Fix v1.3.1: File associations and 50/50 pane layout

- Enhanced file association handling for double-clicking .md files - Added proper file associations in package.json build config - Fixed preview/source pane layout to be equally distributed 50/50 - Updated CSS for tab-content structure with proper flex layout - Added theme support for new pane selectors - Improved command line argument processing for file opening - Updated version to 1.3.1 with file association feature
Merge branch 'master' into macos
2026-08-02 18:10:18 +05:30 · 2025-09-01 21:05:01 +05:30 · 2025-09-01 20:58:00 +05:30 · 2025-09-01 20:54:47 +05:30 · 2025-09-01 20:53:36 +05:30 · 2025-09-01 20:53:29 +05:30
16 changed files with 2792 additions and 674 deletions
@@ -0,0 +1,18 @@
 node_modules/
 dist/
 *.log
 .DS_Store
 Thumbs.db
 .env
 .env.local
 *.swp
 *.swo
 *~
 .vscode/
 .idea/
 *.iml
 out/
 .cache/
 .npm/
 .electron/
 package-lock.json
@@ -0,0 +1,303 @@
 # PanConverter - Claude Development Guide
 ## Project Overview
 **PanConverter** is a cross-platform Markdown editor and converter powered by Pandoc, built with Electron. It provides professional-grade editing capabilities with comprehensive export options.
 **Current Version**: v1.2.1  
 **Author**: Amit Haridas (amit.wh@gmail.com)  
 **License**: MIT  
 **Repository**: https://github.com/amitwh/pan-converter
 ## Architecture & Technology Stack
 ### Core Technologies
 - **Electron** - Cross-platform desktop application framework
 - **Pandoc** - Universal document converter (required dependency)
 - **marked** - Markdown parsing and rendering
 - **highlight.js** - Syntax highlighting
 - **XLSX** - Spreadsheet export functionality
 - **DOMPurify** - HTML sanitization
 ### Application Structure
 ```
 src/
 ├── main.js        # Electron main process, menu system, IPC handlers
 ├── renderer.js    # UI logic, editor functionality, event handling
 ├── index.html     # Application layout and components
 └── styles.css     # Comprehensive styling with multi-theme support
 assets/
 └── icon.png       # Application icon
 package.json       # Dependencies and build configuration
 ```
 ## Development Commands
 ### Prerequisites
 ```bash
 # Install Node.js dependencies
 npm install
 # Install Pandoc (required for export functionality)
 # Ubuntu/Debian:
 sudo apt-get install pandoc
 # macOS:
 brew install pandoc
 # Windows: Download from https://pandoc.org/installing.html
 ```
 ### Running the Application
 ```bash
 # Start development server
 npm start
 # Start with debugging
 npm start --enable-logging
 ```
 ### Building & Packaging
 ```bash
 # Generate application icons
 npm run generate-icons
 # Build for current platform
 npm run build
 # Platform-specific builds
 npm run build:win      # Windows
 npm run build:mac      # macOS
 npm run build:linux    # Linux (AppImage, .deb, .snap)
 # Build for all platforms
 npm run dist:all
 ```
 ### Git Branch Management
 ```bash
 # Switch to platform-specific branches
 git checkout linux    # Linux development
 git checkout macos     # macOS development  
 git checkout windows   # Windows development
 git checkout master    # Main development branch
 # Update all branches with latest changes
 git checkout master
 git push origin master
 git checkout linux && git merge master && git push origin linux
 git checkout macos && git merge master && git push origin macos
 git checkout windows && git merge master && git push origin windows
 ```
 ### Release Management
 ```bash
 # Create and push release tag
 git tag v1.2.1 -m "Release message"
 git push origin v1.2.1
 # Create GitHub release with packages
 gh release create v1.2.1 --title "Title" --notes "Release notes" \
  "dist/PanConverter-1.2.1.AppImage" \
  "dist/pan-converter_1.2.1_amd64.deb" \
  "dist/pan-converter_1.2.1_amd64.snap"
 ```
 ## Feature Implementation Guide
 ### v1.2.1 Comprehensive Editor Enhancements
 #### ✨ Advanced Editor Features
 **Find & Replace System** (`src/renderer.js:200-350`)
 - Dialog-based interface with match highlighting
 - Forward/backward navigation through matches
 - Replace single or replace all functionality
 - Real-time match counting and status display
 - Escape key closes dialog
 **Line Numbers** (`src/renderer.js:450-500`, `src/styles.css:517-598`)
 - Toggle-able line numbers with toolbar button
 - Synchronized scrolling with editor content
 - Theme-aware styling for all supported themes
 - Dynamic line number generation based on content
 **Undo/Redo System** (`src/renderer.js:100-150`)
 - Stack-based state management for editor history
 - Keyboard shortcuts: `Ctrl/Cmd+Z` (undo), `Ctrl/Cmd+Shift+Z` (redo)
 - Intelligent state saving on text changes
 - Memory-efficient history management
 **Smart Auto-Indentation** (`src/renderer.js:350-400`)
 - Automatic list continuation on Enter key
 - Proper indentation handling for nested lists
 - Support for ordered and unordered lists
 - Intelligent whitespace management
 **Enhanced Keyboard Shortcuts** (`src/renderer.js:400-450`)
 - `Tab`/`Shift+Tab` for line indentation/outdentation
 - `Enter` for auto-continuing lists
 - `Ctrl/Cmd+F` for find & replace dialog
 - `Escape` for closing dialogs
 **Word/Character Count** (`src/renderer.js:500-530`)
 - Live counting displayed in status bar
 - Updates automatically as content changes
 - Word and character statistics
 #### 📤 Export & Conversion Features
 **PowerPoint Export** (`src/main.js:330-350`)
 - Convert markdown to PPTX presentations
 - Automatic slide-level formatting (`--slide-level=2`)
 - Smart presentation structure handling
 **Spreadsheet Export** (`src/main.js:370-457`)
 - Export markdown tables to Excel (XLSX/XLS) and ODS formats
 - Multi-table support with separate worksheets
 - Automatic table detection and parsing
 - Error handling for files without tables
 **Document Import** (`src/main.js:280-315`)
 - Import DOCX, ODT, RTF, HTML, PDF, PPTX, ODP files
 - Automatic conversion to markdown format
 - File dialog with appropriate filters
 - Success notifications and error handling
 **Table Creation Helper** (`src/renderer.js:600-650`)
 - Built-in table generator with row/column specification
 - Automatic markdown table formatting
 - Proper header separation and alignment
 #### 🎨 Interface & Theming
 **Multi-Theme Support** (`src/styles.css:214-598`)
 - Light, Dark, Solarized, Monokai, GitHub themes
 - Complete theming for all UI components
 - Theme-aware styling for new features (find dialog, line numbers)
 - Persistent theme selection with local storage
 **Enhanced UI Components** (`src/index.html:94-108`)
 - Find & replace dialog with modern styling
 - Toolbar buttons for all new features
 - Status bar with live statistics
 - Responsive layout with proper spacing
 ## File Structure & Key Components
 ### Main Process (`src/main.js`)
 - **Menu System**: Comprehensive menu with file operations, editing, conversion, view options
 - **IPC Handlers**: Communication between main and renderer processes
 - **File Operations**: Open, save, import/export functionality
 - **Theme Management**: Persistent theme storage and application
 - **Spreadsheet Export**: Table extraction and XLSX generation
 - **About Dialog**: Application information and feature list
 ### Renderer Process (`src/renderer.js`)
 - **Editor Initialization**: CodeMirror-like functionality with custom implementation
 - **Find & Replace Engine**: Search algorithms with regex support
 - **Undo/Redo Manager**: History stack management
 - **Auto-indentation Logic**: Smart list continuation
 - **Live Preview**: Real-time markdown rendering with DOMPurify
 - **Event Handling**: Keyboard shortcuts and UI interactions
 - **Statistics Tracking**: Word/character counting
 ### Styling (`src/styles.css`)
 - **Base Styles**: Application layout and typography
 - **Component Styles**: Toolbar, editor, preview, dialogs
 - **Theme Implementations**: Complete styling for all themes
 - **Responsive Design**: Flexible layouts and proper spacing
 - **Animation Support**: Smooth transitions and hover effects
 ### HTML Structure (`src/index.html`)
 - **Toolbar**: Feature buttons with SVG icons
 - **Find Dialog**: Search and replace interface
 - **Editor Container**: Line numbers and text editor
 - **Preview Pane**: Rendered markdown display
 - **Status Bar**: Statistics and application status
 ## Testing & Quality Assurance
 ### Manual Testing Checklist
 - [ ] All keyboard shortcuts work correctly
 - [ ] Find & replace functions properly with edge cases
 - [ ] Line numbers sync correctly with content
 - [ ] Undo/redo preserves cursor position
 - [ ] Auto-indentation works with various list types
 - [ ] All themes render correctly for new components
 - [ ] Export functions work with various document formats
 - [ ] Table creation and export functionality
 - [ ] Cross-platform compatibility
 ### Known Issues & Limitations
 - AppImage may require `--no-sandbox` flag on some Linux systems
 - Large files (>1MB) may cause performance issues
 - Windows/Mac builds require platform-specific environments
 - Pandoc must be installed separately for export functionality
 ## Deployment & Distribution
 ### Release Packages
 - **Linux AppImage**: Universal Linux package (self-contained)
 - **Debian Package**: `.deb` for Ubuntu/Debian systems
 - **Snap Package**: Universal Linux package via Snap Store
 - **Future**: Windows `.exe` and macOS `.dmg` packages
 ### Release Process
 1. Update version in `package.json`, `src/main.js`, and `README.md`
 2. Commit changes and push to all platform branches
 3. Build platform-specific packages
 4. Create Git tag and GitHub release
 5. Upload packages to GitHub release
 6. Update documentation and announce release
 ## Contributing Guidelines
 ### Code Style
 - Use consistent indentation (2 spaces)
 - Follow JavaScript ES6+ standards
 - Comment complex functionality
 - Maintain separation between main and renderer processes
 - Use descriptive variable and function names
 ### Adding New Features
 1. Plan feature implementation and UI integration
 2. Update relevant files (main.js, renderer.js, styles.css)
 3. Test across all supported themes
 4. Update documentation and README
 5. Test on multiple platforms if possible
 6. Submit pull request with detailed description
 ### Bug Reporting
 - Include steps to reproduce
 - Specify platform and version information
 - Attach relevant screenshots or error logs
 - Check existing issues before creating new ones
 ## Future Roadmap
 ### Planned Features
 - [ ] Collaborative editing capabilities
 - [ ] Plugin system for extensions
 - [ ] Advanced markdown extensions (math, diagrams)
 - [ ] Cloud synchronization options
 - [ ] Mobile companion app
 - [ ] Advanced export templates
 - [ ] Spell check and grammar checking
 - [ ] Version control integration
 ### Technical Improvements
 - [ ] Performance optimization for large files
 - [ ] Memory usage optimization
 - [ ] Startup time improvements
 - [ ] Better error handling and user feedback
 - [ ] Automated testing suite
 - [ ] Continuous integration/deployment
 ---
 **Last Updated**: September 1, 2025  
 **Claude Assistant**: Development completed for v1.2.1 comprehensive editor enhancements
@@ -1,674 +0,0 @@
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  Termination of your rights under this section does not terminate the
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 reinstated, you do not qualify to receive new licenses for the same
 material under section 10.
  9. Acceptance Not Required for Having Copies.
  You are not required to accept this License in order to receive or
 run a copy of the Program.  Ancillary propagation of a covered work
 occurring solely as a consequence of using peer-to-peer transmission
 to receive a copy likewise does not require acceptance.  However,
 nothing other than this License grants you permission to propagate or
 modify any covered work.  These actions infringe copyright if you do
 not accept this License.  Therefore, by modifying or propagating a
 covered work, you indicate your acceptance of this License to do so.
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  You may not impose any further restrictions on the exercise of the
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  11. Patents.
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 work thus licensed is called the contributor's "contributor version".
  A contributor's "essential patent claims" are all patent claims
 owned or controlled by the contributor, whether already acquired or
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 but do not include claims that would be infringed only as a
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  In the following three paragraphs, a "patent license" is any express
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  If you convey a covered work, knowingly relying on a patent license,
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 then you must either (1) cause the Corresponding Source to be so
 available, or (2) arrange to deprive yourself of the benefit of the
 patent license for this particular work, or (3) arrange, in a manner
 consistent with the requirements of this License, to extend the patent
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  If, pursuant to or in connection with a single transaction or
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 you grant is automatically extended to all recipients of the covered
 work and works based on it.
  A patent license is "discriminatory" if it does not include within
 the scope of its coverage, prohibits the exercise of, or is
 conditioned on the non-exercise of one or more of the rights that are
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 in the business of distributing software, under which you make payment
 to the third party based on the extent of your activity of conveying
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 or that patent license was granted, prior to 28 March 2007.
  Nothing in this License shall be construed as excluding or limiting
 any implied license or other defenses to infringement that may
 otherwise be available to you under applicable patent law.
  12. No Surrender of Others' Freedom.
  If conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
 excuse you from the conditions of this License.  If you cannot convey a
 covered work so as to satisfy simultaneously your obligations under this
 License and any other pertinent obligations, then as a consequence you may
 not convey it at all.  For example, if you agree to terms that obligate you
 to collect a royalty for further conveying from those to whom you convey
 the Program, the only way you could satisfy both those terms and this
 License would be to refrain entirely from conveying the Program.
  13. Use with the GNU Affero General Public License.
  Notwithstanding any other provision of this License, you have
 permission to link or combine any covered work with a work licensed
 under version 3 of the GNU Affero General Public License into a single
 combined work, and to convey the resulting work.  The terms of this
 License will continue to apply to the part which is the covered work,
 but the special requirements of the GNU Affero General Public License,
 section 13, concerning interaction through a network will apply to the
 combination as such.
  14. Revised Versions of this License.
  The Free Software Foundation may publish revised and/or new versions of
 the GNU General Public License from time to time.  Such new versions will
 be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
  Each version is given a distinguishing version number.  If the
 Program specifies that a certain numbered version of the GNU General
 Public License "or any later version" applies to it, you have the
 option of following the terms and conditions either of that numbered
 version or of any later version published by the Free Software
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 by the Free Software Foundation.
  If the Program specifies that a proxy can decide which future
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 public statement of acceptance of a version permanently authorizes you
 to choose that version for the Program.
  Later license versions may give you additional or different
 permissions.  However, no additional obligations are imposed on any
 author or copyright holder as a result of your choosing to follow a
 later version.
  15. Disclaimer of Warranty.
  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
 APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
  16. Limitation of Liability.
  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
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 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGES.
  17. Interpretation of Sections 15 and 16.
  If the disclaimer of warranty and limitation of liability provided
 above cannot be given local legal effect according to their terms,
 reviewing courts shall apply local law that most closely approximates
 an absolute waiver of all civil liability in connection with the
 Program, unless a warranty or assumption of liability accompanies a
 copy of the Program in return for a fee.
                     END OF TERMS AND CONDITIONS
            How to Apply These Terms to Your New Programs
  If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.
  To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
 state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 Also add information on how to contact you by electronic and paper mail.
  If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.
 The hypothetical commands `show w' and `show c' should show the appropriate
 parts of the General Public License.  Of course, your program's commands
 might be different; for a GUI interface, you would use an "about box".
  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
 <https://www.gnu.org/licenses/>.
  The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <https://www.gnu.org/licenses/why-not-lgpl.html>.
@@ -0,0 +1,95 @@
 # Push Instructions for Pan Converter
 ## Prerequisites
 1. Create a new repository on GitHub: https://github.com/new
   - Repository name: `pan-converter`
   - Keep it empty (no README, .gitignore, or license)
   - Make it public or private as desired
 2. Set up authentication:
   - **Option A - SSH Key** (Recommended):
     ```bash
     # Check if you have SSH key
     ls -la ~/.ssh/id_rsa.pub
     # If not, generate one:
     ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
     # Add to GitHub: Settings > SSH and GPG keys > New SSH key
     cat ~/.ssh/id_rsa.pub
     ```
   - **Option B - Personal Access Token**:
     - Go to GitHub Settings > Developer settings > Personal access tokens
     - Generate new token with 'repo' scope
     - Save the token securely
 ## Push Commands
 ### Using SSH (Recommended)
 ```bash
 # Set SSH remote
 git remote set-url origin git@github.com:amitwh/pan-converter.git
 # Push all branches
 git push -u origin master
 git push origin linux
 git push origin macos
 git push origin windows
 ```
 ### Using HTTPS with Token
 ```bash
 # Set HTTPS remote
 git remote set-url origin https://github.com/amitwh/pan-converter.git
 # Push all branches (you'll be prompted for username and token)
 git push -u origin master
 git push origin linux
 git push origin macos
 git push origin windows
 # When prompted:
 # Username: amitwh
 # Password: [paste your Personal Access Token]
 ```
 ### Using GitHub CLI (if installed)
 ```bash
 # Login to GitHub CLI
 gh auth login
 # Create repo and push
 gh repo create pan-converter --public --source=. --remote=origin --push
 ```
 ## Automated Script
 ```bash
 # Run the provided script
 ./push-to-github.sh
 ```
 ## Verify Success
 After pushing, verify at: https://github.com/amitwh/pan-converter
 You should see:
 - 4 branches (master, linux, macos, windows)
 - All project files
 - Complete commit history
 ## Troubleshooting
 ### Authentication Failed
 - For SSH: Ensure your SSH key is added to GitHub
 - For HTTPS: Use Personal Access Token, not password
 - Check token has 'repo' scope
 ### Repository Not Found
 - Ensure repository exists on GitHub
 - Check spelling: `pan-converter`
 - Verify you're logged into the correct GitHub account
 ### Permission Denied
 - Check repository ownership
 - Ensure you have write access
 - Verify authentication method is correct
@@ -0,0 +1,166 @@
 # PanConverter
 A cross-platform Markdown editor and converter powered by Pandoc.
 ![PanConverter](assets/icon.png)
 ## Features
 ### ✨ Advanced Markdown Editor
 - 🗂️ **Tabbed Interface** - Work with multiple files simultaneously in separate tabs
 - 📝 **Rich Text Editor** - Full-featured editor with syntax highlighting and comprehensive toolbar
 - 🔍 **Find & Replace** - Powerful search and replace with match highlighting and navigation
 - 🔢 **Line Numbers** - Toggle line numbers for easier code editing and navigation
 - ↩️ **Smart Auto-Indentation** - Automatic list continuation and intelligent indentation
 - ⏪ **Undo/Redo** - Full undo/redo support with keyboard shortcuts
 - ⌨️ **Advanced Shortcuts** - Tab indentation, line selection, and smart text formatting
 - 📂 **File Association Support** - Open markdown files directly from file manager
 ### 🎨 Themes & Interface
 - 👁️ **Live Preview** - See your markdown rendered in real-time with synchronized scrolling
 - 🎨 **Multiple Themes** - Choose from Light, Dark, Solarized, Monokai, or GitHub themes
 - 💾 **Auto-Save** - Never lose your work with automatic saving every 30 seconds
 ### 📤 Export & Conversion
 - 📄 **Enhanced PDF Export** - Robust PDF generation with multiple LaTeX engine fallbacks (XeLaTeX, PDFLaTeX, wkhtmltopdf)
 - 📄 **Document Export** - Convert to HTML, DOCX, LaTeX, RTF, ODT, EPUB, PowerPoint (PPTX), and OpenDocument Presentation (ODP)
 - 📊 **Spreadsheet Export** - Export markdown tables to Excel (XLSX/XLS) and OpenDocument Spreadsheet (ODS) formats
 - 📥 **Document Import** - Import DOCX, ODT, RTF, HTML, PDF, and presentation files to markdown
 - 📋 **Table Creation Helper** - Built-in table generator for easy markdown table creation
 ### 🖥️ Platform Support
 - **Cross-Platform** - Works seamlessly on Windows, macOS, and Linux
 ## Installation
 ### Prerequisites
 - [Pandoc](https://pandoc.org/installing.html) must be installed for export functionality
  - **Ubuntu/Debian**: `sudo apt-get install pandoc`
  - **macOS**: `brew install pandoc`
  - **Windows**: Download installer from Pandoc website
 ### PDF Export Requirements
 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-1.3.0.AppImage` (universal, may require `--no-sandbox` flag)
 - **Debian Package**: `pan-converter_1.3.0_amd64.deb`
 - **Snap Package**: `pan-converter_1.3.0_amd64.snap`
 ### Install from Source
 ```bash
 git clone https://github.com/amitwh/pan-converter.git
 cd pan-converter
 npm install
 npm start
 ```
 ## Usage
 ### Basic Workflow
 1. **Write** - Use the editor to write your Markdown content
 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
 - **Documents**: HTML, PDF, DOCX, LaTeX, RTF, ODT, EPUB
 - **Presentations**: PowerPoint (PPTX), OpenDocument Presentation (ODP)
 - **Spreadsheets**: Excel (XLSX/XLS), OpenDocument Spreadsheet (ODS)
 ### 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
 - `Ctrl/Cmd + N` - New file/tab
 - `Ctrl/Cmd + T` - New tab
 - `Ctrl/Cmd + W` - Close current tab
 - `Ctrl/Cmd + Tab` - Switch to next tab
 - `Ctrl/Cmd + O` - Open file
 - `Ctrl/Cmd + S` - Save file
 - `Ctrl/Cmd + Shift + S` - Save as
 - `Ctrl/Cmd + I` - Import document
 ### Editor Features
 - `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
 - `Ctrl/Cmd + P` - Toggle preview
 - `Ctrl/Cmd + Enter` - Toggle preview (alternative)
 - `Escape` - Close find dialog
 ## Building
 ```bash
 # Install dependencies
 npm install
 # Generate icons
 npm run generate-icons
 # Build for current platform
 npm run build
 # Build for specific platform
 npm run build:win    # Windows
 npm run build:mac    # macOS  
 npm run build:linux  # Linux (generates .deb, .AppImage, and .snap)
 # Build for all platforms
 npm run dist:all
 ```
 ## Version History
 - **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
 MIT License - see LICENSE file for details.
 ## Author
 **Amit Haridas** - [amit.wh@gmail.com](mailto:amit.wh@gmail.com)
 ## Acknowledgments
 - Built with [Electron](https://www.electronjs.org/)
 - 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 +1,8 @@
 <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 +1,91 @@
 {
  "name": "pan-converter",
  "version": "1.3.1",
  "description": "Cross-platform Markdown editor and converter using Pandoc",
  "main": "src/main.js",
  "scripts": {
    "start": "electron .",
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "electron-builder",
    "build:win": "electron-builder --win",
    "build:mac": "electron-builder --mac",
    "build:linux": "electron-builder --linux",
    "dist": "electron-builder --publish=never",
    "dist:all": "electron-builder -mwl",
    "generate-icons": "node scripts/generate-icons.js"
  },
  "keywords": [
    "markdown",
    "pandoc",
    "converter",
    "editor"
  ],
  "author": "Amit Haridas <amit.wh@gmail.com>",
  "license": "MIT",
  "devDependencies": {
    "electron": "^37.4.0",
    "electron-builder": "^26.0.12",
    "sharp": "^0.34.3"
  },
  "dependencies": {
    "codemirror": "^6.0.2",
    "dompurify": "^3.2.6",
    "electron-store": "^10.1.0",
    "highlight.js": "^11.11.1",
    "marked": "^16.2.1",
    "xlsx": "^0.18.5"
  },
  "build": {
    "appId": "com.panconverter.app",
    "productName": "PanConverter",
    "directories": {
      "output": "dist"
    },
    "files": [
      "src/**/*",
      "assets/**/*",
      "node_modules/**/*",
      "package.json"
    ],
    "fileAssociations": [
      {
        "ext": "md",
        "name": "Markdown Document",
        "description": "Markdown Document",
        "mimeType": "text/markdown",
        "role": "Editor"
      },
      {
        "ext": "markdown",
        "name": "Markdown Document",
        "description": "Markdown Document", 
        "mimeType": "text/markdown",
        "role": "Editor"
      }
    ],
    "mac": {
      "category": "public.app-category.productivity",
      "icon": "assets/icon.icns"
    },
    "win": {
      "target": "nsis",
      "icon": "assets/icon.ico"
    },
    "linux": {
      "target": [
        "deb",
        "AppImage",
        "snap"
      ],
      "category": "Utility",
      "icon": "assets/icon.png"
    },
    "deb": {
      "depends": [
        "pandoc"
      ],
      "description": "Markdown editor and converter using Pandoc",
      "maintainer": "Amit Haridas <amit.wh@gmail.com>"
    }
  }
 }
@@ -0,0 +1,83 @@
 #!/bin/bash
 echo "=========================================="
 echo "Pan Converter - GitHub Push Helper"
 echo "=========================================="
 echo ""
 echo "Before running this script, please ensure:"
 echo "1. You have created a repository named 'pan-converter' on GitHub"
 echo "2. The repository is empty (no README, .gitignore, or license)"
 echo "3. You have set up authentication (SSH key or Personal Access Token)"
 echo ""
 read -p "Have you completed the above steps? (y/n): " -n 1 -r
 echo ""
 if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    echo "Please complete the setup first:"
    echo "1. Go to https://github.com/new"
    echo "2. Create a new repository named 'pan-converter'"
    echo "3. DO NOT initialize with README, .gitignore, or license"
    echo "4. Set up SSH key or Personal Access Token for authentication"
    exit 1
 fi
 echo ""
 echo "Choose authentication method:"
 echo "1. SSH (Recommended if you have SSH keys set up)"
 echo "2. HTTPS (Requires Personal Access Token)"
 read -p "Enter your choice (1 or 2): " AUTH_CHOICE
 if [ "$AUTH_CHOICE" = "1" ]; then
    echo "Using SSH authentication..."
    git remote set-url origin git@github.com:amitwh/pan-converter.git
 elif [ "$AUTH_CHOICE" = "2" ]; then
    echo "Using HTTPS authentication..."
    echo "You'll need to enter your GitHub username and Personal Access Token"
    git remote set-url origin https://github.com/amitwh/pan-converter.git
 else
    echo "Invalid choice. Exiting."
    exit 1
 fi
 echo ""
 echo "Pushing branches to GitHub..."
 echo "=============================="
 # Push master branch with upstream tracking
 echo "Pushing master branch..."
 if git push -u origin master; then
    echo "✓ Master branch pushed successfully"
 else
    echo "✗ Failed to push master branch"
    echo "Please check your authentication and try again"
    exit 1
 fi
 # Push other branches
 echo "Pushing linux branch..."
 if git push origin linux; then
    echo "✓ Linux branch pushed successfully"
 else
    echo "✗ Failed to push linux branch"
 fi
 echo "Pushing macos branch..."
 if git push origin macos; then
    echo "✓ macOS branch pushed successfully"
 else
    echo "✗ Failed to push macos branch"
 fi
 echo "Pushing windows branch..."
 if git push origin windows; then
    echo "✓ Windows branch pushed successfully"
 else
    echo "✗ Failed to push windows branch"
 fi
 echo ""
 echo "=========================================="
 echo "Push complete!"
 echo "Your repository is available at:"
 echo "https://github.com/amitwh/pan-converter"
 echo "=========================================="
@@ -0,0 +1,43 @@
 const sharp = require('sharp');
 const fs = require('fs');
 const path = require('path');
 const sizes = {
    'icon.png': 512,
    'icon@2x.png': 1024,
    'icon.ico': 256,
    'icon.icns': 512
 };
 const svgPath = path.join(__dirname, '..', 'assets', 'icon.svg');
 const svgBuffer = fs.readFileSync(svgPath);
 async function generateIcons() {
    for (const [filename, size] of Object.entries(sizes)) {
        const outputPath = path.join(__dirname, '..', 'assets', filename);
        if (filename.endsWith('.png')) {
            await sharp(svgBuffer)
                .resize(size, size)
                .png()
                .toFile(outputPath);
            console.log(`Generated ${filename}`);
        } else if (filename.endsWith('.ico')) {
            // For ICO, we'll just use the PNG version
            await sharp(svgBuffer)
                .resize(size, size)
                .png()
                .toFile(outputPath.replace('.ico', '.png'));
            console.log(`Generated ${filename.replace('.ico', '.png')} (use png2ico to convert)`);
        } else if (filename.endsWith('.icns')) {
            // For ICNS, we'll just use the PNG version
            await sharp(svgBuffer)
                .resize(size, size)
                .png()
                .toFile(outputPath.replace('.icns', '.png'));
            console.log(`Generated ${filename.replace('.icns', '.png')} (use png2icns to convert)`);
        }
    }
 }
 generateIcons().catch(console.error);
@@ -0,0 +1,37 @@
 #!/bin/bash
 # Pan Converter - Git Remote Setup Script
 # 
 # Instructions:
 # 1. Create a new repository on GitHub named "pan-converter"
 # 2. Replace YOUR_GITHUB_USERNAME with your actual GitHub username
 # 3. Run this script: bash setup-upstream.sh
 GITHUB_USERNAME="amitwh"
 REPO_NAME="pan-converter"
 echo "Setting up remote repository..."
 # Add remote origin
 git remote add origin "https://github.com/$GITHUB_USERNAME/$REPO_NAME.git"
 echo "Pushing all branches to remote..."
 # Push master branch
 git push -u origin master
 # Push platform-specific branches
 git push origin linux
 git push origin macos  
 git push origin windows
 echo "Repository setup complete!"
 echo ""
 echo "Your repository is now available at:"
 echo "https://github.com/$GITHUB_USERNAME/$REPO_NAME"
 echo ""
 echo "Branch structure:"
 echo "  - master (main development)"
 echo "  - linux (Linux-specific)"
 echo "  - macos (macOS-specific)"
 echo "  - windows (Windows-specific)"
@@ -0,0 +1,139 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>PanConverter - Markdown Editor</title>
    <link rel="stylesheet" href="styles.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/6.65.7/codemirror.min.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css">
 </head>
 <body>
    <div class="container">
        <div class="tab-bar" id="tab-bar">
            <div class="tab active" data-tab-id="1">
                <span class="tab-title">Untitled</span>
                <button class="tab-close" title="Close tab">×</button>
            </div>
            <button class="new-tab-button" id="new-tab-btn" title="New tab">+</button>
        </div>
        <div class="toolbar">
            <button id="btn-bold" title="Bold">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <path d="M6 4h8a4 4 0 0 1 4 4 4 4 0 0 1-4 4H6z"></path>
                    <path d="M6 12h9a4 4 0 0 1 4 4 4 4 0 0 1-4 4H6z"></path>
                </svg>
            </button>
            <button id="btn-italic" title="Italic">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <line x1="19" y1="4" x2="10" y2="4"></line>
                    <line x1="14" y1="20" x2="5" y2="20"></line>
                    <line x1="15" y1="4" x2="9" y2="20"></line>
                </svg>
            </button>
            <button id="btn-heading" title="Heading">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <polyline points="4 7 4 4 20 4 20 7"></polyline>
                    <line x1="9" y1="20" x2="15" y2="20"></line>
                    <line x1="12" y1="4" x2="12" y2="20"></line>
                </svg>
            </button>
            <button id="btn-link" title="Link">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path>
                    <path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path>
                </svg>
            </button>
            <button id="btn-code" title="Code">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <polyline points="16 18 22 12 16 6"></polyline>
                    <polyline points="8 6 2 12 8 18"></polyline>
                </svg>
            </button>
            <button id="btn-list" title="List">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <line x1="8" y1="6" x2="21" y2="6"></line>
                    <line x1="8" y1="12" x2="21" y2="12"></line>
                    <line x1="8" y1="18" x2="21" y2="18"></line>
                    <line x1="3" y1="6" x2="3.01" y2="6"></line>
                    <line x1="3" y1="12" x2="3.01" y2="12"></line>
                    <line x1="3" y1="18" x2="3.01" y2="18"></line>
                </svg>
            </button>
            <button id="btn-quote" title="Quote">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <path d="M3 21c3 0 7-1 7-8V5c0-1.25-.756-2.017-2-2H4c-1.25 0-2 .75-2 1.972V11c0 1.25.75 2 2 2 1 0 1 0 1 1v1c0 1-1 2-2 2s-1 .008-1 1.031V20c0 1 0 1 1 1z"></path>
                    <path d="M15 21c3 0 7-1 7-8V5c0-1.25-.757-2.017-2-2h-4c-1.25 0-2 .75-2 1.972V11c0 1.25.75 2 2 2h.75c0 2.25.25 4-2.75 4v3c0 1 0 1 1 1z"></path>
                </svg>
            </button>
            <button id="btn-table" title="Insert Table">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <rect x="3" y="3" width="18" height="18" rx="2" ry="2"></rect>
                    <line x1="3" y1="9" x2="21" y2="9"></line>
                    <line x1="3" y1="15" x2="21" y2="15"></line>
                    <line x1="9" y1="3" x2="9" y2="21"></line>
                    <line x1="15" y1="3" x2="15" y2="21"></line>
                </svg>
            </button>
            <div class="toolbar-separator"></div>
            <button id="btn-find" title="Find & Replace (Ctrl+F)">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <circle cx="11" cy="11" r="8"></circle>
                    <path d="m21 21-4.35-4.35"></path>
                </svg>
            </button>
            <button id="btn-line-numbers" title="Toggle Line Numbers">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <path d="M3 6h18"></path>
                    <path d="M3 12h18"></path>
                    <path d="M3 18h18"></path>
                </svg>
            </button>
            <div class="toolbar-separator"></div>
            <button id="btn-preview-toggle" title="Toggle Preview">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <path d="M1 12s4-8 11-8 11 8 11 8-4 8-11 8-11-8-11-8z"></path>
                    <circle cx="12" cy="12" r="3"></circle>
                </svg>
            </button>
        </div>
        <!-- Find & Replace Dialog -->
        <div id="find-dialog" class="find-dialog hidden">
            <div class="find-controls">
                <input type="text" id="find-input" placeholder="Find...">
                <input type="text" id="replace-input" placeholder="Replace...">
                <button id="btn-find-prev" title="Previous">↑</button>
                <button id="btn-find-next" title="Next">↓</button>
                <button id="btn-replace" title="Replace">Replace</button>
                <button id="btn-replace-all" title="Replace All">All</button>
                <button id="btn-find-close" title="Close">×</button>
            </div>
            <div class="find-info">
                <span id="find-count">0 matches</span>
            </div>
        </div>
        <div class="editor-container">
            <div class="tab-content active" id="tab-content-1" data-tab-id="1">
                <div id="editor-pane-1" class="pane">
                    <div class="editor-wrapper">
                        <div id="line-numbers-1" class="line-numbers hidden"></div>
                        <textarea id="editor-1" class="editor-textarea"></textarea>
                    </div>
                </div>
                <div id="preview-pane-1" class="pane">
                    <div id="preview-1" class="preview-content"></div>
                </div>
            </div>
        </div>
        <div class="status-bar">
            <span id="status-text">Ready</span>
            <span id="word-count">Words: 0 | Characters: 0</span>
        </div>
    </div>
    <script src="renderer.js"></script>
 </body>
 </html>
@@ -0,0 +1,499 @@
 const { app, BrowserWindow, Menu, dialog, ipcMain, shell } = require('electron');
 const path = require('path');
 const fs = require('fs');
 const { exec } = require('child_process');
 const XLSX = require('xlsx');
 // Simple storage implementation to replace electron-store
 const settingsPath = path.join(app.getPath('userData'), 'settings.json');
 const store = {
  get: (key, defaultValue) => {
    try {
      const data = fs.readFileSync(settingsPath, 'utf-8');
      const settings = JSON.parse(data);
      return settings[key] || defaultValue;
    } catch {
      return defaultValue;
    }
  },
  set: (key, value) => {
    let settings = {};
    try {
      const data = fs.readFileSync(settingsPath, 'utf-8');
      settings = JSON.parse(data);
    } catch {}
    settings[key] = value;
    fs.writeFileSync(settingsPath, JSON.stringify(settings, null, 2));
  }
 };
 let mainWindow;
 let currentFile = null; // This will now represent the active tab's file
 function createWindow() {
  mainWindow = new BrowserWindow({
    width: 1200,
    height: 800,
    webPreferences: {
      nodeIntegration: true,
      contextIsolation: false
    },
    icon: path.join(__dirname, '../assets/icon.png')
  });
  mainWindow.loadFile(path.join(__dirname, 'index.html'));
  createMenu();
  mainWindow.on('closed', () => {
    mainWindow = null;
  });
  // Handle pending file from file association
  if (app.pendingFile) {
    mainWindow.webContents.once('dom-ready', () => {
      openFileFromPath(app.pendingFile);
      app.pendingFile = null;
    });
  }
 }
 function createMenu() {
  const template = [
    {
      label: 'File',
      submenu: [
        {
          label: 'New',
          accelerator: 'CmdOrCtrl+N',
          click: () => mainWindow.webContents.send('file-new')
        },
        {
          label: 'Open',
          accelerator: 'CmdOrCtrl+O',
          click: openFile
        },
        {
          label: 'Save',
          accelerator: 'CmdOrCtrl+S',
          click: () => mainWindow.webContents.send('file-save')
        },
        {
          label: 'Save As',
          accelerator: 'CmdOrCtrl+Shift+S',
          click: saveAsFile
        },
        { type: 'separator' },
        {
          label: 'Import Document...',
          accelerator: 'CmdOrCtrl+I',
          click: importDocument
        },
        {
          label: 'Export',
          submenu: [
            { label: 'HTML', click: () => exportFile('html') },
            { label: 'PDF', click: () => exportFile('pdf') },
            { label: 'DOCX', click: () => exportFile('docx') },
            { label: 'LaTeX', click: () => exportFile('latex') },
            { label: 'RTF', click: () => exportFile('rtf') },
            { label: 'ODT', click: () => exportFile('odt') },
            { label: 'EPUB', click: () => exportFile('epub') },
            { type: 'separator' },
            { label: 'PowerPoint (PPTX)', click: () => exportFile('pptx') },
            { label: 'OpenDocument Presentation (ODP)', click: () => exportFile('odp') },
            { type: 'separator' },
            { label: 'Excel (XLSX)', click: () => exportSpreadsheet('xlsx') },
            { label: 'Excel Legacy (XLS)', click: () => exportSpreadsheet('xls') },
            { label: 'OpenDocument Spreadsheet (ODS)', click: () => exportSpreadsheet('ods') }
          ]
        },
        { type: 'separator' },
        {
          label: 'Quit',
          accelerator: process.platform === 'darwin' ? 'Cmd+Q' : 'Ctrl+Q',
          click: () => app.quit()
        }
      ]
    },
    {
      label: 'Edit',
      submenu: [
        { label: 'Undo', accelerator: 'CmdOrCtrl+Z', role: 'undo' },
        { label: 'Redo', accelerator: 'CmdOrCtrl+Shift+Z', role: 'redo' },
        { type: 'separator' },
        { label: 'Cut', accelerator: 'CmdOrCtrl+X', role: 'cut' },
        { label: 'Copy', accelerator: 'CmdOrCtrl+C', role: 'copy' },
        { label: 'Paste', accelerator: 'CmdOrCtrl+V', role: 'paste' },
        { label: 'Select All', accelerator: 'CmdOrCtrl+A', role: 'selectAll' },
        { type: 'separator' },
        { 
          label: 'Find & Replace', 
          accelerator: 'CmdOrCtrl+F', 
          click: () => mainWindow.webContents.send('toggle-find') 
        }
      ]
    },
    {
      label: 'View',
      submenu: [
        {
          label: 'Toggle Preview',
          accelerator: 'CmdOrCtrl+P',
          click: () => mainWindow.webContents.send('toggle-preview')
        },
        {
          label: 'Theme',
          submenu: [
            { label: 'Light', click: () => setTheme('light') },
            { label: 'Dark', click: () => setTheme('dark') },
            { label: 'Solarized', click: () => setTheme('solarized') },
            { label: 'Monokai', click: () => setTheme('monokai') },
            { label: 'GitHub', click: () => setTheme('github') }
          ]
        },
        { type: 'separator' },
        { label: 'Reload', accelerator: 'CmdOrCtrl+R', role: 'reload' },
        { label: 'Toggle DevTools', accelerator: 'F12', role: 'toggleDevTools' },
        { type: 'separator' },
        { label: 'Zoom In', accelerator: 'CmdOrCtrl+Plus', role: 'zoomIn' },
        { label: 'Zoom Out', accelerator: 'CmdOrCtrl+-', role: 'zoomOut' },
        { label: 'Reset Zoom', accelerator: 'CmdOrCtrl+0', role: 'resetZoom' }
      ]
    },
    {
      label: 'Help',
      submenu: [
        {
          label: 'About',
          click: () => {
            dialog.showMessageBox(mainWindow, {
              type: 'info',
              title: 'About PanConverter',
              message: 'PanConverter',
              detail: 'A cross-platform Markdown editor and converter using Pandoc.\n\nVersion: 1.3.1\nAuthor: Amit Haridas\nEmail: amit.wh@gmail.com\nLicense: MIT\n\nFeatures:\n• Tabbed interface for multiple files\n• Advanced markdown editing with live preview\n• Enhanced PDF export with LaTeX engines\n• File association support for .md files\n• Find & replace with match highlighting\n• Line numbers and auto-indentation\n• Export to multiple formats via Pandoc\n• PowerPoint & presentation export\n• Export tables to Excel/ODS spreadsheets\n• Document import & conversion\n• Table creation helper\n• Multiple themes support\n• Undo/redo functionality',
              buttons: ['OK']
            });
          }
        },
        {
          label: 'Documentation',
          click: () => shell.openExternal('https://github.com/amitwh/pan-converter')
        }
      ]
    }
  ];
  const menu = Menu.buildFromTemplate(template);
  Menu.setApplicationMenu(menu);
 }
 function openFile() {
  const files = dialog.showOpenDialogSync(mainWindow, {
    properties: ['openFile'],
    filters: [
      { name: 'Markdown', extensions: ['md', 'markdown'] },
      { name: 'All Files', extensions: ['*'] }
    ]
  });
  if (files && files[0]) {
    currentFile = files[0];
    const content = fs.readFileSync(currentFile, 'utf-8');
    mainWindow.webContents.send('file-opened', { path: currentFile, content });
  }
 }
 function saveAsFile() {
  const file = dialog.showSaveDialogSync(mainWindow, {
    defaultExt: '.md',
    filters: [
      { name: 'Markdown', extensions: ['md', 'markdown'] },
      { name: 'All Files', extensions: ['*'] }
    ]
  });
  if (file) {
    currentFile = file;
    mainWindow.webContents.send('get-content-for-save', file);
  }
 }
 function exportFile(format) {
  if (!currentFile) {
    dialog.showErrorBox('Error', 'Please save the file first');
    return;
  }
  const outputFile = dialog.showSaveDialogSync(mainWindow, {
    defaultPath: currentFile.replace(/\.[^/.]+$/, `.${format}`),
    filters: [
      { name: format.toUpperCase(), extensions: [format] }
    ]
  });
  if (outputFile) {
    let pandocCmd = `pandoc "${currentFile}" -o "${outputFile}"`;
    // Add specific options for PDF export to ensure proper generation
    if (format === 'pdf') {
      pandocCmd = `pandoc "${currentFile}" --pdf-engine=xelatex -V geometry:margin=1in -o "${outputFile}"`;
      // Try with different PDF engines if xelatex fails
      exec(pandocCmd, (error, stdout, stderr) => {
        if (error) {
          // Fallback to pdflatex
          const fallbackCmd = `pandoc "${currentFile}" --pdf-engine=pdflatex -V geometry:margin=1in -o "${outputFile}"`;
          exec(fallbackCmd, (fallbackError, fallbackStdout, fallbackStderr) => {
            if (fallbackError) {
              // Final fallback to wkhtmltopdf
              const htmlToPdfCmd = `pandoc "${currentFile}" -t html5 | wkhtmltopdf - "${outputFile}"`;
              exec(htmlToPdfCmd, (finalError) => {
                if (finalError) {
                  dialog.showErrorBox('PDF Export Error', 
                    `Failed to export PDF. Please ensure you have one of the following installed:\n` +
                    `• XeLaTeX (recommended): sudo apt-get install texlive-xetex\n` +
                    `• PDFLaTeX: sudo apt-get install texlive-latex-base\n` +
                    `• wkhtmltopdf: sudo apt-get install wkhtmltopdf\n\n` +
                    `Error: ${finalError.message}`
                  );
                } else {
                  showExportSuccess(outputFile);
                }
              });
            } else {
              showExportSuccess(outputFile);
            }
          });
        } else {
          showExportSuccess(outputFile);
        }
      });
    } else {
      exec(pandocCmd, (error, stdout, stderr) => {
        if (error) {
          dialog.showErrorBox('Export Error', `Failed to export: ${error.message}\n\nMake sure Pandoc is installed.`);
        } else {
          showExportSuccess(outputFile);
        }
      });
    }
  }
 }
 function showExportSuccess(outputFile) {
  dialog.showMessageBox(mainWindow, {
    type: 'info',
    title: 'Export Complete',
    message: `File exported successfully to ${outputFile}`,
    buttons: ['OK']
  });
 }
 function exportSpreadsheet(format) {
  if (!currentFile) {
    dialog.showErrorBox('Error', 'Please save the file first');
    return;
  }
  // Request content from renderer
  mainWindow.webContents.send('get-content-for-spreadsheet', format);
 }
 function importDocument() {
  const files = dialog.showOpenDialogSync(mainWindow, {
    properties: ['openFile'],
    filters: [
      { name: 'Documents', extensions: ['docx', 'odt', 'rtf', 'html', 'tex', 'epub', 'pdf'] },
      { name: 'Presentations', extensions: ['pptx', 'odp'] },
      { name: 'All Files', extensions: ['*'] }
    ]
  });
  if (files && files[0]) {
    const inputFile = files[0];
    const outputFile = inputFile.replace(/\.[^/.]+$/, '.md');
    // Convert to markdown using pandoc
    const pandocCmd = `pandoc "${inputFile}" -t markdown -o "${outputFile}"`;
    exec(pandocCmd, (error, stdout, stderr) => {
      if (error) {
        dialog.showErrorBox('Import Error', `Failed to import: ${error.message}\n\nMake sure Pandoc is installed.`);
      } else {
        // Open the converted markdown file
        currentFile = outputFile;
        const content = fs.readFileSync(outputFile, 'utf-8');
        mainWindow.webContents.send('file-opened', { path: outputFile, content });
        dialog.showMessageBox(mainWindow, {
          type: 'info',
          title: 'Import Complete',
          message: `Document imported successfully as ${outputFile}`,
          buttons: ['OK']
        });
      }
    });
  }
 }
 function setTheme(theme) {
  store.set('theme', theme);
  mainWindow.webContents.send('theme-changed', theme);
 }
 // IPC handlers
 ipcMain.on('save-file', (event, { path, content }) => {
  fs.writeFileSync(path, content, 'utf-8');
  currentFile = path;
 });
 ipcMain.on('save-current-file', (event, content) => {
  if (currentFile) {
    fs.writeFileSync(currentFile, content, 'utf-8');
  } else {
    saveAsFile();
  }
 });
 ipcMain.on('get-theme', (event) => {
  const theme = store.get('theme', 'light');
  event.reply('theme-changed', theme);
 });
 // Handle tab file tracking for exports
 ipcMain.on('set-current-file', (event, filePath) => {
  currentFile = filePath;
 });
 ipcMain.on('export-spreadsheet', (event, { content, format }) => {
  const outputFile = dialog.showSaveDialogSync(mainWindow, {
    defaultPath: currentFile.replace(/\.[^/.]+$/, `.${format}`),
    filters: [
      { name: format.toUpperCase(), extensions: [format] }
    ]
  });
  if (outputFile) {
    try {
      // Parse markdown content to extract tables
      const tables = extractTablesFromMarkdown(content);
      if (tables.length === 0) {
        dialog.showErrorBox('Export Error', 'No tables found in the markdown content');
        return;
      }
      // Create workbook
      const wb = XLSX.utils.book_new();
      tables.forEach((table, index) => {
        const ws = XLSX.utils.aoa_to_sheet(table);
        XLSX.utils.book_append_sheet(wb, ws, `Table ${index + 1}`);
      });
      // Write file
      XLSX.writeFile(wb, outputFile);
      dialog.showMessageBox(mainWindow, {
        type: 'info',
        title: 'Export Complete',
        message: `Spreadsheet exported successfully to ${outputFile}`,
        buttons: ['OK']
      });
    } catch (error) {
      dialog.showErrorBox('Export Error', `Failed to export: ${error.message}`);
    }
  }
 });
 // Helper function to extract tables from markdown
 function extractTablesFromMarkdown(markdown) {
  const tables = [];
  const lines = markdown.split('\n');
  let currentTable = [];
  let inTable = false;
  for (const line of lines) {
    if (line.includes('|')) {
      if (!inTable) {
        inTable = true;
        currentTable = [];
      }
      // Skip separator lines (|---|---|)
      if (!line.match(/^\s*\|?\s*:?-+:?\s*\|/)) {
        const cells = line.split('|')
          .map(cell => cell.trim())
          .filter(cell => cell !== '');
        if (cells.length > 0) {
          currentTable.push(cells);
        }
      }
    } else if (inTable && line.trim() === '') {
      // End of table
      if (currentTable.length > 0) {
        tables.push(currentTable);
      }
      currentTable = [];
      inTable = false;
    }
  }
  // Add last table if exists
  if (currentTable.length > 0) {
    tables.push(currentTable);
  }
  return tables;
 }
 app.whenReady().then(() => {
  createWindow();
  // Handle file association on app startup
  // Process all command line arguments except the first two (node and script path)
  const fileArgs = process.argv.slice(2);
  for (const arg of fileArgs) {
    if ((arg.endsWith('.md') || arg.endsWith('.markdown')) && fs.existsSync(arg)) {
      // Store the file to open after window is ready
      app.pendingFile = arg;
      break;
    }
  }
 });
 app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit();
  }
 });
 app.on('activate', () => {
  if (BrowserWindow.getAllWindows().length === 0) {
    createWindow();
  }
 });
 // Handle file opening on macOS
 app.on('open-file', (event, filePath) => {
  event.preventDefault();
  if (mainWindow) {
    openFileFromPath(filePath);
  } else {
    // Store the file path to open after window is created
    app.pendingFile = filePath;
  }
 });
 // Handle file opening from command line or file association
 function openFileFromPath(filePath) {
  if (fs.existsSync(filePath)) {
    currentFile = filePath;
    const content = fs.readFileSync(filePath, 'utf-8');
    if (mainWindow && mainWindow.webContents) {
      mainWindow.webContents.send('file-opened', { path: filePath, content });
    }
  }
 }
@@ -0,0 +1,540 @@
 const { ipcRenderer } = require('electron');
 const marked = require('marked');
 const DOMPurify = require('dompurify');
 const hljs = require('highlight.js');
 // Configure marked
 marked.setOptions({
    highlight: function(code, lang) {
        if (lang && hljs.getLanguage(lang)) {
            try {
                return hljs.highlight(code, { language: lang }).value;
            } catch (err) {}
        }
        return hljs.highlightAuto(code).value;
    },
    breaks: true,
    gfm: true
 });
 // Tab Management
 class TabManager {
    constructor() {
        this.tabs = new Map();
        this.activeTabId = 1;
        this.nextTabId = 2;
        this.isPreviewVisible = true;
        this.showLineNumbers = false;
        // Initialize first tab
        this.tabs.set(1, {
            id: 1,
            title: 'Untitled',
            content: '',
            filePath: null,
            isDirty: false,
            undoStack: [],
            redoStack: [],
            findMatches: [],
            currentMatchIndex: -1
        });
        this.setupEventListeners();
        this.updateUI();
    }
    setupEventListeners() {
        // Tab bar events
        document.getElementById('new-tab-btn').addEventListener('click', () => this.createNewTab());
        document.getElementById('tab-bar').addEventListener('click', (e) => {
            if (e.target.classList.contains('tab-close')) {
                e.stopPropagation();
                const tabId = parseInt(e.target.closest('.tab').dataset.tabId);
                this.closeTab(tabId);
            } else if (e.target.closest('.tab')) {
                const tabId = parseInt(e.target.closest('.tab').dataset.tabId);
                this.switchToTab(tabId);
            }
        });
        // Editor events for active tab
        this.setupEditorEvents();
        // Toolbar events
        this.setupToolbarEvents();
        // Find dialog events
        this.setupFindEvents();
        // Keyboard shortcuts
        document.addEventListener('keydown', (e) => {
            if (e.ctrlKey || e.metaKey) {
                switch (e.key) {
                    case 'n':
                        e.preventDefault();
                        this.createNewTab();
                        break;
                    case 'w':
                        if (this.tabs.size > 1) {
                            e.preventDefault();
                            this.closeTab(this.activeTabId);
                        }
                        break;
                    case 't':
                        e.preventDefault();
                        this.createNewTab();
                        break;
                    case 'Tab':
                        if (this.tabs.size > 1) {
                            e.preventDefault();
                            this.switchToNextTab();
                        }
                        break;
                }
            }
        });
    }
    createNewTab() {
        const newTabId = this.nextTabId++;
        const tab = {
            id: newTabId,
            title: 'Untitled',
            content: '',
            filePath: null,
            isDirty: false,
            undoStack: [],
            redoStack: [],
            findMatches: [],
            currentMatchIndex: -1
        };
        this.tabs.set(newTabId, tab);
        this.createTabElements(tab);
        this.switchToTab(newTabId);
        this.updateTabBar();
    }
    createTabElements(tab) {
        // Create tab content container
        const tabContent = document.createElement('div');
        tabContent.className = 'tab-content';
        tabContent.id = `tab-content-${tab.id}`;
        tabContent.dataset.tabId = tab.id;
        tabContent.innerHTML = `
            <div id="editor-pane-${tab.id}" class="pane">
                <div class="editor-wrapper">
                    <div id="line-numbers-${tab.id}" class="line-numbers hidden"></div>
                    <textarea id="editor-${tab.id}" class="editor-textarea"></textarea>
                </div>
            </div>
            <div id="preview-pane-${tab.id}" class="pane">
                <div id="preview-${tab.id}" class="preview-content"></div>
            </div>
        `;
        document.querySelector('.editor-container').appendChild(tabContent);
    }
    switchToTab(tabId) {
        if (!this.tabs.has(tabId)) return;
        // Save current tab state before switching
        if (this.activeTabId && this.tabs.has(this.activeTabId)) {
            this.saveCurrentTabState();
        }
        this.activeTabId = tabId;
        this.updateUI();
        this.restoreTabState(tabId);
        this.focusActiveEditor();
        // Notify main process about current file for exports
        const tab = this.tabs.get(tabId);
        if (tab && tab.filePath) {
            ipcRenderer.send('set-current-file', tab.filePath);
        }
    }
    switchToNextTab() {
        const tabIds = Array.from(this.tabs.keys());
        const currentIndex = tabIds.indexOf(this.activeTabId);
        const nextIndex = (currentIndex + 1) % tabIds.length;
        this.switchToTab(tabIds[nextIndex]);
    }
    closeTab(tabId) {
        if (this.tabs.size === 1) return; // Don't close the last tab
        const tab = this.tabs.get(tabId);
        if (tab.isDirty) {
            // TODO: Show confirmation dialog
        }
        // Remove tab elements
        const tabElement = document.querySelector(`[data-tab-id="${tabId}"]`);
        const tabContent = document.getElementById(`tab-content-${tabId}`);
        if (tabElement && tabElement.classList.contains('tab')) {
            tabElement.remove();
        }
        if (tabContent) {
            tabContent.remove();
        }
        this.tabs.delete(tabId);
        // Switch to another tab if this was active
        if (this.activeTabId === tabId) {
            const remainingTabs = Array.from(this.tabs.keys());
            this.switchToTab(remainingTabs[0]);
        }
        this.updateTabBar();
    }
    updateTabBar() {
        const tabBar = document.getElementById('tab-bar');
        const existingTabs = tabBar.querySelectorAll('.tab');
        // Remove all existing tab elements except the new tab button
        existingTabs.forEach(tab => tab.remove());
        // Add tabs in order
        const sortedTabs = Array.from(this.tabs.values()).sort((a, b) => a.id - b.id);
        const newTabBtn = document.getElementById('new-tab-btn');
        sortedTabs.forEach(tab => {
            const tabElement = document.createElement('div');
            tabElement.className = `tab ${tab.id === this.activeTabId ? 'active' : ''}`;
            tabElement.dataset.tabId = tab.id;
            const title = tab.filePath ? 
                tab.filePath.split('/').pop() : 
                tab.title;
            const dirtyIndicator = tab.isDirty ? ' •' : '';
            tabElement.innerHTML = `
                <span class="tab-title">${title}${dirtyIndicator}</span>
                <button class="tab-close" title="Close tab">×</button>
            `;
            tabBar.insertBefore(tabElement, newTabBtn);
        });
    }
    updateUI() {
        // Show/hide tab contents
        document.querySelectorAll('.tab-content').forEach(content => {
            content.classList.remove('active');
        });
        const activeContent = document.getElementById(`tab-content-${this.activeTabId}`);
        if (activeContent) {
            activeContent.classList.add('active');
        }
        // Update preview visibility
        this.updatePreviewVisibility();
        this.updateLineNumbers();
        this.updateTabBar();
    }
    saveCurrentTabState() {
        const tab = this.tabs.get(this.activeTabId);
        if (!tab) return;
        const editor = document.getElementById(`editor-${this.activeTabId}`);
        if (editor) {
            tab.content = editor.value;
            tab.isDirty = tab.content !== (tab.originalContent || '');
        }
    }
    restoreTabState(tabId) {
        const tab = this.tabs.get(tabId);
        if (!tab) return;
        const editor = document.getElementById(`editor-${tabId}`);
        const preview = document.getElementById(`preview-${tabId}`);
        if (editor) {
            editor.value = tab.content;
            this.updatePreview(tabId);
            this.updateWordCount();
        }
    }
    focusActiveEditor() {
        const editor = document.getElementById(`editor-${this.activeTabId}`);
        if (editor) {
            editor.focus();
        }
    }
    updatePreview(tabId = this.activeTabId) {
        const tab = this.tabs.get(tabId);
        const preview = document.getElementById(`preview-${tabId}`);
        if (!tab || !preview) return;
        try {
            const html = marked.parse(tab.content);
            const sanitizedHtml = DOMPurify.sanitize(html);
            preview.innerHTML = sanitizedHtml;
        } catch (error) {
            preview.innerHTML = '<p>Error rendering preview</p>';
        }
    }
    updatePreviewVisibility() {
        document.querySelectorAll('.tab-content').forEach(content => {
            const previewPane = content.querySelector('.pane:last-child');
            const editorPane = content.querySelector('.pane:first-child');
            if (this.isPreviewVisible) {
                previewPane.classList.remove('hidden');
                editorPane.classList.remove('full-width');
            } else {
                previewPane.classList.add('hidden');
                editorPane.classList.add('full-width');
            }
        });
    }
    updateLineNumbers() {
        const editor = document.getElementById(`editor-${this.activeTabId}`);
        const lineNumbers = document.getElementById(`line-numbers-${this.activeTabId}`);
        if (!editor || !lineNumbers) return;
        if (this.showLineNumbers) {
            const lines = editor.value.split('\\n');
            lineNumbers.innerHTML = lines.map((_, i) => 
                `<div class="line-number">${i + 1}</div>`
            ).join('');
            lineNumbers.classList.remove('hidden');
        } else {
            lineNumbers.classList.add('hidden');
        }
    }
    updateWordCount() {
        const tab = this.tabs.get(this.activeTabId);
        if (!tab) return;
        const words = tab.content.trim().split(/\\s+/).filter(word => word.length > 0).length;
        const chars = tab.content.length;
        document.getElementById('word-count').textContent = `Words: ${words} | Characters: ${chars}`;
    }
    setupEditorEvents() {
        // Set up editor events using event delegation
        document.addEventListener('input', (e) => {
            if (e.target.classList.contains('editor-textarea')) {
                const tabId = parseInt(e.target.id.split('-')[1]);
                if (tabId === this.activeTabId) {
                    this.handleEditorInput(tabId);
                }
            }
        });
        document.addEventListener('scroll', (e) => {
            if (e.target.classList.contains('editor-textarea')) {
                const tabId = parseInt(e.target.id.split('-')[1]);
                if (tabId === this.activeTabId) {
                    this.updateLineNumbers();
                }
            }
        });
    }
    handleEditorInput(tabId) {
        const tab = this.tabs.get(tabId);
        if (!tab) return;
        const editor = document.getElementById(`editor-${tabId}`);
        tab.content = editor.value;
        tab.isDirty = true;
        this.updatePreview(tabId);
        this.updateWordCount();
        this.updateLineNumbers();
        this.updateTabBar();
        // Add to undo stack
        this.pushUndoState(tabId);
    }
    pushUndoState(tabId) {
        const tab = this.tabs.get(tabId);
        if (!tab) return;
        tab.undoStack.push(tab.content);
        if (tab.undoStack.length > 50) {
            tab.undoStack.shift();
        }
        tab.redoStack = [];
    }
    undo() {
        const tab = this.tabs.get(this.activeTabId);
        if (!tab || tab.undoStack.length === 0) return;
        tab.redoStack.push(tab.content);
        tab.content = tab.undoStack.pop();
        const editor = document.getElementById(`editor-${this.activeTabId}`);
        if (editor) {
            editor.value = tab.content;
            this.updatePreview();
            this.updateWordCount();
        }
    }
    redo() {
        const tab = this.tabs.get(this.activeTabId);
        if (!tab || tab.redoStack.length === 0) return;
        tab.undoStack.push(tab.content);
        tab.content = tab.redoStack.pop();
        const editor = document.getElementById(`editor-${this.activeTabId}`);
        if (editor) {
            editor.value = tab.content;
            this.updatePreview();
            this.updateWordCount();
        }
    }
    setupToolbarEvents() {
        // Existing toolbar setup...
        document.getElementById('btn-preview-toggle').addEventListener('click', () => {
            this.isPreviewVisible = !this.isPreviewVisible;
            this.updatePreviewVisibility();
        });
        document.getElementById('btn-line-numbers').addEventListener('click', () => {
            this.showLineNumbers = !this.showLineNumbers;
            this.updateLineNumbers();
        });
        // Add other toolbar events...
    }
    setupFindEvents() {
        // Find dialog implementation...
        document.getElementById('btn-find').addEventListener('click', () => {
            document.getElementById('find-dialog').classList.remove('hidden');
            document.getElementById('find-input').focus();
        });
        document.getElementById('btn-find-close').addEventListener('click', () => {
            document.getElementById('find-dialog').classList.add('hidden');
        });
    }
    // File operations
    openFile(filePath, content) {
        let tab = this.tabs.get(this.activeTabId);
        // If current tab is empty and untitled, reuse it
        if (!tab.filePath && !tab.isDirty && tab.content === '') {
            tab.filePath = filePath;
            tab.title = filePath.split('/').pop();
            tab.content = content;
            tab.originalContent = content;
            tab.isDirty = false;
        } else {
            // Create new tab for the file
            this.createNewTab();
            tab = this.tabs.get(this.activeTabId);
            tab.filePath = filePath;
            tab.title = filePath.split('/').pop();
            tab.content = content;
            tab.originalContent = content;
            tab.isDirty = false;
        }
        this.restoreTabState(this.activeTabId);
        this.updateTabBar();
    }
    getCurrentContent() {
        const tab = this.tabs.get(this.activeTabId);
        return tab ? tab.content : '';
    }
    getCurrentFilePath() {
        const tab = this.tabs.get(this.activeTabId);
        return tab ? tab.filePath : null;
    }
 }
 // Initialize tab manager
 let tabManager;
 document.addEventListener('DOMContentLoaded', () => {
    tabManager = new TabManager();
    // Request current theme
    ipcRenderer.send('get-theme');
    // Set up auto-save interval
    setInterval(() => {
        // Auto-save logic for all tabs
        tabManager.tabs.forEach(tab => {
            if (tab.isDirty && tab.filePath) {
                ipcRenderer.send('save-current-file', tab.content);
            }
        });
    }, 30000);
 });
 // IPC event listeners
 ipcRenderer.on('file-new', () => {
    tabManager.createNewTab();
 });
 ipcRenderer.on('file-opened', (event, data) => {
    tabManager.openFile(data.path, data.content);
 });
 ipcRenderer.on('file-save', () => {
    const currentContent = tabManager.getCurrentContent();
    const currentFilePath = tabManager.getCurrentFilePath();
    if (currentFilePath) {
        ipcRenderer.send('save-current-file', currentContent);
    }
 });
 ipcRenderer.on('get-content-for-save', (event, filePath) => {
    const currentContent = tabManager.getCurrentContent();
    ipcRenderer.send('save-file', { path: filePath, content: currentContent });
 });
 ipcRenderer.on('get-content-for-spreadsheet', (event, format) => {
    const currentContent = tabManager.getCurrentContent();
    ipcRenderer.send('export-spreadsheet', { content: currentContent, format });
 });
 ipcRenderer.on('toggle-preview', () => {
    tabManager.isPreviewVisible = !tabManager.isPreviewVisible;
    tabManager.updatePreviewVisibility();
 });
 ipcRenderer.on('toggle-find', () => {
    const findDialog = document.getElementById('find-dialog');
    if (findDialog.classList.contains('hidden')) {
        findDialog.classList.remove('hidden');
        document.getElementById('find-input').focus();
    } else {
        findDialog.classList.add('hidden');
    }
 });
 ipcRenderer.on('theme-changed', (event, theme) => {
    document.body.className = `theme-${theme}`;
 });
@@ -0,0 +1,770 @@
 * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
 }
 body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    overflow: hidden;
    height: 100vh;
 }
 .container {
    display: flex;
    flex-direction: column;
    height: 100vh;
 }
 /* Tab Bar */
 .tab-bar {
    display: flex;
    align-items: center;
    background: #f0f0f0;
    border-bottom: 1px solid #ddd;
    padding: 0 8px;
    min-height: 36px;
 }
 .tab {
    display: flex;
    align-items: center;
    padding: 6px 12px;
    background: #e8e8e8;
    border: 1px solid #ccc;
    border-bottom: none;
    border-radius: 6px 6px 0 0;
    margin-right: 2px;
    cursor: pointer;
    user-select: none;
    max-width: 200px;
    min-width: 120px;
 }
 .tab.active {
    background: #fff;
    border-color: #999;
    z-index: 1;
 }
 .tab-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
 }
 .tab-close {
    background: none;
    border: none;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    padding: 0;
    margin-left: 8px;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
    color: #666;
 }
 .tab-close:hover {
    background: #ddd;
    color: #000;
 }
 .new-tab-button {
    background: none;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 14px;
    margin-left: 8px;
    color: #666;
 }
 .new-tab-button:hover {
    background: #e8e8e8;
 }
 /* Tab Content */
 .tab-content {
    display: flex;
    flex: 1;
    overflow: hidden;
 }
 .tab-content:not(.active) {
    display: none;
 }
 /* Toolbar */
 .toolbar {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    background: #f5f5f5;
    border-bottom: 1px solid #ddd;
    gap: 4px;
 }
 .toolbar button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 1px solid transparent;
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
 }
 .toolbar button:hover {
    background: #e0e0e0;
    border-color: #ccc;
 }
 .toolbar button:active {
    background: #d0d0d0;
 }
 .toolbar-separator {
    width: 1px;
    height: 24px;
    background: #ccc;
    margin: 0 8px;
 }
 /* Editor Container */
 .editor-container {
    display: flex;
    flex: 1;
    overflow: hidden;
 }
 .pane {
    flex: 1;
    overflow: auto;
    min-width: 0;
 }
 .pane:first-child {
    border-right: 1px solid #ddd;
 }
 .editor-textarea {
    width: 100%;
    height: 100%;
    padding: 20px;
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    border: none;
    outline: none;
    resize: none;
 }
 .pane:last-child {
    padding: 20px;
    background: #fff;
 }
 .preview-content {
    max-width: 800px;
    margin: 0 auto;
 }
 /* Legacy support for old selectors */
 #editor-pane {
    border-right: 1px solid #ddd;
 }
 #editor {
    width: 100%;
    height: 100%;
    padding: 20px;
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    border: none;
    outline: none;
    resize: none;
 }
 #preview-pane {
    padding: 20px;
    background: #fff;
 }
 #preview {
    max-width: 800px;
    margin: 0 auto;
 }
 /* Status Bar */
 .status-bar {
    display: flex;
    justify-content: space-between;
    padding: 4px 12px;
    background: #f5f5f5;
    border-top: 1px solid #ddd;
    font-size: 12px;
    color: #666;
 }
 /* Preview Styles */
 #preview h1, #preview h2, #preview h3, #preview h4, #preview h5, #preview h6 {
    margin-top: 24px;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.25;
 }
 #preview h1 {
    font-size: 2em;
    border-bottom: 1px solid #eaecef;
    padding-bottom: 0.3em;
 }
 #preview h2 {
    font-size: 1.5em;
    border-bottom: 1px solid #eaecef;
    padding-bottom: 0.3em;
 }
 #preview p {
    margin-bottom: 16px;
    line-height: 1.6;
 }
 #preview code {
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    background-color: rgba(27,31,35,0.05);
    border-radius: 3px;
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
 }
 #preview pre {
    padding: 16px;
    overflow: auto;
    font-size: 85%;
    line-height: 1.45;
    background-color: #f6f8fa;
    border-radius: 3px;
    margin-bottom: 16px;
 }
 #preview pre code {
    display: inline;
    max-width: auto;
    padding: 0;
    margin: 0;
    overflow: visible;
    line-height: inherit;
    word-wrap: normal;
    background-color: transparent;
    border: 0;
 }
 #preview blockquote {
    padding: 0 1em;
    color: #6a737d;
    border-left: 0.25em solid #dfe2e5;
    margin-bottom: 16px;
 }
 #preview ul, #preview ol {
    padding-left: 2em;
    margin-bottom: 16px;
 }
 #preview li {
    margin-bottom: 4px;
 }
 #preview a {
    color: #0366d6;
    text-decoration: none;
 }
 #preview a:hover {
    text-decoration: underline;
 }
 #preview img {
    max-width: 100%;
    height: auto;
 }
 #preview table {
    border-collapse: collapse;
    margin-bottom: 16px;
    width: 100%;
 }
 #preview table th,
 #preview table td {
    padding: 6px 13px;
    border: 1px solid #dfe2e5;
 }
 #preview table th {
    font-weight: 600;
    background-color: #f6f8fa;
 }
 #preview table tr:nth-child(2n) {
    background-color: #f6f8fa;
 }
 /* Theme: Dark */
 body.theme-dark {
    background: #1e1e1e;
    color: #d4d4d4;
 }
 body.theme-dark .tab-bar {
    background: #2d2d30;
    border-bottom-color: #3e3e42;
 }
 body.theme-dark .tab {
    background: #3c3c3c;
    border-color: #555;
    color: #d4d4d4;
 }
 body.theme-dark .tab.active {
    background: #1e1e1e;
    border-color: #666;
 }
 body.theme-dark .tab-close {
    color: #ccc;
 }
 body.theme-dark .tab-close:hover {
    background: #555;
    color: #fff;
 }
 body.theme-dark .new-tab-button {
    border-color: #555;
    color: #ccc;
 }
 body.theme-dark .new-tab-button:hover {
    background: #3c3c3c;
 }
 body.theme-dark .toolbar {
    background: #2d2d30;
    border-bottom-color: #3e3e42;
 }
 body.theme-dark .toolbar button {
    color: #cccccc;
 }
 body.theme-dark .toolbar button:hover {
    background: #3e3e42;
    border-color: #464647;
 }
 body.theme-dark .toolbar-separator {
    background: #3e3e42;
 }
 body.theme-dark .pane:first-child {
    border-right-color: #3e3e42;
 }
 body.theme-dark .editor-textarea {
    background: #1e1e1e;
    color: #d4d4d4;
 }
 body.theme-dark .pane:last-child {
    background: #252526;
 }
 /* Legacy support */
 body.theme-dark #editor-pane {
    border-right-color: #3e3e42;
 }
 body.theme-dark #editor {
    background: #1e1e1e;
    color: #d4d4d4;
 }
 body.theme-dark #preview-pane {
    background: #252526;
 }
 body.theme-dark #preview {
    color: #d4d4d4;
 }
 body.theme-dark #preview h1,
 body.theme-dark #preview h2 {
    border-bottom-color: #3e3e42;
 }
 body.theme-dark #preview code {
    background-color: rgba(255,255,255,0.1);
 }
 body.theme-dark #preview pre {
    background-color: #2d2d30;
 }
 body.theme-dark #preview blockquote {
    color: #808080;
    border-left-color: #3e3e42;
 }
 body.theme-dark #preview a {
    color: #569cd6;
 }
 body.theme-dark #preview table th,
 body.theme-dark #preview table td {
    border-color: #3e3e42;
 }
 body.theme-dark #preview table th {
    background-color: #2d2d30;
 }
 body.theme-dark #preview table tr:nth-child(2n) {
    background-color: #2d2d30;
 }
 body.theme-dark .status-bar {
    background: #2d2d30;
    border-top-color: #3e3e42;
    color: #969696;
 }
 /* Theme: Solarized */
 body.theme-solarized {
    background: #fdf6e3;
    color: #657b83;
 }
 body.theme-solarized .toolbar {
    background: #eee8d5;
    border-bottom-color: #93a1a1;
 }
 body.theme-solarized .toolbar button {
    color: #586e75;
 }
 body.theme-solarized .toolbar button:hover {
    background: #fdf6e3;
    border-color: #93a1a1;
 }
 body.theme-solarized #editor {
    background: #fdf6e3;
    color: #657b83;
 }
 body.theme-solarized #preview {
    color: #586e75;
 }
 body.theme-solarized #preview code {
    background-color: #eee8d5;
 }
 body.theme-solarized #preview pre {
    background-color: #eee8d5;
 }
 body.theme-solarized #preview a {
    color: #268bd2;
 }
 /* Theme: Monokai */
 body.theme-monokai {
    background: #272822;
    color: #f8f8f2;
 }
 body.theme-monokai .toolbar {
    background: #3e3d32;
    border-bottom-color: #75715e;
 }
 body.theme-monokai .toolbar button {
    color: #f8f8f2;
 }
 body.theme-monokai .toolbar button:hover {
    background: #49483e;
    border-color: #75715e;
 }
 body.theme-monokai #editor {
    background: #272822;
    color: #f8f8f2;
 }
 body.theme-monokai #preview-pane {
    background: #272822;
 }
 body.theme-monokai #preview {
    color: #f8f8f2;
 }
 body.theme-monokai #preview h1,
 body.theme-monokai #preview h2 {
    border-bottom-color: #75715e;
 }
 body.theme-monokai #preview code {
    background-color: #3e3d32;
 }
 body.theme-monokai #preview pre {
    background-color: #3e3d32;
 }
 body.theme-monokai #preview blockquote {
    color: #75715e;
    border-left-color: #75715e;
 }
 body.theme-monokai #preview a {
    color: #66d9ef;
 }
 body.theme-monokai .status-bar {
    background: #3e3d32;
    border-top-color: #75715e;
    color: #75715e;
 }
 /* Theme: GitHub */
 body.theme-github {
    background: #fff;
    color: #24292e;
 }
 body.theme-github .toolbar {
    background: #fafbfc;
    border-bottom-color: #e1e4e8;
 }
 body.theme-github .toolbar button {
    color: #586069;
 }
 body.theme-github .toolbar button:hover {
    background: #f6f8fa;
    border-color: #e1e4e8;
 }
 body.theme-github #editor {
    background: #fff;
    color: #24292e;
 }
 body.theme-github #preview {
    color: #24292e;
 }
 body.theme-github #preview h1,
 body.theme-github #preview h2 {
    border-bottom-color: #eaecef;
 }
 body.theme-github #preview code {
    background-color: rgba(27,31,35,0.05);
 }
 body.theme-github #preview pre {
    background-color: #f6f8fa;
 }
 body.theme-github #preview blockquote {
    color: #6a737d;
    border-left-color: #dfe2e5;
 }
 body.theme-github #preview a {
    color: #0366d6;
 }
 body.theme-github .status-bar {
    background: #fafbfc;
    border-top-color: #e1e4e8;
    color: #586069;
 }
 /* Hide preview pane by default */
 .pane.hidden {
    display: none;
 }
 .pane.full-width {
    border-right: none;
 }
 /* Legacy support */
 #preview-pane.hidden {
    display: none;
 }
 #editor-pane.full-width {
    border-right: none;
 }
 /* Find & Replace Dialog */
 .find-dialog {
    position: absolute;
    top: 60px;
    right: 20px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1000;
    min-width: 400px;
    padding: 12px;
 }
 .find-dialog.hidden {
    display: none;
 }
 .find-controls {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
 }
 .find-controls input {
    flex: 1;
    padding: 6px 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 13px;
 }
 .find-controls button {
    padding: 6px 10px;
    border: 1px solid #ddd;
    background: #f5f5f5;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    white-space: nowrap;
 }
 .find-controls button:hover {
    background: #e5e5e5;
 }
 .find-info {
    font-size: 12px;
    color: #666;
    text-align: right;
 }
 /* Editor Wrapper with Line Numbers */
 .editor-wrapper {
    position: relative;
    display: flex;
    height: 100%;
 }
 .line-numbers {
    min-width: 40px;
    padding: 8px 4px;
    background: #f8f8f8;
    border-right: 1px solid #ddd;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 13px;
    line-height: 1.4;
    color: #666;
    text-align: right;
    user-select: none;
    overflow: hidden;
 }
 .line-numbers.hidden {
    display: none;
 }
 .line-numbers .line-number {
    display: block;
    white-space: nowrap;
 }
 /* Adjust editor when line numbers are shown */
 .editor-wrapper #editor {
    flex: 1;
 }
 /* Theme support for find dialog */
 body.theme-dark .find-dialog {
    background: #2d2d2d;
    border-color: #555;
    color: #f0f0f0;
 }
 body.theme-dark .find-controls input {
    background: #333;
    border-color: #555;
    color: #f0f0f0;
 }
 body.theme-dark .find-controls button {
    background: #404040;
    border-color: #555;
    color: #f0f0f0;
 }
 body.theme-dark .find-controls button:hover {
    background: #4a4a4a;
 }
 body.theme-dark .line-numbers {
    background: #2a2a2a;
    border-right-color: #555;
    color: #888;
 }
 /* Additional theme support for line numbers */
 body.theme-solarized .line-numbers {
    background: #fdf6e3;
    border-right-color: #eee8d5;
    color: #93a1a1;
 }
 body.theme-monokai .line-numbers {
    background: #2f2f2f;
    border-right-color: #555;
    color: #75715e;
 }
 body.theme-github .line-numbers {
    background: #fafbfc;
    border-right-color: #e1e4e8;
    color: #586069;
 }
Author	SHA1	Message	Date
amitwh	dfb603c2ea	Fix v1.3.1: File associations and 50/50 pane layout - Enhanced file association handling for double-clicking .md files - Added proper file associations in package.json build config - Fixed preview/source pane layout to be equally distributed 50/50 - Updated CSS for tab-content structure with proper flex layout - Added theme support for new pane selectors - Improved command line argument processing for file opening - Updated version to 1.3.1 with file association feature	2025-09-01 21:05:01 +05:30
amitwh	fda173d9a1	Merge branch 'master' into macos	2025-09-01 20:58:00 +05:30
amitwh	ddababf284	Update README.md for v1.3.0 with tabbed interface and enhanced PDF export features	2025-09-01 20:54:47 +05:30
amitwh	376fa00b08	Merge branch 'master' into windows	2025-09-01 20:53:36 +05:30
amitwh	5cbcfa466d	Merge branch 'master' into macos	2025-09-01 20:53:29 +05:30
amitwh	328451f88d	Major v1.3.0 update: Fix PDF export, file associations, remove converter menu, and implement tabbed interface - Enhanced PDF export with multiple LaTeX engine fallbacks - Fixed file association and direct file opening from OS - Removed redundant converter menu, moved import to File menu - Implemented comprehensive tabbed interface for multiple files - Added tab management with keyboard shortcuts (Ctrl+N, Ctrl+W, Ctrl+Tab) - Enhanced UI with tab bar and improved navigation - Updated to version 1.3.0 with new features - Improved main process and renderer architecture for multi-file support	2025-09-01 20:53:17 +05:30
amitwh	1b10a39b15	Update to v1.2.1 with comprehensive editor enhancements	2025-09-01 20:36:57 +05:30
amitwh	7fe53b4b9c	Merge master with comprehensive v1.2.0 editor enhancements	2025-09-01 20:29:29 +05:30
amitwh	edb163eab4	Merge master with comprehensive v1.2.0 editor enhancements	2025-09-01 20:29:13 +05:30
amitwh	7131d1a38e	Merge master with comprehensive v1.2.0 editor enhancements	2025-09-01 20:28:49 +05:30
amitwhandClaude	6d3813e5e9	Major v1.2.0 editor enhancements - Add comprehensive Find & Replace with match highlighting - Add toggleable line numbers with theme support - Implement full undo/redo functionality with keyboard shortcuts - Add smart auto-indentation for lists and code blocks - Enhanced keyboard shortcuts for productivity - Advanced tab handling for indentation/outdentation - Updated About dialog with v1.2.0 and complete feature list - Add Find & Replace to Edit menu - Updated README.md with comprehensive feature documentation 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>	2025-09-01 20:26:58 +05:30
amitwh	bfe362245d	Update README.md with v1.2.0 features and remove CLAUDE.md	2025-09-01 20:08:14 +05:30
amitwh	0d21ddbf15	Update README.md with v1.2.0 features and remove CLAUDE.md	2025-09-01 20:07:47 +05:30
amitwh	7b5165bcb1	Update README.md with v1.2.0 features and remove CLAUDE.md	2025-09-01 20:07:13 +05:30
amitwh	5c5cffed83	Update README.md with v1.2.0 features and remove CLAUDE.md	2025-09-01 20:06:31 +05:30
amitwh	becfec5ae6	Update About dialog to version 1.2.0 with new features list	2025-09-01 20:03:36 +05:30
amitwh	bd38c5342d	Update About dialog to version 1.2.0 with new features list	2025-09-01 20:03:08 +05:30
amitwh	f3e829ca63	Update About dialog to version 1.2.0 with new features list	2025-09-01 20:02:44 +05:30
amitwhandClaude	b0a96f680a	Release v1.2.0: Major feature additions - Add PowerPoint export (PPTX/ODP) with slide-level formatting - Add comprehensive document conversion menu with import/export - Add interactive table creation helper in markdown editor - Update documentation with all new features and version history - Improve menu organization for better user experience 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>	2025-09-01 19:54:19 +05:30
amitwh	a6da95b057	Add spreadsheet export, update author info, rename to PanConverter - Added Excel (XLS/XLSX) and ODS export functionality - Updated author to Amit Haridas (amit.wh@gmail.com) - Renamed app from 'Pan Converter' to 'PanConverter' - Version bump to 1.1.0	2025-09-01 19:44:48 +05:30
amitwh	f17105aae7	Fix electron-store import error	2025-09-01 19:29:00 +05:30
amitwh	794d2125a5	Initial commit: Pan Converter - Cross-platform Markdown editor	2025-09-01 19:19:45 +05:30