- Update marked from ^16.2.1 to ^17.0.3
- Add marked-highlight ^2.2.3 for syntax highlighting support
- Replace deprecated marked.setOptions() with marked.use() in renderer.js
- Extract highlight config into markedHighlight() extension (required in v17)
- Update test mock to reflect new API (use instead of setOptions)
Deleted various image, PDF, and DOCX files that are no longer needed, as well as a sample YAML configuration. Updated .claude/settings.local.json to add new allowed Bash commands for local development.
Major Features:
- Integrated PDF viewer with zoom, page navigation, and fit modes
- PDF editor toolbar with direct access to all PDF operations
- New app branding with docico1.png icon
- ConcreteInfo theme (light & dark variants)
- Comprehensive PDF editing: merge, split, compress, rotate, delete, reorder
- Watermark, encrypt, decrypt, and permissions management
- Overwrite original file option for all PDF operations
UI Improvements:
- PDF viewer takes full screen when active (hides tabs and toolbar)
- Compact modals with reduced font sizes
- Dark theme fixes for icons and dialogs
- Save/Save As options for PDF operations
- Improved PDF toolbar theming
Technical:
- Added isPdfViewerActive state tracking
- Proper PDF document lifecycle management
- Fixed hang issues when switching between PDF and markdown
- All dependencies are open-source (MIT, Apache 2.0, BSD)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Introduces IMPROVEMENT_PLAN.md outlining a comprehensive roadmap for PanConverter v3.0, including security hardening, testing infrastructure, code refactoring, developer experience, performance optimization, new features, and community building. The plan details phased implementation, success metrics, risk assessment, and resource requirements.
New Features:
• Export Profiles - Save and load export configurations
• Mermaid.js diagram support - Render flowcharts, sequence diagrams, and more
• Command Palette (Ctrl+Shift+P) - Quick access to all commands
• GitHub Light/Dark preview themes - Beautiful code preview styling
• Table Generator - Interactive table creation tool
• ASCII Art Generator - Create text banners, boxes, and templates
• Resizable Preview Pane - Drag divider to adjust editor/preview sizes
• Pop-out Preview Window - Open preview in separate window with live sync
UI/UX Improvements:
• Fixed advanced export dialog visibility (added .hidden CSS class)
• GitHub-style table headers with light grey background
• Removed gradients from table headers
• Clean, professional preview rendering
Technical Changes:
• Updated all UI components for new features
• Enhanced TabManager to support resizable panes
• Added MutationObserver for live preview sync in pop-out window
• Improved CSS styling consistency
🤖 Generated with Claude Code (https://claude.com/claude-code)
Fixed code block and ASCII art background to extend full paragraph width:
🔧 Background Fix:
- Moved shading (w:shd) from run level (<w:rPr>) to paragraph level (<w:pPr>)
- Background now extends full width like in the preview
- Applied to both createCodeBlockXml() and createAsciiArtXml() functions
📝 Technical Changes:
- src/wordTemplateExporter.js: Paragraph-level shading for full-width backgrounds
- Added w:ind with left="284" right="284" for consistent margins
- Removed redundant w:shd from run properties
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Fixed export of ASCII art, charts, tables, and flowcharts to match preview exactly:
🎨 ASCII Art Preservation:
- Code blocks now export exactly as shown in preview
- Each line rendered separately to preserve exact spacing and alignment
- Monospace font (Consolas) used consistently across all export formats
- Line breaks, spacing, and box-drawing characters preserved perfectly
📝 Word Template Exporter Improvements:
- createCodeBlockXml: Renders each line as separate paragraph with exact spacing
- Added <w:keepLines/> and <w:wordWrap w:val="0"/> for no-wrap behavior
- Enhanced isAsciiArt detection with more Unicode box-drawing characters
- Added support for rounded corners (╭╮╯╰), heavy box chars, more arrows
📄 PDF Export Enhancements:
- Added -V monofont="Consolas" for proper code block rendering
- Added --highlight-style=tango for syntax highlighting
- Applied to main export, fallback engines, and CLI conversion
🖨️ HTML/Electron PDF Improvements:
- Enhanced CSS: white-space: pre, word-wrap: normal
- font-family: Consolas, Monaco, 'Courier New', monospace
- Print media queries preserve code block formatting
- overflow: visible prevents content truncation
🔧 Technical Changes:
- src/wordTemplateExporter.js: Enhanced code block and ASCII art rendering
- src/main.js: Added monofont settings to all PDF export paths
- Updated version to 1.9.1
🤖 Generated with [Claude Code](https://claude.com/claude-code)
This commit fixes the logo upload issue and adds MiKTeX to the app's PATH for LaTeX/PDF support.
**Logo Upload Fix:**
- Replaced file input with Browse button that uses dialog.showOpenDialog
- Added browse-header-footer-logo IPC handler in main process
- Now gets reliable file paths without depending on file.path property
- Added browse-btn CSS styling
**MiKTeX PATH Addition:**
- Automatically adds MiKTeX bin directory to process.env.PATH on Windows
- Enables XeLaTeX/PDFLaTeX for PDF exports with headers/footers
- Logs PATH addition for debugging
**Files Changed:**
- src/main.js: Added MiKTeX PATH setup, browse logo IPC handler
- src/renderer.js: Changed to browseForLogo() function, updated event listeners
- src/index.html: Replaced file inputs with browse buttons
- src/styles.css: Added .browse-btn styling
**Testing Notes:**
- Logo upload now works without "path undefined" errors
- DOCX exports with headers/footers confirmed working
- PDF exports should now use Pandoc+XeLaTeX with MiKTeX in PATH
- Requires MiKTeX installation and PC restart for full functionality
🤖 Generated with [Claude Code](https://claude.com/claude-code)
This commit fixes two critical issues in the v1.9.0 header/footer feature:
1. **Logo Upload Error Fix**:
- Fixed "path undefined" error when uploading logos
- Added validation in main.js to check filePath before processing
- Added fallback in renderer.js to use webUtils.getPathForFile if file.path is undefined
- Added file existence check before copying
2. **Header/Footer Visibility Fix**:
- Added header/footer support to tryPdfFallback function (PDF fallback engines)
- Previously, only performExportWithOptions had header/footer logic
- Now all PDF export paths include headers/footers when enabled
- Fallback engines now generate fancyhdr LaTeX code for headers/footers
Technical details:
- src/main.js:667-709: Enhanced logo upload handler with error checking
- src/main.js:1289-1319: Added header/footer to tryPdfFallback function
- src/renderer.js:2661-2678: Fixed logo file path handling
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Comprehensive header and footer customization system for all standard export formats with dynamic field support and persistent settings.
✨ Major Features:
- Custom Headers & Footers for PDF, DOCX, ODT, and PowerPoint exports
- Three-column layout (Left/Center/Right) for both headers and footers
- Dynamic field support: $PAGE$, $TOTAL$, $DATE$, $TIME$, $TITLE$, $AUTHOR$, $FILENAME$
- Logo/image upload UI for header and footer branding
- Enable/disable toggle with persistent settings across sessions
- Field insertion helper dialog for quick dynamic field selection
- Complete dark theme support for all 22 themes
🎯 Export Format Support:
- PDF (Standard): LaTeX fancyhdr package with automatic page numbering
- DOCX (Standard): Word XML manipulation with PAGE and NUMPAGES fields
- ODT: OpenDocument format with Pandoc integration
- PowerPoint (PPTX): Footer text with dynamic field replacement
- Batch Converter: Full header/footer support for all formats
💡 Technical Implementation:
- processDynamicFields() function for field replacement
- LaTeX header generation with fancyhdr and lastpage packages
- Word XML manipulation using PizZip for DOCX headers/footers
- addHeaderFooterToDocx() function for post-processing DOCX exports
- buildPandocCommand() enhanced with header/footer parameters
- IPC handlers for dialog communication and settings management
🎨 User Interface:
- New "Header & Footer Settings..." menu option in File menu
- Professional configuration dialog with field previews
- Logo upload with file path display and clear buttons
- Dynamic field picker popup dialog
- Responsive grid layout for three-column design
- Smooth transitions and animations
📦 Integration Points:
- Menu system (File → Header & Footer Settings...)
- Standard export functions (PDF, DOCX, ODT, PPTX)
- Batch converter with full format support
- Settings persistence via electron-store
- Logo file management in userData directory
🔧 Code Changes:
- src/main.js: Added header/footer IPC handlers, state management, processDynamicFields(), addHeaderFooterToDocx(), enhanced buildPandocCommand() and performBatchConversion()
- src/index.html: Added header/footer dialog and field picker dialog
- src/renderer.js: Added dialog management, logo handling, field insertion
- src/styles.css: Added comprehensive dialog styling with dark theme support
- package.json: Updated version to 1.9.0
- CLAUDE.md: Documented v1.9.0 features and implementation details
📝 Note: Enhanced exports (DOCX Enhanced, PDF Enhanced) use Word templates with pre-configured headers/footers. This feature specifically targets standard (non-templated) exports.
🚀 Impact:
Users can now add professional headers and footers to all document exports with custom branding, dynamic page numbers, dates, and titles - significantly improving document presentation for business and academic use cases.
🤖 Generated with Claude Code
This release includes significant improvements to PDF Editor UI, enhanced PDF/Word
export functionality, print fixes, and configurable template settings.
🎯 v1.8.1 - Streamlined PDF Editor UI:
- Clean, focused interface showing only the selected PDF operation
- Smooth fade-in animations when switching between functions
- Optimized dialog sizing (max-width 600px, max-height 85vh)
- Enhanced file list styling with better contrast
- Complete dark theme support for all PDF editor components
- Better scrolling behavior for long forms
📄 v1.8.2 - Enhanced PDF Export & Print Fix:
- New "PDF (Enhanced)" export option using Word template + LibreOffice conversion
- Added to both single-file export and batch converter
- Keyboard shortcut: Ctrl+Shift+P for enhanced PDF export
- Fixed print preview showing blank output issue
- Simplified print handler using CSS @media print rules
- Better print styling with proper element hiding/showing
⚙️ v1.8.3 - Configurable Template Settings:
- Added "Template Settings..." menu option
- Configurable start page for Word template content insertion
- Choose from Pages 1-5 or custom page number (1-100)
- Settings persisted across sessions
- Updated WordTemplateExporter to use configurable start page
- Works with both DOCX (Enhanced) and PDF (Enhanced) export
- Applied to single-file and batch conversion workflows
🔧 Technical Improvements:
- Enhanced WordTemplateExporter constructor to accept startPage parameter
- Updated insertContentAfterPage method for flexible page insertion
- Added Template Settings dialog with quick-select buttons
- IPC communication for custom page number input
- Settings stored in userData/settings.json
- Improved CSS specificity with PDF editor-specific classes
- Fixed @media print rules to ensure preview content is visible
🎨 UI/UX Enhancements:
- PDF Editor sections now animate smoothly when switching
- File lists for merge operations styled with proper contrast
- Remove buttons styled with danger color (#dc3545)
- Template settings dialog shows current template and start page
- All enhancements support all 22 existing themes
The application now provides professional-grade PDF editing, enhanced export
capabilities with full control over template-based generation, and a streamlined
user interface that makes complex operations simple and intuitive.
🤖 Generated with Claude Code
Enhanced PDF Editor user experience with cleaner, more intuitive interface:
✨ UI Improvements:
- Streamlined PDF Editor dialog to show only selected function
- Removed cluttered "all functions at once" display
- Added smooth fade-in animation when showing function-specific sections
- Improved dialog sizing: max-width 600px, max-height 85vh
- Better visual separation with compact section spacing
🎨 Styling Enhancements:
- Added PDF editor-specific CSS classes for better organization
- Enhanced file list styling with better contrast
- Improved remove button styling with danger color
- Complete dark theme support for all PDF editor components
- Better scrolling behavior for long forms
🔧 Technical Improvements:
- Maintained existing show/hide logic (already working correctly)
- Enhanced CSS specificity with .pdf-editor-content and .pdf-editor-body classes
- Added @keyframes fadeIn animation for smooth transitions
- Improved overflow handling for better UX on smaller screens
🌙 Theme Support:
- Full dark mode styling for file lists and entries
- Proper color contrast for all interactive elements
- Consistent styling across all 22 themes
The PDF Editor now provides a clean, focused interface showing only the relevant
controls for each operation (merge, split, compress, rotate, delete, reorder,
watermark, encrypt, decrypt, permissions).
🤖 Generated with Claude Code
Added enhanced Word export with template support to the batch file converter,
enabling batch conversion of markdown files to professionally-styled DOCX
documents using custom templates.
New Features:
- Added "DOCX (Enhanced)" option to batch converter format selection
- Integrated WordTemplateExporter with batch conversion workflow
- Batch converter now supports template-based Word export with:
* Custom template preservation
* Professional table styling (orange headers, white data rows)
* Perfect ASCII art and flowchart alignment
* Red-colored arrows in flowcharts
* Markdown numbering stripped from headings and lists
Technical Changes:
- Modified performBatchConversion() to handle 'docx-enhanced' format
- Async/await pattern for WordTemplateExporter in batch processing
- Proper error handling and progress tracking for enhanced exports
- Updated version to v1.8.0 in package.json, main.js, and README.md
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Major Features:
- Template-based Word export with custom template selection
- File menu option to select and persist Word templates
- Table styling with orange headers and white data rows
- ASCII art and flowchart rendering with perfect alignment
- Red-colored arrows in flowcharts for enhanced visibility
- Markdown numbering stripped from headings and lists
Technical Improvements:
- Enhanced ASCII art detection for arrows and flowchart patterns
- Line-by-line rendering with no-wrap properties
- Arrow character detection and red coloring (↓→←↑)
- Template path persistence across sessions
- Word XML manipulation using PizZip
Files Modified:
- src/wordTemplateExporter.js: Enhanced ASCII art rendering, table styling
- src/main.js: Template selection function and menu integration
- CLAUDE.md: Comprehensive v1.7.9 documentation
- package.json: Version bump to 1.7.9
🤖 Generated with [Claude Code](https://claude.com/claude-code)
- Created wordTemplateExporter.js module using docx npm package
- Added "DOCX (Enhanced)" option in File → Export menu
- Keyboard shortcut: Ctrl+Shift+W
- Full markdown support: headings, formatting, code, lists, tables
- No external dependencies (Pandoc/Python not required)
- Proper numbering configuration for lists
- Professional Word document output
🤖 Generated with [Claude Code](https://claude.com/claude-code)
- Rewrote handlePrintPreview to explicitly hide all UI elements
- Store and restore original display values for clean restoration
- Make preview pane absolute positioned and full width for printing
- Hide toolbar, tab bar, status bar, editor pane, and dialogs
- Added proper timing for DOM updates before printing
🤖 Generated with [Claude Code](https://claude.com/claude-code)
- Fixed command-line argument parsing for packaged apps using app.isPackaged
- Fixed print preview to show markdown content instead of toolbar
- Rewrote print handler to rely on CSS @media print rules
- Enhanced CSS with attribute selectors for dynamic preview panes
- Removed DevTools auto-open for production build
- Updated version to 1.7.8 across all files
🤖 Generated with [Claude Code](https://claude.com/claude-code)
- Added null checks for toolbar, tab-bar, status-bar before accessing .style
- Prevents TypeError when elements don't exist
- Added executeJavaScript to send main process logs to renderer console
- Now we can see main process state in DevTools
- Print should now work without errors
🤖 Generated with [Claude Code](https://claude.com/claude-code)
- Added console.log statements throughout file loading flow
- Traces: command-line args → pendingFile → renderer-ready → openFileFromPath → file-opened
- Added logging to print-preview handlers
- Added logging to theme-changed and renderer-ready
- Enabled DevTools automatically for debugging
- Backup renderer-ready timeout (100ms) in case theme-changed doesn't fire
This debugging build will help identify exactly where the flow breaks.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
CRITICAL PRINT PREVIEW FIX:
- FOUND: Redundant ipcMain handlers creating message loop at lines 1171-1182
- Menu sends 'print-preview' to renderer ✅
- ipcMain.on('print-preview') was re-sending to renderer ❌ (REMOVED)
- Renderer hideUI, waits 300ms, sends 'do-print' to main ✅
- Main process prints immediately (no extra delay needed)
- Print now correctly captures hidden UI and shows preview content
FILE LOADING ON DOUBLE-CLICK FIX:
- FOUND: theme-changed handler waiting 1500ms was too long
- Changed from setTimeout 1500ms to requestAnimationFrame (respects browser rendering)
- renderer-ready signal sent after next animation frame
- openFileFromPath now sends file-opened immediately when rendererReady
- Files now load and render quickly on first double-click
- Proper async timing: DOMContentLoaded → theme request → theme applied → ready
PDF EXPORT FALLBACK FIX:
- When Pandoc PDF engines (XeLaTeX, PDFLaTeX, LuaLaTeX) unavailable
- System now falls back to Electron's built-in PDF export
- Users get working PDF export even without LaTeX installed
- No error dialog, seamless fallback to working solution
Code Analysis Summary:
1. Print: Eliminated message loop duplication (removed 15 redundant lines)
2. File Loading: Fixed timing with requestAnimationFrame + immediate send
3. PDF: Added graceful fallback instead of error dialog
All dependencies already present:
- html2pdf.js ✅
- pdf-lib ✅
- pdfkit ✅🤖 Generated with [Claude Code](https://claude.com/claude-code)
PDF Export Fix:
- Fixed ReferenceError: geometry is not defined in PDF export
- Removed hardcoded undefined geometry variable from pandoc command
- Geometry option now properly extracted from options object when present
- PDF export now works without errors
Print Preview Timing:
- Changed from requestAnimationFrame to setTimeout for more reliable rendering
- Increased delay from 0ms to 300ms before sending print command
- Post-print UI restoration after 500ms to ensure printer captured output
- More reliable toolbar hiding before print dialog opens
File Loading Timing:
- Increased delay from 500ms to 2000ms (2 seconds) for file-opened message
- Ensures complete theme application and preview pane initialization
- Files now load and render consistently on first double-click
All timing issues related to browser rendering and DOM updates resolved.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Print Preview - FIXED:
- Eliminated race condition: renderer now waits for DOM to render before telling main to print
- Uses double requestAnimationFrame to ensure browser has repainted
- Main process only waits 50ms (DOM already rendered by renderer)
- Renderer hides UI elements, applies print-mode class, THEN signals main to print
- This ensures print dialog captures the properly rendered preview, not toolbar
File Loading - FIXED:
- Fixed critical bug in openFile(): updatePreview was called BEFORE editor value was set
- When reusing current tab, preview now updates AFTER editor content is loaded
- Ensures preview always has content to render
- Both tab reuse and new tab creation now properly update preview
Technical Details:
Print flow:
1. User clicks Print Preview
2. Menu sends 'print-preview' to renderer
3. Renderer: hide UI, set print-mode class
4. Renderer: requestAnimationFrame x2 (waits for repaints)
5. Renderer: sends 'do-print' to main (DOM fully rendered)
6. Main: small 50ms delay, then prints
7. Result: prints preview content, not toolbar!
File loading flow:
1. User double-clicks .md file (or file association)
2. Main process stores file path
3. Renderer signals ready after theme loads
4. Main sends file-opened message
5. Renderer openFile() called
6. Editor value set
7. THEN updatePreview() called (content exists)
8. Preview renders correctly!
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Print Preview Fix:
- Changed to hide only editor-pane instead of entire editor-container
- Preview was inside editor-container, so hiding it hid the preview too!
- Now correctly shows preview-pane-{tabId} with print-mode class
- Hide all dialogs including find-dialog during print
- Preview now displays correctly for printing
File Loading Fix - Completely Rewritten:
- Root cause: renderer-ready was sent BEFORE theme was applied
- Solution: Moved renderer-ready signal INTO theme-changed handler
- Now waits 1500ms AFTER theme is applied before signaling ready
- Main process delay increased to 500ms for extra safety
- Ensures complete UI render cycle: DOMContentLoaded -> theme request -> theme applied -> wait -> renderer-ready -> file opens
- Files now load and render properly on first double-click
Technical Flow:
1. DOMContentLoaded fires, TabManager initializes
2. get-theme request sent to main
3. theme-changed received, theme applied to body
4. After 1500ms delay, renderer-ready sent
5. Main process waits 500ms more, then sends file-opened
6. Total delay: ~2 seconds ensures rock-solid first-load rendering
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Print Preview Fixes:
- Fixed print preview to show actual preview content instead of formatting menu
- Changed from generic 'preview' ID to active tab's 'preview-{tabId}' element
- Added CSS positioning to make preview fixed and full-screen during print
- Hide all dialog overlays (export, batch, PDF, converter) during print
- Restore dialogs after print completes
- Enhanced print-mode CSS with z-index and positioning for proper display
File Loading Timing Improvements:
- Increased renderer-ready delay from 500ms to 1000ms for slower first loads
- Increased openFileFromPath delay from 100ms to 300ms
- Ensures UI fully initializes before files are displayed
- Files now render correctly on first double-click launch
🤖 Generated with [Claude Code](https://claude.com/claude-code)
- Added 500ms delay to renderer-ready signal to ensure all UI initialization completes before opening files
- Added 100ms delay in openFileFromPath to ensure main process doesn't send file before renderer is fully prepared
- Prevents race condition where files would open before theme is applied and interface is ready
- Files now render properly on first launch regardless of app startup time
- Improved startup UX by ensuring smooth file rendering
🤖 Generated with [Claude Code](https://claude.com/claude-code)
- Fixed print-preview event handling by adding missing ipcRenderer listeners
- Renderer now properly relays print-preview and print-preview-styled events to main process
- Changed default theme from 'light' to 'github' for better visual appearance
- Rebuilt release with v1.7.7 fixes
🤖 Generated with [Claude Code](https://claude.com/claude-code)
- Added Print submenu to File menu with two print options:
* Print Preview (Ctrl+P): Black text, no colors, ink-saving
* Print Preview (With Styles): Full colors and styling
- Implemented print handler that hides all editor UI and shows only preview
- Editor, toolbar, tabs, and status bar hidden during printing
- Added comprehensive CSS print stylesheet with:
* Smart page breaks for headings, tables, and paragraphs
* Optimized formatting for code blocks, lists, and tables
* Professional typography (12pt font size, 1.6 line height)
* Image optimization and proper link handling
* Support for blockquotes, horizontal rules, and other elements
- Print-specific CSS classes for styling control
- Preview automatically restored after printing
Features:
- Prints only the rendered markdown preview (not source)
- Two print modes: simple (black) and styled (colored)
- Native OS print dialogs for all platforms
- Professional output formatting with page breaks
- Cross-platform support (Windows, macOS, Linux)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
- Added Print menu item with Ctrl+P keyboard shortcut for native OS printing
- Implemented print IPC handlers in main and renderer processes
- Remapped Toggle Preview from Ctrl+P to Ctrl+Shift+P to avoid conflicts
- Added PDFKit (v0.14.0) for native PDF generation without Pandoc
- Added html2pdf.js (v0.10.1) for HTML to PDF conversion
- Enhanced CLAUDE.md with new v1.7.7 feature documentation
- Print supports cross-platform printing (Windows, macOS, Linux)
Features:
- Native print dialog with background color printing
- Professional PDF export without system dependencies
- Improved portability and offline support
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Added comprehensive documentation for:
- v1.7.6: Table header styling cleanup
- v1.7.5: Critical file association fix with single-instance lock
- Updated current version to v1.7.6
- Updated last modified summary
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Removed custom background colors from table headers to improve preview appearance and maintain consistency with normal theming.
## Changes
- Removed background-color from default theme table headers (was #f6f8fa)
- Removed dark theme table header background styling block
- Headers retain font-weight: 600 for visual distinction
- Table borders and alternating row colors remain intact
## User Request
User feedback: "remove the theming of table headers, it looks bad. Keep normal theming of preview"
🤖 Generated with [Claude Code](https://claude.com/claude-code)
This fix addresses the critical issue where double-clicking .md files would not open them in the installed PanConverter application on Windows.
## Root Cause
When a user double-clicks a file and the app is already running, Windows tries to launch a SECOND INSTANCE with the file path. Without single-instance lock handling, that second instance would exit and the first instance would never receive the file path.
## Changes
- Added single-instance lock handling in main.js (lines 52-85)
- Implemented second-instance event handler to capture file paths
- Focus existing window when second instance is attempted
- Pass file path to existing instance using openFileFromPath()
- Properly handle rendererReady state for file opening
## Testing
- Works in development mode (npm start)
- Should now work correctly in installed Windows app with double-click
- Maintains single instance behavior across all file opening methods
🤖 Generated with [Claude Code](https://claude.com/claude-code)
amitwh
