fix: resolve editor, batch conversion, and startup performance issues

- Remove popout preview button (HTML, JS, CSS) - Fix Save/Save As flow for new untitled files - Fix batch conversion menu items (wire show-batch-converter IPC) - Add universal-convert-batch IPC handler for batch file conversion - Lazy-load mermaid, pdfjs-dist, sidebar panels, command palette - Switch highlight.js CSS from CDN to local - Defer CodeMirror language extensions until first use - Add show:false + ready-to-show for faster perceived startup - Install mermaid as local dependency (remove CDN script tag)
fix: resolve lint errors for v4 release
2026-08-03 02:11:07 +05:30 · 2026-03-04 17:44:04 +05:30 · 2026-03-04 16:35:56 +05:30 · 2026-03-04 16:33:38 +05:30 · 2026-03-04 16:33:00 +05:30 · 2026-03-04 16:31:28 +05:30
104 changed files with 15278 additions and 3220 deletions
@@ -1,43 +0,0 @@
 {
  "permissions": {
    "allow": [
      "Bash(git checkout:*)",
      "Bash(npm install)",
      "Bash(npm run build:*)",
      "Bash(rmdir:*)",
      "Bash(powershell:*)",
      "Bash(npx electron-builder:*)",
      "Bash(dir dist)",
      "Bash(git tag:*)",
      "Bash(git push:*)",
      "Bash(gh release create:*)",
      "Bash(gh auth:*)",
      "Bash(gh release delete:*)",
      "Bash(gh release list:*)",
      "Bash(gh release upload:*)",
      "Bash(npm install:*)",
      "Bash(npm uninstall:*)",
      "Bash(git add:*)",
      "Bash(git commit:*)",
      "Bash(npm start)",
      "Read(//h/**)",
      "Bash(cd:*)",
      "Bash(npm run build:win-unsigned:*)",
      "Bash(dir:*)",
      "Bash(git merge:*)",
      "Bash(timeout:*)",
      "Bash(findstr:*)",
      "Bash(git stash:*)",
      "Bash(npm start:*)",
      "Bash(gh release delete-asset:*)",
      "Bash(git rm:*)",
      "Bash(gh release view:*)",
      "Bash(npm run build:linux:*)",
      "Bash(git reset:*)",
      "Read(//i/Template_exporter/**)",
      "Bash(copy \"I:\\Template_exporter\\md_to_docx_converter.py\" \"H:\\Development\\pan-converter\\word-template-exporter\"\" && copy \"I:Template_exporterrequirements.txt\" \"H:Developmentpan-converterword-template-exporter\"\")",
      "Bash(copy \"I:\\Template_exporter\\word_template.docx\" \"H:\\Development\\pan-converter\\word-template-exporter\"\")"
    ],
    "deny": []
  }
 }
@@ -1,10 +0,0 @@
 name: New MCP server
 version: 0.0.1
 schema: v1
 mcpServers:
  - name: New MCP server
    command: npx
    args:
      - -y
      - <your-mcp-server>
    env: {}
@@ -15,4 +15,22 @@ out/
 .cache/
 .npm/
 .electron/
-package-lock.json
+package-lock.json
 # Screenshots and temp files
 *.png.bak
 Screen.png
 dark.png
 light.png
 pdf.png
 uvmodal.png
 nul
 *.tmp
 # Development screenshots
 pdf\ modal.png
 # Claude/AI development files
 .claude/
 CLAUDE.md
 agents.mdcoverage/
@@ -0,0 +1,11 @@
 {
  "semi": true,
  "singleQuote": true,
  "tabWidth": 2,
  "useTabs": false,
  "trailingComma": "es5",
  "bracketSpacing": true,
  "arrowParens": "always",
  "printWidth": 100,
  "endOfLine": "auto"
 }
@@ -1,3 +0,0 @@
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  "CurrentProjectSetting": null
 }
@@ -1,7 +0,0 @@
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  "ExpandedNodes": [
    ""
  ],
  "SelectedNode": "\\package.json",
  "PreviewInSolutionExplorer": false
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@@ -1,41 +0,0 @@
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  "WorkspaceRootPath": "H:\\Development\\pan-converter\\",
  "Documents": [
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      "AbsoluteMoniker": "D:0:0:{A2FE74E1-B743-11D0-AE1A-00A0C90FFFC3}|\u003CMiscFiles\u003E|H:\\Development\\pan-converter\\package.json||{90A6B3A7-C1A3-4009-A288-E2FF89E96FA0}",
      "RelativeMoniker": "D:0:0:{A2FE74E1-B743-11D0-AE1A-00A0C90FFFC3}|\u003CMiscFiles\u003E|solutionrelative:package.json||{90A6B3A7-C1A3-4009-A288-E2FF89E96FA0}"
    }
  ],
  "DocumentGroupContainers": [
    {
      "Orientation": 0,
      "VerticalTabListWidth": 256,
      "DocumentGroups": [
        {
          "DockedWidth": 200,
          "SelectedChildIndex": 0,
          "Children": [
            {
              "$type": "Document",
              "DocumentIndex": 0,
              "Title": "package.json",
              "DocumentMoniker": "H:\\Development\\pan-converter\\package.json",
              "RelativeDocumentMoniker": "package.json",
              "ToolTip": "H:\\Development\\pan-converter\\package.json",
              "RelativeToolTip": "package.json",
              "ViewState": "AgIAAAAAAAAAAAAAAAAAAAsAAAAqAAAAAAAAAA==",
              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.001642|",
              "WhenOpened": "2025-10-11T13:44:30.357Z",
              "EditorCaption": ""
            },
            {
              "$type": "Bookmark",
              "Name": "ST:0:0:{cce594b6-0c39-4442-ba28-10c64ac7e89f}"
            }
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 }
@@ -1,41 +0,0 @@
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  "Version": 1,
  "WorkspaceRootPath": "H:\\Development\\pan-converter\\",
  "Documents": [
    {
      "AbsoluteMoniker": "D:0:0:{A2FE74E1-B743-11D0-AE1A-00A0C90FFFC3}|\u003CMiscFiles\u003E|H:\\Development\\pan-converter\\package.json||{90A6B3A7-C1A3-4009-A288-E2FF89E96FA0}",
      "RelativeMoniker": "D:0:0:{A2FE74E1-B743-11D0-AE1A-00A0C90FFFC3}|\u003CMiscFiles\u003E|solutionrelative:package.json||{90A6B3A7-C1A3-4009-A288-E2FF89E96FA0}"
    }
  ],
  "DocumentGroupContainers": [
    {
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      "VerticalTabListWidth": 256,
      "DocumentGroups": [
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          "DockedWidth": 200,
          "SelectedChildIndex": 0,
          "Children": [
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              "$type": "Document",
              "DocumentIndex": 0,
              "Title": "package.json",
              "DocumentMoniker": "H:\\Development\\pan-converter\\package.json",
              "RelativeDocumentMoniker": "package.json",
              "ToolTip": "H:\\Development\\pan-converter\\package.json",
              "RelativeToolTip": "package.json",
              "ViewState": "AgIAAAAAAAAAAAAAAAAAAAsAAAAqAAAAAAAAAA==",
              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.001642|",
              "WhenOpened": "2025-10-11T13:44:30.357Z",
              "EditorCaption": ""
            },
            {
              "$type": "Bookmark",
              "Name": "ST:0:0:{cce594b6-0c39-4442-ba28-10c64ac7e89f}"
            }
          ]
        }
      ]
    }
  ]
 }
@@ -1,162 +1,156 @@
-# PanConverter
+# MarkdownConverter
-A cross-platform Markdown editor and converter powered by Pandoc.
+A powerful cross-platform Markdown editor and document converter powered by Pandoc, built with Electron. 100% open-source with no proprietary dependencies.
 ![PanConverter](assets/icon.png)
 ## Features
-### ✨ Advanced Markdown Editor
+### Markdown Editor
- 🗂️ **Tabbed Interface** - Work with multiple files simultaneously in separate tabs
+<img width="1920" height="1032" alt="image" src="https://github.com/user-attachments/assets/5f53ba94-7663-47c3-b12b-b7b8bd2645aa" />
- 📝 **Rich Text Editor** - Full-featured editor with syntax highlighting and comprehensive toolbar
+- **Multi-tab editing** - Work on multiple files simultaneously
- 🔍 **Find & Replace** - Powerful search and replace with match highlighting and navigation
+- **Live preview** - Real-time markdown rendering with syntax highlighting
- 🔢 **Line Numbers** - Toggle line numbers for easier code editing and navigation
+- **Dynamic splitter** - Drag to resize editor and preview panes
- ↩️ **Smart Auto-Indentation** - Automatic list continuation and intelligent indentation
+- **25+ themes** - Light and dark themes including Atom One Light, Dracula, Nord, Sepia, and more
- ⏪ **Undo/Redo** - Full undo/redo support with keyboard shortcuts
+- **Find & Replace** - Search and replace with regex support
- ⌨️ **Advanced Shortcuts** - Tab indentation, line selection, and smart text formatting
+- **Line numbers** - Toggle line numbers in the editor
- 📂 **File Association Support** - Open markdown files directly from file manager
+- **Auto-save** - Automatic saving every 30 seconds
 - **Math support** - KaTeX integration for mathematical expressions
-### 🎨 Themes & Interface
+### PDF Viewer & Editor
- 👁️ **Live Preview** - See your markdown rendered in real-time with synchronized scrolling
+<img width="1920" height="1032" alt="image" src="https://github.com/user-attachments/assets/f10f62be-af3d-496e-81df-37ab4f91abfd" />
 - 🎨 **Multiple Themes** - Choose from Light, Dark, Solarized, Monokai, or GitHub themes
 - 💾 **Auto-Save** - Never lose your work with automatic saving every 30 seconds
 - 📊 **Enhanced Statistics** - Detailed document statistics including word count, character count, lines, paragraphs, sentences, and estimated reading time
 - 🕒 **Recent Files** - Quick access to recently opened files via File menu
 - 🧮 **Math Support** - Render mathematical expressions using KaTeX (supports $$, $, \\[\\], \\(\\) delimiters)
-### 📤 Export & Conversion
+- **Built-in PDF viewer** - Open and view PDF files directly in the app
- 📄 **Enhanced PDF Export** - Robust PDF generation with multiple LaTeX engine fallbacks (XeLaTeX, PDFLaTeX, wkhtmltopdf)
+- **Page navigation** - Navigate pages with keyboard or buttons
- 📄 **Document Export** - Convert to HTML, DOCX, LaTeX, RTF, ODT, EPUB, PowerPoint (PPTX), and OpenDocument Presentation (ODP)
+- **Zoom controls** - Zoom in/out, fit to width, fit to page
- 📊 **Spreadsheet Export** - Export markdown tables to CSV format for compatibility with any spreadsheet application
+- **Rotation** - Rotate pages left or right
- 📥 **Document Import** - Import DOCX, ODT, RTF, HTML, PDF, and presentation files to markdown
+- **PDF Editor tools**:
- 📋 **Table Creation Helper** - Built-in table generator for easy markdown table creation
+  - Merge multiple PDFs
  - Split PDFs by page range
  - Compress PDFs
  - Rotate pages
  - Delete pages
  - Reorder pages
  - Add watermarks
  - Password protection
  - Remove passwords
  - Set permissions
-### 🖥️ Platform Support
+### Export Options
- **Cross-Platform** - Works seamlessly on Windows, macOS, and Linux
+- **PDF** - Export to PDF with customizable page sizes and orientation
 - **DOCX** - Standard and Enhanced (template-based) Word export
 - **ODT** - OpenDocument format
 - **HTML** - Web-ready HTML export
 - **PowerPoint** - PPTX presentation export
 - **EPUB** - E-book format
 - **LaTeX** - Academic document format
 - **RTF** - Rich Text Format
 ### Advanced Features
 - **Custom headers & footers** - Add headers/footers to exports with dynamic fields
 - **Page size configuration** - A3, A4, A5, B4, B5, Letter, Legal, Tabloid, or custom sizes
 - **Batch conversion** - Convert entire folders of markdown files
 - **ASCII Art Generator** - Create text banners and diagrams
 - **Word templates** - Use custom Word templates for enhanced exports
 - **Import documents** - Import from 30+ formats (DOCX, PDF, HTML, etc.)
 ## Installation
 ### Prerequisites
- [Pandoc](https://pandoc.org/installing.html) must be installed for export functionality
+- [Node.js](https://nodejs.org/) (v16 or later)
-  - **Ubuntu/Debian**: `sudo apt-get install pandoc`
+- [Pandoc](https://pandoc.org/installing.html) (required for export functionality)
  - **macOS**: `brew install pandoc`
  - **Windows**: Download installer from Pandoc website
-### PDF Export Requirements
+### Install Dependencies
 For optimal PDF export, install a LaTeX engine (recommended):
 - **Ubuntu/Debian**: `sudo apt-get install texlive-xetex texlive-latex-base`
 - **macOS**: `brew install --cask mactex`
 - **Windows**: Install MiKTeX or TeX Live
 - **Alternative**: `sudo apt-get install wkhtmltopdf` (fallback option)
 ### Download
 Download the latest release for your platform from the [Releases](https://github.com/amitwh/pan-converter/releases) page.
 #### Linux
 - **AppImage**: `PanConverter-1.5.0.AppImage` (universal, may require `--no-sandbox` flag)
 - **Debian Package**: `pan-converter_1.5.6_amd64.deb`
 - **Snap Package**: `pan-converter_1.5.6_amd64.snap`
 ### Install from Source
 ```bash
 git clone https://github.com/amitwh/pan-converter.git
 cd pan-converter
 npm install
 ```
 ### Run the Application
 ```bash
 npm start
 ```
-## Usage
+### Build for Distribution
 ```bash
 # Windows
 npm run build:win
-### Basic Workflow
+# macOS
-1. **Write** - Use the editor to write your Markdown content
+npm run build:mac
 2. **Preview** - Toggle the preview pane to see rendered output
 3. **Theme** - Choose your preferred theme from the View menu
 4. **Export** - Export your document to various formats
-### Export Options
+# Linux
- **Documents**: HTML, PDF, DOCX, LaTeX, RTF, ODT, EPUB
+npm run build:linux
- **Presentations**: PowerPoint (PPTX), OpenDocument Presentation (ODP)
+```
 - **Spreadsheets**: CSV format for tables (compatible with Excel, LibreOffice, Google Sheets)
 - **Advanced Export Options**: Optional template support, metadata insertion, table of contents, section numbering, and PDF-specific settings
 - **Batch Conversion**: Convert entire folders of markdown files with progress tracking
 ### Import & Conversion
 - **Import Documents**: Convert DOCX, ODT, RTF, HTML, PDF, and presentation files to Markdown
 - **Cross-Format Conversion**: Convert current file between multiple formats
 - **Smart Presentation Handling**: Automatic slide-level formatting for PPTX/ODP exports
 ### Table Creation
 - Click the table button in the toolbar
 - Specify number of rows and columns
 - Automatically generates properly formatted Markdown tables
 ## Keyboard Shortcuts
-### File Operations
+| Action | Shortcut |
- `Ctrl/Cmd + N` - New file/tab
+|--------|----------|
- `Ctrl/Cmd + T` - New tab
+| New File | Ctrl+N |
- `Ctrl/Cmd + W` - Close current tab
+| Open File | Ctrl+O |
- `Ctrl/Cmd + Tab` - Switch to next tab
+| Open PDF | Ctrl+Shift+O |
- `Ctrl/Cmd + O` - Open file
+| Save | Ctrl+S |
- `Ctrl/Cmd + S` - Save file
+| Save As | Ctrl+Shift+S |
- `Ctrl/Cmd + Shift + S` - Save as
+| Export | Ctrl+E |
- `Ctrl/Cmd + I` - Import document
+| Print | Ctrl+P |
 | Find | Ctrl+F |
 | Undo | Ctrl+Z |
 | Redo | Ctrl+Shift+Z |
 | New Tab | Ctrl+T |
 | Close Tab | Ctrl+W |
 | Toggle Preview | Ctrl+Shift+P |
 | Zoom In | Ctrl+Shift++ |
 | Zoom Out | Ctrl+Shift+- |
-### Editor Features
+## Themes
 - `Ctrl/Cmd + F` - Find & Replace
 - `Ctrl/Cmd + Z` - Undo
 - `Ctrl/Cmd + Shift + Z` - Redo
 - `Tab` - Indent lines or insert 4 spaces
 - `Shift + Tab` - Outdent selected lines
 - `Enter` - Auto-continue lists with proper indentation
-### View & Navigation
+### Light Themes
- `Ctrl/Cmd + P` - Toggle preview
+- Atom One Light (Default)
- `Ctrl/Cmd + Enter` - Toggle preview (alternative)
+- GitHub Light
- `Escape` - Close find dialog
+- Light
 - Solarized Light
 - Gruvbox Light
 - Ayu Light
 - Sepia
 - Paper
 - Rose Pine Dawn
 - Concrete Light
-## Building
+### Dark Themes
 - Dark
 - One Dark
 - Dracula
 - Nord
 - Monokai
 - Material
 - Gruvbox Dark
 - Tokyo Night
 - Palenight
 - Ayu Dark
 - Ayu Mirage
 - Oceanic Next
 - Cobalt2
 - Concrete Dark
 - Concrete Warm
-```bash
+## PDF Viewer
 # Install dependencies
 npm install
-# Generate icons
+Open PDF files directly in MarkdownConverter:
-npm run generate-icons
+- **File > Open PDF** or **Ctrl+Shift+O**
 - Navigate pages with arrow buttons or page input
 - Zoom controls: +/- buttons, Fit Width, Fit Page
 - Rotate pages left or right
 - Close PDF to return to editor
-# Build for current platform
+## Open Source
 npm run build
-# Build for specific platform
+MarkdownConverter is 100% open-source. All dependencies are permissively licensed:
-npm run build:win    # Windows
+- **Electron** - MIT License
-npm run build:mac    # macOS  
+- **pdf-lib** - MIT License
-npm run build:linux  # Linux (generates .deb, .AppImage, and .snap)
+- **pdfjs-dist** - Apache 2.0 License
-
+- **marked** - MIT License
-# Build for all platforms
+- **highlight.js** - BSD 3-Clause License
-npm run dist:all
+- **dompurify** - Apache 2.0/MIT License
-```
+- **docx** - MIT License
-
+- **xlsx** - Apache 2.0 License (SheetJS Community Edition)
 ## Version History
 - **v1.8.0** - Added enhanced Word export with template support to batch converter
 - **v1.7.9** - Enhanced Word Export with Template Support: Template-based DOCX generation with custom templates, table styling, ASCII art support, and red-colored flowchart arrows
 - **v1.5.6** - (Your release notes here)
 - **v1.5.5** - Refactored PDF export, simplified Pandoc pathing, and removed XLSX dependency.
 - **v1.3.1** - Bug fixes: Fixed file associations for double-clicking .md files, corrected 50/50 layout alignment for editor/preview panes
 - **v1.3.0** - Major update: Tabbed interface for multiple files, enhanced PDF export with LaTeX engines, fixed file associations, removed redundant converter menu, improved UI architecture
 - **v1.2.1** - Comprehensive editor enhancements: Find & Replace, Line Numbers, Undo/Redo, Auto-indentation, PowerPoint export, document conversion menu, table creation helper, spreadsheet export
 - **v1.1.0** - Added Excel/ODS spreadsheet export, updated author information, renamed to PanConverter
 - **v1.0.0** - Initial release with basic markdown editing, themes, and Pandoc export
 ## Known Issues
 - AppImage may require `--no-sandbox` flag on some Linux systems
 - Windows/Mac builds require platform-specific build environments
 - Large files may cause performance issues
 ## Contributing
 Contributions are welcome! Please feel free to submit a Pull Request to the [GitHub repository](https://github.com/amitwh/pan-converter).
 ## License
@@ -164,13 +158,8 @@ MIT License - see LICENSE file for details.
 ## Author
-**Amit Haridas** - [amit.wh@gmail.com](mailto:amit.wh@gmail.com)
+Amit Haridas (amit.wh@gmail.com)
-## Acknowledgments
+## Version
- Built with [Electron](https://www.electronjs.org/)
+v3.0.0
 - Markdown parsing by [marked](https://marked.js.org/)
 - Export functionality powered by [Pandoc](https://pandoc.org/)
 - Syntax highlighting by [highlight.js](https://highlightjs.org/)
 - Spreadsheet export by [XLSX](https://www.npmjs.com/package/xlsx)
 - HTML sanitization by [DOMPurify](https://www.npmjs.com/package/dompurify)
@@ -0,0 +1,217 @@
 # PanConverter - Updates & Changelog
 ## Version 4.0.0 (2026-03-04)
 ### Major Changes
 - **CodeMirror 6 Editor** — Replaced textarea with CodeMirror 6 featuring syntax highlighting, code folding, bracket matching, multiple cursors, and auto-indent
 - **Sidebar Panel System** — Collapsible sidebar with File Explorer, Git, Snippets, and Templates panels
 - **Command Palette** — Ctrl+Shift+P to search and execute all app actions
 - **Code Execution (REPL)** — Run JavaScript, Python, and Bash code blocks directly from the preview
 ### New Features
 - Print Preview dialog with paper size, orientation, margins, scale, and page range controls
 - Image paste from clipboard and drag-drop support with auto-save to assets folder
 - Document templates library (10 templates: blog post, meeting notes, tech spec, changelog, README, project plan, API docs, tutorial, release notes, comparison)
 - Markdown extensions: footnotes, admonitions (note/warning/tip/danger/info), and [[toc]] table of contents
 - PlantUML diagram rendering alongside Mermaid
 - Welcome tab with onboarding and "What's New" feature showcase
 - System spell checking with context menu suggestions and dictionary support
 - Enhanced status bar with word count, character count, line/column, encoding, and language mode
 - Grouped toolbar with visual section separators
 - Breadcrumb bar showing current file path
 ### New Export/Import Formats
 - Reveal.js slides (.html)
 - Beamer slides (.pdf)
 - Confluence/Jira wiki markup (.txt)
 - MOBI e-books (via Calibre)
 - Developer formats: JSON, YAML, XML, TOML
 ### Security
 - Content Security Policy (CSP) meta tag
 - File size validation (50MB limit)
 - Error message sanitization (stripped file paths)
 - Conversion rate limiting (2-second debounce)
 ### Dependencies Updated
 - marked: 16.x to 17.x (with marked-highlight extension)
 - pdfjs-dist: 3.x to 5.x (new worker model)
 - html2pdf.js: 0.10 to 0.14
 - pdfkit: 0.14 to 0.17
 - dompurify, docx, and others updated to latest
 ### Testing
 - 80 tests across 7 test suites
 - New tests for sidebar manager, command palette, print preview, markdown extensions, and utility functions
 ### Breaking Changes
 - Editor is now CodeMirror 6 (replaces textarea)
 - marked API changed to use marked.use() instead of marked.setOptions()
 - pdfjs-dist upgraded to v5 with new worker model
 ---
 ## Version 2.1.0 (December 14, 2025)
 ### 🎨 UI/UX Improvements
 #### Subtle & Small Preview Popout Button
 - Redesigned popout button with minimalist aesthetic
 - Removed border for cleaner appearance
 - Reduced size: 11px font, 2px×6px padding (previously 14px font, 4px×8px padding)
 - Added opacity transition: 50% when idle, 100% on hover
 - Subtle background effect on hover instead of heavy border styling
 - **File**: `src/styles.css:195-211`
 #### Simplified Table Headers in Preview
 - Removed gradient background from table headers in modern theme
 - Changed from `var(--primary-gradient)` (purple gradient) to simple light gray (#f0f0f0)
 - Updated text color to dark (#333333) for better readability
 - Clean, professional appearance matching standard themes
 - **File**: `src/styles-modern.css:445-449`
 ### 📥 Enhanced Import Capabilities
 #### Comprehensive Format-to-Markdown Conversion
 Dramatically expanded the "Import Document" feature to support 30+ file formats:
 **Supported Formats:**
 - **Documents**: DOCX, ODT, RTF, HTML, HTM, TEX, EPUB, PDF, TXT
 - **Presentations**: PPTX, ODP
 - **Markup Languages**: RST, Textile, MediaWiki, Org-mode, AsciiDoc, TWiki, OPML
 - **E-book Formats**: EPUB, FB2
 - **LaTeX Formats**: TEX, LATEX, LTX
 - **Web Formats**: HTML, HTM, XHTML
 - **Wiki Formats**: MediaWiki, DokuWiki, TikiWiki, TWiki
 - **Data Formats**: CSV, TSV, JSON
 **Format-Specific Optimizations:**
 - PDF text extraction with XeLaTeX engine
 - CSV/TSV automatic table conversion
 - JSON structure handling
 - Improved error messages with format hints
 **Access**: File → Import Document (Ctrl+I)
 **File**: `src/main.js:1933-1994`
 ### 🎨 Exhaustive ASCII Art Generator
 #### 5 New Text Banner Styles
 Complete alphabet (A-Z) and numbers (0-9) support for all styles:
 1. **Standard** - Classic ASCII art with slashes and underscores
 2. **Banner** - Large format using # characters (7-line height)
 3. **Block** - Modern Unicode block characters (█ ╔ ╗ ═ ║)
 4. **Bubble** - Circular bubble letters (Ⓐ Ⓑ Ⓒ)
 5. **Digital** - Digital display style (▄ ▀ ▐ ▌)
 **File**: `src/renderer.js:3397-3537`
 #### 19 Professional ASCII Templates
 Organized into 4 categories with expanded options:
 **Arrows & Flow (4 templates):**
 - Arrow Right - Horizontal flow indicators
 - Arrow Down - Vertical flow indicators
 - Decision - Binary decision diagrams
 - Process Flow - Multi-step process visualization
 **Diagrams & Charts (6 templates):**
 - Flowchart - Advanced flowchart with decision branches and loops
 - Sequence - Sequence diagrams for User-System-Database interactions
 - Network - Server-client network topology
 - Hierarchy - Organizational tree structures
 - Timeline - Milestone visualization with dates
 - Table Simple - Basic table template with borders
 **Boxes & Containers (4 templates):**
 - Header - Section header with decorative borders
 - Note Box - Important notes with rounded corners (┏━━┓)
 - Warning Box - Warning messages with bold borders (╔═══╗)
 - Info Box - Information boxes with subtle styling (╭───╮)
 **Decorative Elements (6 templates):**
 - Divider - Horizontal section separator (═══)
 - Separator Fancy - Elegant rounded divider
 - Brackets - Japanese-style brackets 【 】
 - Banner Stars - Star-bordered banners
 - Checklist - Task lists with ✓ checkmarks
 - Progress Bar - Visual progress indicators
 **Features:**
 - All ASCII art automatically wrapped in code blocks for proper rendering
 - Preserved formatting in markdown preview and all export formats
 - Categorized template selection interface
 - Real-time preview generation
 **Access**: Tools → ASCII Art Generator
 **Files**: `src/renderer.js:3513-3671`, `src/index.html:427-466`
 ### 📝 Technical Improvements
 - Enhanced ASCII art detection in Word template exporter
 - Improved monospace font rendering across all export formats
 - Better code block preservation in PDF and Word exports
 - Optimized template categorization and organization
 ### 🔧 Files Modified
 - `src/styles.css` - Preview popout button styling
 - `src/styles-modern.css` - Table header simplification
 - `src/main.js` - Enhanced import function, version update
 - `src/renderer.js` - ASCII art generator enhancements
 - `src/index.html` - ASCII template UI organization
 - `package.json` - Version bump to 2.1.0
 ---
 ## Version 2.0.0 (Previous Release)
 ### Major Features
 - Export Profiles - Save and reuse export configurations
 - Mermaid.js diagram support
 - Command Palette (Ctrl+Shift+P)
 - GitHub Light/Dark preview themes
 - Table Generator
 - ASCII Art Generator (basic)
 - Resizable Preview Pane
 - Pop-out Preview Window
 - Configurable page sizes (A3-A5, B4-B5, Letter, Legal, Tabloid, Custom)
 - Custom Headers & Footers for exports
 - Enhanced PDF and Word export with templates
 - 22 beautiful themes
 ### Core Capabilities
 - Cross-platform markdown editor with live preview
 - Universal document conversion (30+ formats)
 - PDF Editor (merge, split, compress, rotate, watermark, encrypt)
 - Batch file conversion
 - File association support
 - Advanced export options
 - Multi-tab interface
 ---
 ## Installation & Usage
 ### Prerequisites
 - **Pandoc** - Required for document conversion
 - **Optional**: LibreOffice, ImageMagick, FFmpeg for universal converter
 ### Download
 Get the latest release from: https://github.com/amitwh/pan-converter/releases
 ### Supported Platforms
 - Windows (x64)
 - Linux (AppImage, .deb, .snap)
 - macOS (planned)
 ---
 ## Contributing
 Contributions are welcome! Please see [CLAUDE.md](CLAUDE.md) for development guidelines.
 **Author**: Amit Haridas (amit.wh@gmail.com)
 **License**: MIT
 **Repository**: https://github.com/amitwh/pan-converter
@@ -1,8 +0,0 @@
 <svg width="256" height="256" viewBox="0 0 256 256" xmlns="http://www.w3.org/2000/svg">
  <rect width="256" height="256" rx="32" fill="#4A90E2"/>
  <g transform="translate(40, 40)">
    <path d="M20 40 L20 136 L80 136 L80 100 L56 100 L56 76 L80 76 L80 40 Z" fill="white" opacity="0.9"/>
    <path d="M96 40 L96 136 L156 136 L156 100 L132 100 L132 88 L156 88 L156 52 L132 52 L132 40 Z" fill="white" opacity="0.9"/>
  </g>
  <text x="128" y="200" font-family="Arial, sans-serif" font-size="24" font-weight="bold" text-anchor="middle" fill="white">PAN</text>
 </svg>
@@ -0,0 +1,111 @@
 /**
 * ESLint Configuration for PanConverter
 * Uses flat config format (ESLint 9+)
 */
 module.exports = [
  {
    // Global ignores
    ignores: [
      'node_modules/**',
      'dist/**',
      'coverage/**',
      '*.min.js'
    ]
  },
  {
    // JavaScript files
    files: ['**/*.js'],
    languageOptions: {
      ecmaVersion: 2022,
      sourceType: 'module',
      globals: {
        // Node.js
        require: 'readonly',
        module: 'readonly',
        exports: 'readonly',
        __dirname: 'readonly',
        __filename: 'readonly',
        process: 'readonly',
        Buffer: 'readonly',
        console: 'readonly',
        setTimeout: 'readonly',
        setInterval: 'readonly',
        clearTimeout: 'readonly',
        clearInterval: 'readonly',
        // Browser
        window: 'readonly',
        document: 'readonly',
        localStorage: 'readonly',
        alert: 'readonly',
        prompt: 'readonly',
        confirm: 'readonly',
        Event: 'readonly',
        CustomEvent: 'readonly',
        HTMLElement: 'readonly',
        MutationObserver: 'readonly',
        TextEncoder: 'readonly',
        FileReader: 'readonly',
        requestAnimationFrame: 'readonly',
        cancelAnimationFrame: 'readonly',
        navigator: 'readonly',
        location: 'readonly',
        fetch: 'readonly',
        URL: 'readonly',
        Blob: 'readonly',
        Image: 'readonly',
        DragEvent: 'readonly',
        ClipboardEvent: 'readonly',
        KeyboardEvent: 'readonly',
        MouseEvent: 'readonly',
        NodeList: 'readonly',
        HTMLInputElement: 'readonly',
        HTMLTextAreaElement: 'readonly',
        getComputedStyle: 'readonly',
        // Electron
        electronAPI: 'readonly',
        // Libraries
        marked: 'readonly',
        DOMPurify: 'readonly',
        hljs: 'readonly',
        mermaid: 'readonly',
        // Node.js global object
        global: 'writable',
        // Jest
        jest: 'readonly',
        describe: 'readonly',
        test: 'readonly',
        expect: 'readonly',
        beforeEach: 'readonly',
        afterEach: 'readonly',
        beforeAll: 'readonly',
        afterAll: 'readonly'
      }
    },
    rules: {
      // Error prevention
      'no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
      'no-undef': 'error',
      'no-console': 'off', // Allow console for Electron apps
      // Code quality
      'eqeqeq': ['warn', 'always'],
      'no-var': 'warn',
      'prefer-const': 'warn',
      // Style (handled by Prettier)
      'semi': 'off',
      'quotes': 'off',
      'indent': 'off',
      // Async handling
      'no-async-promise-executor': 'warn',
      'require-await': 'off',
      // Security
      'no-eval': 'error',
      'no-implied-eval': 'error',
      'no-new-func': 'error'
    }
  }
 ];
@@ -0,0 +1,61 @@
 /**
 * Jest Configuration for PanConverter
 * @version 2.2.0
 */
 module.exports = {
  // Test environment
  testEnvironment: 'jsdom',
  // Root directory
  rootDir: '.',
  // Test file patterns
  testMatch: [
    '**/tests/**/*.test.js',
    '**/tests/**/*.spec.js'
  ],
  // Coverage configuration
  collectCoverageFrom: [
    'src/**/*.js',
    '!src/main.js', // Main process needs electron-mock
    '!src/renderer.js', // Large renderer file with duplicate declarations
    '!src/preload.js', // Electron preload requires contextBridge
    '!**/node_modules/**'
  ],
  // Coverage thresholds (raised with expanded test suite)
  coverageThreshold: {
    global: {
      branches: 10,
      functions: 15,
      lines: 15,
      statements: 15
    }
  },
  // Transform settings (no transpilation needed for vanilla JS)
  transform: {},
  // Module paths
  moduleDirectories: ['node_modules', 'src'],
  // Setup files
  setupFilesAfterEnv: ['<rootDir>/tests/setup.js'],
  // Ignore patterns
  testPathIgnorePatterns: [
    '/node_modules/',
    '/dist/'
  ],
  // Verbose output
  verbose: true,
  // Clear mocks between tests
  clearMocks: true,
  // Reset modules between tests
  resetModules: true
 };
@@ -1,13 +1,20 @@
 {
-  "name": "pan-converter",
+  "name": "markdown-converter",
-  "version": "1.8.1",
+  "version": "4.0.0",
-  "description": "Cross-platform Markdown editor and converter using Pandoc",
+  "description": "Professional Markdown editor and universal file converter with PDF editing, batch processing, and syntax highlighting",
  "main": "src/main.js",
  "scripts": {
    "start": "electron .",
-    "test": "echo \"Error: no test specified\" && exit 1",
+    "test": "jest",
    "test:watch": "jest --watch",
    "test:coverage": "jest --coverage",
    "lint": "eslint src tests",
    "lint:fix": "eslint src tests --fix",
    "format": "prettier --write src tests",
    "format:check": "prettier --check src tests",
    "build": "electron-builder",
-    "build:win": "cross-env CSC_LINK=code-signing-cert.pfx CSC_KEY_PASSWORD=PanConverter2024! electron-builder --win",
+    "build:win": "electron-builder --win",
    "build:win-signed": "cross-env CSC_LINK=code-signing-cert.pfx CSC_KEY_PASSWORD=%CSC_KEY_PASSWORD% electron-builder --win",
    "build:win-unsigned": "cross-env CSC_IDENTITY_AUTO_DISCOVERY=false electron-builder --win",
    "build:mac": "electron-builder --mac",
    "build:linux": "electron-builder --linux",
@@ -19,35 +26,69 @@
    "markdown",
    "pandoc",
    "converter",
-    "editor"
+    "editor",
    "pdf",
    "audio",
    "video",
    "image"
  ],
-  "author": "Amit Haridas <amit.wh@gmail.com>",
+  "author": "ConcreteInfo <amit.wh@gmail.com>",
  "license": "MIT",
  "repository": {
    "type": "git",
    "url": "https://github.com/amitwh/markdown-converter"
  },
  "devDependencies": {
    "@testing-library/dom": "^10.4.1",
    "cross-env": "^10.0.0",
    "electron": "^37.4.0",
    "electron-builder": "^26.0.12",
    "eslint": "^9.39.2",
    "eslint-config-prettier": "^10.1.8",
    "eslint-plugin-prettier": "^5.5.4",
    "jest": "^30.2.0",
    "jest-environment-jsdom": "^30.2.0",
    "prettier": "^3.7.4",
    "sharp": "^0.34.3"
  },
  "dependencies": {
    "@codemirror/autocomplete": "^6.20.1",
    "@codemirror/commands": "^6.10.2",
    "@codemirror/lang-css": "^6.3.1",
    "@codemirror/lang-html": "^6.4.11",
    "@codemirror/lang-javascript": "^6.2.5",
    "@codemirror/lang-json": "^6.0.2",
    "@codemirror/lang-markdown": "^6.5.0",
    "@codemirror/lang-python": "^6.2.1",
    "@codemirror/language": "^6.12.2",
    "@codemirror/lint": "^6.9.5",
    "@codemirror/search": "^6.6.0",
    "@codemirror/state": "^6.5.4",
    "@codemirror/theme-one-dark": "^6.1.3",
    "@codemirror/view": "^6.39.16",
    "codemirror": "^6.0.2",
    "core-util-is": "^1.0.3",
-    "docx": "^9.5.1",
+    "docx": "^9.6.0",
    "docx4js": "^3.3.0",
-    "dompurify": "^3.2.6",
+    "dompurify": "^3.3.1",
    "electron-store": "^10.1.0",
    "highlight.js": "^11.11.1",
-    "html2pdf.js": "^0.10.1",
+    "html2pdf.js": "^0.14.0",
-    "marked": "^16.2.1",
+    "marked": "^17.0.3",
    "marked-footnote": "^1.4.0",
    "marked-highlight": "^2.2.3",
    "mermaid": "^11.12.3",
    "pdf-lib": "^1.17.1",
-    "pdfkit": "^0.14.0",
+    "pdfjs-dist": "^5.5.207",
    "pdfkit": "^0.17.2",
    "pizzip": "^3.2.0",
    "simple-git": "^3.32.3",
    "tslib": "^2.8.1",
    "xlsx": "^0.18.5"
  },
  "build": {
-    "appId": "com.panconverter.app",
+    "appId": "com.concreteinfo.markdownconverter",
-    "productName": "PanConverter",
+    "productName": "MarkdownConverter",
    "directories": {
      "output": "dist"
    },
@@ -73,10 +114,18 @@
        "description": "Markdown Document",
        "mimeType": "text/markdown",
        "role": "Editor"
      },
      {
        "ext": "pdf",
        "name": "PDF Document",
        "description": "PDF Document",
        "mimeType": "application/pdf",
        "role": "Editor"
      }
    ],
    "mac": {
-      "category": "public.app-category.productivity"
+      "category": "public.app-category.productivity",
      "identity": null
    },
    "win": {
      "target": [
@@ -110,7 +159,7 @@
      "displayLanguageSelector": true,
      "createDesktopShortcut": true,
      "createStartMenuShortcut": true,
-      "shortcutName": "PanConverter",
+      "shortcutName": "MarkdownConverter",
      "runAfterFinish": true,
      "menuCategory": "Productivity",
      "license": "LICENSE",
@@ -123,16 +172,29 @@
      "target": [
        "deb",
        "AppImage",
-        "snap"
+        "snap",
        "rpm"
      ],
-      "category": "Utility"
+      "category": "Utility",
      "maintainer": "ConcreteInfo <amit.wh@gmail.com>"
    },
    "deb": {
      "depends": [
-        "pandoc"
+        "pandoc",
        "ffmpeg",
        "imagemagick",
        "libreoffice-common"
      ],
-      "description": "Markdown editor and converter using Pandoc",
+      "description": "Professional Markdown editor and universal file converter",
-      "maintainer": "Amit Haridas <amit.wh@gmail.com>"
+      "maintainer": "ConcreteInfo <amit.wh@gmail.com>"
    },
    "rpm": {
      "depends": [
        "pandoc",
        "ffmpeg",
        "ImageMagick",
        "libreoffice-core"
      ]
    }
  }
 }
@@ -1,43 +1,82 @@
 /**
 * Icon Generator for MarkdownConverter
 * Generates all required icon sizes from NewIcon.jpg
 */
 const sharp = require('sharp');
 const fs = require('fs');
 const path = require('path');
-const sizes = {
+// Source image
-    'icon.png': 512,
+const sourceImage = path.join(__dirname, '..', 'assets', 'docico1.png');
-    'icon@2x.png': 1024,
+const assetsDir = path.join(__dirname, '..', 'assets');
    'icon.ico': 256,
    'icon.icns': 512
 };
-const svgPath = path.join(__dirname, '..', 'assets', 'icon.svg');
+// Icon sizes needed for different platforms
-const svgBuffer = fs.readFileSync(svgPath);
+const iconSizes = [16, 24, 32, 48, 64, 128, 256, 512, 1024];
 async function generateIcons() {
-    for (const [filename, size] of Object.entries(sizes)) {
+  console.log('Generating icons from docico1.png...');
-        const outputPath = path.join(__dirname, '..', 'assets', filename);
+
-        
+  // Check if source exists
-        if (filename.endsWith('.png')) {
+  if (!fs.existsSync(sourceImage)) {
-            await sharp(svgBuffer)
+    console.error('Source image not found:', sourceImage);
-                .resize(size, size)
+    process.exit(1);
-                .png()
+  }
-                .toFile(outputPath);
+
-            console.log(`Generated ${filename}`);
+  try {
-        } else if (filename.endsWith('.ico')) {
+    // Generate main icon.png (512x512)
-            // For ICO, we'll just use the PNG version
+    await sharp(sourceImage)
-            await sharp(svgBuffer)
+      .resize(512, 512, { fit: 'contain', background: { r: 255, g: 255, b: 255, alpha: 0 } })
-                .resize(size, size)
+      .png()
-                .png()
+      .toFile(path.join(assetsDir, 'icon.png'));
-                .toFile(outputPath.replace('.ico', '.png'));
+    console.log('Generated icon.png (512x512)');
-            console.log(`Generated ${filename.replace('.ico', '.png')} (use png2ico to convert)`);
+
-        } else if (filename.endsWith('.icns')) {
+    // Generate icon@2x.png (1024x1024)
-            // For ICNS, we'll just use the PNG version
+    await sharp(sourceImage)
-            await sharp(svgBuffer)
+      .resize(1024, 1024, { fit: 'contain', background: { r: 255, g: 255, b: 255, alpha: 0 } })
-                .resize(size, size)
+      .png()
-                .png()
+      .toFile(path.join(assetsDir, 'icon@2x.png'));
-                .toFile(outputPath.replace('.icns', '.png'));
+    console.log('Generated icon@2x.png (1024x1024)');
-            console.log(`Generated ${filename.replace('.icns', '.png')} (use png2icns to convert)`);
+
-        }
+    // Create icons directory for multi-size icons
    const iconsDir = path.join(assetsDir, 'icons');
    if (!fs.existsSync(iconsDir)) {
      fs.mkdirSync(iconsDir, { recursive: true });
    }
    // Generate all sizes
    for (const size of iconSizes) {
      await sharp(sourceImage)
        .resize(size, size, { fit: 'contain', background: { r: 255, g: 255, b: 255, alpha: 0 } })
        .png()
        .toFile(path.join(iconsDir, `${size}x${size}.png`));
      console.log(`Generated icons/${size}x${size}.png`);
    }
    // Generate favicon
    await sharp(sourceImage)
      .resize(32, 32, { fit: 'contain', background: { r: 255, g: 255, b: 255, alpha: 0 } })
      .png()
      .toFile(path.join(assetsDir, 'favicon.png'));
    console.log('Generated favicon.png (32x32)');
    // Generate tray icon (smaller, for system tray)
    await sharp(sourceImage)
      .resize(24, 24, { fit: 'contain', background: { r: 255, g: 255, b: 255, alpha: 0 } })
      .png()
      .toFile(path.join(assetsDir, 'tray-icon.png'));
    console.log('Generated tray-icon.png (24x24)');
    console.log('\nIcon generation complete!');
    console.log('\nFor Windows .ico file, use an online converter or:');
    console.log('  magick convert assets/icons/*.png assets/icon.ico');
    console.log('\nFor macOS .icns file, use:');
    console.log('  iconutil -c icns assets/icon.iconset -o assets/icon.icns');
  } catch (error) {
    console.error('Error generating icons:', error);
    process.exit(1);
  }
 }
-generateIcons().catch(console.error);
+generateIcons();
@@ -0,0 +1,601 @@
 <!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>
@@ -0,0 +1,109 @@
 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 };
@@ -0,0 +1,123 @@
 // CodeMirror 6 wrapper module
 // Provides createEditor() and getLanguageExtension() for the rest of the app.
 const {
  EditorView,
  keymap,
  lineNumbers,
  highlightActiveLine,
  drawSelection,
 } = require('@codemirror/view');
 const { EditorState } = require('@codemirror/state');
 const { markdown, markdownLanguage } = require('@codemirror/lang-markdown');
 // Language extensions loaded lazily on first use
 let _javascript, _html, _css, _json, _python;
 const {
  defaultKeymap,
  history,
  historyKeymap,
  indentWithTab,
 } = require('@codemirror/commands');
 const {
  searchKeymap,
  highlightSelectionMatches,
 } = require('@codemirror/search');
 const {
  autocompletion,
  completionKeymap,
 } = require('@codemirror/autocomplete');
 const {
  bracketMatching,
  foldGutter,
  indentOnInput,
 } = require('@codemirror/language');
 const { oneDark } = require('@codemirror/theme-one-dark');
 /**
 * Create a CodeMirror 6 editor instance.
 *
 * @param {HTMLElement} parentElement - DOM element to mount the editor in
 * @param {Object}  options
 * @param {string}  options.content          - initial document content (default '')
 * @param {Function} options.onChange        - called with new content string on every doc change
 * @param {Function} options.onUpdate       - called with the EditorView on every update (selection, doc change, etc.)
 * @param {boolean} options.isDark           - apply oneDark theme when true (default false)
 * @param {boolean} options.showLineNumbers  - show line-number gutter (default true)
 * @returns {EditorView} the created editor view
 */
 function createEditor(parentElement, options = {}) {
  const {
    content = '',
    onChange = () => {},
    onUpdate = null,
    isDark = false,
    showLineNumbers = true,
  } = options;
  const extensions = [
    markdown({ base: markdownLanguage }),
    history(),
    drawSelection(),
    highlightActiveLine(),
    bracketMatching(),
    indentOnInput(),
    highlightSelectionMatches(),
    autocompletion(),
    foldGutter(),
    keymap.of([
      ...defaultKeymap,
      ...historyKeymap,
      ...searchKeymap,
      ...completionKeymap,
      indentWithTab,
    ]),
    EditorView.updateListener.of((update) => {
      if (update.docChanged) {
        onChange(update.state.doc.toString());
      }
      if (onUpdate && (update.docChanged || update.selectionSet)) {
        onUpdate(update.view);
      }
    }),
    EditorView.lineWrapping,
  ];
  if (showLineNumbers) {
    extensions.push(lineNumbers());
  }
  if (isDark) {
    extensions.push(oneDark);
  }
  const state = EditorState.create({ doc: content, extensions });
  const view = new EditorView({ state, parent: parentElement });
  return view;
 }
 /**
 * Return the appropriate CodeMirror language extension for a given language name.
 *
 * Supported values: javascript, js, html, css, json, python, py, markdown.
 * Falls back to markdown when the language is unrecognised.
 *
 * @param {string} lang - language identifier
 * @returns {Extension} CodeMirror language extension
 */
 function getLanguageExtension(lang) {
  const loaders = {
    javascript: () => { if (!_javascript) _javascript = require('@codemirror/lang-javascript').javascript; return _javascript(); },
    html: () => { if (!_html) _html = require('@codemirror/lang-html').html; return _html(); },
    css: () => { if (!_css) _css = require('@codemirror/lang-css').css; return _css(); },
    json: () => { if (!_json) _json = require('@codemirror/lang-json').json; return _json(); },
    python: () => { if (!_python) _python = require('@codemirror/lang-python').python; return _python(); },
    markdown: () => markdown({ base: markdownLanguage }),
  };
  loaders.js = loaders.javascript;
  loaders.py = loaders.python;
  const loader = loaders[lang];
  return loader ? loader() : markdown({ base: markdownLanguage });
 }
 module.exports = { createEditor, getLanguageExtension };
@@ -0,0 +1,75 @@
 /* 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');
 }
@@ -0,0 +1,422 @@
 /**
 * Preload Script for PanConverter
 *
 * This script creates a secure bridge between the main process and renderer process.
 * It exposes only specific IPC channels, preventing direct Node.js access in the renderer.
 *
 * Security Benefits:
 * - No direct access to Node.js APIs (fs, path, child_process, etc.)
 * - All IPC channels are explicitly whitelisted
 * - Prevents XSS from escalating to full system access
 *
 * @version 4.0.0
 */
 const { contextBridge, ipcRenderer } = require('electron');
 // Define allowed IPC channels for security
 const ALLOWED_SEND_CHANNELS = [
  // File operations
  'save-file',
  'save-current-file',
  'set-current-file',
  'save-recent-files',
  'clear-recent-files',
  'renderer-ready',
  // Theme
  'get-theme',
  // Print
  'do-print',
  'do-print-with-options',
  // Export
  'export-with-options',
  'export-spreadsheet',
  // Batch conversion
  'batch-convert',
  'select-folder',
  // Universal converter
  'universal-convert',
  'universal-convert-batch',
  // Image converter
  'image-convert',
  'image-batch-convert',
  'image-resize',
  'image-compress',
  'image-rotate',
  // Audio converter
  'audio-convert',
  'audio-batch-convert',
  'audio-extract',
  'audio-trim',
  'audio-merge',
  // Video converter
  'video-convert',
  'video-batch-convert',
  'video-compress',
  'video-trim',
  'video-frames',
  'video-gif',
  // Header/Footer
  'get-header-footer-settings',
  'save-header-footer-settings',
  'browse-header-footer-logo',
  'save-header-footer-logo',
  'clear-header-footer-logo',
  // Page settings
  'get-page-settings',
  'update-page-settings',
  // Template settings
  'set-custom-start-page',
  // PDF operations
  'process-pdf-operation',
  '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',
  // Image paste/drop
  'save-pasted-image',
  // Templates
  'load-template',
  // File Explorer
  'list-directory',
  // Git
  'git-status',
  'git-stage',
  'git-commit',
  'git-log',
  // Snippets
  'get-snippets',
  'save-snippet',
  'delete-snippet',
  // Code execution (REPL)
  'execute-code',
  // File open by path
  'open-file-path',
  // PDF editor from toolbar
  'show-pdf-editor-from-toolbar',
  // Menu triggers
  'menu-open',
  'export',
  // Git diff
  'git-diff'
 ];
 const ALLOWED_RECEIVE_CHANNELS = [
  // File operations
  'file-new',
  'file-opened',
  'file-save',
  'get-content-for-save',
  'get-content-for-spreadsheet',
  'recent-files-cleared',
  // UI toggles
  'toggle-preview',
  'toggle-find',
  // Theme
  'theme-changed',
  'theme-data',
  // Edit operations
  'undo',
  'redo',
  // 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
  'show-image-converter',
  'show-audio-converter',
  'show-video-converter',
  // PDF viewer
  'open-pdf-viewer',
  // Conversion status
  'conversion-status',
  'conversion-complete',
  'batch-progress',
  'image-conversion-complete',
  'audio-conversion-complete',
  'video-conversion-complete',
  // Folder selection
  'folder-selected',
  'pdf-folder-selected',
  // Header/Footer
  'header-footer-settings-data',
  'header-footer-logo-selected',
  'header-footer-logo-saved',
  // Page settings
  'page-settings-data',
  // PDF operations
  'pdf-page-count',
  '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',
  'header-footer-logo-cleared',
  // PDF operation progress
  'pdf-operation-progress',
  // Insert content from generator windows
  'insert-content',
  // Batch converter
  'show-batch-converter',
  // v4 menu-triggered events
  'load-template-menu',
  'toggle-command-palette',
  'toggle-sidebar-panel',
  'toggle-bottom-panel'
 ];
 /**
 * Secure API exposed to renderer process
 * Access via window.electronAPI in renderer
 */
 contextBridge.exposeInMainWorld('electronAPI', {
  // ============================================
  // SEND METHODS (Renderer -> Main)
  // ============================================
  /**
   * Send a message to the main process
   * @param {string} channel - IPC channel name
   * @param {any} data - Data to send
   */
  send: (channel, data) => {
    if (ALLOWED_SEND_CHANNELS.includes(channel)) {
      ipcRenderer.send(channel, data);
    } else {
      console.warn(`[Preload] Blocked send to unauthorized channel: ${channel}`);
    }
  },
  /**
   * Invoke a main process handler and get a response
   * @param {string} channel - IPC channel name
   * @param {any} data - Data to send
   * @returns {Promise<any>} Response from main process
   */
  invoke: async (channel, data) => {
    if (ALLOWED_SEND_CHANNELS.includes(channel)) {
      return await ipcRenderer.invoke(channel, data);
    } else {
      console.warn(`[Preload] Blocked invoke to unauthorized channel: ${channel}`);
      return null;
    }
  },
  // ============================================
  // RECEIVE METHODS (Main -> Renderer)
  // ============================================
  /**
   * Register a listener for messages from main process
   * @param {string} channel - IPC channel name
   * @param {Function} callback - Function to call with received data
   * @returns {Function} Cleanup function to remove listener
   */
  on: (channel, callback) => {
    if (ALLOWED_RECEIVE_CHANNELS.includes(channel)) {
      const subscription = (event, ...args) => callback(...args);
      ipcRenderer.on(channel, subscription);
      // Return cleanup function
      return () => {
        ipcRenderer.removeListener(channel, subscription);
      };
    } else {
      console.warn(`[Preload] Blocked listener for unauthorized channel: ${channel}`);
      return () => {}; // No-op cleanup
    }
  },
  /**
   * Register a one-time listener for messages from main process
   * @param {string} channel - IPC channel name
   * @param {Function} callback - Function to call with received data
   */
  once: (channel, callback) => {
    if (ALLOWED_RECEIVE_CHANNELS.includes(channel)) {
      ipcRenderer.once(channel, (event, ...args) => callback(...args));
    } else {
      console.warn(`[Preload] Blocked once listener for unauthorized channel: ${channel}`);
    }
  },
  /**
   * Remove all listeners for a channel
   * @param {string} channel - IPC channel name
   */
  removeAllListeners: (channel) => {
    if (ALLOWED_RECEIVE_CHANNELS.includes(channel)) {
      ipcRenderer.removeAllListeners(channel);
    }
  },
  // ============================================
  // CONVENIENCE METHODS
  // ============================================
  // File Operations
  file: {
    save: (filePath, content) => ipcRenderer.send('save-file', { path: filePath, content }),
    saveCurrent: (content) => ipcRenderer.send('save-current-file', content),
    setCurrent: (filePath) => ipcRenderer.send('set-current-file', filePath),
    saveRecent: (recentFiles) => ipcRenderer.send('save-recent-files', recentFiles),
    clearRecent: () => ipcRenderer.send('clear-recent-files'),
    rendererReady: () => ipcRenderer.send('renderer-ready')
  },
  // Theme Operations
  theme: {
    get: () => ipcRenderer.send('get-theme')
  },
  // Print Operations
  print: {
    doPrint: (options) => ipcRenderer.send('do-print', options)
  },
  // Export Operations
  export: {
    withOptions: (format, options) => ipcRenderer.send('export-with-options', { format, options }),
    spreadsheet: (content, format) => ipcRenderer.send('export-spreadsheet', { content, format })
  },
  // Batch Conversion
  batch: {
    convert: (inputFolder, outputFolder, format, options) => {
      ipcRenderer.send('batch-convert', { inputFolder, outputFolder, format, options });
    },
    selectFolder: (type) => ipcRenderer.send('select-folder', type)
  },
  // Universal Converter
  converter: {
    convert: (tool, fromFormat, toFormat, filePath) => {
      ipcRenderer.send('universal-convert', { tool, fromFormat, toFormat, filePath });
    },
    convertBatch: (tool, fromFormat, toFormat, inputFolder, outputFolder) => {
      ipcRenderer.send('universal-convert-batch', { tool, fromFormat, toFormat, inputFolder, outputFolder });
    }
  },
  // Header/Footer Operations
  headerFooter: {
    getSettings: () => ipcRenderer.send('get-header-footer-settings'),
    saveSettings: (settings) => ipcRenderer.send('save-header-footer-settings', settings),
    browseLogo: (position) => ipcRenderer.send('browse-header-footer-logo', position),
    saveLogo: (position, filePath) => ipcRenderer.send('save-header-footer-logo', { position, filePath }),
    clearLogo: (position) => ipcRenderer.send('clear-header-footer-logo', position)
  },
  // Page Settings
  page: {
    getSettings: () => ipcRenderer.send('get-page-settings'),
    updateSettings: (settings) => ipcRenderer.send('update-page-settings', settings),
    setCustomStartPage: (pageNumber) => ipcRenderer.send('set-custom-start-page', pageNumber)
  },
  // PDF Operations
  pdf: {
    processOperation: (data) => ipcRenderer.send('process-pdf-operation', data),
    getPageCount: (filePath) => ipcRenderer.send('get-pdf-page-count', filePath),
    selectFolder: (inputId) => ipcRenderer.send('select-pdf-folder', inputId)
  },
  // Image Converter Operations
  image: {
    convert: (data) => ipcRenderer.send('image-convert', data),
    batchConvert: (data) => ipcRenderer.send('image-batch-convert', data),
    resize: (data) => ipcRenderer.send('image-resize', data),
    compress: (data) => ipcRenderer.send('image-compress', data),
    rotate: (data) => ipcRenderer.send('image-rotate', data)
  },
  // Audio Converter Operations
  audio: {
    convert: (data) => ipcRenderer.send('audio-convert', data),
    batchConvert: (data) => ipcRenderer.send('audio-batch-convert', data),
    extract: (data) => ipcRenderer.send('audio-extract', data),
    trim: (data) => ipcRenderer.send('audio-trim', data),
    merge: (data) => ipcRenderer.send('audio-merge', data)
  },
  // Video Converter Operations
  video: {
    convert: (data) => ipcRenderer.send('video-convert', data),
    batchConvert: (data) => ipcRenderer.send('video-batch-convert', data),
    compress: (data) => ipcRenderer.send('video-compress', data),
    trim: (data) => ipcRenderer.send('video-trim', data),
    extractFrames: (data) => ipcRenderer.send('video-frames', data),
    toGif: (data) => ipcRenderer.send('video-gif', data)
  },
  // Generator Windows
  generators: {
    openAscii: () => ipcRenderer.send('open-ascii-generator'),
    openTable: () => ipcRenderer.send('open-table-generator')
  }
 });
 // Log successful preload initialization
 console.log('[Preload] Secure IPC bridge initialized');
 console.log('[Preload] Allowed send channels:', ALLOWED_SEND_CHANNELS.length);
 console.log('[Preload] Allowed receive channels:', ALLOWED_RECEIVE_CHANNELS.length);
@@ -0,0 +1,139 @@
 class PrintPreview {
    constructor() {
        this.overlay = document.getElementById('print-preview-overlay');
        this._lastContent = '';
        this.setupEventListeners();
    }
    open(htmlContent) {
        this._lastContent = htmlContent;
        this.overlay.classList.remove('hidden');
        this.updatePreview(htmlContent);
        this.updateScaleLabel();
    }
    close() {
        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');
            }
        });
        // Close on overlay click
        this.overlay?.addEventListener('click', (e) => {
            if (e.target === this.overlay) this.close();
        });
        // Close on Escape
        document.addEventListener('keydown', (e) => {
            if (e.key === 'Escape' && !this.overlay.classList.contains('hidden')) {
                this.close();
            }
        });
    }
    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 };
@@ -0,0 +1,49 @@
 class ReplPanel {
    constructor() {
        this.panel = document.getElementById('bottom-panel');
        this.output = document.getElementById('repl-output');
        this.setupEventListeners();
    }
    setupEventListeners() {
        document.getElementById('bottom-panel-toggle')?.addEventListener('click', () => this.toggle());
        document.getElementById('repl-clear')?.addEventListener('click', () => this.clear());
    }
    toggle() {
        this.panel.classList.toggle('collapsed');
        const btn = document.getElementById('bottom-panel-toggle');
        if (btn) btn.textContent = this.panel.classList.contains('collapsed') ? '\u25BC' : '\u25B2';
    }
    show() {
        this.panel.classList.remove('collapsed');
        const btn = document.getElementById('bottom-panel-toggle');
        if (btn) btn.textContent = '\u25B2';
    }
    clear() {
        if (this.output) this.output.innerHTML = '';
    }
    appendOutput(command, result) {
        const entry = document.createElement('div');
        entry.className = 'repl-entry';
        entry.innerHTML = `
            <div class="repl-command">\u25B6 ${command}</div>
            ${result.stdout ? `<div class="repl-stdout">${this.escapeHtml(result.stdout)}</div>` : ''}
            ${result.stderr ? `<div class="repl-stderr">${this.escapeHtml(result.stderr)}</div>` : ''}
            ${result.error ? `<div class="repl-error">Error: ${this.escapeHtml(result.error)}</div>` : ''}
        `;
        this.output?.appendChild(entry);
        this.output?.scrollTo(0, this.output.scrollHeight);
    }
    escapeHtml(text) {
        const div = document.createElement('div');
        div.textContent = text;
        return div.innerHTML;
    }
 }
 module.exports = { ReplPanel };
@@ -0,0 +1,70 @@
 const path = require('path');
 function renderExplorerPanel(container, { listDirectory, onFileOpen, currentDir }) {
    container.innerHTML = `
        <div class="explorer-panel">
            <div class="explorer-toolbar">
                <input type="text" class="explorer-path" id="explorer-path" value="${currentDir || ''}" placeholder="Open a folder..." readonly>
                <button class="explorer-browse-btn" id="explorer-browse" title="Browse folder">&#x1F4C2;</button>
            </div>
            <div class="explorer-tree" id="explorer-tree"></div>
        </div>
    `;
    document.getElementById('explorer-browse')?.addEventListener('click', async () => {
        const dir = await listDirectory(null); // null means open folder dialog
        if (dir) {
            document.getElementById('explorer-path').value = dir.path;
            renderTree(document.getElementById('explorer-tree'), dir.entries, listDirectory, onFileOpen, dir.path);
        }
    });
    if (currentDir) {
        listDirectory(currentDir).then(dir => {
            if (dir) renderTree(document.getElementById('explorer-tree'), dir.entries, listDirectory, onFileOpen, currentDir);
        });
    }
 }
 function renderTree(container, entries, listDirectory, onFileOpen, basePath) {
    container.innerHTML = entries.map(entry => {
        if (entry.isDirectory) {
            return `<div class="tree-item tree-folder collapsed" data-path="${entry.path}">
                <span class="tree-icon">&#x25B6;</span>
                <span class="tree-name">${entry.name}</span>
                <div class="tree-children"></div>
            </div>`;
        }
        return `<div class="tree-item tree-file" data-path="${entry.path}">
            <span class="tree-icon">${getFileIcon(entry.name)}</span>
            <span class="tree-name">${entry.name}</span>
        </div>`;
    }).join('');
    container.querySelectorAll('.tree-folder').forEach(el => {
        el.querySelector('.tree-name').addEventListener('click', async () => {
            const isCollapsed = el.classList.contains('collapsed');
            if (isCollapsed) {
                const dir = await listDirectory(el.dataset.path);
                if (dir) {
                    const childContainer = el.querySelector('.tree-children');
                    renderTree(childContainer, dir.entries, listDirectory, onFileOpen, el.dataset.path);
                }
            }
            el.classList.toggle('collapsed');
            el.querySelector('.tree-icon').textContent = el.classList.contains('collapsed') ? '\u25B6' : '\u25BC';
        });
    });
    container.querySelectorAll('.tree-file').forEach(el => {
        el.addEventListener('click', () => onFileOpen(el.dataset.path));
    });
 }
 function getFileIcon(filename) {
    const ext = filename.split('.').pop().toLowerCase();
    const icons = { md: '\u{1F4DD}', js: '\u{1F4DC}', json: '{}', html: '\u{1F310}', css: '\u{1F3A8}', py: '\u{1F40D}', pdf: '\u{1F4D5}', txt: '\u{1F4C4}' };
    return icons[ext] || '\u{1F4C4}';
 }
 module.exports = { renderExplorerPanel };
@@ -0,0 +1,84 @@
 function renderGitPanel(container, { gitStatus, gitDiff, gitStage, gitCommit, gitLog }) {
    container.innerHTML = `
        <div class="git-panel">
            <div class="git-section">
                <h4 class="git-section-title">Changes</h4>
                <div class="git-changes" id="git-changes">
                    <p class="git-loading">Loading...</p>
                </div>
            </div>
            <div class="git-section">
                <h4 class="git-section-title">Commit</h4>
                <textarea class="git-commit-input" id="git-commit-msg" placeholder="Commit message..." rows="3"></textarea>
                <button class="git-commit-btn" id="git-commit-btn">Commit</button>
            </div>
            <div class="git-section">
                <h4 class="git-section-title">Recent Commits</h4>
                <div class="git-log" id="git-log"></div>
            </div>
        </div>
    `;
    loadGitStatus();
    async function loadGitStatus() {
        const status = await gitStatus();
        const changesEl = document.getElementById('git-changes');
        if (!status || !changesEl) return;
        if (status.error) {
            changesEl.innerHTML = `<p class="git-info">${status.error}</p>`;
            return;
        }
        const files = [
            ...status.modified.map(f => ({ file: f, status: 'M', color: '#f59e0b' })),
            ...status.not_added.map(f => ({ file: f, status: '?', color: '#6b7280' })),
            ...status.created.map(f => ({ file: f, status: 'A', color: '#10b981' })),
            ...status.deleted.map(f => ({ file: f, status: 'D', color: '#ef4444' })),
            ...status.staged.map(f => ({ file: f, status: 'S', color: '#3b82f6' })),
        ];
        if (files.length === 0) {
            changesEl.innerHTML = '<p class="git-info">No changes</p>';
        } else {
            changesEl.innerHTML = files.map(f => `
                <div class="git-file" data-file="${f.file}">
                    <span class="git-file-status" style="color:${f.color}">${f.status}</span>
                    <span class="git-file-name">${f.file}</span>
                    <button class="git-stage-btn" data-file="${f.file}" title="Stage file">+</button>
                </div>
            `).join('');
            changesEl.querySelectorAll('.git-stage-btn').forEach(btn => {
                btn.addEventListener('click', async (e) => {
                    e.stopPropagation();
                    await gitStage([btn.dataset.file]);
                    loadGitStatus();
                });
            });
        }
        // Load log
        const log = await gitLog();
        const logEl = document.getElementById('git-log');
        if (log && logEl) {
            logEl.innerHTML = (log.all || []).slice(0, 10).map(entry => `
                <div class="git-log-entry">
                    <div class="git-log-msg">${entry.message}</div>
                    <div class="git-log-meta">${entry.date?.substring(0, 10) || ''} &middot; ${entry.author_name || ''}</div>
                </div>
            `).join('') || '<p class="git-info">No commits</p>';
        }
    }
    document.getElementById('git-commit-btn')?.addEventListener('click', async () => {
        const msg = document.getElementById('git-commit-msg')?.value?.trim();
        if (!msg) return;
        await gitCommit(msg);
        document.getElementById('git-commit-msg').value = '';
        loadGitStatus();
    });
 }
 module.exports = { renderGitPanel };
@@ -0,0 +1,50 @@
 class SidebarManager {
    constructor() {
        this.sidebar = document.getElementById('sidebar');
        this.panelContent = document.getElementById('sidebar-panel-content');
        this.panelTitle = document.querySelector('.sidebar-panel-title');
        this.activePanel = null;
        this.panels = new Map();
        this.setupEventListeners();
    }
    setupEventListeners() {
        document.querySelectorAll('.sidebar-icon').forEach(btn => {
            btn.addEventListener('click', () => this.togglePanel(btn.dataset.panel));
        });
        document.querySelector('.sidebar-panel-close')?.addEventListener('click', () => this.collapse());
    }
    registerPanel(name, { title, render }) {
        this.panels.set(name, { title, render });
    }
    togglePanel(name) {
        if (this.activePanel === name) {
            this.collapse();
        } else {
            this.expand(name);
        }
    }
    expand(name) {
        const panel = this.panels.get(name);
        if (!panel) return;
        this.sidebar.classList.remove('collapsed');
        this.panelTitle.textContent = panel.title;
        this.panelContent.innerHTML = '';
        panel.render(this.panelContent);
        this.activePanel = name;
        document.querySelectorAll('.sidebar-icon').forEach(btn => {
            btn.classList.toggle('active', btn.dataset.panel === name);
        });
    }
    collapse() {
        this.sidebar.classList.add('collapsed');
        this.activePanel = null;
        document.querySelectorAll('.sidebar-icon').forEach(btn => btn.classList.remove('active'));
    }
 }
 module.exports = { SidebarManager };
@@ -0,0 +1,71 @@
 function renderSnippetsPanel(container, { getSnippets, saveSnippet, deleteSnippet, onInsert }) {
    container.innerHTML = `
        <div class="snippets-panel">
            <div class="snippets-toolbar">
                <input type="text" class="snippets-search" id="snippets-search" placeholder="Search snippets...">
                <button class="snippets-add-btn" id="snippets-add" title="Add snippet">+</button>
            </div>
            <div class="snippets-list" id="snippets-list"></div>
        </div>
    `;
    let snippets = [];
    async function loadSnippets() {
        snippets = await getSnippets() || [];
        renderList(document.getElementById('snippets-search')?.value || '');
    }
    function renderList(query) {
        const list = document.getElementById('snippets-list');
        if (!list) return;
        const filtered = query
            ? snippets.filter(s => s.name.toLowerCase().includes(query.toLowerCase()) || (s.language || '').toLowerCase().includes(query.toLowerCase()))
            : snippets;
        list.innerHTML = filtered.length ? filtered.map(s => `
            <div class="snippet-item" data-id="${s.id}">
                <div class="snippet-header">
                    <span class="snippet-name">${s.name}</span>
                    <span class="snippet-lang">${s.language || 'text'}</span>
                </div>
                <pre class="snippet-preview"><code>${(s.code || '').substring(0, 100)}${(s.code || '').length > 100 ? '...' : ''}</code></pre>
                <div class="snippet-actions">
                    <button class="snippet-insert" data-id="${s.id}" title="Insert">Insert</button>
                    <button class="snippet-delete" data-id="${s.id}" title="Delete">&times;</button>
                </div>
            </div>
        `).join('') : '<p class="git-info">No snippets yet. Click + to add one.</p>';
        list.querySelectorAll('.snippet-insert').forEach(btn => {
            btn.addEventListener('click', () => {
                const s = snippets.find(sn => sn.id === btn.dataset.id);
                if (s) onInsert(s.code);
            });
        });
        list.querySelectorAll('.snippet-delete').forEach(btn => {
            btn.addEventListener('click', async () => {
                await deleteSnippet(btn.dataset.id);
                loadSnippets();
            });
        });
    }
    document.getElementById('snippets-search')?.addEventListener('input', (e) => renderList(e.target.value));
    document.getElementById('snippets-add')?.addEventListener('click', () => {
        const name = prompt('Snippet name:');
        if (!name) return;
        const language = prompt('Language (e.g., javascript, python, html):') || 'text';
        const code = prompt('Paste your code snippet:');
        if (!code) return;
        saveSnippet({ id: Date.now().toString(), name, language, code }).then(() => loadSnippets());
    });
    loadSnippets();
 }
 module.exports = { renderSnippetsPanel };
@@ -0,0 +1,34 @@
 const fs = require('fs');
 const path = require('path');
 const templates = [
    { name: 'Blog Post', file: 'blog-post.md', description: 'Article with frontmatter' },
    { name: 'Meeting Notes', file: 'meeting-notes.md', description: 'Agenda, notes, action items' },
    { name: 'Technical Spec', file: 'technical-spec.md', description: 'Requirements and architecture' },
    { name: 'Changelog', file: 'changelog.md', description: 'Keep a Changelog format' },
    { name: 'README', file: 'readme.md', description: 'Project documentation' },
    { name: 'Project Plan', file: 'project-plan.md', description: 'Goals, milestones, timeline' },
    { name: 'API Docs', file: 'api-docs.md', description: 'API endpoint documentation' },
    { name: 'Tutorial', file: 'tutorial.md', description: 'Step-by-step guide' },
    { name: 'Release Notes', file: 'release-notes.md', description: 'Version release summary' },
    { name: 'Comparison', file: 'comparison.md', description: 'Feature comparison table' },
 ];
 function renderTemplatesPanel(container, onSelect) {
    container.innerHTML = `
        <div class="panel-list">
            ${templates.map(t => `
                <div class="panel-list-item template-item" data-file="${t.file}">
                    <div class="panel-list-item-title">${t.name}</div>
                    <div class="panel-list-item-desc">${t.description}</div>
                </div>
            `).join('')}
        </div>
    `;
    container.querySelectorAll('.template-item').forEach(el => {
        el.addEventListener('click', () => onSelect(el.dataset.file));
    });
 }
 module.exports = { renderTemplatesPanel, templates };
@@ -0,0 +1,969 @@
 /**
 * ConcreteInfo Theme for MarkdownConverter
 * Based on logo palette: #464646, #9a9696, #e5461f, #e3e3e3, #0d0b09
 * Version: 3.0.0
 */
 /* ============================================
   CSS Variables - ConcreteInfo Theme
   ============================================ */
 :root {
  /* Primary Colors from Logo Palette */
  --ci-dark-gray: #464646;
  --ci-medium-gray: #9a9696;
  --ci-accent: #e5461f;
  --ci-light-gray: #e3e3e3;
  --ci-black: #0d0b09;
  /* Extended Palette */
  --ci-accent-hover: #c93a18;
  --ci-accent-light: rgba(229, 70, 31, 0.1);
  --ci-white: #ffffff;
  --ci-bg: #f5f5f5;
  --ci-border: #d0d0d0;
  /* Semantic Colors */
  --ci-success: #28a745;
  --ci-warning: #ffc107;
  --ci-danger: #dc3545;
  --ci-info: #17a2b8;
  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
 }
 /* ============================================
   ConcreteInfo Theme Application
   ============================================ */
 body.theme-concreteinfo {
  background: var(--ci-bg);
  color: var(--ci-dark-gray);
 }
 body.theme-concreteinfo .toolbar {
  background: linear-gradient(135deg, var(--ci-dark-gray) 0%, var(--ci-black) 100%);
  border-bottom: 3px solid var(--ci-accent);
 }
 body.theme-concreteinfo .toolbar button {
  color: var(--ci-white);
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
 }
 body.theme-concreteinfo .toolbar button:hover {
  background: var(--ci-accent);
  border-color: var(--ci-accent);
  transform: translateY(-1px);
 }
 body.theme-concreteinfo .tab-bar {
  background: var(--ci-dark-gray);
  border-bottom: 2px solid var(--ci-accent);
 }
 body.theme-concreteinfo .tab {
  background: var(--ci-medium-gray);
  color: var(--ci-white);
  border: none;
  margin: 2px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: all var(--transition-fast);
 }
 body.theme-concreteinfo .tab:hover {
  background: var(--ci-accent-light);
 }
 body.theme-concreteinfo .tab.active {
  background: var(--ci-accent);
  color: var(--ci-white);
 }
 body.theme-concreteinfo .editor-textarea {
  background: var(--ci-white);
  color: var(--ci-black);
  border: 1px solid var(--ci-border);
  font-family: var(--font-mono);
 }
 body.theme-concreteinfo .preview-content {
  background: var(--ci-white);
  color: var(--ci-dark-gray);
  border-left: 3px solid var(--ci-accent);
 }
 body.theme-concreteinfo .status-bar {
  background: var(--ci-dark-gray);
  color: var(--ci-light-gray);
  border-top: 2px solid var(--ci-accent);
 }
 /* ============================================
   Modern Modal Styles
   ============================================ */
 .modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(13, 11, 9, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
 }
 .modal-overlay.active {
  opacity: 1;
  visibility: visible;
 }
 .modal-content {
  background: var(--ci-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 90%;
  max-height: 85vh;
  overflow: hidden;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-normal);
 }
 .modal-overlay.active .modal-content {
  transform: scale(1) translateY(0);
 }
 .modal-header {
  background: linear-gradient(135deg, var(--ci-dark-gray) 0%, var(--ci-black) 100%);
  color: var(--ci-white);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 3px solid var(--ci-accent);
 }
 .modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  font-family: var(--font-sans);
 }
 .modal-close {
  background: transparent;
  border: none;
  color: var(--ci-white);
  font-size: 1.5rem;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
 }
 .modal-close:hover {
  background: var(--ci-accent);
  transform: rotate(90deg);
 }
 .modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  max-height: 60vh;
 }
 .modal-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--ci-light-gray);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  border-top: 1px solid var(--ci-border);
 }
 /* ============================================
   Button Styles
   ============================================ */
 .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
 }
 .btn-primary {
  background: var(--ci-accent);
  color: var(--ci-white);
 }
 .btn-primary:hover {
  background: var(--ci-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
 }
 .btn-secondary {
  background: var(--ci-medium-gray);
  color: var(--ci-white);
 }
 .btn-secondary:hover {
  background: var(--ci-dark-gray);
 }
 .btn-outline {
  background: transparent;
  border: 2px solid var(--ci-accent);
  color: var(--ci-accent);
 }
 .btn-outline:hover {
  background: var(--ci-accent);
  color: var(--ci-white);
 }
 .btn-ghost {
  background: transparent;
  color: var(--ci-dark-gray);
 }
 .btn-ghost:hover {
  background: var(--ci-light-gray);
 }
 /* ============================================
   Form Controls
   ============================================ */
 .form-group {
  margin-bottom: var(--spacing-md);
 }
 .form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--ci-dark-gray);
  font-size: 0.875rem;
 }
 .form-input,
 .form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  border: 2px solid var(--ci-border);
  border-radius: var(--radius-md);
  background: var(--ci-white);
  color: var(--ci-dark-gray);
  transition: all var(--transition-fast);
 }
 .form-input:focus,
 .form-select:focus {
  outline: none;
  border-color: var(--ci-accent);
  box-shadow: 0 0 0 3px var(--ci-accent-light);
 }
 .form-input::placeholder {
  color: var(--ci-medium-gray);
 }
 /* ============================================
   App Header with Logo
   ============================================ */
 .app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 16px;
  background: #ffffff;
  border-bottom: 2px solid #e1e4e8;
  min-height: 36px;
 }
 .app-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
 }
 .app-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
 }
 .app-logo {
  height: 22px;
  width: auto;
 }
 .app-title {
  color: #24292e;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
 }
 .app-version {
  color: #6a737d;
  font-size: 0.7rem;
  font-family: 'SFMono-Regular', Consolas, monospace;
 }
 /* Dark theme header adjustments */
 body.theme-dark .app-header,
 body.theme-dracula .app-header,
 body.theme-onedark .app-header,
 body.theme-tokyonight .app-header,
 body.theme-monokai .app-header,
 body.theme-cobalt2 .app-header,
 body.theme-gruvbox-dark .app-header,
 body.theme-ayu-dark .app-header,
 body.theme-ayu-mirage .app-header,
 body.theme-palenight .app-header,
 body.theme-oceanic-next .app-header,
 body.theme-nord .app-header,
 body.theme-concrete-dark .app-header {
  background: #1f2937;
  border-bottom-color: #374151;
 }
 body.theme-dark .app-title,
 body.theme-dracula .app-title,
 body.theme-onedark .app-title,
 body.theme-tokyonight .app-title,
 body.theme-monokai .app-title,
 body.theme-cobalt2 .app-title,
 body.theme-gruvbox-dark .app-title,
 body.theme-ayu-dark .app-title,
 body.theme-ayu-mirage .app-title,
 body.theme-palenight .app-title,
 body.theme-oceanic-next .app-title,
 body.theme-nord .app-title,
 body.theme-concrete-dark .app-title {
  color: #f3f4f6;
 }
 body.theme-dark .app-version,
 body.theme-dracula .app-version,
 body.theme-onedark .app-version,
 body.theme-tokyonight .app-version,
 body.theme-monokai .app-version,
 body.theme-cobalt2 .app-version,
 body.theme-gruvbox-dark .app-version,
 body.theme-ayu-dark .app-version,
 body.theme-ayu-mirage .app-version,
 body.theme-palenight .app-version,
 body.theme-oceanic-next .app-version,
 body.theme-nord .app-version,
 body.theme-concrete-dark .app-version {
  color: #9ca3af;
 }
 body.theme-dark .app-logo,
 body.theme-dracula .app-logo,
 body.theme-onedark .app-logo,
 body.theme-tokyonight .app-logo,
 body.theme-monokai .app-logo,
 body.theme-cobalt2 .app-logo,
 body.theme-gruvbox-dark .app-logo,
 body.theme-ayu-dark .app-logo,
 body.theme-ayu-mirage .app-logo,
 body.theme-palenight .app-logo,
 body.theme-oceanic-next .app-logo,
 body.theme-nord .app-logo,
 body.theme-concrete-dark .app-logo {
  filter: none;
 }
 /* ============================================
   Converter Cards
   ============================================ */
 .converter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  padding: var(--spacing-md);
 }
 .converter-card {
  background: var(--ci-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  border: 2px solid var(--ci-border);
  transition: all var(--transition-fast);
  cursor: pointer;
 }
 .converter-card:hover {
  border-color: var(--ci-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
 }
 .converter-card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
 }
 .converter-card-title {
  font-weight: 600;
  color: var(--ci-dark-gray);
  margin-bottom: var(--spacing-xs);
 }
 .converter-card-desc {
  font-size: 0.875rem;
  color: var(--ci-medium-gray);
 }
 /* ============================================
   Progress Bar
   ============================================ */
 .progress-bar {
  height: 8px;
  background: var(--ci-light-gray);
  border-radius: var(--radius-full);
  overflow: hidden;
 }
 .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--ci-accent) 0%, var(--ci-accent-hover) 100%);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
 }
 /* ============================================
   File Drop Zone
   ============================================ */
 .drop-zone {
  border: 2px dashed var(--ci-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-fast);
  cursor: pointer;
 }
 .drop-zone:hover,
 .drop-zone.drag-over {
  border-color: var(--ci-accent);
  background: var(--ci-accent-light);
 }
 .drop-zone-icon {
  font-size: 3rem;
  color: var(--ci-medium-gray);
  margin-bottom: var(--spacing-md);
 }
 .drop-zone-text {
  color: var(--ci-dark-gray);
  font-weight: 500;
 }
 .drop-zone-hint {
  color: var(--ci-medium-gray);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
 }
 /* ============================================
   Syntax Highlighting for Editor
   ============================================ */
 .editor-syntax .md-heading {
  color: var(--ci-accent);
  font-weight: bold;
 }
 .editor-syntax .md-bold {
  color: var(--ci-dark-gray);
  font-weight: bold;
 }
 .editor-syntax .md-italic {
  color: var(--ci-dark-gray);
  font-style: italic;
 }
 .editor-syntax .md-code {
  background: var(--ci-light-gray);
  color: var(--ci-accent);
  font-family: var(--font-mono);
  padding: 2px 4px;
  border-radius: var(--radius-sm);
 }
 .editor-syntax .md-link {
  color: var(--ci-info);
  text-decoration: underline;
 }
 .editor-syntax .md-list {
  color: var(--ci-accent);
 }
 .editor-syntax .md-blockquote {
  color: var(--ci-medium-gray);
  border-left: 3px solid var(--ci-accent);
  padding-left: var(--spacing-md);
 }
 /* ============================================
   ASCII Art Generator Styles
   ============================================ */
 .ascii-preview {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.2;
  background: var(--ci-black);
  color: #00ff00;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  white-space: pre;
 }
 .ascii-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
 }
 /* ============================================
   Table Generator Styles
   ============================================ */
 .table-generator-grid {
  display: grid;
  gap: 1px;
  background: var(--ci-border);
  border: 1px solid var(--ci-border);
  border-radius: var(--radius-md);
  overflow: hidden;
 }
 .table-generator-cell {
  background: var(--ci-white);
  padding: var(--spacing-sm);
  min-width: 80px;
  min-height: 32px;
 }
 .table-generator-cell input {
  width: 100%;
  border: none;
  background: transparent;
  text-align: center;
  font-family: var(--font-mono);
 }
 .table-generator-cell.header {
  background: var(--ci-light-gray);
  font-weight: 600;
 }
 /* ============================================
   PDF Viewer/Editor Styles
   ============================================ */
 .pdf-viewer {
  background: var(--ci-dark-gray);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
 }
 .pdf-page {
  background: var(--ci-white);
  box-shadow: var(--shadow-lg);
  max-width: 100%;
 }
 .pdf-toolbar {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--ci-light-gray);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
 }
 /* ============================================
   Dark Mode for ConcreteInfo Theme
   ============================================ */
 body.theme-concreteinfo-dark {
  --ci-bg: #1a1a1a;
  --ci-white: #2a2a2a;
  --ci-light-gray: #3a3a3a;
  --ci-border: #4a4a4a;
 }
 body.theme-concreteinfo-dark .editor-textarea,
 body.theme-concreteinfo-dark .preview-content {
  background: #2a2a2a;
  color: #e0e0e0;
 }
 body.theme-concreteinfo-dark .modal-content {
  background: #2a2a2a;
  color: #e0e0e0;
 }
 body.theme-concreteinfo-dark .modal-body {
  background: #2a2a2a;
 }
 body.theme-concreteinfo-dark .modal-footer {
  background: #1a1a1a;
 }
 /* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
 }
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
 }
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
 }
 .animate-fade-in {
  animation: fadeIn var(--transition-normal);
 }
 .animate-slide-up {
  animation: slideUp var(--transition-normal);
 }
 .animate-pulse {
  animation: pulse 2s infinite;
 }
 /* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  .modal-content {
    width: 95%;
    max-height: 90vh;
  }
  .converter-grid {
    grid-template-columns: 1fr;
  }
  .app-header {
    flex-wrap: wrap;
  }
 }
 /* ============================================
   Concrete Dark Theme
   ============================================ */
 body.theme-concrete-dark {
  background: #1a1a1a;
  color: #e3e3e3;
 }
 body.theme-concrete-dark .toolbar {
  background: linear-gradient(135deg, #0d0b09 0%, #1a1a1a 100%);
  border-bottom: 3px solid #e5461f;
 }
 body.theme-concrete-dark .toolbar button {
  color: #e3e3e3;
 }
 body.theme-concrete-dark .toolbar button:hover {
  background: #e5461f;
 }
 body.theme-concrete-dark .tab-bar {
  background: #0d0b09;
  border-bottom: 2px solid #e5461f;
 }
 body.theme-concrete-dark .tab {
  background: #2a2a2a;
  color: #e3e3e3;
  border-radius: 4px 4px 0 0;
 }
 body.theme-concrete-dark .tab.active {
  background: #464646;
  border-bottom: 2px solid #e5461f;
 }
 body.theme-concrete-dark .editor-textarea,
 body.theme-concrete-dark .editor-pane {
  background: #1a1a1a;
  color: #e3e3e3;
 }
 body.theme-concrete-dark .preview-content {
  background: #1a1a1a;
  color: #e3e3e3;
 }
 body.theme-concrete-dark .status-bar {
  background: #0d0b09;
  color: #9a9696;
  border-top: 1px solid #464646;
 }
 body.theme-concrete-dark .export-dialog-content,
 body.theme-concrete-dark .batch-dialog-content {
  background: #2a2a2a;
  color: #e3e3e3;
 }
 body.theme-concrete-dark .export-dialog-header,
 body.theme-concrete-dark .batch-dialog-header {
  background: #1a1a1a;
  border-bottom: 2px solid #e5461f;
 }
 body.theme-concrete-dark .export-dialog-footer,
 body.theme-concrete-dark .batch-dialog-footer {
  background: #1a1a1a;
 }
 body.theme-concrete-dark input,
 body.theme-concrete-dark select,
 body.theme-concrete-dark textarea {
  background: #1a1a1a;
  color: #e3e3e3;
  border-color: #464646;
 }
 body.theme-concrete-dark input:focus,
 body.theme-concrete-dark select:focus,
 body.theme-concrete-dark textarea:focus {
  border-color: #e5461f;
 }
 body.theme-concrete-dark .line-numbers {
  background: #0d0b09;
  color: #9a9696;
 }
 /* ============================================
   Concrete Light Theme
   ============================================ */
 body.theme-concrete-light {
  background: #f5f5f5;
  color: #464646;
 }
 body.theme-concrete-light .toolbar {
  background: #ffffff;
  border-bottom: 3px solid #e5461f;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
 }
 body.theme-concrete-light .toolbar button {
  color: #464646;
 }
 body.theme-concrete-light .toolbar button:hover {
  background: #e5461f;
  color: #ffffff;
 }
 body.theme-concrete-light .tab-bar {
  background: #ffffff;
  border-bottom: 2px solid #e3e3e3;
 }
 body.theme-concrete-light .tab {
  background: #f5f5f5;
  color: #464646;
  border-radius: 4px 4px 0 0;
 }
 body.theme-concrete-light .tab.active {
  background: #ffffff;
  border-bottom: 2px solid #e5461f;
  color: #e5461f;
 }
 body.theme-concrete-light .editor-textarea,
 body.theme-concrete-light .editor-pane {
  background: #ffffff;
  color: #464646;
 }
 body.theme-concrete-light .preview-content {
  background: #ffffff;
  color: #464646;
 }
 body.theme-concrete-light .status-bar {
  background: #ffffff;
  color: #9a9696;
  border-top: 1px solid #e3e3e3;
 }
 body.theme-concrete-light .export-dialog-content,
 body.theme-concrete-light .batch-dialog-content {
  background: #ffffff;
  color: #464646;
 }
 body.theme-concrete-light .export-dialog-header,
 body.theme-concrete-light .batch-dialog-header {
  background: #f5f5f5;
  border-bottom: 2px solid #e5461f;
 }
 body.theme-concrete-light .line-numbers {
  background: #f5f5f5;
  color: #9a9696;
 }
 /* ============================================
   Concrete Warm Theme
   ============================================ */
 body.theme-concrete-warm {
  background: #faf8f5;
  color: #464646;
 }
 body.theme-concrete-warm .toolbar {
  background: linear-gradient(135deg, #464646 0%, #5a5a5a 100%);
  border-bottom: 3px solid #e5461f;
 }
 body.theme-concrete-warm .toolbar button {
  color: #faf8f5;
 }
 body.theme-concrete-warm .toolbar button:hover {
  background: #e5461f;
 }
 body.theme-concrete-warm .tab-bar {
  background: #464646;
  border-bottom: 2px solid #e5461f;
 }
 body.theme-concrete-warm .tab {
  background: #6a6a6a;
  color: #faf8f5;
  border-radius: 4px 4px 0 0;
 }
 body.theme-concrete-warm .tab.active {
  background: #faf8f5;
  color: #e5461f;
  border-bottom: 2px solid #e5461f;
 }
 body.theme-concrete-warm .editor-textarea,
 body.theme-concrete-warm .editor-pane {
  background: #faf8f5;
  color: #464646;
 }
 body.theme-concrete-warm .preview-content {
  background: #faf8f5;
  color: #464646;
 }
 body.theme-concrete-warm .status-bar {
  background: #f0ebe4;
  color: #9a9696;
  border-top: 1px solid #e3e3e3;
 }
 body.theme-concrete-warm .export-dialog-content,
 body.theme-concrete-warm .batch-dialog-content {
  background: #faf8f5;
  color: #464646;
 }
 body.theme-concrete-warm .export-dialog-header,
 body.theme-concrete-warm .batch-dialog-header {
  background: #f0ebe4;
  border-bottom: 2px solid #e5461f;
 }
 body.theme-concrete-warm h1,
 body.theme-concrete-warm h2,
 body.theme-concrete-warm h3,
 body.theme-concrete-warm h4,
 body.theme-concrete-warm h5,
 body.theme-concrete-warm h6 {
  color: #e5461f;
 }
 body.theme-concrete-warm a {
  color: #e5461f;
 }
 body.theme-concrete-warm .line-numbers {
  background: #f0ebe4;
  color: #9a9696;
 }
@@ -0,0 +1,268 @@
 /* Sidebar */
 .main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
 }
 .sidebar {
    display: flex;
    flex-shrink: 0;
    height: 100%;
    transition: width 0.2s ease;
 }
 .sidebar.collapsed {
    width: 48px;
 }
 .sidebar:not(.collapsed) {
    width: 328px; /* 48px icons + 280px panel */
 }
 .sidebar-icons {
    display: flex;
    flex-direction: column;
    width: 48px;
    background: var(--gray-100, #f3f4f6);
    border-right: 1px solid var(--gray-200, #e5e7eb);
    padding: 8px 0;
    gap: 4px;
    align-items: center;
 }
 .sidebar-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    color: var(--gray-500, #6b7280);
    transition: all 0.15s ease;
 }
 .sidebar-icon:hover {
    background: var(--gray-200, #e5e7eb);
    color: var(--gray-700, #374151);
 }
 .sidebar-icon.active {
    background: var(--gray-200, #e5e7eb);
    color: var(--primary-dark, #5661b3);
    box-shadow: inset 3px 0 0 var(--primary-dark, #5661b3);
 }
 .sidebar-panel {
    width: 280px;
    background: var(--gray-50, #f9fafb);
    border-right: 1px solid var(--gray-200, #e5e7eb);
    display: flex;
    flex-direction: column;
    overflow: hidden;
 }
 .sidebar.collapsed .sidebar-panel {
    display: none;
 }
 .sidebar-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-200, #e5e7eb);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-600, #4b5563);
 }
 .sidebar-panel-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--gray-400, #9ca3af);
    padding: 0 4px;
    border-radius: 4px;
 }
 .sidebar-panel-close:hover {
    background: var(--gray-200, #e5e7eb);
    color: var(--gray-600, #4b5563);
 }
 .sidebar-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
 }
 /* Dark theme support */
 body[class*="dark"] .sidebar-icons,
 body[class*="dark"] .sidebar-panel {
    background: #1e1e1e;
    border-color: #333;
 }
 body[class*="dark"] .sidebar-icon {
    color: #888;
 }
 body[class*="dark"] .sidebar-icon:hover {
    background: #333;
    color: #ccc;
 }
 body[class*="dark"] .sidebar-icon.active {
    background: #333;
    color: #8b9aff;
    box-shadow: inset 3px 0 0 #8b9aff;
 }
 body[class*="dark"] .sidebar-panel-header {
    border-color: #333;
    color: #ccc;
 }
 /* Panel list items (templates, etc.) */
 .panel-list-item {
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 4px;
 }
 .panel-list-item:hover {
    background: var(--gray-200, #e5e7eb);
 }
 .panel-list-item-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-800, #1f2937);
 }
 .panel-list-item-desc {
    font-size: 11px;
    color: var(--gray-500, #6b7280);
    margin-top: 2px;
 }
 body[class*="dark"] .panel-list-item:hover {
    background: #333;
 }
 body[class*="dark"] .panel-list-item-title {
    color: #ddd;
 }
 body[class*="dark"] .panel-list-item-desc {
    color: #888;
 }
 /* Explorer Panel */
 .explorer-toolbar {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
 }
 .explorer-path {
    flex: 1;
    padding: 6px 8px;
    border: 1px solid var(--gray-300, #d1d5db);
    border-radius: 6px;
    font-size: 12px;
    background: white;
    overflow: hidden;
    text-overflow: ellipsis;
 }
 .explorer-browse-btn {
    border: 1px solid var(--gray-300, #d1d5db);
    border-radius: 6px;
    background: white;
    cursor: pointer;
    padding: 4px 8px;
 }
 .tree-item {
    padding: 3px 0;
    cursor: pointer;
    font-size: 13px;
    user-select: none;
 }
 .tree-item:hover {
    background: var(--gray-100, #f3f4f6);
    border-radius: 4px;
 }
 .tree-icon {
    margin-right: 4px;
    font-size: 12px;
 }
 .tree-children {
    padding-left: 16px;
 }
 .tree-folder.collapsed .tree-children {
    display: none;
 }
 .tree-name {
    font-size: 13px;
 }
 /* Git Panel */
 .git-section { margin-bottom: 16px; }
 .git-section-title { font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--gray-500); margin-bottom: 8px; }
 .git-file { display: flex; align-items: center; padding: 4px 6px; border-radius: 4px; font-size: 13px; gap: 6px; }
 .git-file:hover { background: var(--gray-100, #f3f4f6); }
 .git-file-status { font-weight: 700; font-family: monospace; width: 16px; text-align: center; }
 .git-file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
 .git-stage-btn { border: none; background: var(--gray-200); border-radius: 4px; cursor: pointer; font-size: 14px; width: 22px; height: 22px; }
 .git-commit-input { width: 100%; padding: 8px; border: 1px solid var(--gray-300); border-radius: 6px; font-size: 13px; font-family: inherit; resize: vertical; box-sizing: border-box; }
 .git-commit-btn { width: 100%; margin-top: 8px; padding: 8px; background: var(--primary-dark, #5661b3); color: white; border: none; border-radius: 6px; font-size: 13px; cursor: pointer; }
 .git-commit-btn:hover { opacity: 0.9; }
 .git-log-entry { padding: 6px 0; border-bottom: 1px solid var(--gray-100); }
 .git-log-msg { font-size: 13px; }
 .git-log-meta { font-size: 11px; color: var(--gray-500); margin-top: 2px; }
 .git-info { font-size: 13px; color: var(--gray-500); padding: 8px 0; }
 .git-loading { font-size: 13px; color: var(--gray-400); }
 /* Snippets Panel */
 .snippets-toolbar { display: flex; gap: 4px; margin-bottom: 8px; }
 .snippets-search { flex: 1; padding: 6px 10px; border: 1px solid var(--gray-300); border-radius: 6px; font-size: 13px; }
 .snippets-add-btn { width: 32px; border: 1px solid var(--gray-300); border-radius: 6px; background: white; font-size: 18px; cursor: pointer; }
 .snippet-item { padding: 8px; border: 1px solid var(--gray-200); border-radius: 6px; margin-bottom: 6px; }
 .snippet-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }
 .snippet-name { font-size: 13px; font-weight: 500; }
 .snippet-lang { font-size: 11px; background: var(--gray-100); padding: 2px 6px; border-radius: 4px; color: var(--gray-500); }
 .snippet-preview { font-size: 12px; background: var(--gray-50); padding: 6px; border-radius: 4px; margin: 4px 0; overflow: hidden; max-height: 60px; }
 .snippet-preview code { font-family: 'JetBrains Mono', monospace; }
 .snippet-actions { display: flex; gap: 4px; }
 .snippet-insert { font-size: 12px; padding: 4px 8px; border: 1px solid var(--gray-300); border-radius: 4px; background: white; cursor: pointer; }
 .snippet-delete { font-size: 14px; padding: 4px 8px; border: 1px solid var(--gray-300); border-radius: 4px; background: white; cursor: pointer; color: #ef4444; }
 /* Dark theme for sidebar panels */
 body[class*="dark"] .explorer-path,
 body[class*="dark"] .explorer-browse-btn,
 body[class*="dark"] .snippets-search,
 body[class*="dark"] .snippets-add-btn,
 body[class*="dark"] .snippet-insert,
 body[class*="dark"] .snippet-delete {
    background: #2d2d2d;
    border-color: #444;
    color: #ccc;
 }
 body[class*="dark"] .git-commit-input {
    background: #2d2d2d;
    border-color: #444;
    color: #ccc;
 }
 body[class*="dark"] .snippet-item {
    border-color: #444;
 }
 body[class*="dark"] .snippet-preview {
    background: #2d2d2d;
 }
 body[class*="dark"] .tree-item:hover,
 body[class*="dark"] .git-file:hover {
    background: #333;
 }
@@ -0,0 +1,24 @@
 .welcome-container { padding: 40px; max-width: 900px; margin: 0 auto; }
 .welcome-hero { text-align: center; margin-bottom: 40px; }
 .welcome-title { font-size: 32px; font-weight: 700; color: var(--gray-800, #1f2937); }
 .welcome-version { font-size: 14px; color: var(--primary-dark, #5661b3); margin-top: 4px; font-weight: 500; }
 .welcome-subtitle { font-size: 16px; color: var(--gray-500, #6b7280); margin-top: 8px; }
 .welcome-grid { display: grid; gap: 32px; }
 .welcome-section h2 { font-size: 18px; margin-bottom: 16px; color: var(--gray-700, #374151); }
 .welcome-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
 .welcome-card { padding: 20px; border: 1px solid var(--gray-200, #e5e7eb); border-radius: 12px; cursor: pointer; text-align: center; transition: all 0.2s; }
 .welcome-card:hover { border-color: var(--primary-dark, #5661b3); box-shadow: 0 4px 12px rgba(0,0,0,0.08); transform: translateY(-2px); }
 .welcome-card-icon { font-size: 28px; margin-bottom: 8px; }
 .welcome-card h3 { font-size: 15px; margin-bottom: 4px; }
 .welcome-card p { font-size: 13px; color: var(--gray-500); }
 .welcome-card kbd { display: inline-block; margin-top: 8px; padding: 2px 8px; background: var(--gray-100); border: 1px solid var(--gray-300); border-radius: 4px; font-size: 12px; font-family: 'JetBrains Mono', monospace; }
 .welcome-features { list-style: none; padding: 0; }
 .welcome-features li { padding: 6px 0; font-size: 14px; border-bottom: 1px solid var(--gray-100, #f3f4f6); }
 .welcome-features strong { color: var(--primary-dark, #5661b3); }
 .welcome-recent-item { padding: 8px 12px; border-radius: 6px; cursor: pointer; margin-bottom: 4px; }
 .welcome-recent-item:hover { background: var(--gray-100); }
 .welcome-recent-name { font-size: 14px; font-weight: 500; display: block; }
 .welcome-recent-path { font-size: 12px; color: var(--gray-500); display: block; margin-top: 2px; overflow: hidden; text-overflow: ellipsis; }
 .welcome-muted { color: var(--gray-400); font-size: 14px; }
 .welcome-footer { margin-top: 32px; text-align: center; }
 .welcome-checkbox { font-size: 13px; color: var(--gray-500); cursor: pointer; }
@@ -0,0 +1,545 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Table 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;
            display: flex;
            flex-direction: column;
        }
        .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;
            flex: 1;
            overflow: auto;
        }
        .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;
        }
        .controls-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }
        .control-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .control-label {
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--ci-medium-gray);
        }
        .form-input, .form-select {
            padding: 8px 12px;
            border: 2px solid var(--ci-light-gray);
            border-radius: 6px;
            font-size: 0.875rem;
            font-family: inherit;
            transition: border-color 0.2s;
            min-width: 100px;
        }
        .form-input:focus, .form-select:focus {
            outline: none;
            border-color: var(--ci-accent);
        }
        .checkbox-label {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            cursor: pointer;
        }
        .checkbox-label input {
            width: 16px;
            height: 16px;
            accent-color: var(--ci-accent);
        }
        .table-container {
            overflow-x: auto;
            margin-bottom: 20px;
        }
        .editable-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.875rem;
        }
        .editable-table th,
        .editable-table td {
            border: 1px solid var(--ci-light-gray);
            padding: 0;
        }
        .editable-table th {
            background: var(--ci-dark-gray);
            color: var(--ci-white);
        }
        .editable-table input {
            width: 100%;
            padding: 10px 12px;
            border: none;
            font-family: inherit;
            font-size: 0.875rem;
            background: transparent;
        }
        .editable-table input:focus {
            outline: 2px solid var(--ci-accent);
            outline-offset: -2px;
            background: rgba(229, 70, 31, 0.05);
        }
        .editable-table th input {
            color: var(--ci-white);
            font-weight: 600;
        }
        .editable-table th input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .preview-container {
            background: var(--ci-black);
            border-radius: 8px;
            padding: 16px;
            max-height: 250px;
            overflow: auto;
        }
        .preview-content {
            font-family: 'JetBrains Mono', monospace;
            font-size: 13px;
            line-height: 1.4;
            color: #00ff00;
            white-space: pre;
        }
        .footer {
            display: flex;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 24px;
            background: var(--ci-white);
            border-top: 1px solid var(--ci-light-gray);
        }
        .footer-left {
            display: flex;
            gap: 8px;
        }
        .footer-right {
            display: flex;
            gap: 12px;
        }
        .btn {
            padding: 10px 20px;
            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;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--ci-accent);
            color: var(--ci-accent);
        }
        .btn-outline:hover {
            background: var(--ci-accent);
            color: var(--ci-white);
        }
        .btn-sm {
            padding: 6px 12px;
            font-size: 0.75rem;
        }
        .quick-templates {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .template-chip {
            padding: 6px 12px;
            background: var(--ci-light-gray);
            border-radius: 20px;
            font-size: 0.75rem;
            cursor: pointer;
            transition: all 0.2s;
            border: none;
        }
        .template-chip:hover {
            background: var(--ci-accent);
            color: var(--ci-white);
        }
    </style>
 </head>
 <body>
    <div class="header">
        <h1>Table Generator</h1>
    </div>
    <div class="container">
        <div class="section">
            <div class="section-title">Table Settings</div>
            <div class="controls-row">
                <div class="control-group">
                    <span class="control-label">Rows</span>
                    <input type="number" id="rows" class="form-input" min="1" max="50" value="4" style="width: 80px;">
                </div>
                <div class="control-group">
                    <span class="control-label">Columns</span>
                    <input type="number" id="cols" class="form-input" min="1" max="20" value="4" style="width: 80px;">
                </div>
                <div class="control-group">
                    <span class="control-label">Alignment</span>
                    <select id="alignment" class="form-select">
                        <option value="left">Left</option>
                        <option value="center">Center</option>
                        <option value="right">Right</option>
                    </select>
                </div>
                <div class="control-group" style="justify-content: flex-end;">
                    <label class="checkbox-label">
                        <input type="checkbox" id="has-header" checked>
                        Include Header Row
                    </label>
                </div>
            </div>
            <div class="quick-templates">
                <button class="template-chip" data-rows="3" data-cols="2">2-Column (3 rows)</button>
                <button class="template-chip" data-rows="5" data-cols="3">3-Column (5 rows)</button>
                <button class="template-chip" data-rows="4" data-cols="4">4x4 Grid</button>
                <button class="template-chip" data-rows="10" data-cols="3">Data Table (10 rows)</button>
                <button class="template-chip" data-rows="2" data-cols="5">Wide Table</button>
            </div>
        </div>
        <div class="section">
            <div class="section-title">Edit Table Content</div>
            <div class="table-container">
                <table class="editable-table" id="editable-table">
                    <!-- Generated dynamically -->
                </table>
            </div>
        </div>
        <div class="section">
            <div class="section-title">Markdown Preview</div>
            <div class="preview-container">
                <div id="preview" class="preview-content"></div>
            </div>
        </div>
    </div>
    <div class="footer">
        <div class="footer-left">
            <button class="btn btn-secondary btn-sm" id="btn-clear">Clear All</button>
            <button class="btn btn-outline btn-sm" id="btn-fill-sample">Fill Sample Data</button>
        </div>
        <div class="footer-right">
            <button class="btn btn-secondary" id="btn-copy">Copy Markdown</button>
            <button class="btn btn-primary" id="btn-insert">Insert to Editor</button>
        </div>
    </div>
    <script>
        let currentRows = 4;
        let currentCols = 4;
        let hasHeader = true;
        let alignment = 'left';
        // Generate the editable table
        function generateEditableTable() {
            const table = document.getElementById('editable-table');
            hasHeader = document.getElementById('has-header').checked;
            alignment = document.getElementById('alignment').value;
            let html = '';
            for (let i = 0; i < currentRows; i++) {
                html += '<tr>';
                for (let j = 0; j < currentCols; j++) {
                    const isHeader = hasHeader && i === 0;
                    const tag = isHeader ? 'th' : 'td';
                    const placeholder = isHeader ? `Header ${j + 1}` : `Cell ${i},${j + 1}`;
                    html += `<${tag}><input type="text" data-row="${i}" data-col="${j}" placeholder="${placeholder}"></${tag}>`;
                }
                html += '</tr>';
            }
            table.innerHTML = html;
            // Add event listeners for live preview
            table.querySelectorAll('input').forEach(input => {
                input.addEventListener('input', updatePreview);
            });
            updatePreview();
        }
        // Get table data
        function getTableData() {
            const data = [];
            for (let i = 0; i < currentRows; i++) {
                const row = [];
                for (let j = 0; j < currentCols; j++) {
                    const input = document.querySelector(`input[data-row="${i}"][data-col="${j}"]`);
                    row.push(input ? input.value || '' : '');
                }
                data.push(row);
            }
            return data;
        }
        // Generate markdown table
        function generateMarkdown(data) {
            if (data.length === 0 || data[0].length === 0) return '';
            // Calculate column widths
            const colWidths = [];
            for (let j = 0; j < data[0].length; j++) {
                let maxWidth = 3; // Minimum width for separator
                for (let i = 0; i < data.length; i++) {
                    maxWidth = Math.max(maxWidth, (data[i][j] || '').length);
                }
                colWidths.push(maxWidth);
            }
            // Generate alignment function
            const alignCell = (text, width) => {
                text = text || '';
                const padding = width - text.length;
                if (alignment === 'center') {
                    const left = Math.floor(padding / 2);
                    const right = padding - left;
                    return ' '.repeat(left) + text + ' '.repeat(right);
                } else if (alignment === 'right') {
                    return ' '.repeat(padding) + text;
                }
                return text + ' '.repeat(padding);
            };
            // Generate separator based on alignment
            const getSeparator = (width) => {
                if (alignment === 'center') {
                    return ':' + '-'.repeat(width - 2) + ':';
                } else if (alignment === 'right') {
                    return '-'.repeat(width - 1) + ':';
                }
                return '-'.repeat(width);
            };
            let markdown = '';
            const startRow = hasHeader ? 0 : -1;
            for (let i = startRow; i < data.length; i++) {
                if (i === -1) {
                    // Generate empty header for tables without header
                    markdown += '| ' + colWidths.map(w => ' '.repeat(w)).join(' | ') + ' |\n';
                } else {
                    const row = data[i];
                    const cells = row.map((cell, j) => alignCell(cell, colWidths[j]));
                    markdown += '| ' + cells.join(' | ') + ' |\n';
                }
                // Add separator after first row
                if ((hasHeader && i === 0) || (!hasHeader && i === -1)) {
                    const separators = colWidths.map(w => getSeparator(w));
                    markdown += '| ' + separators.join(' | ') + ' |\n';
                }
            }
            return markdown;
        }
        // Update preview
        function updatePreview() {
            const data = getTableData();
            const markdown = generateMarkdown(data);
            document.getElementById('preview').textContent = markdown;
        }
        // Event listeners
        document.getElementById('rows').addEventListener('change', (e) => {
            currentRows = parseInt(e.target.value) || 4;
            generateEditableTable();
        });
        document.getElementById('cols').addEventListener('change', (e) => {
            currentCols = parseInt(e.target.value) || 4;
            generateEditableTable();
        });
        document.getElementById('alignment').addEventListener('change', () => {
            updatePreview();
        });
        document.getElementById('has-header').addEventListener('change', () => {
            generateEditableTable();
        });
        // Quick templates
        document.querySelectorAll('.template-chip').forEach(chip => {
            chip.addEventListener('click', () => {
                currentRows = parseInt(chip.dataset.rows);
                currentCols = parseInt(chip.dataset.cols);
                document.getElementById('rows').value = currentRows;
                document.getElementById('cols').value = currentCols;
                generateEditableTable();
            });
        });
        // Clear all
        document.getElementById('btn-clear').addEventListener('click', () => {
            document.querySelectorAll('#editable-table input').forEach(input => {
                input.value = '';
            });
            updatePreview();
        });
        // Fill sample data
        document.getElementById('btn-fill-sample').addEventListener('click', () => {
            const sampleHeaders = ['Name', 'Description', 'Status', 'Priority', 'Due Date'];
            const sampleData = [
                ['Task 1', 'First task description', 'In Progress', 'High', '2024-01-15'],
                ['Task 2', 'Second task description', 'Completed', 'Medium', '2024-01-10'],
                ['Task 3', 'Third task description', 'Pending', 'Low', '2024-01-20'],
                ['Task 4', 'Fourth task description', 'In Review', 'High', '2024-01-18']
            ];
            for (let i = 0; i < currentRows; i++) {
                for (let j = 0; j < currentCols; j++) {
                    const input = document.querySelector(`input[data-row="${i}"][data-col="${j}"]`);
                    if (input) {
                        if (hasHeader && i === 0) {
                            input.value = sampleHeaders[j % sampleHeaders.length];
                        } else {
                            const dataRow = hasHeader ? i - 1 : i;
                            if (dataRow < sampleData.length && j < sampleData[dataRow].length) {
                                input.value = sampleData[dataRow][j];
                            } else {
                                input.value = `Data ${i}-${j + 1}`;
                            }
                        }
                    }
                }
            }
            updatePreview();
        });
        // Copy markdown
        document.getElementById('btn-copy').addEventListener('click', () => {
            const markdown = document.getElementById('preview').textContent;
            navigator.clipboard.writeText(markdown).then(() => {
                const btn = document.getElementById('btn-copy');
                btn.textContent = 'Copied!';
                setTimeout(() => {
                    btn.textContent = 'Copy Markdown';
                }, 2000);
            });
        });
        // Insert to editor
        document.getElementById('btn-insert').addEventListener('click', () => {
            const content = document.getElementById('preview').textContent;
            if (content && window.electronAPI) {
                window.electronAPI.send('insert-generated-content', '\n' + content + '\n');
                window.close();
            }
        });
        // Initialize
        generateEditableTable();
    </script>
 </body>
 </html>
@@ -0,0 +1,90 @@
 # API Documentation
 **Base URL:** `https://api.example.com/v1`
 **Version:** 1.0
 **Date:** {{DATE}}
 ## Authentication
 All requests require an API key in the header:
 ```
 Authorization: Bearer YOUR_API_KEY
 ```
 ## Endpoints
 ### Get All Resources
 ```
 GET /resources
 ```
 **Query Parameters:**
 | Parameter | Type | Required | Description |
 |-----------|------|----------|-------------|
 | page | integer | No | Page number (default: 1) |
 | limit | integer | No | Items per page (default: 20) |
 **Response:**
 ```json
 {
  "data": [],
  "total": 0,
  "page": 1
 }
 ```
 ### Get Resource by ID
 ```
 GET /resources/:id
 ```
 **Response:**
 ```json
 {
  "id": "1",
  "name": "Resource name",
  "created_at": "2024-01-01T00:00:00Z"
 }
 ```
 ### Create Resource
 ```
 POST /resources
 ```
 **Request Body:**
 ```json
 {
  "name": "New resource",
  "description": "Description"
 }
 ```
 ### Update Resource
 ```
 PUT /resources/:id
 ```
 ### Delete Resource
 ```
 DELETE /resources/:id
 ```
 ## Error Codes
 | Code | Description |
 |------|-------------|
 | 400 | Bad Request |
 | 401 | Unauthorized |
 | 404 | Not Found |
 | 500 | Internal Server Error |
@@ -0,0 +1,20 @@
 ---
 title: Blog Post Title
 date: {{DATE}}
 author: Your Name
 tags: []
 ---
 # Blog Post Title
 ## Introduction
 Write your introduction here.
 ## Main Content
 Your main content goes here.
 ## Conclusion
 Wrap up your thoughts.
@@ -0,0 +1,20 @@
 # Changelog
 ## [Unreleased]
 ### Added
 - New feature
 ### Changed
 - Updated feature
 ### Fixed
 - Bug fix
 ### Removed
 - Removed feature
 ## [1.0.0] - {{DATE}}
 ### Added
 - Initial release
@@ -0,0 +1,59 @@
 # Comparison: [Option A] vs [Option B]
 **Date:** {{DATE}}
 **Author:** Your Name
 ## Overview
 Brief description of what is being compared and why.
 ## Feature Comparison
 | Feature | Option A | Option B |
 |---------|----------|----------|
 | Feature 1 | Yes | Yes |
 | Feature 2 | Yes | No |
 | Feature 3 | No | Yes |
 | Feature 4 | Partial | Yes |
 ## Pricing
 | Plan | Option A | Option B |
 |------|----------|----------|
 | Free | Limited | Limited |
 | Pro | $10/mo | $15/mo |
 | Enterprise | Custom | Custom |
 ## Pros and Cons
 ### Option A
 **Pros:**
 - Pro 1
 - Pro 2
 **Cons:**
 - Con 1
 - Con 2
 ### Option B
 **Pros:**
 - Pro 1
 - Pro 2
 **Cons:**
 - Con 1
 - Con 2
 ## Performance
 | Metric | Option A | Option B |
 |--------|----------|----------|
 | Speed | Fast | Moderate |
 | Memory | Low | Medium |
 | Scalability | Good | Excellent |
 ## Recommendation
 Based on the analysis above, [Option A/B] is recommended for [use case] because [reason].
@@ -0,0 +1,26 @@
 # Meeting Notes
 **Date:** {{DATE}}
 **Attendees:**
 - Name 1
 - Name 2
 ## Agenda
 1. Topic 1
 2. Topic 2
 ## Discussion
 ### Topic 1
 Notes here.
 ## Action Items
 - [ ] Action item 1 — Owner — Due date
 - [ ] Action item 2 — Owner — Due date
 ## Next Meeting
 Date: TBD
@@ -0,0 +1,54 @@
 # Project Plan: [Project Name]
 **Date:** {{DATE}}
 **Project Lead:** Your Name
 **Status:** Planning
 ## Goals
 1. Primary goal
 2. Secondary goal
 ## Scope
 ### In Scope
 - Item 1
 - Item 2
 ### Out of Scope
 - Item 1
 ## Milestones
 | Milestone | Target Date | Status |
 |-----------|-------------|--------|
 | Kickoff | {{DATE}} | Not Started |
 | MVP | TBD | Not Started |
 | Launch | TBD | Not Started |
 ## Resources
 | Role | Person | Allocation |
 |------|--------|------------|
 | Lead | Name | 100% |
 | Developer | Name | 50% |
 ## Risks
 | Risk | Impact | Likelihood | Mitigation |
 |------|--------|------------|------------|
 | Risk 1 | High | Medium | Plan |
 ## Timeline
 ### Phase 1: Planning
 - [ ] Define requirements
 - [ ] Create design documents
 ### Phase 2: Development
 - [ ] Implement core features
 - [ ] Write tests
 ### Phase 3: Launch
 - [ ] Deploy to production
 - [ ] Monitor and iterate
@@ -0,0 +1,38 @@
 # Project Name
 Brief description of the project.
 ## Features
 - Feature 1
 - Feature 2
 ## Installation
 ```bash
 npm install project-name
 ```
 ## Usage
 ```javascript
 const project = require('project-name');
 ```
 ## Configuration
 | Option | Default | Description |
 |--------|---------|-------------|
 | option1 | true | Description |
 ## Contributing
 1. Fork the repository
 2. Create your feature branch
 3. Commit your changes
 4. Push to the branch
 5. Open a Pull Request
 ## License
 MIT
@@ -0,0 +1,42 @@
 # Release Notes - v1.0.0
 **Release Date:** {{DATE}}
 ## Highlights
 Brief summary of the most important changes in this release.
 ## New Features
 - **Feature 1:** Description of the new feature
 - **Feature 2:** Description of the new feature
 ## Improvements
 - Improved performance of feature X
 - Updated dependency Y to version Z
 ## Bug Fixes
 - Fixed issue where X would cause Y (#123)
 - Resolved crash when performing Z (#456)
 ## Breaking Changes
 - Changed API endpoint from `/old` to `/new`
 - Removed deprecated method `oldMethod()`
 ## Migration Guide
 ### From v0.9.x to v1.0.0
 1. Update configuration file format
 2. Replace deprecated API calls
 ## Known Issues
 - Issue description (#789)
 ## Contributors
 Thanks to everyone who contributed to this release.
@@ -0,0 +1,42 @@
 # Technical Specification: [Feature Name]
 **Version:** 1.0
 **Date:** {{DATE}}
 **Author:** Your Name
 **Status:** Draft
 ## Overview
 Brief description of what this feature does.
 ## Requirements
 ### Functional Requirements
 1. Requirement 1
 2. Requirement 2
 ### Non-Functional Requirements
 1. Performance requirement
 2. Security requirement
 ## Architecture
 Describe the technical approach.
 ## API Design
 ### Endpoints
 | Method | Path | Description |
 |--------|------|-------------|
 | GET | /api/resource | Get resource |
 ## Testing Strategy
 Describe how this will be tested.
 ## Timeline
 | Phase | Duration | Deliverables |
 |-------|----------|-------------|
 | Phase 1 | 1 week | Core implementation |
@@ -0,0 +1,71 @@
 # Tutorial: [Topic Name]
 **Date:** {{DATE}}
 **Difficulty:** Beginner / Intermediate / Advanced
 **Time:** ~30 minutes
 ## Prerequisites
 - Prerequisite 1
 - Prerequisite 2
 ## What You Will Learn
 - Learning objective 1
 - Learning objective 2
 ## Step 1: Getting Started
 Description of the first step.
 ```bash
 # Example command
 echo "Hello, World!"
 ```
 ## Step 2: Core Concepts
 Explain the main concepts here.
 ### Key Concept A
 Details about concept A.
 ### Key Concept B
 Details about concept B.
 ## Step 3: Building the Feature
 Walk through the implementation.
 ```javascript
 // Example code
 function example() {
    return 'Hello';
 }
 ```
 ## Step 4: Testing
 How to verify everything works.
 ## Common Issues
 ### Issue 1
 **Problem:** Description of the problem.
 **Solution:** How to fix it.
 ### Issue 2
 **Problem:** Description of the problem.
 **Solution:** How to fix it.
 ## Next Steps
 - Suggested follow-up 1
 - Suggested follow-up 2
 ## Resources
 - [Resource 1](https://example.com)
 - [Resource 2](https://example.com)
@@ -0,0 +1,78 @@
 function createWelcomeContent(recentFiles = []) {
    const recentHtml = recentFiles.length
        ? recentFiles.map(f => {
            const name = f.split(/[/\\]/).pop();
            return `<div class="welcome-recent-item" data-path="${f}"><span class="welcome-recent-name">${name}</span><span class="welcome-recent-path">${f}</span></div>`;
        }).join('')
        : '<p class="welcome-muted">No recent files</p>';
    return `
    <div class="welcome-container">
        <div class="welcome-hero">
            <h1 class="welcome-title">MarkdownConverter</h1>
            <p class="welcome-version">Version 4.0.0</p>
            <p class="welcome-subtitle">Professional Markdown Editor & Universal Document Converter</p>
        </div>
        <div class="welcome-grid">
            <div class="welcome-section">
                <h2>Quick Start</h2>
                <div class="welcome-cards">
                    <div class="welcome-card" data-action="new-file">
                        <div class="welcome-card-icon">+</div>
                        <h3>New Document</h3>
                        <p>Create a blank document</p>
                        <kbd>Ctrl+N</kbd>
                    </div>
                    <div class="welcome-card" data-action="open-file">
                        <div class="welcome-card-icon">&#128194;</div>
                        <h3>Open File</h3>
                        <p>Open an existing file</p>
                        <kbd>Ctrl+O</kbd>
                    </div>
                    <div class="welcome-card" data-action="open-template">
                        <div class="welcome-card-icon">&#128203;</div>
                        <h3>From Template</h3>
                        <p>Start from a template</p>
                    </div>
                    <div class="welcome-card" data-action="command-palette">
                        <div class="welcome-card-icon">&#8984;</div>
                        <h3>Command Palette</h3>
                        <p>Search all actions</p>
                        <kbd>Ctrl+Shift+P</kbd>
                    </div>
                </div>
            </div>
            <div class="welcome-section">
                <h2>What's New in v4.0.0</h2>
                <ul class="welcome-features">
                    <li><strong>CodeMirror Editor</strong> — Syntax highlighting, code folding, multiple cursors</li>
                    <li><strong>Sidebar Panels</strong> — File Explorer, Git, Snippets, Templates</li>
                    <li><strong>Command Palette</strong> — Quick access to all actions</li>
                    <li><strong>Code Execution</strong> — Run JS, Python, Bash from code blocks</li>
                    <li><strong>Print Preview</strong> — Full print customization dialog</li>
                    <li><strong>New Formats</strong> — Reveal.js, YAML, JSON, Confluence, and more</li>
                    <li><strong>Spell Checking</strong> — System dictionary with suggestions</li>
                    <li><strong>Markdown Extensions</strong> — Footnotes, admonitions, TOC</li>
                    <li><strong>Image Handling</strong> — Paste and drag-drop images</li>
                    <li><strong>PlantUML</strong> — Diagram rendering in preview</li>
                </ul>
            </div>
            <div class="welcome-section">
                <h2>Recent Files</h2>
                <div class="welcome-recent">${recentHtml}</div>
            </div>
        </div>
        <div class="welcome-footer">
            <label class="welcome-checkbox">
                <input type="checkbox" id="show-welcome-startup" checked>
                Show this tab on startup
            </label>
        </div>
    </div>`;
 }
 module.exports = { createWelcomeContent };
@@ -10,8 +10,10 @@ const PizZip = require('pizzip');
 const Docx = require('docx4js').default;
 class WordTemplateExporter {
-    constructor(templatePath) {
+    constructor(templatePath, startPage = 3, pageSettings = null) {
        this.templatePath = templatePath || path.join(__dirname, '../word_template.docx');
        this.startPage = startPage; // Which page to start inserting content
        this.pageSettings = pageSettings; // Page size and orientation settings
    }
    /**
@@ -24,13 +26,18 @@ class WordTemplateExporter {
            const zip = new PizZip(templateBuffer);
            // Extract document.xml
-            const documentXml = zip.file('word/document.xml').asText();
+            let documentXml = zip.file('word/document.xml').asText();
            // Set page size if settings provided
            if (this.pageSettings) {
                documentXml = this.setPageSize(documentXml);
            }
            // Parse markdown and generate Word XML
            const newContentXml = this.markdownToWordXml(markdownContent);
-            // Insert new content after page 2 (after the section break)
+            // Insert new content after the specified start page
-            const modifiedXml = this.insertContentAfterPage2(documentXml, newContentXml);
+            const modifiedXml = this.insertContentAfterPage(documentXml, newContentXml, this.startPage);
            // Update the zip with modified XML
            zip.file('word/document.xml', modifiedXml);
@@ -47,20 +54,83 @@ class WordTemplateExporter {
    }
    /**
-     * Insert markdown content after page 2 in the document
+     * Set page size in document XML
     */
-    insertContentAfterPage2(documentXml, newContentXml) {
+    setPageSize(documentXml) {
-        // Find the last section break (after page 2)
+        // Import PAGE_SIZES from main process (need to pass as parameter)
        const PAGE_SIZES = {
            a4: { width: 11906, height: 16838 },
            a3: { width: 16838, height: 23811 },
            a5: { width: 8391, height: 11906 },
            b4: { width: 14170, height: 20015 },
            b5: { width: 9979, height: 14170 },
            letter: { width: 12240, height: 15840 },
            legal: { width: 12240, height: 20160 },
            tabloid: { width: 15840, height: 24480 }
        };
        let width, height;
        const pageSize = PAGE_SIZES[this.pageSettings.size];
        if (pageSize) {
            width = pageSize.width;
            height = pageSize.height;
        } else {
            // Default to A4
            width = 11906;
            height = 16838;
        }
        // Swap dimensions for landscape
        if (this.pageSettings.orientation === 'landscape') {
            [width, height] = [height, width];
        }
        // Update all <w:pgSz> elements in section properties
        const pgSzRegex = /<w:pgSz[^>]*\/>/g;
        let modifiedXml = documentXml.replace(pgSzRegex, () => {
            return `<w:pgSz w:w="${width}" w:h="${height}" w:orient="${this.pageSettings.orientation}"/>`;
        });
        // If no pgSz found, add it to all sectPr elements
        if (!pgSzRegex.test(documentXml)) {
            const sectPrRegex = /<w:sectPr[^>]*>/g;
            modifiedXml = modifiedXml.replace(sectPrRegex, (match) => {
                return `${match}<w:pgSz w:w="${width}" w:h="${height}" w:orient="${this.pageSettings.orientation}"/>`;
            });
        }
        return modifiedXml;
    }
    /**
     * Insert markdown content after the specified page in the document
     * @param {string} documentXml - The document XML
     * @param {string} newContentXml - The new content to insert
     * @param {number} afterPage - Insert content after this page number (1-based)
     */
    insertContentAfterPage(documentXml, newContentXml, afterPage) {
        // Find section breaks that mark page boundaries
        // Look for the section properties tag that marks page breaks
        const sectionBreakRegex = /<w:sectPr[^>]*>[\s\S]*?<\/w:sectPr>/g;
        const matches = [...documentXml.matchAll(sectionBreakRegex)];
-        if (matches.length >= 2) {
+        // Calculate which section break to insert after
-            // Insert after the 2nd section break
+        // Page 1 = before 1st section break
-            const insertPoint = matches[1].index + matches[1][0].length;
+        // Page 2 = after 1st section break
        // Page 3 = after 2nd section break, etc.
        const sectionIndex = afterPage - 1;
        if (matches.length >= sectionIndex && sectionIndex > 0) {
            // Insert after the specified section break
            const insertPoint = matches[sectionIndex - 1].index + matches[sectionIndex - 1][0].length;
            return documentXml.slice(0, insertPoint) + newContentXml + documentXml.slice(insertPoint);
        } else if (afterPage === 1 || matches.length === 0) {
            // Insert at the beginning (after <w:body>) or if no section breaks found
            const bodyStart = documentXml.indexOf('<w:body>') + 8;
            return documentXml.slice(0, bodyStart) + newContentXml + documentXml.slice(bodyStart);
        } else {
-            // If no section breaks found, insert before closing body tag
+            // If not enough section breaks, insert before closing body tag
            return documentXml.replace('</w:body>', newContentXml + '</w:body>');
        }
    }
@@ -239,23 +309,42 @@ class WordTemplateExporter {
    }
    /**
-     * Create code block XML
+     * Create code block XML - renders each line as separate paragraph
     * to preserve exact formatting like in preview (monospace, no wrapping)
     * Background shading applied at paragraph level to extend full width
     */
    createCodeBlockXml(code) {
-        const escapedCode = this.escapeXml(code);
+        const lines = code.split('\n');
        let xml = '';
-        return `<w:p>
+        lines.forEach((line, index) => {
-            <w:pPr>
+            const escapedLine = this.escapeXml(line);
-                <w:pStyle w:val="Code"/>
+
-            </w:pPr>
+            // Each line gets its own paragraph with exact spacing and no wrapping
-            <w:r>
+            // Shading (shd) is at paragraph level so background extends full width
-                <w:rPr>
+            xml += `<w:p>
-                    <w:rFonts w:ascii="Consolas" w:hAnsi="Consolas"/>
+                <w:pPr>
-                    <w:sz w:val="18"/>
+                    <w:pStyle w:val="Normal"/>
-                </w:rPr>
+                    <w:shd w:val="clear" w:color="auto" w:fill="F5F5F5"/>
-                <w:t xml:space="preserve">${escapedCode}</w:t>
+                    <w:spacing w:before="${index === 0 ? '120' : '0'}" w:after="${index === lines.length - 1 ? '120' : '0'}" w:line="240" w:lineRule="exact"/>
-            </w:r>
+                    <w:ind w:left="284" w:right="284"/>
-        </w:p>`;
+                    <w:jc w:val="left"/>
                    <w:keepLines/>
                    <w:wordWrap w:val="0"/>
                </w:pPr>
                <w:r>
                    <w:rPr>
                        <w:rFonts w:ascii="Consolas" w:hAnsi="Consolas" w:cs="Consolas"/>
                        <w:sz w:val="18"/>
                        <w:szCs w:val="18"/>
                        <w:noProof/>
                    </w:rPr>
                    <w:t xml:space="preserve">${escapedLine}</w:t>
                </w:r>
            </w:p>`;
        });
        return xml;
    }
    /**
@@ -273,6 +362,7 @@ class WordTemplateExporter {
    /**
     * Create table XML from markdown table lines with template styling
     * Uses full-width tables with equal column distribution matching template style
     */
    createTableXml(tableLines) {
        // Parse table
@@ -294,13 +384,19 @@ class WordTemplateExporter {
        // Calculate number of columns
        const numCols = Math.max(...rows.map(row => row.length));
        // Calculate column width in twips (1440 twips = 1 inch)
        // Assume standard page width of 9360 twips (6.5 inches usable)
        const totalTableWidth = 9360;
        const colWidth = Math.floor(totalTableWidth / numCols);
        // Build table XML
        let tableXml = '<w:tbl>';
-        // Table properties - use template table style
+        // Table properties - use template table style with full width
        tableXml += `<w:tblPr>
            <w:tblStyle w:val="TableGrid"/>
-            <w:tblW w:w="5000" w:type="pct"/>
+            <w:tblW w:w="0" w:type="auto"/>
            <w:tblLayout w:type="fixed"/>
            <w:tblLook w:val="04A0" w:firstRow="1" w:lastRow="0" w:firstColumn="0" w:lastColumn="0" w:noHBand="0" w:noVBand="1"/>
            <w:tblBorders>
                <w:top w:val="single" w:sz="8" w:space="0" w:color="F58220"/>
@@ -312,20 +408,22 @@ class WordTemplateExporter {
            </w:tblBorders>
        </w:tblPr>`;
-        // Table grid
+        // Table grid with explicit column widths
        tableXml += '<w:tblGrid>';
        for (let i = 0; i < numCols; i++) {
-            tableXml += '<w:gridCol/>';
+            tableXml += `<w:gridCol w:w="${colWidth}"/>`;
        }
        tableXml += '</w:tblGrid>';
        // Table rows
        rows.forEach((rowCells, rowIndex) => {
            const isHeader = rowIndex === 0;
            const isEvenRow = rowIndex % 2 === 0;
            tableXml += '<w:tr>';
            // Row properties for consistent height
            tableXml += '<w:trPr><w:trHeight w:val="0" w:hRule="atLeast"/></w:trPr>';
            // Pad row to have same number of columns
            while (rowCells.length < numCols) {
                rowCells.push('');
@@ -335,9 +433,14 @@ class WordTemplateExporter {
                tableXml += '<w:tc>';
                tableXml += '<w:tcPr>';
                // Cell width
                tableXml += `<w:tcW w:w="${colWidth}" w:type="dxa"/>`;
                // Cell shading - orange for header, white for data rows
                if (isHeader) {
-                    tableXml += '<w:shd w:val="clear" w:color="FFFFFF" w:fill="F58220"/>';
+                    tableXml += '<w:shd w:val="clear" w:color="auto" w:fill="F58220"/>';
                } else {
                    tableXml += '<w:shd w:val="clear" w:color="auto" w:fill="FFFFFF"/>';
                }
                // Cell borders
@@ -347,12 +450,21 @@ class WordTemplateExporter {
                    '<w:bottom w:val="single" w:sz="8" w:space="0" w:color="F58220"/>' +
                    '<w:right w:val="single" w:sz="8" w:space="0" w:color="F58220"/>' +
                    '</w:tcBorders>';
                // Cell margins for proper padding
                tableXml += '<w:tcMar>' +
                    '<w:top w:w="80" w:type="dxa"/>' +
                    '<w:left w:w="120" w:type="dxa"/>' +
                    '<w:bottom w:w="80" w:type="dxa"/>' +
                    '<w:right w:w="120" w:type="dxa"/>' +
                    '</w:tcMar>';
                tableXml += '</w:tcPr>';
                // Cell content
                tableXml += '<w:p>';
                tableXml += '<w:pPr>';
-                tableXml += '<w:spacing w:before="100" w:after="100"/>';
+                tableXml += '<w:spacing w:before="0" w:after="0" w:line="240" w:lineRule="auto"/>';
                tableXml += '</w:pPr>';
                const runs = this.parseInlineFormatting(cellText);
@@ -374,6 +486,9 @@ class WordTemplateExporter {
        tableXml += '</w:tbl>';
        // Add spacing after table
        tableXml += '<w:p><w:pPr><w:spacing w:before="120" w:after="0"/></w:pPr></w:p>';
        return tableXml;
    }
@@ -383,15 +498,22 @@ class WordTemplateExporter {
    isAsciiArt(line) {
        // Don't treat markdown tables as ASCII art
        if (line.trim().startsWith('|') && line.trim().endsWith('|')) {
-            return false;
+            // Check if it's a proper markdown table (has multiple cells)
            const cells = line.split('|').filter(c => c.trim());
            if (cells.length >= 2) {
                return false;
            }
        }
-        // Common ASCII art characters
+        // Common ASCII art characters (Unicode box drawing and symbols)
        const asciiArtChars = [
            '─', '│', '┌', '┐', '└', '┘', '├', '┤', '┬', '┴', '┼',  // Box drawing
            '═', '║', '╔', '╗', '╚', '╝', '╠', '╣', '╦', '╩', '╬',  // Double box
-            '▲', '▼', '◄', '►', '♦', '●', '○', '■', '□',             // Shapes
+            '╭', '╮', '╯', '╰',                                      // Rounded corners
-            '↓', '→', '←', '↑',                                      // Arrows
+            '▲', '▼', '◄', '►', '♦', '●', '○', '■', '□', '◆', '◇',  // Shapes
            '↓', '→', '←', '↑', '↔', '↕', '⇒', '⇐', '⇓', '⇑',      // Arrows
            '┃', '━', '┏', '┓', '┗', '┛', '┣', '┫', '┳', '┻', '╋',  // Heavy box
            '░', '▒', '▓', '█',                                      // Shading
        ];
        // Check for box drawing characters
@@ -401,14 +523,18 @@ class WordTemplateExporter {
        // Check for ASCII box patterns with regular characters
        const asciiPatterns = [
-            /^\s*\+[-=_]+\+/,                    // +-----+
+            /^\s*\+[-=_+]+\+/,                   // +-----+ or +=====+
            /^\s*\|[-=_]{3,}\|/,                 // |-----|
            /^\s*[-=_]{5,}$/,                    // -----
            /^\s*\+[-]+\+[-]+\+/,                // +---+---+
            /^\s*\([A-Z][a-z]+\)\s*\|\|/,       // (Deformable) ||
            /^\s*\|\s+[A-Z\s]+[-:]\s+[A-Z]/,    // | TILE ADHESIVE - TYPE
            /^\s*\|\s*\[[^\]]+\]/,              // | [BIS Mark / CE Mark]
            /^\s*\|\s{2,}\w+.*\|\|/,            // ||  text  ||
-            /^\s*\[[^\]]+\]/,                   // [Step in brackets]
+            /^\s*\[[^\]]+\]\s*$/,               // [Step in brackets]
            /^\s*<[-=]+>/,                       // <----> or <====>
            /^\s*\/[-_\\\/]+\//,                 // /----/
            /^\s*\*[-=\*]+\*/,                   // *----*
        ];
        return asciiPatterns.some(pattern => pattern.test(line));
@@ -416,6 +542,7 @@ class WordTemplateExporter {
    /**
     * Create ASCII art XML with monospace font
     * Background shading applied at paragraph level to extend full width
     */
    createAsciiArtXml(asciiContent) {
        // Split ASCII art into individual lines and create a paragraph for each
@@ -423,10 +550,13 @@ class WordTemplateExporter {
        let xml = '';
        lines.forEach((line, index) => {
            // Shading (shd) is at paragraph level so background extends full width
            xml += `<w:p>
                <w:pPr>
                    <w:pStyle w:val="Normal"/>
                    <w:shd w:val="clear" w:color="auto" w:fill="F5F5F5"/>
                    <w:spacing w:before="${index === 0 ? '120' : '0'}" w:after="${index === lines.length - 1 ? '120' : '0'}" w:line="240" w:lineRule="exact"/>
-                    <w:ind w:left="0" w:right="0"/>
+                    <w:ind w:left="284" w:right="284"/>
                    <w:jc w:val="left"/>
                    <w:keepLines/>
                    <w:wordWrap w:val="0"/>
@@ -439,7 +569,6 @@ class WordTemplateExporter {
            if (hasArrow) {
                // Split line into parts and color arrows red
                let remainingLine = line;
                let processedText = '';
                while (remainingLine.length > 0) {
                    let foundArrow = false;
@@ -465,7 +594,6 @@ class WordTemplateExporter {
                                    <w:rFonts w:ascii="Consolas" w:hAnsi="Consolas" w:cs="Consolas"/>
                                    <w:sz w:val="16"/>
                                    <w:szCs w:val="16"/>
                                    <w:shd w:val="clear" w:color="auto" w:fill="F5F5F5"/>
                                    <w:noProof/>
                                </w:rPr>
                                <w:t xml:space="preserve">${beforeArrow}</w:t>
@@ -480,7 +608,6 @@ class WordTemplateExporter {
                                <w:sz w:val="16"/>
                                <w:szCs w:val="16"/>
                                <w:color w:val="FF0000"/>
                                <w:shd w:val="clear" w:color="auto" w:fill="F5F5F5"/>
                                <w:noProof/>
                            </w:rPr>
                            <w:t xml:space="preserve">${escapedArrow}</w:t>
@@ -496,7 +623,6 @@ class WordTemplateExporter {
                                <w:rFonts w:ascii="Consolas" w:hAnsi="Consolas" w:cs="Consolas"/>
                                <w:sz w:val="16"/>
                                <w:szCs w:val="16"/>
                                <w:shd w:val="clear" w:color="auto" w:fill="F5F5F5"/>
                                <w:noProof/>
                            </w:rPr>
                            <w:t xml:space="preserve">${escapedRemaining}</w:t>
@@ -512,7 +638,6 @@ class WordTemplateExporter {
                        <w:rFonts w:ascii="Consolas" w:hAnsi="Consolas" w:cs="Consolas"/>
                        <w:sz w:val="16"/>
                        <w:szCs w:val="16"/>
                        <w:shd w:val="clear" w:color="auto" w:fill="F5F5F5"/>
                        <w:noProof/>
                    </w:rPr>
                    <w:t xml:space="preserve">${escapedLine}</w:t>
@@ -0,0 +1,144 @@
 /**
 * @jest-environment jsdom
 */
 /**
 * Tests for CommandPalette
 * Tests command registration, filtering, execution, and keyboard navigation
 */
 describe('CommandPalette', () => {
    let CommandPalette;
    beforeEach(() => {
        document.body.innerHTML = `
            <div class="command-palette-overlay hidden" id="command-palette-overlay">
                <div class="command-palette">
                    <input type="text" id="command-palette-input">
                    <div id="command-palette-results"></div>
                </div>
            </div>
        `;
        CommandPalette = require('../src/command-palette').CommandPalette;
    });
    test('starts hidden', () => {
        const palette = new CommandPalette();
        expect(palette.isOpen()).toBe(false);
    });
    test('opens and focuses input', () => {
        const palette = new CommandPalette();
        palette.open();
        expect(palette.isOpen()).toBe(true);
    });
    test('closes', () => {
        const palette = new CommandPalette();
        palette.open();
        palette.close();
        expect(palette.isOpen()).toBe(false);
    });
    test('registers and renders commands', () => {
        const palette = new CommandPalette();
        palette.register('Test Command', 'Ctrl+T', () => {});
        palette.register('Another Command', '', () => {});
        palette.open();
        const items = document.querySelectorAll('.command-item');
        expect(items.length).toBe(2);
    });
    test('filters commands by search', () => {
        const palette = new CommandPalette();
        palette.register('Save File', 'Ctrl+S', () => {});
        palette.register('Open File', 'Ctrl+O', () => {});
        palette.register('Bold Text', 'Ctrl+B', () => {});
        palette.renderResults('file');
        const items = document.querySelectorAll('.command-item');
        expect(items.length).toBe(2);
    });
    test('executes command', () => {
        const palette = new CommandPalette();
        const action = jest.fn();
        palette.register('Test', '', action);
        palette.open();
        palette.executeSelected();
        expect(action).toHaveBeenCalled();
    });
    test('highlights matching text', () => {
        const palette = new CommandPalette();
        const result = palette.highlightMatch('Save File', 'save');
        expect(result).toContain('<strong>');
        expect(result).toContain('Save');
    });
    test('highlightMatch returns original text when no query', () => {
        const palette = new CommandPalette();
        const result = palette.highlightMatch('Save File', '');
        expect(result).toBe('Save File');
    });
    test('filters case-insensitively', () => {
        const palette = new CommandPalette();
        palette.register('Save File', '', () => {});
        palette.register('Open File', '', () => {});
        palette.renderResults('SAVE');
        const items = document.querySelectorAll('.command-item');
        expect(items.length).toBe(1);
    });
    test('shows all commands when query is empty', () => {
        const palette = new CommandPalette();
        palette.register('Cmd1', '', () => {});
        palette.register('Cmd2', '', () => {});
        palette.register('Cmd3', '', () => {});
        palette.renderResults('');
        const items = document.querySelectorAll('.command-item');
        expect(items.length).toBe(3);
    });
    test('displays shortcut when provided', () => {
        const palette = new CommandPalette();
        palette.register('Save File', 'Ctrl+S', () => {});
        palette.open();
        const shortcut = document.querySelector('.command-shortcut');
        expect(shortcut).not.toBeNull();
        expect(shortcut.textContent).toBe('Ctrl+S');
    });
    test('does not display shortcut when empty', () => {
        const palette = new CommandPalette();
        palette.register('Test Command', '', () => {});
        palette.open();
        const shortcut = document.querySelector('.command-shortcut');
        expect(shortcut).toBeNull();
    });
    test('closes on overlay click', () => {
        const palette = new CommandPalette();
        palette.open();
        // Simulate click on the overlay itself
        const event = new Event('click', { bubbles: true });
        Object.defineProperty(event, 'target', { value: palette.overlay });
        palette.overlay.dispatchEvent(event);
        expect(palette.isOpen()).toBe(false);
    });
    test('executeSelected does nothing when no commands', () => {
        const palette = new CommandPalette();
        palette.open();
        // Should not throw
        expect(() => palette.executeSelected()).not.toThrow();
    });
    test('closes after executing command', () => {
        const palette = new CommandPalette();
        palette.register('Test', '', jest.fn());
        palette.open();
        palette.executeSelected();
        expect(palette.isOpen()).toBe(false);
    });
 });
@@ -0,0 +1,100 @@
 /**
 * Tests for Main Process Utilities
 * Tests sanitization, rate limiting, and other main process helpers
 */
 describe('sanitizeErrorMessage', () => {
    const sanitizeErrorMessage = (message) => {
        if (typeof message !== 'string') return String(message);
        return message
            .replace(/[A-Z]:\\[^\s"']+\\([^\s"'\\]+)/gi, '$1')
            .replace(/\/[^\s"']+\/([^\s"'/]+)/g, '$1');
    };
    test('strips Windows absolute paths', () => {
        expect(sanitizeErrorMessage('Error in C:\\Users\\test\\file.js'))
            .toBe('Error in file.js');
    });
    test('strips Unix absolute paths', () => {
        expect(sanitizeErrorMessage('Error in /home/user/project/file.js'))
            .toBe('Error in file.js');
    });
    test('handles non-string input', () => {
        expect(sanitizeErrorMessage(42)).toBe('42');
        expect(sanitizeErrorMessage(null)).toBe('null');
    });
    test('preserves messages without paths', () => {
        expect(sanitizeErrorMessage('Something went wrong'))
            .toBe('Something went wrong');
    });
    test('strips nested Windows paths', () => {
        expect(sanitizeErrorMessage('Cannot read C:\\Users\\admin\\AppData\\Local\\config.json'))
            .toBe('Cannot read config.json');
    });
    test('strips nested Unix paths', () => {
        expect(sanitizeErrorMessage('File not found: /var/log/app/error.log'))
            .toBe('File not found: error.log');
    });
    test('handles undefined input', () => {
        expect(sanitizeErrorMessage(undefined)).toBe('undefined');
    });
 });
 describe('createRateLimiter', () => {
    const createRateLimiter = (minIntervalMs = 2000) => {
        let lastCall = 0;
        return function canProceed() {
            const now = Date.now();
            if (now - lastCall < minIntervalMs) return false;
            lastCall = now;
            return true;
        };
    };
    test('allows first call', () => {
        const limiter = createRateLimiter(1000);
        expect(limiter()).toBe(true);
    });
    test('blocks rapid calls', () => {
        const limiter = createRateLimiter(1000);
        limiter(); // first call
        expect(limiter()).toBe(false); // too soon
    });
    test('allows call after interval', () => {
        jest.useFakeTimers();
        const limiter = createRateLimiter(1000);
        limiter();
        jest.advanceTimersByTime(1001);
        expect(limiter()).toBe(true);
        jest.useRealTimers();
    });
    test('uses default interval of 2000ms', () => {
        jest.useFakeTimers();
        const limiter = createRateLimiter();
        limiter();
        jest.advanceTimersByTime(1999);
        expect(limiter()).toBe(false);
        jest.advanceTimersByTime(2);
        expect(limiter()).toBe(true);
        jest.useRealTimers();
    });
    test('resets after successful call', () => {
        jest.useFakeTimers();
        const limiter = createRateLimiter(500);
        limiter();
        jest.advanceTimersByTime(501);
        limiter(); // resets the timer
        expect(limiter()).toBe(false); // too soon after second call
        jest.useRealTimers();
    });
 });
@@ -0,0 +1,130 @@
 /**
 * Tests for Markdown Extensions
 * Tests TOC generation, admonition parsing, and PlantUML encoding
 */
 describe('Markdown Extensions', () => {
    describe('TOC generation from headings', () => {
        test('extracts all heading levels', () => {
            const html = '<h1>Title</h1><h2>Section 1</h2><h2>Section 2</h2><h3>Subsection</h3>';
            const headingRegex = /<h([1-6])[^>]*>(.*?)<\/h[1-6]>/gi;
            const toc = [];
            let match;
            while ((match = headingRegex.exec(html)) !== null) {
                toc.push({ level: parseInt(match[1]), text: match[2] });
            }
            expect(toc).toHaveLength(4);
            expect(toc[0]).toEqual({ level: 1, text: 'Title' });
            expect(toc[3]).toEqual({ level: 3, text: 'Subsection' });
        });
        test('handles empty HTML', () => {
            const html = '<p>No headings here</p>';
            const headingRegex = /<h([1-6])[^>]*>(.*?)<\/h[1-6]>/gi;
            const toc = [];
            let match;
            while ((match = headingRegex.exec(html)) !== null) {
                toc.push({ level: parseInt(match[1]), text: match[2] });
            }
            expect(toc).toHaveLength(0);
        });
        test('handles headings with attributes', () => {
            const html = '<h1 id="title" class="main">Title</h1><h2 id="sec">Section</h2>';
            const headingRegex = /<h([1-6])[^>]*>(.*?)<\/h[1-6]>/gi;
            const toc = [];
            let match;
            while ((match = headingRegex.exec(html)) !== null) {
                toc.push({ level: parseInt(match[1]), text: match[2] });
            }
            expect(toc).toHaveLength(2);
            expect(toc[0].text).toBe('Title');
        });
    });
    describe('Admonition regex matching', () => {
        test('matches note admonition', () => {
            const src = ':::note\nThis is a note.\n:::\n';
            const match = src.match(/^:::(note|warning|tip|danger|info)\s*\n([\s\S]*?)^:::\s*$/m);
            expect(match).not.toBeNull();
            expect(match[1]).toBe('note');
            expect(match[2].trim()).toBe('This is a note.');
        });
        test('matches all admonition types', () => {
            const types = ['note', 'warning', 'tip', 'danger', 'info'];
            types.forEach(type => {
                const src = `:::${type}\nContent\n:::\n`;
                const match = src.match(/^:::(note|warning|tip|danger|info)\s*\n([\s\S]*?)^:::\s*$/m);
                expect(match).not.toBeNull();
                expect(match[1]).toBe(type);
            });
        });
        test('does not match invalid admonition type', () => {
            const src = ':::custom\nContent\n:::\n';
            const match = src.match(/^:::(note|warning|tip|danger|info)\s*\n([\s\S]*?)^:::\s*$/m);
            expect(match).toBeNull();
        });
        test('captures multiline content', () => {
            const src = ':::warning\nLine 1\nLine 2\nLine 3\n:::\n';
            const match = src.match(/^:::(note|warning|tip|danger|info)\s*\n([\s\S]*?)^:::\s*$/m);
            expect(match).not.toBeNull();
            expect(match[2]).toContain('Line 1');
            expect(match[2]).toContain('Line 3');
        });
    });
    describe('PlantUML hex encoding', () => {
        const plantumlEncode = (text) => {
            const hex = Array.from(Buffer.from(text, 'utf-8'))
                .map(b => b.toString(16).padStart(2, '0'))
                .join('');
            return '~h' + hex;
        };
        test('encodes simple text', () => {
            const encoded = plantumlEncode('A -> B');
            expect(encoded).toBe('~h41202d3e2042');
        });
        test('encodes empty string', () => {
            expect(plantumlEncode('')).toBe('~h');
        });
        test('encodes special characters', () => {
            const encoded = plantumlEncode('@startuml');
            expect(encoded).toMatch(/^~h[0-9a-f]+$/);
            // '@' is 0x40, 's' is 0x73
            expect(encoded.startsWith('~h40')).toBe(true);
        });
    });
    describe('Slug generation for TOC anchors', () => {
        const slugify = (text) => {
            return text
                .toLowerCase()
                .replace(/[^\w\s-]/g, '')
                .replace(/\s+/g, '-')
                .replace(/-+/g, '-')
                .trim();
        };
        test('converts heading to slug', () => {
            expect(slugify('Hello World')).toBe('hello-world');
        });
        test('removes special characters', () => {
            expect(slugify('What is C++?')).toBe('what-is-c');
        });
        test('collapses multiple dashes', () => {
            expect(slugify('Hello   World')).toBe('hello-world');
        });
        test('handles already lowercase text', () => {
            expect(slugify('simple')).toBe('simple');
        });
    });
 });
@@ -0,0 +1,175 @@
 /**
 * Tests for Preload Script Security
 * Verifies that the IPC bridge is properly configured
 */
 describe('Preload Security', () => {
  describe('Allowed Channels', () => {
    const EXPECTED_SEND_CHANNELS = [
      'save-file',
      'save-current-file',
      'set-current-file',
      'save-recent-files',
      'clear-recent-files',
      'renderer-ready',
      'get-theme',
      'do-print',
      'do-print-with-options',
      'export-with-options',
      'export-spreadsheet',
      'batch-convert',
      'select-folder',
      'universal-convert',
      'universal-convert-batch',
      'image-convert',
      'image-batch-convert',
      'image-resize',
      'image-compress',
      'image-rotate',
      'audio-convert',
      'audio-batch-convert',
      'audio-extract',
      'audio-trim',
      'audio-merge',
      'video-convert',
      'video-batch-convert',
      'video-compress',
      'video-trim',
      'video-frames',
      'video-gif',
      'get-header-footer-settings',
      'save-header-footer-settings',
      'browse-header-footer-logo',
      'save-header-footer-logo',
      'clear-header-footer-logo',
      'get-page-settings',
      'update-page-settings',
      'set-custom-start-page',
      'process-pdf-operation',
      'get-pdf-page-count',
      'select-pdf-folder',
      'open-ascii-generator',
      'open-table-generator',
      'insert-generated-content',
      'save-pasted-image',
      'load-template',
      'list-directory',
      'open-file-path',
      'git-status',
      'git-stage',
      'git-commit',
      'git-log',
      'git-diff',
      'get-snippets',
      'save-snippet',
      'delete-snippet',
      'execute-code',
      'show-pdf-editor-from-toolbar',
      'menu-open',
      'export'
    ];
    const EXPECTED_RECEIVE_CHANNELS = [
      'file-new',
      'file-opened',
      'file-save',
      'get-content-for-save',
      'get-content-for-spreadsheet',
      'recent-files-cleared',
      'toggle-preview',
      'toggle-find',
      'theme-changed',
      'theme-data',
      'undo',
      'redo',
      'adjust-font-size',
      'print-preview',
      'print-preview-styled',
      'show-export-dialog',
      'show-batch-dialog',
      'show-universal-converter-dialog',
      'show-table-generator',
      'show-pdf-editor-dialog',
      'show-image-converter',
      'show-audio-converter',
      'show-video-converter',
      'open-pdf-viewer',
      'conversion-status',
      'conversion-complete',
      'batch-progress',
      'image-conversion-complete',
      'audio-conversion-complete',
      'video-conversion-complete',
      'folder-selected',
      'pdf-folder-selected',
      'header-footer-settings-data',
      'header-footer-logo-selected',
      'header-footer-logo-saved',
      'header-footer-logo-cleared',
      'page-settings-data',
      'pdf-page-count',
      'pdf-operation-complete',
      'pdf-operation-error',
      'pdf-operation-progress',
      'show-ascii-generator-window',
      'show-ascii-generator',
      'show-table-generator-window',
      'open-header-footer-dialog',
      'insert-content',
      'load-template-menu',
      'toggle-command-palette',
      'toggle-sidebar-panel',
      'toggle-bottom-panel'
    ];
    test('should define all expected send channels', () => {
      // This test documents expected channels
      expect(EXPECTED_SEND_CHANNELS.length).toBeGreaterThan(0);
    });
    test('should define all expected receive channels', () => {
      // This test documents expected channels
      expect(EXPECTED_RECEIVE_CHANNELS.length).toBeGreaterThan(0);
    });
  });
  describe('electronAPI Interface', () => {
    test('should expose send method', () => {
      expect(window.electronAPI.send).toBeDefined();
      expect(typeof window.electronAPI.send).toBe('function');
    });
    test('should expose on method', () => {
      expect(window.electronAPI.on).toBeDefined();
      expect(typeof window.electronAPI.on).toBe('function');
    });
    test('should expose once method', () => {
      expect(window.electronAPI.once).toBeDefined();
      expect(typeof window.electronAPI.once).toBe('function');
    });
    test('should expose invoke method', () => {
      expect(window.electronAPI.invoke).toBeDefined();
      expect(typeof window.electronAPI.invoke).toBe('function');
    });
    test('should expose file convenience methods', () => {
      expect(window.electronAPI.file).toBeDefined();
      expect(window.electronAPI.file.save).toBeDefined();
      expect(window.electronAPI.file.saveCurrent).toBeDefined();
      expect(window.electronAPI.file.setCurrent).toBeDefined();
    });
    test('should expose theme convenience methods', () => {
      expect(window.electronAPI.theme).toBeDefined();
      expect(window.electronAPI.theme.get).toBeDefined();
    });
    test('should expose pdf convenience methods', () => {
      expect(window.electronAPI.pdf).toBeDefined();
      expect(window.electronAPI.pdf.processOperation).toBeDefined();
      expect(window.electronAPI.pdf.getPageCount).toBeDefined();
    });
  });
 });
@@ -0,0 +1,109 @@
 /**
 * @jest-environment jsdom
 */
 /**
 * Tests for PrintPreview
 * Tests print dialog options, open/close, and preview rendering
 */
 describe('PrintPreview', () => {
    beforeEach(() => {
        // Mock electron require for executePrint
        jest.mock('electron', () => ({
            ipcRenderer: { send: jest.fn(), invoke: jest.fn() }
        }), { virtual: true });
        document.body.innerHTML = `
            <div class="dialog-overlay hidden" id="print-preview-overlay">
                <button id="print-preview-close"></button>
                <button id="print-cancel"></button>
                <button id="print-execute"></button>
                <select id="print-paper-size"><option value="A4">A4</option><option value="Letter">Letter</option></select>
                <select id="print-orientation"><option value="portrait">Portrait</option><option value="landscape">Landscape</option></select>
                <select id="print-margins"><option value="default">Default</option></select>
                <input type="range" id="print-scale" value="100">
                <span id="print-scale-value">100%</span>
                <input type="checkbox" id="print-headers" checked>
                <input type="checkbox" id="print-background" checked>
                <select id="print-pages"><option value="all">All</option><option value="custom">Custom</option></select>
                <input type="text" id="print-page-range" class="hidden">
                <iframe id="print-preview-frame"></iframe>
            </div>
        `;
    });
    test('getOptions returns default values', () => {
        const { PrintPreview } = require('../src/print-preview');
        const preview = new PrintPreview();
        const options = preview.getOptions();
        expect(options.paperSize).toBe('A4');
        expect(options.orientation).toBe('portrait');
        expect(options.scale).toBe(100);
        expect(options.headers).toBe(true);
        expect(options.background).toBe(true);
        expect(options.pages).toBe('all');
        expect(options.margins).toBe('default');
        expect(options.pageRange).toBe('');
    });
    test('opens and closes', () => {
        const { PrintPreview } = require('../src/print-preview');
        const preview = new PrintPreview();
        preview.open('<p>Test</p>');
        expect(document.getElementById('print-preview-overlay').classList.contains('hidden')).toBe(false);
        preview.close();
        expect(document.getElementById('print-preview-overlay').classList.contains('hidden')).toBe(true);
    });
    test('updateScaleLabel reflects slider value', () => {
        const { PrintPreview } = require('../src/print-preview');
        const preview = new PrintPreview();
        document.getElementById('print-scale').value = '75';
        preview.updateScaleLabel();
        expect(document.getElementById('print-scale-value').textContent).toBe('75%');
    });
    test('close button closes preview', () => {
        const { PrintPreview } = require('../src/print-preview');
        const preview = new PrintPreview();
        preview.open('<p>Test</p>');
        document.getElementById('print-preview-close').click();
        expect(document.getElementById('print-preview-overlay').classList.contains('hidden')).toBe(true);
    });
    test('cancel button closes preview', () => {
        const { PrintPreview } = require('../src/print-preview');
        const preview = new PrintPreview();
        preview.open('<p>Test</p>');
        document.getElementById('print-cancel').click();
        expect(document.getElementById('print-preview-overlay').classList.contains('hidden')).toBe(true);
    });
    test('getOptions reflects changed values', () => {
        const { PrintPreview } = require('../src/print-preview');
        const preview = new PrintPreview();
        // Change paper size to Letter
        const paperSelect = document.getElementById('print-paper-size');
        paperSelect.value = 'Letter';
        // Change scale
        document.getElementById('print-scale').value = '50';
        // Uncheck headers
        document.getElementById('print-headers').checked = false;
        const options = preview.getOptions();
        expect(options.paperSize).toBe('Letter');
        expect(options.scale).toBe(50);
        expect(options.headers).toBe(false);
    });
    test('stores last content for refresh', () => {
        const { PrintPreview } = require('../src/print-preview');
        const preview = new PrintPreview();
        preview.open('<p>Hello World</p>');
        expect(preview._lastContent).toBe('<p>Hello World</p>');
    });
 });
--- a/Show More
+++ b/Show More