[x] 1. Set up project structure and core HTML foundation
- Create index.html with semantic structure for the main application layout
- Set up Tailwind CSS integration and custom CSS variables from Figma design
- Create basic HTML structure for header, input section, video list, and control panel
- Requirements: 2.1, 5.1, 5.2, 5.3
[x] 2. Implement header component with exact Figma styling
- Create header HTML structure with app logo, title, and window controls
- Apply exact Figma color values and typography using Tailwind classes
- Add SVG icons for logo and window control buttons
- Requirements: 2.1, 5.1, 5.2, 5.3, 5.4
[x] 3. Build URL input section with interactive elements
- Create textarea for YouTube URL input with placeholder text
- Implement "Add Video" and "Import URLs" buttons with proper styling
- Add save path selector, quality dropdown, and format dropdown components
- Apply exact spacing, colors, and border radius from Figma design
- Requirements: 1.1, 2.1, 3.1, 5.1, 5.2, 5.3, 5.4
[x] 4. Create video list table structure and styling
- Build grid-based table layout with proper column structure
- Create video item component template with thumbnail, title, duration, and controls
- Implement responsive grid system matching Figma layout specifications
- Add proper spacing and alignment for all table elements
- Requirements: 2.1, 3.1, 5.1, 5.2, 5.3, 5.4
[x] 5. Implement status badges with integrated progress display
- Create status badge component with color-coded states (Ready, Downloading, Converting, Completed, Error)
- Integrate progress percentage directly into status badges for downloading/converting states
- Apply exact color values from Figma for each status state
- Add proper typography and spacing for status text and progress percentages
- Requirements: 1.4, 4.1, 4.2, 4.3, 5.1, 5.2, 5.3, 5.4
[x] 6. Build control panel with action buttons
- Create bottom control panel with "Clear List", "Update Dependencies", "Cancel Downloads" buttons
- Implement "Download Videos" primary action button
- Add status message area for user feedback
- Apply exact button styling, colors, and spacing from Figma
- Requirements: 1.2, 2.1, 4.4, 5.1, 5.2, 5.3, 5.4
[x] 7. Implement JavaScript state management and data models
- Create Video object model with all required properties (id, url, title, thumbnail, etc.)
- Implement application state management for videos array and configuration
- Add functions for adding, removing, and updating video objects
- Create utility functions for URL validation and format handling
- Requirements: 1.1, 1.5, 3.1, 3.2
[x] 8. Add URL validation and video addition functionality
- Implement YouTube/Vimeo URL validation with regex patterns
- Create function to extract video information from URLs
- Add video to list functionality with proper error handling
- Display validation errors for invalid URLs
- Requirements: 1.1, 1.5, 3.1, 4.3
[x] 9. Implement interactive dropdown menus for quality and format selection
- Create dropdown components for quality selection (720p, 1080p, 4K, etc.)
- Build format selection dropdown (None, H264, ProRes, DNxHR, Audio only)
- Add event handlers for dropdown value changes
- Update video object properties when selections change
- Requirements: 3.1, 3.2, 3.3
[x] 10. Integrate Electron IPC for desktop app functionality
- Connect renderer process to main process via secure IPC channels
- Implement file system operations (save directory selection, cookie file selection)
- Add binary version checking and management through main process
- Create secure communication layer for video download operations
- Requirements: 1.1, 1.2, 3.1, 4.1
[x] 11. Implement real video download functionality with yt-dlp integration
- Connect to yt-dlp binary through main process for actual video downloads
- Implement progress tracking with real download progress from yt-dlp output
- Add status transitions (Ready → Downloading → Converting → Completed)
- Handle video metadata extraction and thumbnail fetching
- Requirements: 1.2, 1.4, 4.1, 4.2
[x] 12. Add format conversion with ffmpeg integration
- Integrate ffmpeg binary for video format conversion (H264, ProRes, DNxHR)
- Implement audio-only extraction functionality
- Add conversion progress tracking and status updates
- Handle format-specific encoding parameters and quality settings
- Requirements: 3.2, 3.3, 4.1, 4.2
[x] 13. Implement desktop-native file operations and error handling
- Add native file dialogs for save directory and cookie file selection
- Implement error states for failed downloads with proper error messages
- Create desktop notification system for download completion
- Handle binary missing scenarios and dependency management
- Requirements: 1.5, 4.3, 4.4
[x] 14. Add bulk actions and desktop app features
- Implement "Clear List" functionality to remove all videos
- Create "Cancel Downloads" feature to stop active download processes
- Add video selection with checkboxes for bulk operations
- Implement drag-and-drop reordering functionality for video list
- Requirements: 1.2, 4.4
[x] 15. Add desktop app accessibility and keyboard navigation
- Implement full keyboard navigation for all interactive elements
- Add proper ARIA labels and descriptions for screen readers
- Create focus management system with visible focus indicators
- Add live regions for status announcements during downloads
- Requirements: 2.2, 2.3
[ ] 16. Create comprehensive test suite and final integration
- Write unit tests for URL validation and desktop app functions
- Create integration tests for complete download workflow with binaries
- Add Electron main/renderer process communication tests
- Test cross-platform compatibility (macOS, Windows, Linux)
- Requirements: 1.1, 1.2, 1.4, 1.5, 3.1, 3.2, 3.3, 4.1, 4.2, 4.3, 4.4
[ ] 17. Final desktop app polish and distribution
- Integrate all components into cohesive Electron application
- Apply final styling adjustments to match Figma design exactly
- Optimize performance for desktop environment
- Prepare app for distribution (code signing, packaging)
- Requirements: 1.1, 1.2, 1.4, 1.5, 2.1, 2.2, 2.3, 3.1, 3.2, 3.3, 4.1, 4.2, 4.3, 4.4, 5.1, 5.2, 5.3, 5.4