docs(plans): add theme-registry + flowchart-editor implementation plans

Two step-by-step TDD plans derived from the 2026-09-14 design specs:

* theme-registry: 9 tasks, 70+ steps. Creates src/main/ThemeRegistry.js
  (pure module), bootstrap with 37 themes, buildThemeMenu for main.js,
  migrates 25 existing per-theme CSS blocks into src/styles/themes/<id>.css,
  rewrites the renderer apply-theme function to toggle <link disabled>,
  adds 12 new theme CSS files using shared token vocabulary.
* flowchart-editor: 8 tasks, 41 TDD steps. Pure renderer-side feature
  (no main-process modules). Pure data store with IO injection, 5 SVG
  shape functions, Mermaid translator, hand-rolled SVG canvas with
  pointer events, sidebar panel wiring with debounced preview (250ms)
  + debounced persistence (500ms) + panel-scoped keyboard shortcuts.
  Three minimal userData-path-validated IPC channels added for
  persistence (renderer can't reach <userData> under the current
  nodeIntegration:true security model without them).

Amit Haridas

.github/workflows/release.yml

@@ -68,9 +68,27 @@ jobs:
 
       - name: Bundle MarkItDown (optional, best effort)
         # Windows runners ship python + venv; non-fatal on failure — the
-        # package then omits the bundled binary by design
+        # package then omits the bundled binary by design. We capture the
-        run: npm run bundle:markitdown
+        # log so a silent failure is visible in the GitHub Actions step UI
+        # instead of disappearing into stdout.
+        run: |
+          python -m pip install --upgrade pip wheel setuptools 2>&1 | tee bundle-pip.log
+          npm run bundle:markitdown 2>&1 | tee bundle-markitdown.log
+          if [ ! -f bin/win32/markitdown.exe ]; then
+            echo "::warning::bin/win32/markitdown.exe was not produced — see bundle-markitdown.log"
+          fi
         continue-on-error: true
+        shell: bash
+
+      - name: Upload MarkItDown bundle logs (on failure)
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-bundle-logs
+          path: |
+            bundle-pip.log
+            bundle-markitdown.log
+          retention-days: 5
 
       - name: Run tests
         run: npm test

README.md

@@ -56,7 +56,7 @@ A powerful cross-platform Markdown editor and document converter powered by Pand
 - **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.)
-- **MarkItDown import** - Any file → Markdown via [Microsoft MarkItDown](https://github.com/microsoft/markitdown): PDF, DOCX, PPTX, XLSX, Outlook .msg, EPUB, images, ZIP (audio/OCR with the `[all]` extras)
+- **MarkItDown import** - Any file → Markdown via [Microsoft MarkItDown](https://github.com/microsoft/markitdown). **Bundled** (MIT + PSF Python runtime) — no installation required for the core formats (PDF, DOCX, PPTX, XLSX, Outlook .msg, EPUB, HTML, images, ZIP, CSV, JSON, XML). For **audio transcription** and **OCR**, install `markitdown[all]` system-side (multi-GB ML models; not bundled).
 - **Excel export** - Markdown tables to native .xlsx workbooks (one sheet per table)
 - **AI Assistant** - Multi-provider AI help (OpenAI/Anthropic/Ollama/LM Studio): chat panel, summarize/improve/translate commands, grammar proofreading
 - **Inline comments** - Anchor-based document comments in `.comments/` sidecars with F8 navigation
@@ -71,9 +71,10 @@ A powerful cross-platform Markdown editor and document converter powered by Pand
 ## Installation
 
 ### Prerequisites
-- [Node.js](https://nodejs.org/) (v16 or later)
+- [Node.js](https://nodejs.org/) (v16 or later) — only for development builds
-- [Pandoc](https://pandoc.org/installing.html) (required for export functionality)
+- [Pandoc](https://pandoc.org/installing.html) — **bundled** inside the app, no install needed
-- Optional: [MarkItDown](https://github.com/microsoft/markitdown) (`pip install "markitdown[all]"`) for any-file → Markdown import
+- [MarkItDown](https://github.com/microsoft/markitdown) — **bundled** inside the app (MIT + embedded PSF Python runtime via PyInstaller), no install needed for PDF / DOCX / PPTX / XLSX / Outlook / EPUB / HTML / images / ZIP / CSV / JSON / XML
+- Optional for advanced import only: `pip install "markitdown[all]"` adds **audio transcription** (Whisper) and **OCR** (EasyOCR/Tesseract) — these are multi-GB model downloads and are not bundled for size reasons
 
 ### Install Dependencies
 ```bash