator' },
+    {
+      label: 'Security',
+      submenu: [
+        {
+          label: 'Add Password Protection...',
+          click: () => {
+            const { showPDFEditorDialog } = require('../main');
+            showPDFEditorDialog('encrypt');
+          }
+        },
+        {
+          label: 'Remove Password...',
+          click: () => {
+            const { showPDFEditorDialog } = require('../main');
+            showPDFEditorDialog('decrypt');
+          }
+        },
+        {
+          label: 'Set Permissions...',
+          click: () => {
+            const { showPDFEditorDialog } = require('../main');
+            showPDFEditorDialog('permissions');
+          }
+        }
+      ]
+    },
+    { type: 'separator' },
+    {
+      label: 'About PDF Editor',
+      click: () => {
+        const { showAboutDialog } = require('../main');
+        showAboutDialog();
+      }
+    }
+  ];
+}
+
+function toolsItems(mainWindow) {
+  // NOTE: Table Generator and ASCII Art Generator removed — handled by React dialogs
+  return [
+    // Removed: Table Generator (Cmd+Ctrl+Shift+T) — now React <TableGeneratorDialog>
+    // Removed: ASCII Art Generator (Cmd+Ctrl+Shift+A) — now React <AsciiGeneratorDialog>
+    { type: 'separator' },
+    {
+      label: 'Document Compare',
+      click: () => mainWindow.webContents.send('show-document-compare')
+    }
+  ];
+}
+
+function helpItems(mainWindow) {
+  return [
+    {
+      label: 'About MarkdownConverter',
+      click: () => {
+        const { showAboutDialog } = require('../main');
+        showAboutDialog();
+      }
+    },
+    { type: 'separator' },
+    {
+      label: 'Dependencies & Requirements',
+      click: () => {
+        const { showDependenciesDialog } = require('../main');
+        showDependenciesDialog();
+      }
+    },
+    { type: 'separator' },
+    {
+      label: 'Documentation',
+      click: () => shell.openExternal('https://github.com/amitwh/markdown-converter')
+    },
+    {
+      label: 'Report Issue',
+      click: () => shell.openExternal('https://github.com/amitwh/markdown-converter/issues')
+    },
+    {
+      label: 'Check for Updates',
+      click: () => shell.openExternal('https://github.com/amitwh/markdown-converter/releases')
+    }
+  ];
+}
+
+module.exports = {
+  fileItems,
+  editItems,
+  viewItems,
+  batchItems,
+  convertItems,
+  pdfEditorItems,
+  toolsItems,
+  helpItems
+};

src/main/store.js

@@ -0,0 +1,31 @@
+// src/main/store.js
+// Simple JSON-file preferences store (replaces electron-store)
+
+const { app } = require('electron');
+const path = require('path');
+const fs = require('fs');
+
+const settingsPath = path.join(app.getPath('userData'), 'settings.json');
+
+const store = {
+  get(key, defaultValue) {
+    try {
+      const data = fs.readFileSync(settingsPath, 'utf-8');
+      const settings = JSON.parse(data);
+      return settings[key] !== undefined ? settings[key] : defaultValue;
+    } catch {
+      return defaultValue;
+    }
+  },
+  set(key, value) {
+    let settings = {};
+    try {
+      const data = fs.readFileSync(settingsPath, 'utf-8');
+      settings = JSON.parse(data);
+    } catch {}
+    settings[key] = value;
+    fs.writeFileSync(settingsPath, JSON.stringify(settings, null, 2));
+  }
+};
+
+module.exports = store;

src/main/utils/paths.js

@@ -0,0 +1,107 @@
+// src/main/utils/paths.js
+// Path helpers — extracted from src/main.js lines 109-207
+const { app } = require('electron');
+const path = require('path');
+const fs = require('fs');
+
+function getAllowedDirectories() {
+  const dirs = [
+    app.getPath('documents'),
+    app.getPath('desktop'),
+    app.getPath('downloads'),
+    app.getPath('home'),
+    process.cwd() // Current working directory
+  ].filter(Boolean); // Remove any undefined paths
+  return dirs;
+}
+
+/**
+ * Validates that a file path is safe and doesn't attempt path traversal
+ * @param {string} filePath - The path to validate
+ * @returns {{ valid: boolean, resolved: string, error?: string }}
+ */
+function validatePath(filePath) {
+  if (!filePath || typeof filePath !== 'string') {
+    return { valid: false, resolved: '', error: 'Invalid path' };
+  }
+
+  // Resolve to absolute path (handles .., ., symlinks)
+  let resolved;
+  try {
+    resolved = path.resolve(filePath);
+  } catch (err) {
+    return { valid: false, resolved: '', error: 'Invalid path format' };
+  }
+
+  // Normalize path separators
+  resolved = path.normalize(resolved);
+
+  // Check for null bytes (path injection)
+  if (resolved.includes('\0')) {
+    return { valid: false, resolved: '', error: 'Null byte in path' };
+  }
+
+  // Check if path exists
+  if (!fs.existsSync(resolved)) {
+    return { valid: false, resolved, error: 'Path does not exist' };
+  }
+
+  return { valid: true, resolved };
+}
+
+/**
+ * Resolves a path for operations where the target may not exist yet.
+ * Validates string shape and blocks obviously sensitive locations.
+ * @param {string} filePath
+ * @returns {{ valid: boolean, resolved: string, error?: string }}
+ */
+function resolveWritablePath(filePath) {
+  if (!filePath || typeof filePath !== 'string') {
+    return { valid: false, resolved: '', error: 'Invalid path' };
+  }
+
+  let resolved;
+  try {
+    resolved = path.normalize(path.resolve(filePath));
+  } catch (err) {
+    return { valid: false, resolved: '', error: 'Invalid path format' };
+  }
+
+  if (resolved.includes('\0')) {
+    return { valid: false, resolved: '', error: 'Null byte in path' };
+  }
+
+  if (!isPathAccessible(resolved)) {
+    return { valid: false, resolved, error: 'Path is not accessible' };
+  }
+
+  return { valid: true, resolved };
+}
+
+/**
+ * Checks if a resolved path is within allowed directories
+ * For an editor app, we allow access to all user-accessible paths
+ * but log any suspicious access attempts
+ * @param {string} resolvedPath - The resolved absolute path
+ * @returns {boolean}
+ */
+function isPathAccessible(resolvedPath) {
+  // Block access to sensitive system directories
+  const blockedPaths = [
+    '/etc/passwd', '/etc/shadow', '/root',
+    'C:\\Windows\\System32', 'C:\\Windows\\System',
+    '/System', '/private/etc'
+  ];
+
+  const normalizedPath = resolvedPath.toLowerCase();
+  for (const blocked of blockedPaths) {
+    if (normalizedPath.startsWith(blocked.toLowerCase())) {
+      console.warn('[SECURITY] Blocked access to sensitive path:', resolvedPath);
+      return false;
+    }
+  }
+
+  return true;
+}
+
+module.exports = { getAllowedDirectories, validatePath, resolveWritablePath, isPathAccessible };

src/main/window/index.js

@@ -0,0 +1,80 @@
+// src/main/window/index.js
+// Main window creation
+
+const { BrowserWindow } = require('electron');
+const path = require('path');
+const state = require('./state');
+const menu = require('../menu');
+
+function createMainWindow() {
+  const bounds = state.load();
+  const win = new BrowserWindow({
+    width: bounds.width,
+    height: bounds.height,
+    x: bounds.x,
+    y: bounds.y,
+    show: false,
+    webPreferences: {
+      nodeIntegration: true,
+      contextIsolation: false,
+      spellcheck: true
+    },
+    icon: path.join(__dirname, '../../assets/icon.png')
+  });
+
+  win.loadFile(path.join(__dirname, '../../renderer/index.html'));
+
+  // Show window only after content is ready — avoids blank flash
+  win.once('ready-to-show', () => {
+    win.show();
+  });
+
+  menu.register(win);
+
+  win.on('closed', () => {
+    state.save(win);
+  });
+
+  // Spell check context menu
+  win.webContents.on('context-menu', (event, params) => {
+    const { Menu, MenuItem } = require('electron');
+    const ctxMenu = new Menu();
+
+    // Add spell check suggestions
+    if (params.misspelledWord) {
+      for (const suggestion of params.dictionarySuggestions) {
+        ctxMenu.append(new MenuItem({
+          label: suggestion,
+          click: () => win.webContents.replaceMisspelling(suggestion)
+        }));
+      }
+      if (params.dictionarySuggestions.length > 0) {
+        ctxMenu.append(new MenuItem({ type: 'separator' }));
+      }
+      ctxMenu.append(new MenuItem({
+        label: 'Add to Dictionary',
+        click: () => win.webContents.session.addWordToSpellCheckerDictionary(params.misspelledWord)
+      }));
+      ctxMenu.append(new MenuItem({ type: 'separator' }));
+    }
+
+    // Standard context menu items
+    ctxMenu.append(new MenuItem({ role: 'cut' }));
+    ctxMenu.append(new MenuItem({ role: 'copy' }));
+    ctxMenu.append(new MenuItem({ role: 'paste' }));
+    ctxMenu.append(new MenuItem({ role: 'selectAll' }));
+
+    ctxMenu.popup();
+  });
+
+  // Wait for the page to fully load before sending file data
+  win.webContents.on('did-finish-load', () => {
+    console.log('Window finished loading');
+    // Don't open file here - wait for renderer-ready signal
+    // The renderer will send renderer-ready when TabManager is initialized
+  });
+
+  return win;
+}
+
+module.exports = { createMainWindow };

src/main/window/state.js

@@ -0,0 +1,27 @@
+// src/main/window/state.js
+// Window state persistence (size, position)
+
+const { app } = require('electron');
+const path = require('path');
+const fs = require('fs');
+
+const stateFile = path.join(app.getPath('userData'), 'window-state.json');
+
+function load() {
+  try {
+    return JSON.parse(fs.readFileSync(stateFile, 'utf8'));
+  } catch {
+    return { width: 1200, height: 800 };
+  }
+}
+
+function save(win) {
+  const bounds = win.getBounds();
+  try {
+    fs.writeFileSync(stateFile, JSON.stringify(bounds));
+  } catch {
+    /* ignore */
+  }
+}
+
+module.exports = { load, save };

src/main/word-template/index.js

@@ -655,7 +655,7 @@ class WordTemplateExporter {
      */
     parseInlineFormatting(text) {
         let xml = '';
-        let pos = 0;
+        const pos = 0;
 
         // Patterns for inline formatting
         const patterns = [

src/preload.js

@@ -9,7 +9,7 @@
  * - All IPC channels are explicitly whitelisted
  * - Prevents XSS from escalating to full system access
  *
- * @version 4.1.0
+ * @version 4.4.1
  */
 
 const { contextBridge, ipcRenderer } = require('electron');
@@ -23,6 +23,7 @@ const ALLOWED_SEND_CHANNELS = [
   'save-recent-files',
   'clear-recent-files',
   'renderer-ready',
+  'select-custom-css',
 
   // Theme
   'get-theme',
@@ -84,12 +85,6 @@ const ALLOWED_SEND_CHANNELS = [
   'get-pdf-page-count',
   'select-pdf-folder',
 
-  // ASCII generator (separate window)
-  'open-ascii-generator',
-
-  // Table generator (separate window)
-  'open-table-generator',
-
   // Insert generated content
   'insert-generated-content',
 
@@ -150,6 +145,8 @@ const ALLOWED_RECEIVE_CHANNELS = [
   'get-content-for-save',
   'get-content-for-spreadsheet',
   'recent-files-cleared',
+  'load-custom-css',
+  'clear-custom-css',
 
   // UI toggles
   'toggle-preview',
@@ -166,15 +163,10 @@ const ALLOWED_RECEIVE_CHANNELS = [
   // Font
   'adjust-font-size',
 
-  // Print
-  'print-preview',
-  'print-preview-styled',
-
   // Export dialogs
   'show-export-dialog',
   'show-batch-dialog',
   'show-universal-converter-dialog',
-  'show-table-generator',
   'show-pdf-editor-dialog',
 
   // Converter dialogs
@@ -210,12 +202,7 @@ const ALLOWED_RECEIVE_CHANNELS = [
   'pdf-operation-complete',
   'pdf-operation-error',
 
-  // ASCII Art Generator
-  'show-ascii-generator-window',
-  'show-ascii-generator',
-
   // Table Generator
-  'show-table-generator-window',
 
   // Header/Footer dialog
   'open-header-footer-dialog',
@@ -232,9 +219,13 @@ const ALLOWED_RECEIVE_CHANNELS = [
 
   // v4 menu-triggered events
   'load-template-menu',
-  'toggle-command-palette',
   'toggle-sidebar-panel',
-  'toggle-bottom-panel'
+  'toggle-bottom-panel',
+
+  // File dialog / directory listing
+  'list-directory',
+  'pick-folder',
+  'pick-file'
 ];
 
 /**
@@ -341,7 +332,10 @@ contextBridge.exposeInMainWorld('electronAPI', {
     exists: (filePath) => ipcRenderer.invoke('path-exists', filePath),
     isDirectory: (filePath) => ipcRenderer.invoke('is-directory', filePath),
     copy: (source, destination) => ipcRenderer.invoke('copy-path', { source, destination }),
-    move: (source, destination) => ipcRenderer.invoke('move-path', { source, destination })
+    move: (source, destination) => ipcRenderer.invoke('move-path', { source, destination }),
+    list: (dirPath) => ipcRenderer.invoke('list-directory', dirPath),
+    pickFolder: () => ipcRenderer.invoke('pick-folder'),
+    pickFile: () => ipcRenderer.invoke('pick-file')
   },
 
   // Theme Operations
@@ -429,11 +423,7 @@ contextBridge.exposeInMainWorld('electronAPI', {
     toGif: (data) => ipcRenderer.send('video-gif', data)
   },
 
-  // Generator Windows
-  generators: {
-    openAscii: () => ipcRenderer.send('open-ascii-generator'),
-    openTable: () => ipcRenderer.send('open-table-generator')
-  }
+  getAppVersion: () => ipcRenderer.invoke('get-app-version')
 });
 
 // Log successful preload initialization

src/print-preview.js

@@ -1,138 +0,0 @@
-class PrintPreview {
-    constructor() {
-        this.overlay = document.getElementById('print-preview-overlay');
-        this.modal = window.modals?.printPreviewModal;
-        this._lastContent = '';
-        this.setupEventListeners();
-    }
-
-    open(htmlContent) {
-        this._lastContent = htmlContent;
-        if (this.modal) {
-            this.modal.open();
-        } else {
-            this.overlay.classList.remove('hidden');
-        }
-        this.updatePreview(htmlContent);
-        this.updateScaleLabel();
-    }
-
-    close() {
-        if (this.modal) {
-            this.modal.close();
-        } else {
-            this.overlay.classList.add('hidden');
-        }
-    }
-
-    setupEventListeners() {
-        document.getElementById('print-preview-close')?.addEventListener('click', () => this.close());
-        document.getElementById('print-cancel')?.addEventListener('click', () => this.close());
-        document.getElementById('print-execute')?.addEventListener('click', () => this.executePrint());
-
-        // Update preview on option changes
-        ['print-paper-size', 'print-orientation', 'print-margins'].forEach(id => {
-            document.getElementById(id)?.addEventListener('change', () => this.refreshPreview());
-        });
-
-        // Scale slider
-        const scaleSlider = document.getElementById('print-scale');
-        scaleSlider?.addEventListener('input', () => this.updateScaleLabel());
-
-        // Page range toggle
-        document.getElementById('print-pages')?.addEventListener('change', (e) => {
-            const rangeInput = document.getElementById('print-page-range');
-            if (rangeInput) {
-                rangeInput.classList.toggle('hidden', e.target.value !== 'custom');
-            }
-        });
-
-        // Note: Backdrop click and Escape key are now handled by ModalManager
-    }
-
-    updateScaleLabel() {
-        const scale = document.getElementById('print-scale')?.value || 100;
-        const label = document.getElementById('print-scale-value');
-        if (label) label.textContent = `${scale}%`;
-    }
-
-    updatePreview(htmlContent) {
-        const frame = document.getElementById('print-preview-frame');
-        if (!frame) return;
-
-        this._lastContent = htmlContent;
-
-        const orientation = document.getElementById('print-orientation')?.value || 'portrait';
-        const paperSize = document.getElementById('print-paper-size')?.value || 'A4';
-
-        // Get dimensions for paper size
-        const sizes = {
-            'A3': { width: '297mm', height: '420mm' },
-            'A4': { width: '210mm', height: '297mm' },
-            'A5': { width: '148mm', height: '210mm' },
-            'Letter': { width: '8.5in', height: '11in' },
-            'Legal': { width: '8.5in', height: '14in' },
-            'Tabloid': { width: '11in', height: '17in' },
-        };
-
-        const size = sizes[paperSize] || sizes['A4'];
-        const width = orientation === 'landscape' ? size.height : size.width;
-        const height = orientation === 'landscape' ? size.width : size.height;
-
-        const previewHtml = `
-            <!DOCTYPE html>
-            <html>
-            <head>
-                <style>
-                    body {
-                        margin: 20px;
-                        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
-                        font-size: 14px;
-                        line-height: 1.6;
-                    }
-                    @page { size: ${width} ${height}; }
-                    pre { background: #f5f5f5; padding: 12px; border-radius: 6px; overflow-x: auto; }
-                    code { background: #f0f0f0; padding: 2px 6px; border-radius: 3px; font-size: 13px; }
-                    pre code { background: none; padding: 0; }
-                    table { border-collapse: collapse; width: 100%; }
-                    th, td { border: 1px solid #ddd; padding: 8px; }
-                    blockquote { border-left: 4px solid #ddd; margin-left: 0; padding-left: 16px; color: #666; }
-                    img { max-width: 100%; }
-                    h1, h2, h3 { margin-top: 1.5em; }
-                </style>
-            </head>
-            <body>${htmlContent || ''}</body>
-            </html>
-        `;
-
-        frame.srcdoc = previewHtml;
-    }
-
-    refreshPreview() {
-        if (this._lastContent) {
-            this.updatePreview(this._lastContent);
-        }
-    }
-
-    getOptions() {
-        return {
-            paperSize: document.getElementById('print-paper-size')?.value || 'A4',
-            orientation: document.getElementById('print-orientation')?.value || 'portrait',
-            margins: document.getElementById('print-margins')?.value || 'default',
-            scale: parseInt(document.getElementById('print-scale')?.value || '100'),
-            headers: document.getElementById('print-headers')?.checked ?? true,
-            background: document.getElementById('print-background')?.checked ?? true,
-            pages: document.getElementById('print-pages')?.value || 'all',
-            pageRange: document.getElementById('print-page-range')?.value || '',
-        };
-    }
-
-    executePrint() {
-        const options = this.getOptions();
-        const { ipcRenderer } = require('electron');
-        ipcRenderer.send('do-print-with-options', options);
-        this.close();
-    }
-}
-
-module.exports = { PrintPreview };

src/renderer/App.tsx

@@ -0,0 +1,29 @@
+import { useState, useEffect } from 'react';
+import { AppShell } from './components/layout/AppShell';
+import { ModalLayer } from './components/modals/ModalLayer';
+import { Toaster } from './components/ui/sonner';
+import { ReplPanel } from './components/tools/ReplPanel';
+import { PrintPreview } from './components/tools/PrintPreview';
+import { useWelcomeTrigger } from './hooks/use-welcome-trigger';
+
+function App() {
+  useWelcomeTrigger();
+  const [printOpen, setPrintOpen] = useState(false);
+
+  useEffect(() => {
+    const handler = () => setPrintOpen(true);
+    window.addEventListener('mc:print', handler);
+    return () => window.removeEventListener('mc:print', handler);
+  }, []);
+
+  return (
+    <>
+      <AppShell />
+      <ModalLayer />
+      <Toaster />
+      <ReplPanel />
+      {printOpen && <PrintPreview onClose={() => setPrintOpen(false)} />}
+    </>
+  );
+}
+export default App;

src/renderer/components/editor/CodeMirrorEditor.tsx

@@ -0,0 +1,88 @@
+import { useEffect, useRef } from 'react';
+import { EditorState, Compartment } from '@codemirror/state';
+import { EditorView, keymap, lineNumbers, highlightActiveLine, drawSelection } from '@codemirror/view';
+import { defaultKeymap, history, historyKeymap, indentWithTab } from '@codemirror/commands';
+import { markdown, markdownLanguage } from '@codemirror/lang-markdown';
+import { searchKeymap, highlightSelectionMatches } from '@codemirror/search';
+import { autocompletion, completionKeymap } from '@codemirror/autocomplete';
+import { oneDark } from '@codemirror/theme-one-dark';
+import { useTheme } from 'next-themes';
+import { lightTheme, lightHighlight } from './themes/light';
+import { useEditorStore } from '@/stores/editor-store';
+import { useSettingsStore } from '@/stores/settings-store';
+import { Minimap } from './Minimap';
+
+interface Props {
+  bufferId: string;
+  initialContent: string;
+  onChange?: (content: string) => void;
+  onCursorChange?: (line: number, column: number) => void;
+}
+
+export function CodeMirrorEditor({ bufferId, initialContent, onChange, onCursorChange }: Props) {
+  const ref = useRef<HTMLDivElement>(null);
+  const viewRef = useRef<EditorView | null>(null);
+  const themeCompartment = useRef(new Compartment());
+  const { resolvedTheme } = useTheme();
+  const updateContent = useEditorStore((s) => s.updateContent);
+  const setCursor = useEditorStore((s) => s.setCursor);
+  const minimap = useSettingsStore((s) => s.minimap);
+
+  useEffect(() => {
+    if (!ref.current) return;
+    const state = EditorState.create({
+      doc: initialContent,
+      extensions: [
+        lineNumbers(),
+        highlightActiveLine(),
+        highlightSelectionMatches(),
+        history(),
+        drawSelection(),
+        markdown({ base: markdownLanguage, codeLanguages: [] }),
+        autocompletion(),
+        keymap.of([...defaultKeymap, ...historyKeymap, ...searchKeymap, ...completionKeymap, indentWithTab]),
+        themeCompartment.current.of(resolvedTheme === 'dark' ? [oneDark] : [lightTheme, lightHighlight]),
+        EditorView.lineWrapping,
+        EditorView.updateListener.of((v) => {
+          if (v.docChanged) {
+            const content = v.state.doc.toString();
+            updateContent(bufferId, content);
+            onChange?.(content);
+          }
+          if (v.selectionSet || v.docChanged) {
+            const head = v.state.selection.main.head;
+            const line = v.state.doc.lineAt(head);
+            const lineNo = line.number;
+            const col = head - line.from + 1;
+            setCursor(bufferId, lineNo, col);
+            onCursorChange?.(lineNo, col);
+          }
+        }),
+      ],
+    });
+    const view = new EditorView({ state, parent: ref.current });
+    viewRef.current = view;
+    return () => {
+      view.destroy();
+      viewRef.current = null;
+    };
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [bufferId]);
+
+  useEffect(() => {
+    const view = viewRef.current;
+    if (!view) return;
+    view.dispatch({
+      effects: themeCompartment.current.reconfigure(
+        resolvedTheme === 'dark' ? [oneDark] : [lightTheme, lightHighlight]
+      ),
+    });
+  }, [resolvedTheme]);
+
+  return (
+    <div className="relative h-full overflow-hidden">
+      <div ref={ref} className="h-full overflow-hidden" />
+      {minimap && <Minimap content={initialContent} />}
+    </div>
+  );
+}

src/renderer/components/editor/EditorPane.tsx

@@ -0,0 +1,32 @@
+import { useEffect } from 'react';
+import { CodeMirrorEditor } from './CodeMirrorEditor';
+import { useEditorStore } from '@/stores/editor-store';
+import { usePreviewStore } from '@/stores/preview-store';
+
+export function EditorPane() {
+  const { buffers, activeId } = useEditorStore();
+  const buf = activeId ? buffers.get(activeId) : null;
+  const setPreviewSource = usePreviewStore((s) => s.setSource);
+
+  useEffect(() => {
+    if (buf) setPreviewSource(buf.content);
+  }, [buf?.id, buf?.content, buf, setPreviewSource]);
+
+  if (!buf) {
+    return (
+      <div className="flex h-full items-center justify-center bg-background text-muted-foreground">
+        <p>No file open. Use File → Open to start.</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="h-full">
+      <CodeMirrorEditor
+        key={buf.id}
+        bufferId={buf.id}
+        initialContent={buf.content}
+      />
+    </div>
+  );
+}

src/renderer/components/editor/Minimap.tsx

@@ -0,0 +1,33 @@
+interface Props {
+  content: string;
+  scrollRatio?: number;       // 0-1, where the viewport is
+  visibleRatio?: number;      // 0-1, what fraction of content is visible
+}
+
+export function Minimap({ content, scrollRatio = 0, visibleRatio = 1 }: Props) {
+  const lines = content.split('\n');
+  // Compute viewport position in the minimap
+  const viewportTop = Math.round(scrollRatio * 100);
+  const viewportHeight = Math.round(visibleRatio * 100);
+
+  return (
+    <div
+      data-testid="minimap"
+      className="pointer-events-none absolute right-0 top-0 h-full w-[100px] overflow-hidden border-l border-border bg-card/30 p-1 font-mono text-[6px] leading-[8px] text-muted-foreground"
+      aria-hidden="true"
+    >
+      <pre className="w-full truncate whitespace-pre">
+        {lines.map((line, i) => (
+          <div key={i} data-testid="minimap-line">
+            {line || ' '}
+          </div>
+        ))}
+      </pre>
+      <div
+        data-testid="minimap-viewport"
+        className="pointer-events-none absolute left-0 right-0 bg-brand/15"
+        style={{ top: `${viewportTop}%`, height: `${Math.max(viewportHeight, 5)}%` }}
+      />
+    </div>
+  );
+}

src/renderer/components/editor/themes/light.ts

@@ -0,0 +1,55 @@
+import { EditorView } from '@codemirror/view';
+import { HighlightStyle, syntaxHighlighting } from '@codemirror/language';
+import { tags as t } from '@lezer/highlight';
+
+const colors = {
+  background: '#ffffff',
+  foreground: '#0d0b09',
+  cursor: '#e5461f',
+  selection: 'rgba(229, 70, 31, 0.15)',
+  gutterBackground: '#fafbfc',
+  gutterForeground: '#7a7878',
+  lineHighlight: 'rgba(0, 0, 0, 0.04)',
+};
+
+export const lightTheme = EditorView.theme(
+  {
+    '&': {
+      backgroundColor: colors.background,
+      color: colors.foreground,
+      height: '100%',
+    },
+    '.cm-content': {
+      caretColor: colors.cursor,
+      fontFamily: 'JetBrains Mono, Fira Code, monospace',
+      fontSize: '13.5px',
+    },
+    '.cm-cursor, .cm-dropCursor': { borderLeftColor: colors.cursor },
+    '&.cm-focused .cm-selectionBackground, .cm-selectionBackground, ::selection': {
+      backgroundColor: colors.selection,
+    },
+    '.cm-gutters': {
+      backgroundColor: colors.gutterBackground,
+      color: colors.gutterForeground,
+      border: 'none',
+    },
+    '.cm-activeLine': { backgroundColor: colors.lineHighlight },
+    '.cm-activeLineGutter': { backgroundColor: 'transparent', color: '#e5461f' },
+  },
+  { dark: false }
+);
+
+const highlightStyle = HighlightStyle.define([
+  { tag: t.heading1, color: '#0d0b09', fontWeight: '700' },
+  { tag: t.heading2, color: '#0d0b09', fontWeight: '700' },
+  { tag: t.heading3, color: '#464646', fontWeight: '600' },
+  { tag: t.link, color: '#e5461f', textDecoration: 'underline' },
+  { tag: t.url, color: '#e5461f' },
+  { tag: t.emphasis, fontStyle: 'italic' },
+  { tag: t.strong, fontWeight: '700' },
+  { tag: t.monospace, color: '#c93a18' },
+  { tag: t.list, color: '#0ea5e9' },
+  { tag: t.quote, color: '#7a7878', fontStyle: 'italic' },
+]);
+
+export const lightHighlight = syntaxHighlighting(highlightStyle);

src/renderer/components/layout/AppHeader.tsx

@@ -0,0 +1,70 @@
+import { PanelLeft, PanelRight, Keyboard, Settings, Info } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { ThemeToggle } from '@/components/theme-toggle';
+import { useAppStore } from '@/stores/app-store';
+import { useCommandStore } from '@/stores/command-store';
+
+export function AppHeader() {
+  const { sidebarVisible, previewVisible } = useAppStore();
+  const dispatch = useCommandStore((s) => s.dispatch);
+
+  return (
+    <header className="flex h-14 items-center justify-between border-b border-border bg-card/40 px-4 backdrop-blur">
+      <div className="flex items-center gap-3">
+        <div
+          className="h-7 w-7 rounded-md bg-gradient-to-br from-brand to-brand-dark shadow-[var(--shadow-glow-brand)]"
+          aria-label="MarkdownConverter logo"
+        />
+        <h1 className="font-display text-lg font-bold tracking-tight">MarkdownConverter</h1>
+      </div>
+      <div className="flex items-center gap-1">
+        <Button
+          variant="ghost"
+          size="icon"
+          aria-label="Toggle sidebar"
+          aria-pressed={sidebarVisible}
+          data-testid="header-toggle-sidebar"
+          onClick={() => dispatch('view.toggleSidebar')}
+        >
+          <PanelLeft className="h-4 w-4" />
+        </Button>
+        <Button
+          variant="ghost"
+          size="icon"
+          aria-label="Toggle preview"
+          aria-pressed={previewVisible}
+          data-testid="header-toggle-preview"
+          onClick={() => dispatch('view.togglePreview')}
+        >
+          <PanelRight className="h-4 w-4" />
+        </Button>
+        <Button
+          variant="ghost"
+          size="icon"
+          aria-label="Keyboard shortcuts"
+          data-testid="header-shortcuts"
+          onClick={() => dispatch('shortcuts.show')}
+        >
+          <Keyboard className="h-4 w-4" />
+        </Button>
+        <Button
+          variant="ghost"
+          size="icon"
+          aria-label="Settings"
+          onClick={() => dispatch('settings.open')}
+        >
+          <Settings className="h-4 w-4" />
+        </Button>
+        <Button
+          variant="ghost"
+          size="icon"
+          aria-label="About"
+          onClick={() => dispatch('help.about')}
+        >
+          <Info className="h-4 w-4" />
+        </Button>
+        <ThemeToggle />
+      </div>
+    </header>
+  );
+}

src/renderer/components/layout/AppShell.tsx

@@ -0,0 +1,89 @@
+import { AppHeader } from './AppHeader';
+import { TabBar } from './TabBar';
+import { Toolbar } from './Toolbar';
+import { Breadcrumb } from './Breadcrumb';
+import { StatusBar } from './StatusBar';
+import { EditorPane } from '@/components/editor/EditorPane';
+import { PreviewPane } from '@/components/preview/PreviewPane';
+import { Sidebar } from '@/components/sidebar/Sidebar';
+import { useAppStore } from '@/stores/app-store';
+import { ResizablePanelGroup, ResizablePanel, ResizableHandle } from '@/components/ui/resizable';
+import { useFileShortcuts } from '@/hooks/use-file-shortcuts';
+import { useRestoreLastFolder } from '@/hooks/use-restore-last-folder';
+import { useRegisterMenuCommands, useBridgeNativeMenu } from '@/lib/commands/register-menu-commands';
+import { useZenMode } from '@/hooks/use-zen-mode';
+
+export function AppShell() {
+  useFileShortcuts();
+  useRestoreLastFolder();
+  useRegisterMenuCommands();
+  useBridgeNativeMenu();
+  useZenMode();
+  const { sidebarVisible, previewVisible, paneSizes, setPaneSizes } = useAppStore();
+  const zenMode = useAppStore((s) => s.zenMode);
+
+  if (zenMode) {
+    return (
+      <main className="h-screen w-screen overflow-hidden bg-background">
+        <ResizablePanelGroup
+          direction="horizontal"
+          onLayout={(sizes) => setPaneSizes({ sidebar: 0, editor: sizes[0], preview: sizes[1] })}
+        >
+          <ResizablePanel defaultSize={previewVisible ? 50 : 100} minSize={20}>
+            <section className="h-full bg-background">
+              <EditorPane />
+            </section>
+          </ResizablePanel>
+          {previewVisible && (
+            <>
+              <ResizableHandle />
+              <ResizablePanel defaultSize={50} minSize={20}>
+                <section className="h-full border-l border-border bg-card/10">
+                  <PreviewPane />
+                </section>
+              </ResizablePanel>
+            </>
+          )}
+        </ResizablePanelGroup>
+      </main>
+    );
+  }
+
+  return (
+    <div className="flex h-screen flex-col bg-background text-foreground">
+      <AppHeader />
+      <TabBar />
+      <Toolbar />
+      <Breadcrumb />
+      <main className="flex-1 overflow-hidden">
+        <ResizablePanelGroup
+          direction="horizontal"
+          onLayout={(sizes) => setPaneSizes({ sidebar: sizes[0], editor: sizes[1], preview: sizes[2] })}
+        >
+          {sidebarVisible && (
+            <>
+              <ResizablePanel defaultSize={paneSizes.sidebar} minSize={15} maxSize={40}>
+                <aside className="h-full border-r border-border bg-card/10 p-3 text-sm text-muted-foreground">
+                  <Sidebar />
+                </aside>
+              </ResizablePanel>
+              <ResizableHandle />
+            </>
+          )}
+          <ResizablePanel defaultSize={previewVisible ? paneSizes.editor : 100} minSize={20}>
+            <EditorPane />
+          </ResizablePanel>
+          {previewVisible && (
+            <>
+              <ResizableHandle />
+              <ResizablePanel defaultSize={paneSizes.preview} minSize={20}>
+                <PreviewPane />
+              </ResizablePanel>
+            </>
+          )}
+        </ResizablePanelGroup>
+      </main>
+      <StatusBar />
+    </div>
+  );
+}

src/renderer/components/layout/Breadcrumb.tsx

@@ -0,0 +1,38 @@
+import { useFileStore } from '@/stores/file-store';
+import { useEditorStore } from '@/stores/editor-store';
+import { useSettingsStore } from '@/stores/settings-store';
+
+function extractHeadings(content: string): { level: number; text: string }[] {
+  const lines = content.split('\n');
+  const headings: { level: number; text: string }[] = [];
+  for (const line of lines) {
+    const m = line.match(/^(#{1,6})\s+(.+)$/);
+    if (m) headings.push({ level: m[1].length, text: m[2].trim() });
+  }
+  return headings;
+}
+
+export function Breadcrumb() {
+  const activeTabId = useFileStore((s) => s.activeTabId);
+  const openTabs = useFileStore((s) => s.openTabs);
+  const buffer = useEditorStore((s) => (activeTabId ? s.buffers.get(activeTabId) : undefined));
+  const showSymbols = useSettingsStore((s) => s.breadcrumbSymbols);
+
+  const tab = activeTabId ? openTabs.find((t) => t.id === activeTabId) : null;
+  const headings = showSymbols && buffer ? extractHeadings(buffer.content).slice(0, 3) : [];
+
+  return (
+    <nav
+      aria-label="File path"
+      className="flex h-7 items-center gap-1 border-b border-border bg-card/10 px-3 text-xs text-muted-foreground"
+    >
+      <span>{tab ? tab.title : 'No file selected'}</span>
+      {headings.map((h, i) => (
+        <span key={i} className="flex items-center gap-1">
+          <span aria-hidden="true">›</span>
+          <span className="truncate">{'#'.repeat(h.level)} {h.text}</span>
+        </span>
+      ))}
+    </nav>
+  );
+}

src/renderer/components/layout/StatusBar.tsx

@@ -0,0 +1,25 @@
+import { useEditorStore } from '@/stores/editor-store';
+
+function countWords(text: string): number {
+  return text.trim().length === 0 ? 0 : text.trim().split(/\s+/).length;
+}
+
+export function StatusBar() {
+  const { buffers, activeId } = useEditorStore();
+  const buf = activeId ? buffers.get(activeId) : null;
+  const wordCount = buf ? countWords(buf.content) : 0;
+  const cursor = buf?.cursor ?? { line: 1, column: 1 };
+
+  return (
+    <footer className="flex h-7 items-center justify-between border-t border-border bg-card/20 px-3 text-xs text-muted-foreground">
+      <div className="flex items-center gap-4">
+        <span>{wordCount} words</span>
+        <span>UTF-8</span>
+      </div>
+      <div className="flex items-center gap-4">
+        <span>Ln {cursor.line}, Col {cursor.column}</span>
+        <span>Markdown</span>
+      </div>
+    </footer>
+  );
+}

src/renderer/components/layout/TabBar.tsx

@@ -0,0 +1,127 @@
+import { X } from 'lucide-react';
+import {
+  DndContext,
+  PointerSensor,
+  useSensor,
+  useSensors,
+  closestCenter,
+  type DragEndEvent,
+} from '@dnd-kit/core';
+import {
+  SortableContext,
+  horizontalListSortingStrategy,
+  useSortable,
+} from '@dnd-kit/sortable';
+import { CSS } from '@dnd-kit/utilities';
+import { useFileStore, type OpenTab } from '@/stores/file-store';
+import { cn } from '@/lib/utils';
+
+function SortableTab({
+  tab,
+  isActive,
+  onSelect,
+  onClose,
+}: {
+  tab: OpenTab;
+  isActive: boolean;
+  onSelect: (id: string) => void;
+  onClose: (id: string) => void;
+}) {
+  const { attributes, listeners, setNodeRef, transform, transition, isDragging } = useSortable({
+    id: tab.id,
+  });
+
+  const style = {
+    transform: CSS.Transform.toString(transform),
+    transition,
+    opacity: isDragging ? 0.5 : 1,
+  };
+
+  return (
+    <div
+      ref={setNodeRef}
+      style={style}
+      {...attributes}
+      {...listeners}
+      role="tab"
+      aria-selected={isActive}
+      aria-current={isActive ? 'page' : undefined}
+      data-testid={`tab-${tab.id}`}
+      className={cn(
+        'group flex h-full cursor-pointer select-none items-center gap-1 border-r border-border px-3 text-xs transition-colors',
+        isActive
+          ? 'bg-accent text-accent-foreground'
+          : 'text-muted-foreground hover:bg-muted/50 hover:text-foreground'
+      )}
+      onClick={() => onSelect(tab.id)}
+    >
+      {tab.dirty && (
+        <span
+          className="h-1.5 w-1.5 shrink-0 rounded-full bg-primary"
+          aria-label="Unsaved changes"
+        />
+      )}
+      <span className="max-w-[120px] truncate">{tab.title}</span>
+      <button
+        aria-label={`Close ${tab.title}`}
+        className="ml-1 flex h-4 w-4 shrink-0 items-center justify-center rounded opacity-0 group-hover:opacity-100 hover:bg-muted-foreground/20 transition-opacity"
+        onPointerDown={(e) => e.stopPropagation()}
+        onClick={(e) => {
+          e.stopPropagation();
+          onClose(tab.id);
+        }}
+      >
+        <X className="h-3 w-3" />
+      </button>
+    </div>
+  );
+}
+
+export function TabBar() {
+  const openTabs = useFileStore((s) => s.openTabs);
+  const activeTabId = useFileStore((s) => s.activeTabId);
+  const setActiveTab = useFileStore((s) => s.setActiveTab);
+  const closeTab = useFileStore((s) => s.closeTab);
+  const reorderTabs = useFileStore((s) => s.reorderTabs);
+
+  // Require a small drag distance before activating — so a click on the tab
+  // body still triggers `onClick` (dnd-kit's PointerSensor default is 0).
+  const sensors = useSensors(useSensor(PointerSensor, { activationConstraint: { distance: 6 } }));
+
+  if (openTabs.length === 0) {
+    return (
+      <div className="flex h-9 items-center border-b border-border bg-card/20 px-3 text-xs text-muted-foreground">
+        <span>No files open</span>
+      </div>
+    );
+  }
+
+  function handleDragEnd(e: DragEndEvent) {
+    const { active, over } = e;
+    if (!over || active.id === over.id) return;
+    const fromIndex = openTabs.findIndex((t) => t.id === active.id);
+    const toIndex = openTabs.findIndex((t) => t.id === over.id);
+    if (fromIndex === -1 || toIndex === -1) return;
+    reorderTabs(fromIndex, toIndex);
+  }
+
+  return (
+    <div className="flex h-9 items-center border-b border-border bg-card/20 overflow-x-auto">
+      <DndContext sensors={sensors} collisionDetection={closestCenter} onDragEnd={handleDragEnd}>
+        <SortableContext items={openTabs.map((t) => t.id)} strategy={horizontalListSortingStrategy}>
+          <div className="flex h-full items-center px-1">
+            {openTabs.map((tab) => (
+              <SortableTab
+                key={tab.id}
+                tab={tab}
+                isActive={tab.id === activeTabId}
+                onSelect={setActiveTab}
+                onClose={closeTab}
+              />
+            ))}
+          </div>
+        </SortableContext>
+      </DndContext>
+    </div>
+  );
+}

src/renderer/components/layout/Toolbar.tsx

@@ -0,0 +1,77 @@
+import { Bold, Italic, List, ListOrdered, Code, Link as LinkIcon, PanelLeft, PanelRight, Save, FolderOpen, FileText } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { useCommandStore } from '@/stores/command-store';
+import { useAppStore } from '@/stores/app-store';
+
+export function Toolbar() {
+  const dispatch = useCommandStore((s) => s.dispatch);
+  const { sidebarVisible, previewVisible } = useAppStore();
+
+  return (
+    <div
+      role="toolbar"
+      aria-label="Main toolbar"
+      className="flex h-10 items-center gap-1 border-b border-border bg-card/10 px-3"
+    >
+      <Button
+        variant="ghost"
+        size="icon"
+        aria-label="Open file"
+        data-testid="toolbar-open-file"
+        onClick={() => dispatch('file.open')}
+      >
+        <FileText className="h-4 w-4" />
+      </Button>
+      <Button
+        variant="ghost"
+        size="icon"
+        aria-label="Open folder"
+        data-testid="toolbar-open-folder"
+        onClick={() => dispatch('file.openFolder')}
+      >
+        <FolderOpen className="h-4 w-4" />
+      </Button>
+      <Button
+        variant="ghost"
+        size="icon"
+        aria-label="Save"
+        data-testid="toolbar-save"
+        onClick={() => dispatch('file.save')}
+      >
+        <Save className="h-4 w-4" />
+      </Button>
+
+      <div className="mx-1 h-5 w-px bg-border" aria-hidden="true" />
+
+      <Button
+        variant="ghost"
+        size="icon"
+        aria-label="Toggle sidebar"
+        aria-pressed={sidebarVisible}
+        data-testid="toolbar-toggle-sidebar"
+        onClick={() => dispatch('view.toggleSidebar')}
+      >
+        <PanelLeft className="h-4 w-4" />
+      </Button>
+      <Button
+        variant="ghost"
+        size="icon"
+        aria-label="Toggle preview"
+        aria-pressed={previewVisible}
+        data-testid="toolbar-toggle-preview"
+        onClick={() => dispatch('view.togglePreview')}
+      >
+        <PanelRight className="h-4 w-4" />
+      </Button>
+
+      <div className="mx-1 h-5 w-px bg-border" aria-hidden="true" />
+
+      <Button variant="ghost" size="icon" aria-label="Bold" disabled><Bold className="h-4 w-4" /></Button>
+      <Button variant="ghost" size="icon" aria-label="Italic" disabled><Italic className="h-4 w-4" /></Button>
+      <Button variant="ghost" size="icon" aria-label="Unordered list" disabled><List className="h-4 w-4" /></Button>
+      <Button variant="ghost" size="icon" aria-label="Ordered list" disabled><ListOrdered className="h-4 w-4" /></Button>
+      <Button variant="ghost" size="icon" aria-label="Code" disabled><Code className="h-4 w-4" /></Button>
+      <Button variant="ghost" size="icon" aria-label="Link" disabled><LinkIcon className="h-4 w-4" /></Button>
+    </div>
+  );
+}

src/renderer/components/modals/AboutDialog.tsx

@@ -0,0 +1,49 @@
+import { useEffect, useState } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Button } from '@/components/ui/button';
+import { ipc } from '@/lib/ipc';
+import { useAppStore } from '@/stores/app-store';
+
+export function AboutDialog() {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const isOpen = useAppStore((s) => s.modal.kind) === 'about';
+  const [version, setVersion] = useState<string>('…');
+
+  useEffect(() => {
+    ipc.app.getVersion().then((r) => {
+      if (r.ok && typeof r.data === 'string') setVersion(r.data);
+    });
+  }, []);
+
+  return (
+    <Dialog open={isOpen} onOpenChange={(o) => !o && closeModal()}>
+      <DialogContent aria-describedby="about-desc">
+        <DialogHeader>
+          <DialogTitle>About MarkdownConverter</DialogTitle>
+          <DialogDescription id="about-desc">
+            Professional Markdown editor and universal file converter.
+          </DialogDescription>
+        </DialogHeader>
+        <div className="space-y-2 text-sm text-muted-foreground">
+          <p>Version: {version}</p>
+          <p>
+            <a
+              href="https://github.com/amitwh/markdown-converter"
+              className="text-brand hover:underline"
+              onClick={(e) => {
+                e.preventDefault();
+                ipc.app.openExternal('https://github.com/amitwh/markdown-converter');
+              }}
+            >
+              GitHub repository
+            </a>
+          </p>
+          <p className="text-xs">© ConcreteInfo. Licensed under MIT.</p>
+        </div>
+        <DialogFooter>
+          <Button onClick={closeModal}>Close</Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/AboutSettings.tsx

@@ -0,0 +1,38 @@
+import { useEffect, useState } from 'react';
+import { ipc } from '@/lib/ipc';
+
+export function AboutSettings() {
+  const [version, setVersion] = useState('…');
+
+  useEffect(() => {
+    ipc.app.getVersion().then((r) => {
+      if (r.ok && typeof r.data === 'string') setVersion(r.data);
+    });
+  }, []);
+
+  return (
+    <div className="space-y-3 text-sm">
+      <h3 className="text-base font-semibold">MarkdownConverter</h3>
+      <p className="text-muted-foreground">Version {version}</p>
+      <p>
+        <a
+          href="https://github.com/amitwh/markdown-converter"
+          className="text-brand hover:underline"
+          onClick={(e) => { e.preventDefault(); ipc.app.openExternal('https://github.com/amitwh/markdown-converter'); }}
+        >
+          GitHub repository
+        </a>
+      </p>
+      <p>
+        <a
+          href="https://concreteinfo.co.in"
+          className="text-brand hover:underline"
+          onClick={(e) => { e.preventDefault(); ipc.app.openExternal('https://concreteinfo.co.in'); }}
+        >
+          ConcreteInfo
+        </a>
+      </p>
+      <p className="text-xs text-muted-foreground">© ConcreteInfo. Licensed under MIT.</p>
+    </div>
+  );
+}

src/renderer/components/modals/AsciiGeneratorDialog.tsx

@@ -0,0 +1,77 @@
+import { useState, useEffect } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Button } from '@/components/ui/button';
+import { Label } from '@/components/ui/label';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+import { Textarea } from '@/components/ui/textarea';
+import { useAppStore } from '@/stores/app-store';
+import { toast } from '@/lib/toast';
+import { figletText, FIGLET_FONTS, type FigletFont } from '@/lib/figlet';
+
+export function AsciiGeneratorDialog() {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const [text, setText] = useState('Hello');
+  const [font, setFont] = useState<FigletFont>('Standard');
+  const [output, setOutput] = useState('');
+
+  useEffect(() => {
+    let cancelled = false;
+    figletText(text || ' ', font)
+      .then((result) => { if (!cancelled) setOutput(result); })
+      .catch(() => { if (!cancelled) setOutput('(render error)'); });
+    return () => { cancelled = true; };
+  }, [text, font]);
+
+  const handleCopy = async () => {
+    try {
+      await navigator.clipboard.writeText(output);
+      toast.success('Copied to clipboard');
+    } catch {
+      toast.error('Failed to copy');
+    }
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && closeModal()}>
+      <DialogContent aria-describedby="ascii-desc" className="max-w-2xl">
+        <DialogHeader>
+          <DialogTitle>ASCII generator</DialogTitle>
+          <DialogDescription id="ascii-desc">Type text, pick a font, see ASCII art</DialogDescription>
+        </DialogHeader>
+        <div className="space-y-3">
+          <div>
+            <Label htmlFor="ascii-text">Text</Label>
+            <Textarea
+              id="ascii-text"
+              aria-label="Text"
+              value={text}
+              onChange={(e) => setText(e.target.value)}
+              rows={2}
+            />
+          </div>
+          <div>
+            <Label htmlFor="ascii-font">Font</Label>
+            <Select value={font} onValueChange={(v) => setFont(v as FigletFont)}>
+              <SelectTrigger id="ascii-font" aria-label="Font"><SelectValue /></SelectTrigger>
+              <SelectContent>
+                {FIGLET_FONTS.map((f) => (
+                  <SelectItem key={f} value={f}>{f}</SelectItem>
+                ))}
+              </SelectContent>
+            </Select>
+          </div>
+          <div>
+            <Label>Output</Label>
+            <pre className="overflow-auto rounded border border-border bg-card/30 p-3 text-xs" data-testid="ascii-output">
+              {output}
+            </pre>
+          </div>
+        </div>
+        <DialogFooter>
+          <Button variant="ghost" onClick={closeModal}>Close</Button>
+          <Button onClick={handleCopy}>Copy</Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/ConfirmDialog.tsx

@@ -0,0 +1,36 @@
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Button } from '@/components/ui/button';
+import { useAppStore, type ConfirmProps } from '@/stores/app-store';
+
+export function ConfirmDialog(props: ConfirmProps) {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const { title, body, confirmLabel = 'Confirm', cancelLabel = 'Cancel', destructive, onConfirm, onCancel } = props;
+
+  const handleConfirm = async () => {
+    await onConfirm();
+    closeModal();
+  };
+  const handleCancel = () => {
+    onCancel?.();
+    closeModal();
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && handleCancel()}>
+      <DialogContent aria-describedby="confirm-body">
+        <DialogHeader>
+          <DialogTitle>{title}</DialogTitle>
+          <DialogDescription id="confirm-body">{body}</DialogDescription>
+        </DialogHeader>
+        <DialogFooter>
+          <Button variant="ghost" onClick={handleCancel}>
+            {cancelLabel}
+          </Button>
+          <Button variant={destructive ? 'destructive' : 'default'} onClick={handleConfirm}>
+            {confirmLabel}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/EditorSettings.tsx

@@ -0,0 +1,41 @@
+import { useSettingsStore } from '@/stores/settings-store';
+import { Label } from '@/components/ui/label';
+import { Slider } from '@/components/ui/slider';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+import { Switch } from '@/components/ui/switch';
+
+export function EditorSettings() {
+  const { fontSize, tabSize, lineNumbers, wordWrap, minimap, setSetting } = useSettingsStore();
+
+  return (
+    <div className="space-y-5 text-sm">
+      <div>
+        <Label htmlFor="editor-font-size">Font size: {fontSize}px</Label>
+        <Slider id="editor-font-size" min={10} max={24} step={1} value={[fontSize]} onValueChange={([v]) => setSetting('fontSize', v)} />
+      </div>
+      <div>
+        <Label htmlFor="editor-tab-size">Tab size</Label>
+        <Select value={String(tabSize)} onValueChange={(v) => setSetting('tabSize', Number(v) as 2 | 4 | 8)}>
+          <SelectTrigger id="editor-tab-size" aria-label="Tab size"><SelectValue /></SelectTrigger>
+          <SelectContent>
+            <SelectItem value="2">2 spaces</SelectItem>
+            <SelectItem value="4">4 spaces</SelectItem>
+            <SelectItem value="8">8 spaces</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+      <label className="flex items-center justify-between">
+        <span>Line numbers</span>
+        <Switch checked={lineNumbers} onCheckedChange={(c) => setSetting('lineNumbers', c)} aria-label="Line numbers" />
+      </label>
+      <label className="flex items-center justify-between">
+        <span>Word wrap</span>
+        <Switch checked={wordWrap} onCheckedChange={(c) => setSetting('wordWrap', c)} aria-label="Word wrap" />
+      </label>
+      <label className="flex items-center justify-between">
+        <span>Minimap</span>
+        <Switch checked={minimap} onCheckedChange={(c) => setSetting('minimap', c)} aria-label="Minimap" />
+      </label>
+    </div>
+  );
+}

src/renderer/components/modals/ExportBatchDialog.tsx

@@ -0,0 +1,82 @@
+import { useState } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Label } from '@/components/ui/label';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+import { useAppStore } from '@/stores/app-store';
+import { ipc } from '@/lib/ipc';
+import { toast } from '@/lib/toast';
+import { ExportDialogFooter } from './ExportDialogFooter';
+
+const extFor = (format: 'pdf' | 'docx' | 'html' | 'png') =>
+  format === 'pdf' ? '.pdf' : format === 'docx' ? '.docx' : format === 'png' ? '.png' : '.html';
+
+export function ExportBatchDialog({ sourcePaths }: { sourcePaths: string[] }) {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const [format, setFormat] = useState<'pdf' | 'docx' | 'html' | 'png'>('pdf');
+  const [concurrency, setConcurrency] = useState(4);
+  const [submitting, setSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleSubmit = async () => {
+    setSubmitting(true);
+    setError(null);
+    const items = sourcePaths.map((p) => ({
+      inputPath: p,
+      outputPath: p.replace(/\.md$/, extFor(format)),
+    }));
+    const result = await ipc.export.batch(items, { format, concurrency });
+    if (!result.ok) {
+      toast.error(`Export failed: ${result.error.message}`);
+      setError(result.error.message);
+      setSubmitting(false);
+    } else {
+      toast.success(`Exported ${sourcePaths.length} files`);
+      closeModal();
+    }
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && closeModal()}>
+      <DialogContent aria-describedby="batch-desc">
+        <DialogHeader>
+          <DialogTitle>Batch export</DialogTitle>
+          <DialogDescription id="batch-desc">{sourcePaths.length} files</DialogDescription>
+        </DialogHeader>
+        <div className="space-y-3 text-sm">
+          <div>
+            <Label htmlFor="batch-format">Format</Label>
+            <Select value={format} onValueChange={(v) => setFormat(v as any)}>
+              <SelectTrigger id="batch-format" aria-label="Format"><SelectValue /></SelectTrigger>
+              <SelectContent>
+                <SelectItem value="pdf">PDF</SelectItem>
+                <SelectItem value="docx">DOCX</SelectItem>
+                <SelectItem value="html">HTML</SelectItem>
+                <SelectItem value="png">PNG</SelectItem>
+              </SelectContent>
+            </Select>
+          </div>
+          <div>
+            <Label htmlFor="batch-concurrency">Concurrency</Label>
+            <Select value={String(concurrency)} onValueChange={(v) => setConcurrency(Number(v))}>
+              <SelectTrigger id="batch-concurrency" aria-label="Concurrency"><SelectValue /></SelectTrigger>
+              <SelectContent>
+                {[1, 2, 4, 8, 16].map((n) => (
+                  <SelectItem key={n} value={String(n)}>{n}</SelectItem>
+                ))}
+              </SelectContent>
+            </Select>
+          </div>
+          <div className="max-h-40 overflow-auto rounded border border-border bg-card/20 p-2 text-xs">
+            {sourcePaths.map((p) => <div key={p} className="truncate">{p}</div>)}
+          </div>
+          {error && (
+            <div role="alert" className="rounded border border-destructive/40 bg-destructive/5 p-2 text-xs text-destructive">
+              {error}
+            </div>
+          )}
+        </div>
+        <ExportDialogFooter onCancel={closeModal} onSubmit={handleSubmit} submitting={submitting} submitLabel="Export" />
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/ExportDialogFooter.tsx

@@ -0,0 +1,23 @@
+import { Button } from '@/components/ui/button';
+import { DialogFooter } from '@/components/ui/dialog';
+
+interface Props {
+  onCancel: () => void;
+  onSubmit: () => void;
+  submitting: boolean;
+  submitLabel: string;
+  submitDisabled?: boolean;
+}
+
+export function ExportDialogFooter({ onCancel, onSubmit, submitting, submitLabel, submitDisabled }: Props) {
+  return (
+    <DialogFooter>
+      <Button variant="ghost" onClick={onCancel} disabled={submitting}>
+        Cancel
+      </Button>
+      <Button onClick={onSubmit} disabled={submitting || submitDisabled}>
+        {submitting ? 'Exporting…' : submitLabel}
+      </Button>
+    </DialogFooter>
+  );
+}

src/renderer/components/modals/ExportDocxDialog.tsx

@@ -0,0 +1,78 @@
+import { useState } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Checkbox } from '@/components/ui/checkbox';
+import { Label } from '@/components/ui/label';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+import { useAppStore } from '@/stores/app-store';
+import { useSettingsStore } from '@/stores/settings-store';
+import { useExportSource } from '@/hooks/use-export-source';
+import { ipc } from '@/lib/ipc';
+import { toast } from '@/lib/toast';
+import { ExportDialogFooter } from './ExportDialogFooter';
+
+export function ExportDocxDialog({ sourcePath }: { sourcePath: string }) {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const { docxTemplate, renderTablesAsAscii } = useSettingsStore();
+  const source = useExportSource();
+  const [template, setTemplate] = useState<'standard' | 'minimal' | 'modern'>(docxTemplate);
+  const [ascii, setAscii] = useState(renderTablesAsAscii);
+  const [submitting, setSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleSubmit = async () => {
+    if (!source) { setError('No file open.'); return; }
+    setSubmitting(true);
+    setError(null);
+    const result = await ipc.export.docx({
+      inputPath: source.path,
+      outputPath: source.path.replace(/\.md$/, '.docx'),
+      template,
+      renderTablesAsAscii: ascii,
+    } as any);
+    if (!result.ok) {
+      toast.error(`Export failed: ${result.error.message}`);
+      setError(result.error.message);
+      setSubmitting(false);
+    } else {
+      toast.success(`Exported ${source.title} to ${result.data?.outputPath ?? 'file'}`);
+      closeModal();
+    }
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && closeModal()}>
+      <DialogContent aria-describedby="docx-desc">
+        <DialogHeader>
+          <DialogTitle>Export to DOCX</DialogTitle>
+          <DialogDescription id="docx-desc">{sourcePath}</DialogDescription>
+        </DialogHeader>
+        <div className="space-y-3 text-sm">
+          <div>
+            <Label htmlFor="docx-template">Template</Label>
+            <Select value={template} onValueChange={(v) => setTemplate(v as any)}>
+              <SelectTrigger id="docx-template" aria-label="Template"><SelectValue /></SelectTrigger>
+              <SelectContent>
+                <SelectItem value="standard">Standard</SelectItem>
+                <SelectItem value="minimal">Minimal</SelectItem>
+                <SelectItem value="modern">Modern</SelectItem>
+              </SelectContent>
+            </Select>
+            <p className="mt-1 text-xs text-muted-foreground">
+              Bundled with the app. Standard is the default; Modern adds a colored cover page.
+            </p>
+          </div>
+          <label className="flex items-center gap-2">
+            <Checkbox checked={ascii} onCheckedChange={(c) => setAscii(!!c)} aria-label="ASCII tables" />
+            Render tables as ASCII
+          </label>
+          {error && (
+            <div role="alert" className="rounded border border-destructive/40 bg-destructive/5 p-2 text-xs text-destructive">
+              {error}
+            </div>
+          )}
+        </div>
+        <ExportDialogFooter onCancel={closeModal} onSubmit={handleSubmit} submitting={submitting} submitLabel="Export" />
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/ExportHtmlDialog.tsx

@@ -0,0 +1,82 @@
+import { useState } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Checkbox } from '@/components/ui/checkbox';
+import { Label } from '@/components/ui/label';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+import { useAppStore } from '@/stores/app-store';
+import { useSettingsStore } from '@/stores/settings-store';
+import { useExportSource } from '@/hooks/use-export-source';
+import { ipc } from '@/lib/ipc';
+import { toast } from '@/lib/toast';
+import { ExportDialogFooter } from './ExportDialogFooter';
+
+export function ExportHtmlDialog({ sourcePath }: { sourcePath: string }) {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const { htmlHighlightStyle, renderTablesAsAscii } = useSettingsStore();
+  const source = useExportSource();
+  const [standalone, setStandalone] = useState(true);
+  const [highlight, setHighlight] = useState(htmlHighlightStyle);
+  const [ascii, setAscii] = useState(renderTablesAsAscii);
+  const [submitting, setSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleSubmit = async () => {
+    if (!source) { setError('No file open.'); return; }
+    setSubmitting(true);
+    setError(null);
+    const result = await ipc.export.html({
+      inputPath: source.path,
+      outputPath: source.path.replace(/\.md$/, '.html'),
+      standalone,
+      highlightStyle: highlight,
+      renderTablesAsAscii: ascii,
+    } as any);
+    if (!result.ok) {
+      toast.error(`Export failed: ${result.error.message}`);
+      setError(result.error.message);
+      setSubmitting(false);
+    } else {
+      toast.success(`Exported ${source.title} to ${result.data?.outputPath ?? 'file'}`);
+      closeModal();
+    }
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && closeModal()}>
+      <DialogContent aria-describedby="html-desc">
+        <DialogHeader>
+          <DialogTitle>Export to HTML</DialogTitle>
+          <DialogDescription id="html-desc">{sourcePath}</DialogDescription>
+        </DialogHeader>
+        <div className="space-y-3 text-sm">
+          <label className="flex items-center gap-2">
+            <Checkbox checked={standalone} onCheckedChange={(c) => setStandalone(!!c)} aria-label="Standalone" />
+            Standalone document (with inline CSS)
+          </label>
+          <div>
+            <Label htmlFor="html-highlight">Syntax highlight style</Label>
+            <Select value={highlight} onValueChange={(v) => setHighlight(v as any)}>
+              <SelectTrigger id="html-highlight" aria-label="Highlight style"><SelectValue /></SelectTrigger>
+              <SelectContent>
+                <SelectItem value="github">GitHub</SelectItem>
+                <SelectItem value="monokai">Monokai</SelectItem>
+                <SelectItem value="nord">Nord</SelectItem>
+                <SelectItem value="none">None</SelectItem>
+              </SelectContent>
+            </Select>
+          </div>
+          <label className="flex items-center gap-2">
+            <Checkbox checked={ascii} onCheckedChange={(c) => setAscii(!!c)} aria-label="ASCII tables" />
+            Render tables as ASCII
+          </label>
+          {error && (
+            <div role="alert" className="rounded border border-destructive/40 bg-destructive/5 p-2 text-xs text-destructive">
+              {error}
+            </div>
+          )}
+        </div>
+        <ExportDialogFooter onCancel={closeModal} onSubmit={handleSubmit} submitting={submitting} submitLabel="Export" />
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/ExportPdfDialog.tsx

@@ -0,0 +1,105 @@
+import { useState } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Checkbox } from '@/components/ui/checkbox';
+import { Label } from '@/components/ui/label';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+import { useAppStore } from '@/stores/app-store';
+import { useSettingsStore } from '@/stores/settings-store';
+import { useExportSource } from '@/hooks/use-export-source';
+import { ipc } from '@/lib/ipc';
+import { toast } from '@/lib/toast';
+import { ExportDialogFooter } from './ExportDialogFooter';
+
+const MARGIN_MAP = {
+  normal: { top: 25, right: 25, bottom: 25, left: 25 },
+  narrow: { top: 15, right: 15, bottom: 15, left: 15 },
+  wide: { top: 35, right: 35, bottom: 35, left: 35 },
+} as const;
+
+export function ExportPdfDialog({ sourcePath }: { sourcePath: string }) {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const { fontSize, pdfFormat, pdfMargins, pdfEmbedFonts, renderTablesAsAscii } = useSettingsStore();
+  const [format, setFormat] = useState<'letter' | 'a4' | 'legal'>(pdfFormat);
+  const [margins, setMargins] = useState<'normal' | 'narrow' | 'wide'>(pdfMargins);
+  const [embed, setEmbed] = useState(pdfEmbedFonts);
+  const [ascii, setAscii] = useState(renderTablesAsAscii);
+  const [submitting, setSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const source = useExportSource();
+
+  const handleSubmit = async () => {
+    if (!source) {
+      setError('No file open.');
+      return;
+    }
+    setSubmitting(true);
+    setError(null);
+    const result = await ipc.export.pdf({
+      inputPath: source.path,
+      outputPath: source.path.replace(/\.md$/, '.pdf'),
+      format,
+      margins: MARGIN_MAP[margins],
+      embedFonts: embed,
+      renderTablesAsAscii: ascii,
+      fontSize,
+    } as any);
+    if (!result.ok) {
+      toast.error(`Export failed: ${result.error?.message ?? 'Export failed'}`);
+      setError(result.error?.message ?? 'Export failed');
+      setSubmitting(false);
+    } else {
+      toast.success(`Exported ${source.title} to ${result.data?.outputPath ?? 'file'}`);
+      closeModal();
+    }
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && closeModal()}>
+      <DialogContent aria-describedby="pdf-desc">
+        <DialogHeader>
+          <DialogTitle>Export to PDF</DialogTitle>
+          <DialogDescription id="pdf-desc">{sourcePath}</DialogDescription>
+        </DialogHeader>
+        <div className="space-y-3 text-sm">
+          <div>
+            <Label htmlFor="pdf-format">Format</Label>
+            <Select value={format} onValueChange={(v) => setFormat(v as typeof format)}>
+              <SelectTrigger id="pdf-format" aria-label="Format"><SelectValue /></SelectTrigger>
+              <SelectContent>
+                <SelectItem value="letter">Letter</SelectItem>
+                <SelectItem value="a4">A4</SelectItem>
+                <SelectItem value="legal">Legal</SelectItem>
+              </SelectContent>
+            </Select>
+          </div>
+          <div>
+            <Label htmlFor="pdf-margins">Margins</Label>
+            <Select value={margins} onValueChange={(v) => setMargins(v as typeof margins)}>
+              <SelectTrigger id="pdf-margins" aria-label="Margins"><SelectValue /></SelectTrigger>
+              <SelectContent>
+                <SelectItem value="narrow">Narrow</SelectItem>
+                <SelectItem value="normal">Normal</SelectItem>
+                <SelectItem value="wide">Wide</SelectItem>
+              </SelectContent>
+            </Select>
+          </div>
+          <label className="flex items-center gap-2">
+            <Checkbox checked={embed} onCheckedChange={(c) => setEmbed(!!c)} aria-label="Embed fonts" />
+            Embed fonts
+          </label>
+          <label className="flex items-center gap-2">
+            <Checkbox checked={ascii} onCheckedChange={(c) => setAscii(!!c)} aria-label="ASCII tables" />
+            Render tables as ASCII
+          </label>
+          {error && (
+            <div role="alert" className="rounded border border-destructive/40 bg-destructive/5 p-2 text-xs text-destructive">
+              {error}
+            </div>
+          )}
+        </div>
+        <ExportDialogFooter onCancel={closeModal} onSubmit={handleSubmit} submitting={submitting} submitLabel="Export" />
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/ExportSettings.tsx

@@ -0,0 +1,66 @@
+import { useSettingsStore } from '@/stores/settings-store';
+import { Label } from '@/components/ui/label';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+import { Switch } from '@/components/ui/switch';
+
+export function ExportSettings() {
+  const { pdfFormat, pdfMargins, pdfEmbedFonts, docxTemplate, htmlHighlightStyle, renderTablesAsAscii, setSetting } = useSettingsStore();
+
+  return (
+    <div className="space-y-5 text-sm">
+      <div>
+        <Label htmlFor="export-pdf-format">Default PDF format</Label>
+        <Select value={pdfFormat} onValueChange={(v) => setSetting('pdfFormat', v as any)}>
+          <SelectTrigger id="export-pdf-format" aria-label="Default PDF format"><SelectValue /></SelectTrigger>
+          <SelectContent>
+            <SelectItem value="letter">Letter</SelectItem>
+            <SelectItem value="a4">A4</SelectItem>
+            <SelectItem value="legal">Legal</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+      <div>
+        <Label htmlFor="export-pdf-margins">Default PDF margins</Label>
+        <Select value={pdfMargins} onValueChange={(v) => setSetting('pdfMargins', v as any)}>
+          <SelectTrigger id="export-pdf-margins" aria-label="Default PDF margins"><SelectValue /></SelectTrigger>
+          <SelectContent>
+            <SelectItem value="narrow">Narrow</SelectItem>
+            <SelectItem value="normal">Normal</SelectItem>
+            <SelectItem value="wide">Wide</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+      <label className="flex items-center justify-between">
+        <span>Embed fonts in PDFs</span>
+        <Switch checked={pdfEmbedFonts} onCheckedChange={(c) => setSetting('pdfEmbedFonts', c)} aria-label="Embed fonts" />
+      </label>
+      <div>
+        <Label htmlFor="export-docx-template">Default DOCX template</Label>
+        <Select value={docxTemplate} onValueChange={(v) => setSetting('docxTemplate', v as any)}>
+          <SelectTrigger id="export-docx-template" aria-label="Default DOCX template"><SelectValue /></SelectTrigger>
+          <SelectContent>
+            <SelectItem value="standard">Standard</SelectItem>
+            <SelectItem value="minimal">Minimal</SelectItem>
+            <SelectItem value="modern">Modern</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+      <div>
+        <Label htmlFor="export-html-highlight">Default HTML highlight</Label>
+        <Select value={htmlHighlightStyle} onValueChange={(v) => setSetting('htmlHighlightStyle', v as any)}>
+          <SelectTrigger id="export-html-highlight" aria-label="Default HTML highlight"><SelectValue /></SelectTrigger>
+          <SelectContent>
+            <SelectItem value="github">GitHub</SelectItem>
+            <SelectItem value="monokai">Monokai</SelectItem>
+            <SelectItem value="nord">Nord</SelectItem>
+            <SelectItem value="none">None</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+      <label className="flex items-center justify-between">
+        <span>Render tables as ASCII by default</span>
+        <Switch checked={renderTablesAsAscii} onCheckedChange={(c) => setSetting('renderTablesAsAscii', c)} aria-label="ASCII tables by default" />
+      </label>
+    </div>
+  );
+}

src/renderer/components/modals/FindInFilesDialog.tsx

@@ -0,0 +1,111 @@
+import { useState } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Button } from '@/components/ui/button';
+import { Checkbox } from '@/components/ui/checkbox';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { useAppStore } from '@/stores/app-store';
+import { useFileStore } from '@/stores/file-store';
+import { ipc } from '@/lib/ipc';
+
+interface SearchResult {
+  filePath: string;
+  line: number;
+  content: string;
+}
+
+export function FindInFilesDialog() {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const rootPath = useFileStore((s) => s.rootPath);
+  const openFile = useFileStore((s) => s.openFile);
+
+  const [query, setQuery] = useState('');
+  const [isRegex, setIsRegex] = useState(false);
+  const [caseSensitive, setCaseSensitive] = useState(false);
+  const [results, setResults] = useState<SearchResult[]>([]);
+  const [submitting, setSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleSearch = async () => {
+    if (!query || !rootPath) return;
+    setSubmitting(true);
+    setError(null);
+    const result = await ipc.file.search({ rootPath, query, isRegex, caseSensitive });
+    if (!result.ok) {
+      setError(result.error.message);
+      setSubmitting(false);
+      return;
+    }
+    setResults(result.data ?? []);
+    setSubmitting(false);
+  };
+
+  const handleResultClick = (filePath: string) => {
+    openFile(filePath);
+    closeModal();
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && closeModal()}>
+      <DialogContent aria-describedby="find-desc" className="max-w-2xl">
+        <DialogHeader>
+          <DialogTitle>Find in files</DialogTitle>
+          <DialogDescription id="find-desc">
+            {rootPath ? `Search in ${rootPath}` : 'No folder open'}
+          </DialogDescription>
+        </DialogHeader>
+        <div className="space-y-3">
+          <div>
+            <Label htmlFor="find-query">Query</Label>
+            <Input
+              id="find-query"
+              aria-label="Query"
+              value={query}
+              onChange={(e) => setQuery(e.target.value)}
+              onKeyDown={(e) => e.key === 'Enter' && handleSearch()}
+            />
+          </div>
+          <div className="flex gap-4">
+            <label className="flex items-center gap-2">
+              <Checkbox checked={isRegex} onCheckedChange={(c) => setIsRegex(!!c)} aria-label="Regex" />
+              Regex
+            </label>
+            <label className="flex items-center gap-2">
+              <Checkbox checked={caseSensitive} onCheckedChange={(c) => setCaseSensitive(!!c)} aria-label="Case sensitive" />
+              Case sensitive
+            </label>
+          </div>
+          {error && (
+            <div role="alert" className="rounded border border-destructive/40 bg-destructive/5 p-2 text-xs text-destructive">
+              {error}
+            </div>
+          )}
+          {results.length > 0 && (
+            <div>
+              <Label>{results.length} result{results.length === 1 ? '' : 's'}</Label>
+              <div className="max-h-64 overflow-auto rounded border border-border bg-card/20 text-xs">
+                {results.map((r, i) => (
+                  <button
+                    key={`${r.filePath}:${r.line}:${i}`}
+                    onClick={() => handleResultClick(r.filePath)}
+                    className="block w-full truncate border-b border-border/30 px-2 py-1 text-left hover:bg-card/50"
+                    data-testid="find-result"
+                  >
+                    <span className="font-mono text-muted-foreground">{r.filePath}:{r.line}</span>
+                    <span className="ml-2">{r.content}</span>
+                  </button>
+                ))}
+              </div>
+            </div>
+          )}
+        </div>
+        <DialogFooter>
+          <Button variant="ghost" onClick={closeModal} disabled={submitting}>Close</Button>
+          <Button onClick={handleSearch} disabled={submitting || !query}>
+            {submitting ? 'Searching…' : 'Search'}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/ModalLayer.tsx

@@ -0,0 +1,45 @@
+import { useAppStore } from '@/stores/app-store';
+import { AboutDialog } from './AboutDialog';
+import { AsciiGeneratorDialog } from './AsciiGeneratorDialog';
+import { ConfirmDialog } from './ConfirmDialog';
+import { ExportBatchDialog } from './ExportBatchDialog';
+import { ExportDocxDialog } from './ExportDocxDialog';
+import { ExportHtmlDialog } from './ExportHtmlDialog';
+import { ExportPdfDialog } from './ExportPdfDialog';
+import { FindInFilesDialog } from './FindInFilesDialog';
+import { SettingsSheet } from './SettingsSheet';
+import { TableGeneratorDialog } from './TableGeneratorDialog';
+import { WelcomeDialog } from './WelcomeDialog';
+import { WordExportDialog } from './WordExportDialog';
+
+export function ModalLayer() {
+  const modal = useAppStore((s) => s.modal);
+  switch (modal.kind) {
+    case null:
+      return null;
+    case 'export-pdf':
+      return <ExportPdfDialog sourcePath={modal.props.sourcePath} />;
+    case 'export-docx':
+      return <ExportDocxDialog sourcePath={modal.props.sourcePath} />;
+    case 'export-html':
+      return <ExportHtmlDialog sourcePath={modal.props.sourcePath} />;
+    case 'export-batch':
+      return <ExportBatchDialog sourcePaths={modal.props.sourcePaths} />;
+    case 'settings':
+      return <SettingsSheet />;
+    case 'about':
+      return <AboutDialog />;
+    case 'welcome':
+      return <WelcomeDialog />;
+    case 'confirm':
+      return <ConfirmDialog {...modal.props} />;
+    case 'export-word':
+      return <WordExportDialog sourcePath={modal.props.sourcePath} />;
+    case 'ascii-generator':
+      return <AsciiGeneratorDialog />;
+    case 'table-generator':
+      return <TableGeneratorDialog />;
+    case 'find-in-files':
+      return <FindInFilesDialog />;
+  }
+}

src/renderer/components/modals/PluginsSettings.tsx

@@ -0,0 +1,14 @@
+import { Sparkles } from 'lucide-react';
+
+export function PluginsSettings() {
+  return (
+    <div className="flex flex-col items-center justify-center gap-3 py-12 text-center text-muted-foreground">
+      <Sparkles className="h-8 w-8 opacity-50" />
+      <h3 className="text-base font-semibold text-foreground">Coming soon</h3>
+      <p className="max-w-sm text-sm">
+        The plugin system is on the roadmap. You'll be able to extend MarkdownConverter with custom
+        commands, themes, and export formats.
+      </p>
+    </div>
+  );
+}

src/renderer/components/modals/SettingsSheet.tsx

@@ -0,0 +1,45 @@
+import { Sheet, SheetContent, SheetDescription, SheetHeader, SheetTitle } from '@/components/ui/sheet';
+import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
+import { Button } from '@/components/ui/button';
+import { useAppStore } from '@/stores/app-store';
+import { useSettingsStore } from '@/stores/settings-store';
+import { EditorSettings } from './EditorSettings';
+import { ThemeSettings } from './ThemeSettings';
+import { ExportSettings } from './ExportSettings';
+import { PluginsSettings } from './PluginsSettings';
+import { AboutSettings } from './AboutSettings';
+
+export function SettingsSheet() {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const resetToDefaults = useSettingsStore((s) => s.resetToDefaults);
+
+  return (
+    <Sheet open onOpenChange={(o) => !o && closeModal()}>
+      <SheetContent aria-describedby="settings-desc" side="right" className="w-full sm:max-w-[480px]">
+        <SheetHeader>
+          <SheetTitle>Settings</SheetTitle>
+          <SheetDescription id="settings-desc">Editor, theme, and export preferences</SheetDescription>
+        </SheetHeader>
+        <Tabs defaultValue="editor" className="mt-4">
+          <TabsList className="grid w-full grid-cols-5">
+            <TabsTrigger value="editor">Editor</TabsTrigger>
+            <TabsTrigger value="theme">Theme</TabsTrigger>
+            <TabsTrigger value="export">Export</TabsTrigger>
+            <TabsTrigger value="plugins">Plugins</TabsTrigger>
+            <TabsTrigger value="about">About</TabsTrigger>
+          </TabsList>
+          <div className="mt-4 max-h-[70vh] overflow-y-auto pr-2">
+            <TabsContent value="editor"><EditorSettings /></TabsContent>
+            <TabsContent value="theme"><ThemeSettings /></TabsContent>
+            <TabsContent value="export"><ExportSettings /></TabsContent>
+            <TabsContent value="plugins"><PluginsSettings /></TabsContent>
+            <TabsContent value="about"><AboutSettings /></TabsContent>
+          </div>
+        </Tabs>
+        <div className="mt-4 flex justify-end border-t border-border pt-4">
+          <Button variant="ghost" onClick={resetToDefaults}>Reset to defaults</Button>
+        </div>
+      </SheetContent>
+    </Sheet>
+  );
+}

src/renderer/components/modals/TableGeneratorDialog.tsx

@@ -0,0 +1,132 @@
+import { useState } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Button } from '@/components/ui/button';
+import { Checkbox } from '@/components/ui/checkbox';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { useAppStore } from '@/stores/app-store';
+import { toast } from '@/lib/toast';
+
+function pad(s: string, w: number) {
+  return s.padEnd(w);
+}
+
+function generateTable(rows: number, cols: number, hasHeader: boolean, headers: string[], data: string[][]): string {
+  const width = cols;
+  const colWidths: number[] = Array.from({ length: width }, (_, c) => {
+    const all = [headers[c] ?? '', ...data.map((r) => r[c] ?? '')];
+    return Math.max(...all.map((s) => s.length), 3);
+  });
+  const lines: string[] = [];
+  if (hasHeader) {
+    lines.push('| ' + Array.from({ length: width }, (_, c) => pad(headers[c] ?? `Col ${c + 1}`, colWidths[c])).join(' | ') + ' |');
+    lines.push('| ' + colWidths.map((w) => '-'.repeat(w)).join(' | ') + ' |');
+  }
+  for (const row of data) {
+    lines.push('| ' + Array.from({ length: width }, (_, c) => pad(row[c] ?? '', colWidths[c])).join(' | ') + ' |');
+  }
+  // Add empty rows if data has fewer
+  for (let i = data.length; i < rows; i++) {
+    lines.push('| ' + colWidths.map((w) => pad('', w)).join(' | ') + ' |');
+  }
+  return lines.join('\n');
+}
+
+export function TableGeneratorDialog() {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const [rows, setRows] = useState(3);
+  const [cols, setCols] = useState(3);
+  const [hasHeader, setHasHeader] = useState(true);
+  const [headers, setHeaders] = useState<string[]>(['Col 1', 'Col 2', 'Col 3']);
+
+  const output = generateTable(rows, cols, hasHeader, headers, []);
+
+  const handleCopy = async () => {
+    try {
+      await navigator.clipboard.writeText(output);
+      toast.success('Copied to clipboard');
+    } catch {
+      toast.error('Failed to copy');
+    }
+  };
+
+  const updateHeadersCount = (newCols: number) => {
+    setCols(newCols);
+    setHeaders((prev) => {
+      if (prev.length < newCols) return [...prev, ...Array(newCols - prev.length).fill('').map((_, i) => `Col ${prev.length + i + 1}`)];
+      return prev.slice(0, newCols);
+    });
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && closeModal()}>
+      <DialogContent aria-describedby="table-desc" className="max-w-2xl">
+        <DialogHeader>
+          <DialogTitle>Table generator</DialogTitle>
+          <DialogDescription id="table-desc">Specify rows × columns to generate a markdown table</DialogDescription>
+        </DialogHeader>
+        <div className="space-y-3">
+          <div className="flex gap-3">
+            <div className="flex-1">
+              <Label htmlFor="table-rows">Rows</Label>
+              <Input
+                id="table-rows"
+                aria-label="Rows"
+                type="number"
+                min={1}
+                max={50}
+                value={rows}
+                onChange={(e) => setRows(Math.max(1, Math.min(50, Number(e.target.value) || 1)))}
+              />
+            </div>
+            <div className="flex-1">
+              <Label htmlFor="table-cols">Columns</Label>
+              <Input
+                id="table-cols"
+                aria-label="Cols"
+                type="number"
+                min={1}
+                max={20}
+                value={cols}
+                onChange={(e) => updateHeadersCount(Math.max(1, Math.min(20, Number(e.target.value) || 1)))}
+              />
+            </div>
+          </div>
+          <label className="flex items-center gap-2">
+            <Checkbox checked={hasHeader} onCheckedChange={(c) => setHasHeader(!!c)} aria-label="Header" />
+            Include header row
+          </label>
+          {hasHeader && (
+            <div>
+              <Label>Header names</Label>
+              <div className="grid gap-2" style={{ gridTemplateColumns: `repeat(${cols}, minmax(0, 1fr))` }}>
+                {Array.from({ length: cols }, (_, i) => (
+                  <Input
+                    key={i}
+                    aria-label={`Header ${i + 1}`}
+                    value={headers[i] ?? ''}
+                    onChange={(e) => {
+                      const next = [...headers];
+                      next[i] = e.target.value;
+                      setHeaders(next);
+                    }}
+                  />
+                ))}
+              </div>
+            </div>
+          )}
+          <div>
+            <Label>Output</Label>
+            <pre className="overflow-auto rounded border border-border bg-card/30 p-3 text-xs" data-testid="table-output">
+              {output}
+            </pre>
+          </div>
+        </div>
+        <DialogFooter>
+          <Button variant="ghost" onClick={closeModal}>Close</Button>
+          <Button onClick={handleCopy}>Copy</Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/ThemeSettings.tsx

@@ -0,0 +1,45 @@
+import { useSettingsStore } from '@/stores/settings-store';
+import { Label } from '@/components/ui/label';
+import { RadioGroup, RadioGroupItem } from '@/components/ui/radio-group';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+
+export function ThemeSettings() {
+  const { theme, accentColor, fontFamily, setSetting } = useSettingsStore();
+
+  return (
+    <div className="space-y-5 text-sm">
+      <div>
+        <Label>Mode</Label>
+        <RadioGroup value={theme} onValueChange={(v) => setSetting('theme', v as 'light' | 'dark' | 'auto')}>
+          <div className="flex items-center gap-2"><RadioGroupItem value="light" id="theme-light" /><Label htmlFor="theme-light">Light</Label></div>
+          <div className="flex items-center gap-2"><RadioGroupItem value="dark" id="theme-dark" /><Label htmlFor="theme-dark">Dark</Label></div>
+          <div className="flex items-center gap-2"><RadioGroupItem value="auto" id="theme-auto" /><Label htmlFor="theme-auto">Auto (system)</Label></div>
+        </RadioGroup>
+      </div>
+      <div>
+        <Label htmlFor="theme-accent">Accent color</Label>
+        <Select value={accentColor} onValueChange={(v) => setSetting('accentColor', v as any)}>
+          <SelectTrigger id="theme-accent" aria-label="Accent color"><SelectValue /></SelectTrigger>
+          <SelectContent>
+            <SelectItem value="brand">Brand (orange)</SelectItem>
+            <SelectItem value="blue">Blue</SelectItem>
+            <SelectItem value="green">Green</SelectItem>
+            <SelectItem value="purple">Purple</SelectItem>
+            <SelectItem value="orange">Orange</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+      <div>
+        <Label htmlFor="theme-font-family">Editor font</Label>
+        <Select value={fontFamily} onValueChange={(v) => setSetting('fontFamily', v as any)}>
+          <SelectTrigger id="theme-font-family" aria-label="Editor font"><SelectValue /></SelectTrigger>
+          <SelectContent>
+            <SelectItem value="system">System (Plus Jakarta Sans)</SelectItem>
+            <SelectItem value="jetbrains">JetBrains Mono</SelectItem>
+            <SelectItem value="fira">Fira Code</SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+    </div>
+  );
+}

src/renderer/components/modals/WelcomeDialog.tsx

@@ -0,0 +1,51 @@
+import { useState } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Button } from '@/components/ui/button';
+import { Checkbox } from '@/components/ui/checkbox';
+import { useAppStore } from '@/stores/app-store';
+import { useSettingsStore } from '@/stores/settings-store';
+
+export function WelcomeDialog() {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const setSetting = useSettingsStore((s) => s.setSetting);
+  const [dontShow, setDontShow] = useState(false);
+
+  const handleClose = () => {
+    if (dontShow) setSetting('welcomeDismissed', true);
+    closeModal();
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && handleClose()}>
+      <DialogContent aria-describedby="welcome-desc" className="max-w-xl">
+        <DialogHeader>
+          <DialogTitle>Welcome to MarkdownConverter</DialogTitle>
+          <DialogDescription id="welcome-desc">
+            A polished editor for Markdown, with PDF, DOCX, and HTML export.
+          </DialogDescription>
+        </DialogHeader>
+        <div className="space-y-3 text-sm">
+          <div className="rounded-md border border-border bg-card/30 p-3">
+            <h3 className="font-semibold">1. Open a folder</h3>
+            <p className="text-muted-foreground">File → Open Folder, or ⌘O. Your tree appears on the left.</p>
+          </div>
+          <div className="rounded-md border border-border bg-card/30 p-3">
+            <h3 className="font-semibold">2. Edit & preview</h3>
+            <p className="text-muted-foreground">Type on the left, see the rendered preview on the right. Toggle with ⌘\.</p>
+          </div>
+          <div className="rounded-md border border-border bg-card/30 p-3">
+            <h3 className="font-semibold">3. Export anywhere</h3>
+            <p className="text-muted-foreground">File → Export to PDF / DOCX / HTML, or batch convert a folder.</p>
+          </div>
+        </div>
+        <DialogFooter className="flex-row items-center justify-between sm:justify-between">
+          <label className="flex items-center gap-2 text-xs text-muted-foreground">
+            <Checkbox checked={dontShow} onCheckedChange={(c) => setDontShow(!!c)} aria-label="Don't show again" />
+            Don't show again
+          </label>
+          <Button onClick={handleClose}>Get started</Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/modals/WordExportDialog.tsx

@@ -0,0 +1,114 @@
+import { useState, useEffect } from 'react';
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Button } from '@/components/ui/button';
+import { Label } from '@/components/ui/label';
+import { RadioGroup, RadioGroupItem } from '@/components/ui/radio-group';
+import { useAppStore } from '@/stores/app-store';
+import { useSettingsStore } from '@/stores/settings-store';
+import { useExportSource } from '@/hooks/use-export-source';
+import { generateDocx } from '@/lib/docx-export';
+import { ipc } from '@/lib/ipc';
+import { toast } from '@/lib/toast';
+
+export function WordExportDialog({ sourcePath }: { sourcePath: string }) {
+  const closeModal = useAppStore((s) => s.closeModal);
+  const setSetting = useSettingsStore((s) => s.setSetting);
+  const docxCustomTemplatePath = useSettingsStore((s) => s.docxCustomTemplatePath);
+  const source = useExportSource();
+
+  const [templateMode, setTemplateMode] = useState<'standard' | 'custom'>(docxCustomTemplatePath ? 'custom' : 'standard');
+  const [submitting, setSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    setTemplateMode(docxCustomTemplatePath ? 'custom' : 'standard');
+  }, [docxCustomTemplatePath]);
+
+  const handleChooseTemplate = async () => {
+    const result = await ipc.app.showSaveDialog?.({ title: 'Choose template path' });
+    if (result?.ok && result.data) {
+      setSetting('docxCustomTemplatePath', result.data);
+    }
+  };
+
+  const handleSubmit = async () => {
+    if (!source) { setError('No file open.'); return; }
+    setSubmitting(true);
+    setError(null);
+    try {
+      const blob = await generateDocx({
+        source: source.source,
+        title: source.title,
+        customTemplatePath: templateMode === 'custom' ? docxCustomTemplatePath : null,
+      });
+      const saveResult = await ipc.app.showSaveDialog?.({ title: 'Save as Word document', defaultPath: source.path.replace(/\.md$/, '.docx') });
+      if (!saveResult?.ok || !saveResult.data) {
+        setSubmitting(false);
+        return;
+      }
+      const buffer = new Uint8Array(await blob.arrayBuffer());
+      const writeResult = await ipc.file.writeBuffer({ path: saveResult.data, buffer });
+      if (!writeResult.ok) {
+        setError(writeResult.error.message);
+        setSubmitting(false);
+        return;
+      }
+      toast.success(`Exported ${source.title} to ${saveResult.data}`);
+      closeModal();
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err);
+      toast.error(`Export failed: ${msg}`);
+      setError(msg);
+      setSubmitting(false);
+    }
+  };
+
+  return (
+    <Dialog open onOpenChange={(o) => !o && closeModal()}>
+      <DialogContent aria-describedby="word-desc">
+        <DialogHeader>
+          <DialogTitle>Export to Word (.docx)</DialogTitle>
+          <DialogDescription id="word-desc">{sourcePath}</DialogDescription>
+        </DialogHeader>
+        <div className="space-y-3 text-sm">
+          <div>
+            <Label>Template</Label>
+            <RadioGroup value={templateMode} onValueChange={(v) => setTemplateMode(v as 'standard' | 'custom')}>
+              <div className="flex items-center gap-2">
+                <RadioGroupItem value="standard" id="template-standard" />
+                <Label htmlFor="template-standard">Standard (bundled)</Label>
+              </div>
+              <div className="flex items-center gap-2">
+                <RadioGroupItem value="custom" id="template-custom" />
+                <Label htmlFor="template-custom">Custom .dotx</Label>
+              </div>
+            </RadioGroup>
+          </div>
+          {templateMode === 'custom' && (
+            <div className="rounded border border-border bg-card/20 p-2 text-xs">
+              {docxCustomTemplatePath ? (
+                <span>Template path: <code>{docxCustomTemplatePath}</code></span>
+              ) : (
+                <span className="text-muted-foreground">No template selected. Click "Choose template..." to pick a .dotx file.</span>
+              )}
+              <Button variant="ghost" size="sm" onClick={handleChooseTemplate} className="ml-2">
+                Choose template...
+              </Button>
+            </div>
+          )}
+          {error && (
+            <div role="alert" className="rounded border border-destructive/40 bg-destructive/5 p-2 text-xs text-destructive">
+              {error}
+            </div>
+          )}
+        </div>
+        <DialogFooter>
+          <Button variant="ghost" onClick={closeModal} disabled={submitting}>Cancel</Button>
+          <Button onClick={handleSubmit} disabled={submitting}>
+            {submitting ? 'Exporting…' : 'Export'}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/renderer/components/preview/MarkdownRenderer.tsx

@@ -0,0 +1,44 @@
+import { useEffect, useRef, useState } from 'react';
+import { renderMarkdown } from '@/lib/markdown';
+import { MermaidLazy } from './MermaidLazy';
+
+interface Props {
+  source: string;
+}
+
+const MERMAID_RE = /```mermaid\n([\s\S]*?)```/g;
+
+function extractMermaidCodes(source: string): string[] {
+  const codes: string[] = [];
+  let match: RegExpExecArray | null;
+  while ((match = MERMAID_RE.exec(source)) !== null) {
+    codes.push(match[1].trim());
+  }
+  return codes;
+}
+
+export function MarkdownRenderer({ source }: Props) {
+  const html = renderMarkdown(source);
+  const containerRef = useRef<HTMLDivElement>(null);
+  const [mermaidCodes, setMermaidCodes] = useState<string[]>([]);
+
+  // Re-derive mermaid codes from the original source. The renderMarkdown function
+  // replaces mermaid blocks with placeholders (data-mermaid-source="${idx}"), but
+  // it does not return the actual codes. Rather than thread them through the API,
+  // we re-extract from the source. Source is small (single buffer content) so this
+  // cost is negligible.
+  useEffect(() => {
+    setMermaidCodes(extractMermaidCodes(source));
+  }, [source]);
+
+  return (
+    <div className="prose prose-neutral dark:prose-invert max-w-none p-6" ref={containerRef}>
+      <div dangerouslySetInnerHTML={{ __html: html }} />
+      {mermaidCodes.map((code, i) => (
+        <div key={i} className="my-4">
+          <MermaidLazy code={code} />
+        </div>
+      ))}
+    </div>
+  );
+}

src/renderer/components/preview/MermaidLazy.tsx

@@ -0,0 +1,45 @@
+import { useEffect, useRef, useState } from 'react';
+
+interface Props {
+  code: string;
+}
+
+let mermaidModule: typeof import('mermaid').default | null = null;
+let initialized = false;
+
+async function getMermaid() {
+  if (!mermaidModule) {
+    const mod = await import('mermaid');
+    mermaidModule = mod.default;
+  }
+  if (!initialized) {
+    mermaidModule.initialize({ startOnLoad: false, theme: 'default' });
+    initialized = true;
+  }
+  return mermaidModule;
+}
+
+export function MermaidLazy({ code }: Props) {
+  const [svg, setSvg] = useState<string | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const idRef = useRef(`mermaid-${Math.random().toString(36).slice(2)}`);
+
+  useEffect(() => {
+    let cancelled = false;
+    getMermaid()
+      .then((m) => m.render(idRef.current, code))
+      .then((rendered) => {
+        if (!cancelled) setSvg(rendered);
+      })
+      .catch((err: Error) => {
+        if (!cancelled) setError(err.message);
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, [code]);
+
+  if (error) return <div className="rounded border border-destructive/40 bg-destructive/5 p-2 text-xs text-destructive">{error}</div>;
+  if (!svg) return <div className="text-xs text-muted-foreground">Loading diagram…</div>;
+  return <div data-testid="mermaid-output" dangerouslySetInnerHTML={{ __html: svg }} />;
+}

src/renderer/components/preview/PreviewPane.tsx

@@ -0,0 +1,22 @@
+import { MarkdownRenderer } from './MarkdownRenderer';
+import { usePreviewStore } from '@/stores/preview-store';
+import { useScrollSync } from '@/hooks/use-scroll-sync';
+
+export function PreviewPane() {
+  const { source, setScrollRatio } = usePreviewStore();
+  const { handlePreviewScroll } = useScrollSync({ onPreviewScroll: setScrollRatio });
+
+  if (!source) {
+    return (
+      <div className="flex h-full items-center justify-center text-muted-foreground">
+        <p>Nothing to preview. Start typing in the editor.</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="h-full overflow-auto bg-card/10" onScroll={handlePreviewScroll}>
+      <MarkdownRenderer source={source} />
+    </div>
+  );
+}

src/renderer/components/sidebar/FileTree.tsx

@@ -0,0 +1,73 @@
+import { ChevronRight, Folder, FolderOpen, File, FileText } from 'lucide-react';
+import { useFileStore } from '@/stores/file-store';
+import { cn } from '@/lib/utils';
+
+function FileTreeNode({ node, depth }: { node: import('@/stores/file-store').FileNode; depth: number }) {
+  const { expanded, activeTabId, loadChildren, toggleExpanded, openFile } = useFileStore();
+  const isExpanded = expanded.has(node.path);
+  const isActive = activeTabId === node.path;
+
+  if (node.isDirectory) {
+    const handleClick = async () => {
+      if (!node.loaded) {
+        await loadChildren(node.path);
+      }
+      toggleExpanded(node.path);
+    };
+
+    return (
+      <div>
+        <button
+          onClick={handleClick}
+          className={cn(
+            'flex w-full items-center gap-1 rounded px-1 py-0.5 text-left text-xs hover:bg-accent',
+            isActive && 'bg-accent'
+          )}
+          style={{ paddingLeft: `${depth * 16 + 4}px` }}
+        >
+          <ChevronRight
+            size={12}
+            className={cn('transition-transform duration-150', isExpanded && 'rotate-90')}
+          />
+          {isExpanded ? <FolderOpen size={14} /> : <Folder size={14} />}
+          <span className="truncate">{node.name}</span>
+        </button>
+        {isExpanded && node.loaded && node.children && (
+          <div>
+            {node.children.map((child) => (
+              <FileTreeNode key={child.path} node={child} depth={depth + 1} />
+            ))}
+          </div>
+        )}
+      </div>
+    );
+  }
+
+  return (
+    <button
+      onClick={() => openFile(node.path)}
+      className={cn(
+        'flex w-full items-center gap-1 rounded px-1 py-0.5 text-left text-xs hover:bg-accent',
+        isActive && 'bg-accent text-accent-foreground'
+      )}
+      style={{ paddingLeft: `${depth * 16 + 4}px` }}
+    >
+      <FileText size={14} />
+      <span className="truncate">{node.name}</span>
+    </button>
+  );
+}
+
+export function FileTree() {
+  const tree = useFileStore((s) => s.tree);
+
+  if (!tree) return null;
+
+  return (
+    <div className="py-1">
+      {tree.children?.map((child) => (
+        <FileTreeNode key={child.path} node={child} depth={0} />
+      ))}
+    </div>
+  );
+}

src/renderer/components/sidebar/GitStatusPanel.tsx

@@ -0,0 +1,101 @@
+import { useEffect, useState } from 'react';
+import { RefreshCw, FileX, FilePlus, FileEdit, FileQuestion } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { useFileStore } from '@/stores/file-store';
+import { ipc } from '@/lib/ipc';
+
+interface GitStatus {
+  filePath: string;
+  status: 'modified' | 'added' | 'deleted' | 'untracked';
+}
+
+const STATUS_ICON: Record<GitStatus['status'], JSX.Element> = {
+  modified: <FileEdit className="h-3 w-3 text-warning" />,
+  added: <FilePlus className="h-3 w-3 text-success" />,
+  deleted: <FileX className="h-3 w-3 text-destructive" />,
+  untracked: <FileQuestion className="h-3 w-3 text-muted-foreground" />,
+};
+
+const STATUS_LABEL: Record<GitStatus['status'], string> = {
+  modified: 'M',
+  added: 'A',
+  deleted: 'D',
+  untracked: '?',
+};
+
+export function GitStatusPanel() {
+  const rootPath = useFileStore((s) => s.rootPath);
+  const openFile = useFileStore((s) => s.openFile);
+  const [status, setStatus] = useState<GitStatus[]>([]);
+  const [error, setError] = useState<string | null>(null);
+  const [loading, setLoading] = useState(false);
+
+  const load = async () => {
+    if (!rootPath) {
+      setStatus([]);
+      return;
+    }
+    setLoading(true);
+    setError(null);
+    const result = await ipc.file.gitStatus({ rootPath });
+    if (!result.ok) {
+      setError(result.error.message);
+      setStatus([]);
+      setLoading(false);
+      return;
+    }
+    setStatus(result.data ?? []);
+    setLoading(false);
+  };
+
+  useEffect(() => {
+    load();
+    // Listen for git.refresh command via custom event
+    const handler = () => load();
+    window.addEventListener('mc:git-refresh', handler);
+    return () => window.removeEventListener('mc:git-refresh', handler);
+  }, [rootPath]);
+
+  if (!rootPath) {
+    return <div className="p-3 text-xs text-muted-foreground">No folder open</div>;
+  }
+
+  if (error) {
+    return (
+      <div className="p-3 text-xs">
+        <div className="text-destructive">Error: {error}</div>
+        <p className="mt-1 text-muted-foreground">Not a git repository, or git not installed.</p>
+        <Button size="sm" variant="ghost" onClick={load} className="mt-2">Retry</Button>
+      </div>
+    );
+  }
+
+  if (status.length === 0 && !loading) {
+    return <div className="p-3 text-xs text-muted-foreground">Working tree clean</div>;
+  }
+
+  return (
+    <div className="p-2 text-xs">
+      <div className="flex items-center justify-between px-1 py-1">
+        <span className="font-semibold">{status.length} changed file{status.length === 1 ? '' : 's'}</span>
+        <Button size="sm" variant="ghost" onClick={load} aria-label="Refresh">
+          <RefreshCw className="h-3 w-3" />
+        </Button>
+      </div>
+      <div className="space-y-0.5">
+        {status.map((s) => (
+          <button
+            key={s.filePath}
+            onClick={() => openFile(s.filePath)}
+            className="flex w-full items-center gap-2 rounded px-2 py-1 text-left hover:bg-card/50"
+            data-testid="git-status-row"
+          >
+            {STATUS_ICON[s.status]}
+            <span className="w-3 font-mono text-xs">{STATUS_LABEL[s.status]}</span>
+            <span className="truncate font-mono">{s.filePath.replace(rootPath + '/', '')}</span>
+          </button>
+        ))}
+      </div>
+    </div>
+  );
+}

src/renderer/components/sidebar/Outline.tsx

@@ -0,0 +1,77 @@
+import { useEditorStore } from '@/stores/editor-store';
+
+const HEADING_RE = /^(#{1,6})\s+(.+)$/gm;
+
+interface HeadingItem {
+  level: number;
+  text: string;
+  line: number;
+}
+
+function extractHeadings(content: string): HeadingItem[] {
+  const headings: HeadingItem[] = [];
+  let match: RegExpExecArray | null;
+  const re = new RegExp(HEADING_RE.source, 'gm');
+  let lineNum = 1;
+  for (const line of content.split('\n')) {
+    re.lastIndex = 0;
+    match = re.exec(line);
+    if (match) {
+      headings.push({
+        level: match[1].length,
+        text: match[2].trim(),
+        line: lineNum,
+      });
+    }
+    lineNum++;
+  }
+  return headings;
+}
+
+export function Outline() {
+  const activeId = useEditorStore((s) => s.activeId);
+  const buffers = useEditorStore((s) => s.buffers);
+
+  if (!activeId) {
+    return (
+      <div className="flex flex-col items-center justify-center gap-2 py-8 text-xs text-muted-foreground">
+        <span>No file open</span>
+      </div>
+    );
+  }
+
+  const buffer = buffers.get(activeId);
+  if (!buffer) {
+    return (
+      <div className="flex flex-col items-center justify-center gap-2 py-8 text-xs text-muted-foreground">
+        <span>No file open</span>
+      </div>
+    );
+  }
+
+  const headings = extractHeadings(buffer.content);
+
+  if (headings.length === 0) {
+    return (
+      <div className="flex flex-col items-center justify-center gap-2 py-8 text-xs text-muted-foreground">
+        <span>No headings</span>
+      </div>
+    );
+  }
+
+  return (
+    <div className="flex flex-col gap-0.5 py-1">
+      {headings.map((h, i) => (
+        <button
+          key={i}
+          onClick={() => {}}
+          className="flex items-center gap-1 rounded px-2 py-0.5 text-left text-xs hover:bg-accent"
+          style={{ paddingLeft: `${(h.level - 1) * 16 + 8}px` }}
+        >
+          <span className="truncate text-muted-foreground">#{h.level}</span>
+          <span className="truncate">{h.text}</span>
+        </button>
+      ))}
+    </div>
+  );
+}

src/renderer/components/sidebar/Sidebar.tsx

@@ -0,0 +1,70 @@
+import { ChevronRight, FolderOpen } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { Collapsible, CollapsibleTrigger, CollapsibleContent } from '@/components/ui/collapsible';
+import { ScrollArea } from '@/components/ui/scroll-area';
+import { useFileStore } from '@/stores/file-store';
+import { FileTree } from './FileTree';
+import { Outline } from './Outline';
+import { GitStatusPanel } from './GitStatusPanel';
+
+export function Sidebar() {
+  const tree = useFileStore((s) => s.tree);
+
+  return (
+    <div className="flex h-full flex-col gap-3">
+      {/* Files section */}
+      <Collapsible defaultOpen>
+        <CollapsibleTrigger asChild>
+          <button className="flex w-full items-center gap-1.5 px-1 py-1.5 text-xs font-medium hover:bg-accent rounded">
+            <ChevronRight size={12} className="rotate-90" />
+            Files
+          </button>
+        </CollapsibleTrigger>
+        <CollapsibleContent>
+          <ScrollArea className="h-[calc(100vh-240px)]">
+            {!tree ? (
+              <div className="flex flex-col items-center gap-2 p-4 text-xs text-muted-foreground">
+                <span>No folder opened</span>
+                <Button size="sm" variant="outline" onClick={() => useFileStore.getState().openFolderDialog()}>
+                  <FolderOpen className="mr-1" /> Open Folder
+                </Button>
+              </div>
+            ) : (
+              <FileTree />
+            )}
+          </ScrollArea>
+        </CollapsibleContent>
+      </Collapsible>
+
+      {/* Outline section */}
+      <Collapsible defaultOpen>
+        <CollapsibleTrigger asChild>
+          <button className="flex w-full items-center gap-1.5 px-1 py-1.5 text-xs font-medium hover:bg-accent rounded">
+            <ChevronRight size={12} className="rotate-90" />
+            Outline
+          </button>
+        </CollapsibleTrigger>
+        <CollapsibleContent>
+          <ScrollArea className="h-[calc(100vh-240px)]">
+            <Outline />
+          </ScrollArea>
+        </CollapsibleContent>
+      </Collapsible>
+
+      {/* Git section */}
+      <Collapsible defaultOpen>
+        <CollapsibleTrigger asChild>
+          <button className="flex w-full items-center gap-1.5 px-1 py-1.5 text-xs font-medium hover:bg-accent rounded">
+            <ChevronRight size={12} className="rotate-90" />
+            Git
+          </button>
+        </CollapsibleTrigger>
+        <CollapsibleContent>
+          <ScrollArea className="h-[calc(100vh-240px)]">
+            <GitStatusPanel />
+          </ScrollArea>
+        </CollapsibleContent>
+      </Collapsible>
+    </div>
+  );
+}

src/renderer/components/theme-provider.tsx

@@ -0,0 +1,6 @@
+import { ThemeProvider as NextThemesProvider } from 'next-themes';
+import type { ComponentProps } from 'react';
+
+export function ThemeProvider({ children, ...props }: ComponentProps<typeof NextThemesProvider>) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>;
+}

src/renderer/components/theme-toggle.tsx

@@ -0,0 +1,30 @@
+import { useTheme } from 'next-themes';
+import { Moon, Sun } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { useEffect, useState } from 'react';
+
+export function ThemeToggle() {
+  const { resolvedTheme, setTheme } = useTheme();
+  const [mounted, setMounted] = useState(false);
+  useEffect(() => setMounted(true), []);
+
+  if (!mounted) {
+    return (
+      <Button variant="ghost" size="icon" aria-label="Toggle theme" className="opacity-0">
+        <Sun className="h-4 w-4" />
+      </Button>
+    );
+  }
+
+  const isDark = resolvedTheme === 'dark';
+  return (
+    <Button
+      variant="ghost"
+      size="icon"
+      aria-label="Toggle theme"
+      onClick={() => setTheme(isDark ? 'light' : 'dark')}
+    >
+      {isDark ? <Sun className="h-4 w-4" /> : <Moon className="h-4 w-4" />}
+    </Button>
+  );
+}

src/renderer/components/tools/PrintPreview.tsx

@@ -0,0 +1,57 @@
+import { X, Printer } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { MarkdownRenderer } from '@/components/preview/MarkdownRenderer';
+import { useExportSource } from '@/hooks/use-export-source';
+import { ipc } from '@/lib/ipc';
+
+interface Props {
+  onClose: () => void;
+}
+
+export function PrintPreview({ onClose }: Props) {
+  const source = useExportSource();
+
+  const handlePrint = async () => {
+    if (!source) return;
+    const html = `<!DOCTYPE html><html><head><meta charset="utf-8"><title>${source.title}</title></head><body><pre>${source.source.replace(/[<>&]/g, (c) => ({ '<': '&lt;', '>': '&gt;', '&': '&amp;' }[c] ?? c))}</pre></body></html>`;
+    await ipc.print({ html });
+  };
+
+  if (!source) {
+    return (
+      <div className="fixed inset-0 z-50 flex flex-col bg-background">
+        <div className="flex h-12 items-center justify-between border-b border-border bg-card/30 px-4">
+          <h2 className="font-semibold">Print preview</h2>
+          <Button variant="ghost" size="icon" onClick={onClose} aria-label="Close">
+            <X className="h-4 w-4" />
+          </Button>
+        </div>
+        <div className="flex flex-1 items-center justify-center text-muted-foreground">
+          No file open
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="fixed inset-0 z-50 flex flex-col bg-background">
+      <div className="flex h-12 items-center justify-between border-b border-border bg-card/30 px-4">
+        <h2 className="font-semibold">Print preview — {source.title}</h2>
+        <div className="flex gap-2">
+          <Button variant="outline" size="sm" onClick={handlePrint}>
+            <Printer className="mr-2 h-4 w-4" />
+            Print
+          </Button>
+          <Button variant="ghost" size="icon" onClick={onClose} aria-label="Close">
+            <X className="h-4 w-4" />
+          </Button>
+        </div>
+      </div>
+      <div className="flex-1 overflow-auto bg-card/20 p-8">
+        <div className="mx-auto max-w-3xl rounded border border-border bg-background p-8 shadow-lg">
+          <MarkdownRenderer source={source.source} />
+        </div>
+      </div>
+    </div>
+  );
+}

src/renderer/components/tools/ReplPanel.tsx

@@ -0,0 +1,57 @@
+import { useState, useEffect } from 'react';
+import { X } from 'lucide-react';
+import { Textarea } from '@/components/ui/textarea';
+import { Button } from '@/components/ui/button';
+import { useSettingsStore } from '@/stores/settings-store';
+import { renderMarkdown } from '@/lib/markdown';
+
+export function ReplPanel() {
+  const replOpen = useSettingsStore((s) => s.replOpen);
+  const setSetting = useSettingsStore((s) => s.setSetting);
+  const [source, setSource] = useState('# Markdown preview\n\nType here…');
+  const [debouncedSource, setDebouncedSource] = useState(source);
+
+  useEffect(() => {
+    const t = setTimeout(() => setDebouncedSource(source), 300);
+    return () => clearTimeout(t);
+  }, [source]);
+
+  if (!replOpen) return null;
+
+  const html = renderMarkdown(debouncedSource);
+
+  return (
+    <div
+      role="region"
+      aria-label="REPL"
+      className="fixed bottom-0 left-0 right-0 z-40 flex h-[30vh] flex-col border-t border-border bg-card/95 shadow-2xl backdrop-blur"
+      data-testid="repl-panel"
+    >
+      <div className="flex h-8 items-center justify-between border-b border-border bg-card/50 px-3 text-xs">
+        <span className="font-semibold">REPL — Markdown snippet preview</span>
+        <Button
+          variant="ghost"
+          size="icon"
+          aria-label="Close REPL"
+          onClick={() => setSetting('replOpen', false)}
+          className="h-6 w-6"
+        >
+          <X className="h-3 w-3" />
+        </Button>
+      </div>
+      <div className="flex flex-1 overflow-hidden">
+        <Textarea
+          value={source}
+          onChange={(e) => setSource(e.target.value)}
+          className="h-full flex-1 resize-none rounded-none border-r border-border font-mono text-xs"
+          aria-label="Markdown source"
+        />
+        <div
+          className="h-full flex-1 overflow-auto p-3 text-sm"
+          dangerouslySetInnerHTML={{ __html: html }}
+          data-testid="repl-preview"
+        />
+      </div>
+    </div>
+  );
+}

src/renderer/components/ui/button.tsx

@@ -0,0 +1,57 @@
+import * as React from "react"
+import { Slot } from "@radix-ui/react-slot"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const buttonVariants = cva(
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
+  {
+    variants: {
+      variant: {
+        default:
+          "bg-primary text-primary-foreground shadow hover:bg-primary/90",
+        destructive:
+          "bg-destructive text-destructive-foreground shadow-sm hover:bg-destructive/90",
+        outline:
+          "border border-input bg-background shadow-sm hover:bg-accent hover:text-accent-foreground",
+        secondary:
+          "bg-secondary text-secondary-foreground shadow-sm hover:bg-secondary/80",
+        ghost: "hover:bg-accent hover:text-accent-foreground",
+        link: "text-primary underline-offset-4 hover:underline",
+      },
+      size: {
+        default: "h-9 px-4 py-2",
+        sm: "h-8 rounded-md px-3 text-xs",
+        lg: "h-10 rounded-md px-8",
+        icon: "h-9 w-9",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+export interface ButtonProps
+  extends React.ButtonHTMLAttributes<HTMLButtonElement>,
+    VariantProps<typeof buttonVariants> {
+  asChild?: boolean
+}
+
+const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
+  ({ className, variant, size, asChild = false, ...props }, ref) => {
+    const Comp = asChild ? Slot : "button"
+    return (
+      <Comp
+        className={cn(buttonVariants({ variant, size, className }))}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Button.displayName = "Button"
+
+export { Button, buttonVariants }

src/renderer/components/ui/checkbox.tsx

@@ -0,0 +1,27 @@
+import * as React from "react"
+import * as CheckboxPrimitive from "@radix-ui/react-checkbox"
+import { Check } from "lucide-react"
+import { cn } from "@/lib/utils"
+
+const Checkbox = React.forwardRef<
+  React.ElementRef<typeof CheckboxPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof CheckboxPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <CheckboxPrimitive.Root
+    ref={ref}
+    className={cn(
+      "peer h-4 w-4 shrink-0 rounded-sm border border-primary ring-offset-background focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-primary data-[state=checked]:text-primary-foreground",
+      className
+    )}
+    {...props}
+  >
+    <CheckboxPrimitive.Indicator
+      className={cn("flex items-center justify-center text-current")}
+    >
+      <Check className="h-4 w-4" />
+    </CheckboxPrimitive.Indicator>
+  </CheckboxPrimitive.Root>
+))
+Checkbox.displayName = CheckboxPrimitive.Root.displayName
+
+export { Checkbox }

src/renderer/components/ui/collapsible.tsx

@@ -0,0 +1,11 @@
+"use client"
+
+import * as CollapsiblePrimitive from "@radix-ui/react-collapsible"
+
+const Collapsible = CollapsiblePrimitive.Root
+
+const CollapsibleTrigger = CollapsiblePrimitive.CollapsibleTrigger
+
+const CollapsibleContent = CollapsiblePrimitive.CollapsibleContent
+
+export { Collapsible, CollapsibleTrigger, CollapsibleContent }

src/renderer/components/ui/context-menu.tsx

@@ -0,0 +1,200 @@
+"use client"
+
+import * as React from "react"
+import * as ContextMenuPrimitive from "@radix-ui/react-context-menu"
+import { Check, ChevronRight, Circle } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const ContextMenu = ContextMenuPrimitive.Root
+
+const ContextMenuTrigger = ContextMenuPrimitive.Trigger
+
+const ContextMenuGroup = ContextMenuPrimitive.Group
+
+const ContextMenuPortal = ContextMenuPrimitive.Portal
+
+const ContextMenuSub = ContextMenuPrimitive.Sub
+
+const ContextMenuRadioGroup = ContextMenuPrimitive.RadioGroup
+
+const ContextMenuSubTrigger = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.SubTrigger>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.SubTrigger> & {
+    inset?: boolean
+  }
+>(({ className, inset, children, ...props }, ref) => (
+  <ContextMenuPrimitive.SubTrigger
+    ref={ref}
+    className={cn(
+      "flex cursor-default select-none items-center rounded-sm px-2 py-1.5 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[state=open]:bg-accent data-[state=open]:text-accent-foreground",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <ChevronRight className="ml-auto h-4 w-4" />
+  </ContextMenuPrimitive.SubTrigger>
+))
+ContextMenuSubTrigger.displayName = ContextMenuPrimitive.SubTrigger.displayName
+
+const ContextMenuSubContent = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.SubContent>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.SubContent>
+>(({ className, ...props }, ref) => (
+  <ContextMenuPrimitive.SubContent
+    ref={ref}
+    className={cn(
+      "z-50 min-w-[8rem] overflow-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-lg data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 origin-[--radix-context-menu-content-transform-origin]",
+      className
+    )}
+    {...props}
+  />
+))
+ContextMenuSubContent.displayName = ContextMenuPrimitive.SubContent.displayName
+
+const ContextMenuContent = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.Content>
+>(({ className, ...props }, ref) => (
+  <ContextMenuPrimitive.Portal>
+    <ContextMenuPrimitive.Content
+      ref={ref}
+      className={cn(
+        "z-50 max-h-[--radix-context-menu-content-available-height] min-w-[8rem] overflow-y-auto overflow-x-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-md data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 origin-[--radix-context-menu-content-transform-origin]",
+        className
+      )}
+      {...props}
+    />
+  </ContextMenuPrimitive.Portal>
+))
+ContextMenuContent.displayName = ContextMenuPrimitive.Content.displayName
+
+const ContextMenuItem = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.Item> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <ContextMenuPrimitive.Item
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm px-2 py-1.5 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+ContextMenuItem.displayName = ContextMenuPrimitive.Item.displayName
+
+const ContextMenuCheckboxItem = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.CheckboxItem>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.CheckboxItem>
+>(({ className, children, checked, ...props }, ref) => (
+  <ContextMenuPrimitive.CheckboxItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    checked={checked}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <ContextMenuPrimitive.ItemIndicator>
+        <Check className="h-4 w-4" />
+      </ContextMenuPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </ContextMenuPrimitive.CheckboxItem>
+))
+ContextMenuCheckboxItem.displayName =
+  ContextMenuPrimitive.CheckboxItem.displayName
+
+const ContextMenuRadioItem = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.RadioItem>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.RadioItem>
+>(({ className, children, ...props }, ref) => (
+  <ContextMenuPrimitive.RadioItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <ContextMenuPrimitive.ItemIndicator>
+        <Circle className="h-4 w-4 fill-current" />
+      </ContextMenuPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </ContextMenuPrimitive.RadioItem>
+))
+ContextMenuRadioItem.displayName = ContextMenuPrimitive.RadioItem.displayName
+
+const ContextMenuLabel = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.Label>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.Label> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <ContextMenuPrimitive.Label
+    ref={ref}
+    className={cn(
+      "px-2 py-1.5 text-sm font-semibold text-foreground",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+ContextMenuLabel.displayName = ContextMenuPrimitive.Label.displayName
+
+const ContextMenuSeparator = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <ContextMenuPrimitive.Separator
+    ref={ref}
+    className={cn("-mx-1 my-1 h-px bg-border", className)}
+    {...props}
+  />
+))
+ContextMenuSeparator.displayName = ContextMenuPrimitive.Separator.displayName
+
+const ContextMenuShortcut = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLSpanElement>) => {
+  return (
+    <span
+      className={cn(
+        "ml-auto text-xs tracking-widest text-muted-foreground",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+ContextMenuShortcut.displayName = "ContextMenuShortcut"
+
+export {
+  ContextMenu,
+  ContextMenuTrigger,
+  ContextMenuContent,
+  ContextMenuItem,
+  ContextMenuCheckboxItem,
+  ContextMenuRadioItem,
+  ContextMenuLabel,
+  ContextMenuSeparator,
+  ContextMenuShortcut,
+  ContextMenuGroup,
+  ContextMenuPortal,
+  ContextMenuSub,
+  ContextMenuSubContent,
+  ContextMenuSubTrigger,
+  ContextMenuRadioGroup,
+}

src/renderer/components/ui/dialog.tsx

@@ -0,0 +1,158 @@
+"use client"
+
+import * as React from "react"
+import { XIcon } from "lucide-react"
+import * as DialogPrimitive from "@radix-ui/react-dialog"
+
+import { cn } from "@/lib/utils"
+import { Button } from "@/components/ui/button"
+
+function Dialog({
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Root>) {
+  return <DialogPrimitive.Root data-slot="dialog" {...props} />
+}
+
+function DialogTrigger({
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Trigger>) {
+  return <DialogPrimitive.Trigger data-slot="dialog-trigger" {...props} />
+}
+
+function DialogPortal({
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Portal>) {
+  return <DialogPrimitive.Portal data-slot="dialog-portal" {...props} />
+}
+
+function DialogClose({
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Close>) {
+  return <DialogPrimitive.Close data-slot="dialog-close" {...props} />
+}
+
+function DialogOverlay({
+  className,
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Overlay>) {
+  return (
+    <DialogPrimitive.Overlay
+      data-slot="dialog-overlay"
+      className={cn(
+        "fixed inset-0 z-50 bg-black/50 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:animate-in data-[state=open]:fade-in-0",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function DialogContent({
+  className,
+  children,
+  showCloseButton = true,
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Content> & {
+  showCloseButton?: boolean
+}) {
+  return (
+    <DialogPortal data-slot="dialog-portal">
+      <DialogOverlay />
+      <DialogPrimitive.Content
+        data-slot="dialog-content"
+        className={cn(
+          "fixed top-[50%] left-[50%] z-50 grid w-full max-w-[calc(100%-2rem)] translate-x-[-50%] translate-y-[-50%] gap-4 rounded-lg border bg-background p-6 shadow-lg duration-200 outline-none data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[state=open]:animate-in data-[state=open]:fade-in-0 data-[state=open]:zoom-in-95 sm:max-w-lg",
+          className
+        )}
+        {...props}
+      >
+        {children}
+        {showCloseButton && (
+          <DialogPrimitive.Close
+            data-slot="dialog-close"
+            className="absolute top-4 right-4 rounded-xs opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:ring-2 focus:ring-ring focus:ring-offset-2 focus:outline-hidden disabled:pointer-events-none data-[state=open]:bg-accent data-[state=open]:text-muted-foreground [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4"
+          >
+            <XIcon />
+            <span className="sr-only">Close</span>
+          </DialogPrimitive.Close>
+        )}
+      </DialogPrimitive.Content>
+    </DialogPortal>
+  )
+}
+
+function DialogHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="dialog-header"
+      className={cn("flex flex-col gap-2 text-center sm:text-left", className)}
+      {...props}
+    />
+  )
+}
+
+function DialogFooter({
+  className,
+  showCloseButton = false,
+  children,
+  ...props
+}: React.ComponentProps<"div"> & {
+  showCloseButton?: boolean
+}) {
+  return (
+    <div
+      data-slot="dialog-footer"
+      className={cn(
+        "flex flex-col-reverse gap-2 sm:flex-row sm:justify-end",
+        className
+      )}
+      {...props}
+    >
+      {children}
+      {showCloseButton && (
+        <DialogPrimitive.Close asChild>
+          <Button variant="outline">Close</Button>
+        </DialogPrimitive.Close>
+      )}
+    </div>
+  )
+}
+
+function DialogTitle({
+  className,
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Title>) {
+  return (
+    <DialogPrimitive.Title
+      data-slot="dialog-title"
+      className={cn("text-lg leading-none font-semibold", className)}
+      {...props}
+    />
+  )
+}
+
+function DialogDescription({
+  className,
+  ...props
+}: React.ComponentProps<typeof DialogPrimitive.Description>) {
+  return (
+    <DialogPrimitive.Description
+      data-slot="dialog-description"
+      className={cn("text-sm text-muted-foreground", className)}
+      {...props}
+    />
+  )
+}
+
+export {
+  Dialog,
+  DialogClose,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogOverlay,
+  DialogPortal,
+  DialogTitle,
+  DialogTrigger,
+}

src/renderer/components/ui/form.tsx

@@ -0,0 +1,153 @@
+"use client"
+
+import * as React from "react"
+import * as LabelPrimitive from "@radix-ui/react-label"
+import { Slot } from "@radix-ui/react-slot"
+import {
+  Controller,
+  type ControllerProps,
+  type FieldPath,
+  type FieldValues,
+  useFormContext,
+} from "react-hook-form"
+
+import { cn } from "@/lib/utils"
+
+const Form = React.forwardRef<
+  HTMLFormElement,
+  React.ComponentProps<"form">
+>(({ className, ...props }, ref) => {
+  const methods = useFormContext()
+  return (
+    <form ref={ref} className={className} onSubmit={methods.handleSubmit(() => {})} {...props} />
+  )
+})
+Form.displayName = "Form"
+
+// ============================================================
+// FormFieldContext - provides field-level context
+// ============================================================
+
+const FormFieldContext = React.createContext<
+  ControllerProps<FieldValues, string>
+>({} as never)
+
+const FormField = <
+  TFieldValues extends FieldValues = FieldValues,
+  TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>
+>({
+  ...props
+}: ControllerProps<TFieldValues, TName>) => {
+  const { name } = props
+
+  return (
+    <FormFieldContext.Provider value={props as ControllerProps<FieldValues, string>}>
+      <Controller {...props} />
+    </FormFieldContext.Provider>
+  )
+}
+
+// ============================================================
+// useFormField - must be used inside a FormField
+// ============================================================
+
+function useFormField(): ControllerProps<FieldValues, string> {
+  const fieldContext = React.useContext(FormFieldContext)
+  if (!fieldContext) {
+    throw new Error("useFormField must be used within a FormField")
+  }
+  return fieldContext
+}
+
+// ============================================================
+// FormItem - wraps a labeled form control
+// ============================================================
+
+const FormItem = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => (
+  <div ref={ref} className={cn("space-y-2", className)} {...props} />
+))
+FormItem.displayName = "FormItem"
+
+// ============================================================
+// FormLabel
+// ============================================================
+
+const FormLabel = React.forwardRef<
+  React.ElementRef<typeof LabelPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <LabelPrimitive.Root
+    ref={ref}
+    className={cn(
+      "text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70",
+      className
+    )}
+    {...props}
+  />
+))
+FormLabel.displayName = LabelPrimitive.Root.displayName
+
+// ============================================================
+// FormControl - Slot bridge
+// ============================================================
+
+const FormControl = React.forwardRef<
+  React.ElementRef<typeof Slot>,
+  React.ComponentPropsWithoutRef<typeof Slot>
+>(({ ...props }, ref) => (
+  <Slot ref={ref} {...props} />
+))
+FormControl.displayName = "FormControl"
+
+// ============================================================
+// FormDescription
+// ============================================================
+
+const FormDescription = React.forwardRef<
+  HTMLParagraphElement,
+  React.HTMLAttributes<HTMLParagraphElement>
+>(({ className, ...props }, ref) => (
+  <p
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+))
+FormDescription.displayName = "FormDescription"
+
+// ============================================================
+// FormMessage
+// ============================================================
+
+const FormMessage = React.forwardRef<
+  HTMLParagraphElement,
+  React.HTMLAttributes<HTMLParagraphElement>
+>(({ className, children, ...props }, ref) => {
+  const { error } = useFormField()
+  const body = error ? String(error.message ?? "") : children
+  if (!body) return null
+  return (
+    <p
+      ref={ref}
+      className={cn("text-sm font-medium text-destructive", className)}
+      {...props}
+    >
+      {body}
+    </p>
+  )
+})
+FormMessage.displayName = "FormMessage"
+
+export {
+  Form,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormControl,
+  FormDescription,
+  FormMessage,
+  useFormField,
+}

src/renderer/components/ui/input.tsx

@@ -0,0 +1,25 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+export interface InputProps
+  extends React.InputHTMLAttributes<HTMLInputElement> {}
+
+const Input = React.forwardRef<HTMLInputElement, InputProps>(
+  ({ className, type, ...props }, ref) => {
+    return (
+      <input
+        type={type}
+        className={cn(
+          "h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Input.displayName = "Input"
+
+export { Input }

src/renderer/components/ui/label.tsx

@@ -0,0 +1,20 @@
+import * as React from "react"
+import * as LabelPrimitive from "@radix-ui/react-label"
+import { cn } from "@/lib/utils"
+
+const Label = React.forwardRef<
+  React.ElementRef<typeof LabelPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <LabelPrimitive.Root
+    ref={ref}
+    className={cn(
+      "text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70",
+      className
+    )}
+    {...props}
+  />
+))
+Label.displayName = LabelPrimitive.Root.displayName
+
+export { Label }

src/renderer/components/ui/radio-group.tsx

@@ -0,0 +1,41 @@
+import * as React from "react"
+import * as RadioGroupPrimitive from "@radix-ui/react-radio-group"
+import { Circle } from "lucide-react"
+import { cn } from "@/lib/utils"
+
+const RadioGroup = React.forwardRef<
+  React.ElementRef<typeof RadioGroupPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof RadioGroupPrimitive.Root>
+>(({ className, ...props }, ref) => {
+  return (
+    <RadioGroupPrimitive.Root
+      className={cn("grid gap-2", className)}
+      {...props}
+      ref={ref}
+    />
+  )
+})
+RadioGroup.displayName = RadioGroupPrimitive.Root.displayName
+
+const RadioGroupItem = React.forwardRef<
+  React.ElementRef<typeof RadioGroupPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof RadioGroupPrimitive.Item>
+>(({ className, ...props }, ref) => {
+  return (
+    <RadioGroupPrimitive.Item
+      ref={ref}
+      className={cn(
+        "aspect-square h-4 w-4 rounded-full border border-primary text-primary ring-offset-background focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
+        className
+      )}
+      {...props}
+    >
+      <RadioGroupPrimitive.Indicator className="flex items-center justify-center">
+        <Circle className="h-2.5 w-2.5 fill-current text-current" />
+      </RadioGroupPrimitive.Indicator>
+    </RadioGroupPrimitive.Item>
+  )
+})
+RadioGroupItem.displayName = RadioGroupPrimitive.Item.displayName
+
+export { RadioGroup, RadioGroupItem }

src/renderer/components/ui/resizable.tsx

@@ -0,0 +1,62 @@
+"use client"
+
+import * as React from "react"
+import { GripVertical } from "lucide-react"
+import * as ResizablePrimitive from "react-resizable-panels"
+
+import { cn } from "@/lib/utils"
+
+const ResizablePanelGroup = React.forwardRef<
+  React.ElementRef<typeof ResizablePrimitive.Group>,
+  React.ComponentPropsWithoutRef<typeof ResizablePrimitive.Group>
+>(({ className, ...props }, ref) => (
+  <ResizablePrimitive.Group
+    ref={ref}
+    className={cn(
+      "flex h-full w-full data-[panel-group-direction=vertical]:flex-col",
+      className
+    )}
+    {...props}
+  />
+))
+ResizablePanelGroup.displayName = "ResizablePanelGroup"
+
+const ResizablePanel = React.forwardRef<
+  React.ElementRef<typeof ResizablePrimitive.Panel>,
+  React.ComponentPropsWithoutRef<typeof ResizablePrimitive.Panel>
+>(({ className, ...props }, ref) => (
+  <ResizablePrimitive.Panel
+    ref={ref}
+    className={cn(
+      "h-full w-full overflow-hidden",
+      className
+    )}
+    {...props}
+  />
+))
+ResizablePanel.displayName = "ResizablePanel"
+
+const ResizableHandle = ({
+  withHandle,
+  className,
+  ...props
+}: React.ComponentPropsWithoutRef<typeof ResizablePrimitive.Separator> & {
+  withHandle?: boolean
+}) => (
+  <ResizablePrimitive.Separator
+    className={cn(
+      "relative flex w-px items-center justify-center bg-border after:absolute after:inset-y-0 after:left-1/2 after:w-1 after:-translate-x-1/2 focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring focus-visible:ring-offset-1 data-[panel-group-direction=vertical]:h-px data-[panel-group-direction=vertical]:w-full data-[panel-group-direction=vertical]:after:left-0 data-[panel-group-direction=vertical]:after:h-1 data-[panel-group-direction=vertical]:after:w-full data-[panel-group-direction=vertical]:after:-translate-y-1/2 data-[panel-group-direction=vertical]:after:translate-x-0 [&[data-panel-group-direction=vertical]>div]:rotate-90",
+      className
+    )}
+    {...props}
+  >
+    {withHandle && (
+      <div className="z-10 flex h-4 w-3 items-center justify-center rounded-sm border bg-border">
+        <GripVertical className="h-2.5 w-2.5" />
+      </div>
+    )}
+  </ResizablePrimitive.Separator>
+)
+ResizableHandle.displayName = "ResizableHandle"
+
+export { ResizablePanelGroup, ResizablePanel, ResizableHandle }

src/renderer/components/ui/scroll-area.tsx

@@ -0,0 +1,47 @@
+"use client"
+
+import * as React from "react"
+import * as ScrollAreaPrimitive from "@radix-ui/react-scroll-area"
+
+import { cn } from "@/lib/utils"
+
+const ScrollArea = React.forwardRef<
+  React.ElementRef<typeof ScrollAreaPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof ScrollAreaPrimitive.Root>
+>(({ className, children, ...props }, ref) => (
+  <ScrollAreaPrimitive.Root
+    ref={ref}
+    className={cn("relative overflow-hidden", className)}
+    {...props}
+  >
+    <ScrollAreaPrimitive.Viewport className="h-full w-full rounded-[inherit]">
+      {children}
+    </ScrollAreaPrimitive.Viewport>
+    <ScrollBar />
+    <ScrollAreaPrimitive.Corner />
+  </ScrollAreaPrimitive.Root>
+))
+ScrollArea.displayName = ScrollAreaPrimitive.Root.displayName
+
+const ScrollBar = React.forwardRef<
+  React.ElementRef<typeof ScrollAreaPrimitive.ScrollAreaScrollbar>,
+  React.ComponentPropsWithoutRef<typeof ScrollAreaPrimitive.ScrollAreaScrollbar>
+>(({ className, orientation = "vertical", ...props }, ref) => (
+  <ScrollAreaPrimitive.ScrollAreaScrollbar
+    ref={ref}
+    orientation={orientation}
+    className={cn(
+      "flex touch-none select-none transition-colors",
+      orientation === "vertical" &&
+        "h-full w-2.5 border-l border-l-transparent p-[1px]",
+      orientation === "horizontal" &&
+        "h-2.5 flex-col border-t border-t-transparent p-[1px]",
+      className
+    )}
+    {...props}
+  >
+    <ScrollAreaPrimitive.ScrollAreaThumb className="relative flex-1 rounded-full bg-border" />
+  </ScrollAreaPrimitive.ScrollAreaScrollbar>
+))
+ScrollBar.displayName = ScrollAreaPrimitive.ScrollAreaScrollbar.displayName
+export { ScrollArea, ScrollBar }

src/renderer/components/ui/select.tsx

@@ -0,0 +1,159 @@
+"use client"
+
+import * as React from "react"
+import * as SelectPrimitive from "@radix-ui/react-select"
+import { Check, ChevronDown, ChevronUp } from "lucide-react"
+import { cn } from "@/lib/utils"
+
+const Select = SelectPrimitive.Root
+
+const SelectGroup = SelectPrimitive.Group
+
+const SelectValue = SelectPrimitive.Value
+
+const SelectTrigger = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Trigger>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Trigger>
+>(({ className, children, ...props }, ref) => (
+  <SelectPrimitive.Trigger
+    ref={ref}
+    className={cn(
+      "flex h-10 w-full items-center justify-between rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 [&>span]:line-clamp-1",
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <SelectPrimitive.Icon asChild>
+      <ChevronDown className="h-4 w-4 opacity-50" />
+    </SelectPrimitive.Icon>
+  </SelectPrimitive.Trigger>
+))
+SelectTrigger.displayName = SelectPrimitive.Trigger.displayName
+
+const SelectScrollUpButton = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.ScrollUpButton>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollUpButton>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.ScrollUpButton
+    ref={ref}
+    className={cn(
+      "flex cursor-default items-center justify-center py-1",
+      className
+    )}
+    {...props}
+  >
+    <ChevronUp className="h-4 w-4" />
+  </SelectPrimitive.ScrollUpButton>
+))
+SelectScrollUpButton.displayName = SelectPrimitive.ScrollUpButton.displayName
+
+const SelectScrollDownButton = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.ScrollDownButton>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollDownButton>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.ScrollDownButton
+    ref={ref}
+    className={cn(
+      "flex cursor-default items-center justify-center py-1",
+      className
+    )}
+    {...props}
+  >
+    <ChevronDown className="h-4 w-4" />
+  </SelectPrimitive.ScrollDownButton>
+))
+SelectScrollDownButton.displayName =
+  SelectPrimitive.ScrollDownButton.displayName
+
+const SelectContent = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Content>
+>(({ className, children, position = "popper", ...props }, ref) => (
+  <SelectPrimitive.Portal>
+    <SelectPrimitive.Content
+      ref={ref}
+      className={cn(
+        "relative z-50 max-h-96 min-w-[8rem] overflow-hidden rounded-md border bg-popover text-popover-foreground shadow-md data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+        position === "popper" &&
+          "data-[side=bottom]:translate-y-1 data-[side=left]:-translate-x-1 data-[side=right]:translate-x-1 data-[side=top]:-translate-y-1",
+        className
+      )}
+      position={position}
+      {...props}
+    >
+      <SelectScrollUpButton />
+      <SelectPrimitive.Viewport
+        className={cn(
+          "p-1",
+          position === "popper" &&
+            "h-[var(--radix-select-trigger-height)] w-full min-w-[var(--radix-select-trigger-width)]"
+        )}
+      >
+        {children}
+      </SelectPrimitive.Viewport>
+      <SelectScrollDownButton />
+    </SelectPrimitive.Content>
+  </SelectPrimitive.Portal>
+))
+SelectContent.displayName = SelectPrimitive.Content.displayName
+
+const SelectLabel = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Label>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Label>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.Label
+    ref={ref}
+    className={cn("py-1.5 pl-8 pr-2 text-sm font-semibold", className)}
+    {...props}
+  />
+))
+SelectLabel.displayName = SelectPrimitive.Label.displayName
+
+const SelectItem = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Item>
+>(({ className, children, ...props }, ref) => (
+  <SelectPrimitive.Item
+    ref={ref}
+    className={cn(
+      "relative flex w-full cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <SelectPrimitive.ItemIndicator>
+        <Check className="h-4 w-4" />
+      </SelectPrimitive.ItemIndicator>
+    </span>
+
+    <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
+  </SelectPrimitive.Item>
+))
+SelectItem.displayName = SelectPrimitive.Item.displayName
+
+const SelectSeparator = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.Separator
+    ref={ref}
+    className={cn("-mx-1 my-1 h-px bg-muted", className)}
+    {...props}
+  />
+))
+SelectSeparator.displayName = SelectPrimitive.Separator.displayName
+
+export {
+  Select,
+  SelectGroup,
+  SelectValue,
+  SelectTrigger,
+  SelectContent,
+  SelectLabel,
+  SelectItem,
+  SelectSeparator,
+  SelectScrollUpButton,
+  SelectScrollDownButton,
+}

src/renderer/components/ui/sheet.tsx

@@ -0,0 +1,146 @@
+"use client"
+
+import * as React from "react"
+import * as SheetPrimitive from "@radix-ui/react-dialog"
+import { cva, type VariantProps } from "class-variance-authority"
+import { X } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const Sheet = SheetPrimitive.Root
+
+const SheetTrigger = SheetPrimitive.Trigger
+
+const SheetClose = SheetPrimitive.Close
+
+const SheetPortal = ({
+  className,
+  ...props
+}: SheetPrimitive.DialogPortalProps) => (
+  <SheetPrimitive.Portal className={cn(className)} {...props} />
+)
+SheetPortal.displayName = SheetPrimitive.Portal.displayName
+
+const SheetOverlay = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Overlay>,
+  React.ComponentPropsWithoutRef<typeof SheetPrimitive.Overlay>
+>(({ className, ...props }, ref) => (
+  <SheetPrimitive.Overlay
+    className={cn(
+      "fixed inset-0 z-50 bg-background/80 backdrop-blur-sm data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:animate-in data-[state=open]:fade-in-0",
+      className
+    )}
+    {...props}
+    ref={ref}
+  />
+))
+SheetOverlay.displayName = SheetPrimitive.Overlay.displayName
+
+const sheetVariants = cva(
+  "fixed z-50 gap-4 bg-background p-6 shadow-lg transition ease-in-out data-[state=closed]:animate-out data-[state=closed]:duration-300 data-[state=open]:animate-in data-[state=open]:duration-500",
+  {
+    variants: {
+      side: {
+        top: "inset-x-0 top-0 border-b data-[state=closed]:slide-out-to-top data-[state=open]:slide-in-from-top",
+        bottom:
+          "inset-x-0 bottom-0 border-t data-[state=closed]:slide-out-to-bottom data-[state=open]:slide-in-from-bottom",
+        left: "inset-y-0 left-0 h-full w-3/4 border-r data-[state=closed]:slide-out-to-left data-[state=open]:slide-in-from-left sm:max-w-sm",
+        right:
+          "inset-y-0 right-0 h-full w-3/4 border-l data-[state=closed]:slide-out-to-right data-[state=open]:slide-in-from-right sm:max-w-sm"
+      }
+    },
+    defaultVariants: {
+      side: "right"
+    }
+  }
+)
+
+interface SheetContentProps
+  extends React.ComponentPropsWithoutRef<typeof SheetPrimitive.Content>,
+    VariantProps<typeof sheetVariants> {}
+
+const SheetContent = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Content>,
+  SheetContentProps
+>(({ side = "right", className, children, ...props }, ref) => (
+  <SheetPortal>
+    <SheetOverlay />
+    <SheetPrimitive.Content
+      ref={ref}
+      className={cn(sheetVariants({ side }), className)}
+      {...props}
+    >
+      {children}
+      <SheetPrimitive.Close className="absolute top-4 right-4 rounded-sm opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:ring-2 focus:ring-ring focus:ring-offset-2 focus:outline-none disabled:pointer-events-none data-[state=open]:bg-secondary">
+        <X className="h-4 w-4" />
+        <span className="sr-only">Close</span>
+      </SheetPrimitive.Close>
+    </SheetPrimitive.Content>
+  </SheetPortal>
+))
+SheetContent.displayName = SheetPrimitive.Content.displayName
+
+const SheetHeader = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col space-y-2 text-center sm:text-left",
+      className
+    )}
+    {...props}
+  />
+)
+SheetHeader.displayName = "SheetHeader"
+
+const SheetFooter = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2",
+      className
+    )}
+    {...props}
+  />
+)
+SheetFooter.displayName = "SheetFooter"
+
+const SheetTitle = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Title>,
+  React.ComponentPropsWithoutRef<typeof SheetPrimitive.Title>
+>(({ className, ...props }, ref) => (
+  <SheetPrimitive.Title
+    ref={ref}
+    className={cn("text-lg font-semibold text-foreground", className)}
+    {...props}
+  />
+))
+SheetTitle.displayName = SheetPrimitive.Title.displayName
+
+const SheetDescription = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Description>,
+  React.ComponentPropsWithoutRef<typeof SheetPrimitive.Description>
+>(({ className, ...props }, ref) => (
+  <SheetPrimitive.Description
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+))
+SheetDescription.displayName = SheetPrimitive.Description.displayName
+
+export {
+  Sheet,
+  SheetPortal,
+  SheetOverlay,
+  SheetTrigger,
+  SheetClose,
+  SheetContent,
+  SheetHeader,
+  SheetFooter,
+  SheetTitle,
+  SheetDescription
+}

src/renderer/components/ui/slider.tsx

@@ -0,0 +1,33 @@
+"use client"
+
+import * as React from "react"
+import * as SliderPrimitive from "@radix-ui/react-slider"
+import { cn } from "@/lib/utils"
+
+const Slider = React.forwardRef<
+  React.ElementRef<typeof SliderPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof SliderPrimitive.Root>
+>(({ className, ...props }, ref) => {
+  const { 'aria-label': ariaLabel, ...rest } = props;
+  return (
+    <SliderPrimitive.Root
+      ref={ref}
+      className={cn(
+        "relative flex w-full touch-none select-none items-center",
+        className
+      )}
+      {...rest}
+    >
+      <SliderPrimitive.Track className="relative h-2 w-full grow overflow-hidden rounded-full bg-secondary">
+        <SliderPrimitive.Range className="absolute h-full bg-primary" />
+      </SliderPrimitive.Track>
+      <SliderPrimitive.Thumb
+        aria-label={ariaLabel}
+        className="block h-5 w-5 rounded-full border-2 border-primary bg-background ring-offset-background transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50"
+      />
+    </SliderPrimitive.Root>
+  );
+})
+Slider.displayName = SliderPrimitive.Root.displayName
+
+export { Slider }

src/renderer/components/ui/sonner.tsx

@@ -0,0 +1,34 @@
+"use client"
+
+import { useTheme } from "next-themes"
+import { Toaster as Sonner } from "sonner"
+
+type ToasterProps = React.ComponentProps<typeof Sonner>
+
+const Toaster = ({ ...props }: ToasterProps) => {
+  const { theme = "system" } = useTheme()
+
+  return (
+    <Sonner
+      theme={theme as ToasterProps["theme"]}
+      className="toaster group"
+      toastOptions={{
+        classNames: {
+          toast:
+            "group toast group-[.toaster]:bg-background group-[.toaster]:text-foreground group-[.toaster]:border-border group-[.toaster]:shadow-lg",
+          description: "group-[.toast]:text-muted-foreground",
+          actionButton:
+            "group-[.toast]:bg-primary group-[.toast]:text-primary-foreground",
+          cancelButton:
+            "group-[.toast]:bg-muted group-[.toast]:text-muted-foreground",
+        },
+      }}
+      richColors
+      closeButton
+      position="bottom-right"
+      {...props}
+    />
+  )
+}
+
+export { Toaster }

src/renderer/components/ui/switch.tsx

@@ -0,0 +1,26 @@
+import * as React from "react"
+import * as SwitchPrimitive from "@radix-ui/react-switch"
+import { cn } from "@/lib/utils"
+
+const Switch = React.forwardRef<
+  React.ElementRef<typeof SwitchPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof SwitchPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <SwitchPrimitive.Root
+    ref={ref}
+    className={cn(
+      "peer inline-flex h-6 w-11 shrink-0 cursor-pointer items-center rounded-full border-2 border-transparent transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-primary data-[state=unchecked]:bg-input",
+      className
+    )}
+    {...props}
+  >
+    <SwitchPrimitive.Thumb
+      className={cn(
+        "pointer-events-none block h-5 w-5 rounded-full bg-background shadow-lg ring-0 transition-transform data-[state=checked]:translate-x-5 data-[state=unchecked]:translate-x-0"
+      )}
+    />
+  </SwitchPrimitive.Root>
+))
+Switch.displayName = SwitchPrimitive.Root.displayName
+
+export { Switch }

src/renderer/components/ui/tabs.tsx

@@ -0,0 +1,91 @@
+"use client"
+
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+import * as TabsPrimitive from "@radix-ui/react-tabs"
+
+import { cn } from "@/lib/utils"
+
+function Tabs({
+  className,
+  orientation = "horizontal",
+  ...props
+}: React.ComponentProps<typeof TabsPrimitive.Root>) {
+  return (
+    <TabsPrimitive.Root
+      data-slot="tabs"
+      data-orientation={orientation}
+      orientation={orientation}
+      className={cn(
+        "group/tabs flex gap-2 data-[orientation=horizontal]:flex-col",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+const tabsListVariants = cva(
+  "group/tabs-list inline-flex w-fit items-center justify-center rounded-lg p-[3px] text-muted-foreground group-data-[orientation=horizontal]/tabs:h-9 group-data-[orientation=vertical]/tabs:h-fit group-data-[orientation=vertical]/tabs:flex-col data-[variant=line]:rounded-none",
+  {
+    variants: {
+      variant: {
+        default: "bg-muted",
+        line: "gap-1 bg-transparent",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+function TabsList({
+  className,
+  variant = "default",
+  ...props
+}: React.ComponentProps<typeof TabsPrimitive.List> &
+  VariantProps<typeof tabsListVariants>) {
+  return (
+    <TabsPrimitive.List
+      data-slot="tabs-list"
+      data-variant={variant}
+      className={cn(tabsListVariants({ variant }), className)}
+      {...props}
+    />
+  )
+}
+
+function TabsTrigger({
+  className,
+  ...props
+}: React.ComponentProps<typeof TabsPrimitive.Trigger>) {
+  return (
+    <TabsPrimitive.Trigger
+      data-slot="tabs-trigger"
+      className={cn(
+        "relative inline-flex h-[calc(100%-1px)] flex-1 items-center justify-center gap-1.5 rounded-md border border-transparent px-2 py-1 text-sm font-medium whitespace-nowrap text-foreground/60 transition-all group-data-[orientation=vertical]/tabs:w-full group-data-[orientation=vertical]/tabs:justify-start hover:text-foreground focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50 focus-visible:outline-1 focus-visible:outline-ring disabled:pointer-events-none disabled:opacity-50 group-data-[variant=default]/tabs-list:data-[state=active]:shadow-sm group-data-[variant=line]/tabs-list:data-[state=active]:shadow-none dark:text-muted-foreground dark:hover:text-foreground [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        "group-data-[variant=line]/tabs-list:bg-transparent group-data-[variant=line]/tabs-list:data-[state=active]:bg-transparent dark:group-data-[variant=line]/tabs-list:data-[state=active]:border-transparent dark:group-data-[variant=line]/tabs-list:data-[state=active]:bg-transparent",
+        "data-[state=active]:bg-background data-[state=active]:text-foreground dark:data-[state=active]:border-input dark:data-[state=active]:bg-input/30 dark:data-[state=active]:text-foreground",
+        "after:absolute after:bg-foreground after:opacity-0 after:transition-opacity group-data-[orientation=horizontal]/tabs:after:inset-x-0 group-data-[orientation=horizontal]/tabs:after:bottom-[-5px] group-data-[orientation=horizontal]/tabs:after:h-0.5 group-data-[orientation=vertical]/tabs:after:inset-y-0 group-data-[orientation=vertical]/tabs:after:-right-1 group-data-[orientation=vertical]/tabs:after:w-0.5 group-data-[variant=line]/tabs-list:data-[state=active]:after:opacity-100",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function TabsContent({
+  className,
+  ...props
+}: React.ComponentProps<typeof TabsPrimitive.Content>) {
+  return (
+    <TabsPrimitive.Content
+      data-slot="tabs-content"
+      className={cn("flex-1 outline-none", className)}
+      {...props}
+    />
+  )
+}
+
+export { Tabs, TabsList, TabsTrigger, TabsContent, tabsListVariants }

src/renderer/components/ui/textarea.tsx

@@ -0,0 +1,24 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+export interface TextareaProps
+  extends React.TextareaHTMLAttributes<HTMLTextAreaElement> {}
+
+const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
+  ({ className, ...props }, ref) => {
+    return (
+      <textarea
+        className={cn(
+          "flex min-h-[80px] w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Textarea.displayName = "Textarea"
+
+export { Textarea }

src/renderer/hooks/use-export-source.ts

@@ -0,0 +1,26 @@
+import { useFileStore } from '@/stores/file-store';
+import { useEditorStore } from '@/stores/editor-store';
+
+export interface ExportSource {
+  source: string;
+  path: string;
+  title: string;
+}
+
+/**
+ * Read the active buffer's content from the editor store. Returns null if
+ * no buffer is open. Components handle the null case (prompt to open a file).
+ */
+export function useExportSource(): ExportSource | null {
+  const activeTabId = useFileStore((s) => s.activeTabId);
+  const openTabs = useFileStore((s) => s.openTabs);
+  const buffer = useEditorStore((s) => (activeTabId ? s.buffers.get(activeTabId) : undefined));
+
+  if (!activeTabId || !buffer) return null;
+  const tab = openTabs.find((t) => t.id === activeTabId);
+  return {
+    source: buffer.content,
+    path: activeTabId,
+    title: tab?.title ?? activeTabId,
+  };
+}

src/renderer/hooks/use-file-shortcuts.ts

@@ -0,0 +1,72 @@
+import { useEffect } from 'react';
+import { useFileStore } from '@/stores/file-store';
+
+/**
+ * Global keyboard shortcuts for file operations.
+ *
+ * - Cmd/Ctrl+O: open file
+ * - Cmd/Ctrl+Shift+O: open folder
+ * - Cmd/Ctrl+S: save active buffer
+ * - Cmd/Ctrl+W: close active tab
+ * - Cmd/Ctrl+Tab / Cmd/Ctrl+Shift+Tab: next/previous tab (wraps)
+ *
+ * Suppressed when an <input>, <textarea>, or contentEditable element has focus.
+ */
+export function useFileShortcuts(): void {
+  useEffect(() => {
+    function isTypingTarget(target: EventTarget | null): boolean {
+      if (!(target instanceof HTMLElement)) return false;
+      const tag = target.tagName;
+      if (tag === 'INPUT' || tag === 'TEXTAREA') return true;
+      if (target.isContentEditable) return true;
+      return false;
+    }
+
+    function handle(e: KeyboardEvent): void {
+      const mod = e.metaKey || e.ctrlKey;
+      if (!mod) return;
+      if (isTypingTarget(e.target)) return;
+
+      const key = e.key.toLowerCase();
+
+      // Order matters: more specific (Shift) variants first so they don't get
+      // shadowed by the plain modifier-only branch.
+      if (e.shiftKey && key === 'o') {
+        e.preventDefault();
+        void useFileStore.getState().openFolderDialog();
+        return;
+      }
+      if (!e.shiftKey && key === 'o') {
+        e.preventDefault();
+        void useFileStore.getState().openFileDialog();
+        return;
+      }
+      if (!e.shiftKey && key === 's') {
+        e.preventDefault();
+        void useFileStore.getState().saveActiveBuffer();
+        return;
+      }
+      if (!e.shiftKey && key === 'w') {
+        e.preventDefault();
+        const { activeTabId, closeTab } = useFileStore.getState();
+        if (activeTabId) closeTab(activeTabId);
+        return;
+      }
+      if (key === 'tab') {
+        e.preventDefault();
+        const { openTabs, activeTabId, setActiveTab } = useFileStore.getState();
+        if (openTabs.length === 0) return;
+        const idx = activeTabId ? openTabs.findIndex((t) => t.id === activeTabId) : 0;
+        const safeIdx = idx === -1 ? 0 : idx;
+        const nextIdx = e.shiftKey
+          ? (safeIdx <= 0 ? openTabs.length - 1 : safeIdx - 1)
+          : (safeIdx >= openTabs.length - 1 ? 0 : safeIdx + 1);
+        setActiveTab(openTabs[nextIdx].id);
+        return;
+      }
+    }
+
+    window.addEventListener('keydown', handle);
+    return () => window.removeEventListener('keydown', handle);
+  }, []);
+}

src/renderer/hooks/use-menu-action.ts

@@ -0,0 +1,29 @@
+import { useEffect } from 'react';
+import { ipc } from '@/lib/ipc';
+import { useCommandStore } from '@/stores/command-store';
+import type { CommandId } from '@/stores/command-store';
+
+type Transform<Args = unknown> = (...payload: unknown[]) => Args;
+
+/**
+ * Bridge a native-menu IPC channel to a command-store dispatch.
+ *
+ * When the main process sends `channel` (e.g. `'file-save'`), the optional
+ * `transform` converts the payload to the command's args, then the command
+ * `commandId` is dispatched through the command store.
+ *
+ * The hook cleans up its IPC subscription on unmount.
+ */
+export function useMenuAction<Args = unknown>(
+  channel: string,
+  commandId: CommandId,
+  transform?: Transform<Args>
+): void {
+  useEffect(() => {
+    const unsubscribe = ipc.menu.on(channel, (...payload: unknown[]) => {
+      const args = transform ? transform(...payload) : (payload[0] as Args);
+      useCommandStore.getState().dispatch(commandId, args);
+    });
+    return unsubscribe;
+  }, [channel, commandId, transform]);
+}