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-# Yoga TUI to Fyne GUI Migration Plan
-
-## Overview
-Convert the existing Yoga TUI application (built with Bubble Tea) to a Fyne-based GUI application while maintaining all existing features and adding video preview thumbnails.
-
-## Current Features
-- Video browsing table (name, duration, age, tags)
-- Multi-filter system (name substring, duration range, tag substring)
-- Multi-column sorting (name, duration, age)
-- VLC playback with optional crop aspect ratio
-- Tag editing via JSON files per video
-- Duration probing with ffprobe + caching
-- Random video selection
-- Re-index functionality
-- Progress indicators
-
-## Package Structure
-
-### Existing (to be kept/reused)
-```
-internal/fsutil/          # Path utilities
-internal/meta/            # Version
-internal/tags/            # Tag persistence
-internal/app/             # Domain logic
-├── video.go              # Video struct (extend for thumbnails)
-├── loader.go             # Video loading (extend for thumbnails)
-├── filters.go            # Filter logic
-├── model_sort.go         # Sorting logic
-├── duration_cache.go     # Duration caching
-├── tag_commands.go       # Tag operations
-└── model_tags.go         # Tag editing
-```
-
-### New packages
-```
-internal/gui/             # GUI-specific code
-├── app.go                # Fyne app lifecycle
-├── main_window.go        # Main window + layout
-├── video_list.go         # Video list widget
-├── preview_panel.go      # Video preview thumbnails
-├── filter_dialog.go      # Filter UI
-├── tag_dialog.go         # Tag editing UI
-├── status_bar.go         # Status display
-└── thumbnail_cache.go    # Preview image caching
-
-internal/thumbnail/        # Thumbnail generation
-├── generator.go          # ffmpeg-based thumbnail extraction
-├── cache.go              # Thumbnail file management
-└── config.go             # Thumbnail settings
-```
-
-### To be removed
-```
-internal/app/
-├── app.go                # Bubble Tea program
-├── model.go              # TUI model state
-├── style.go              # Terminal styling
-├── messages.go           # Bubble Tea messages
-├── view_helpers.go       # TUI rendering
-├── model_keys.go         # TUI key handlers
-├── model_durations.go    # Duration UI updates (adapt)
-└── options.go            # Keep but may need updates
-```
-
-## Data Model Extensions
-
-### internal/app/video.go
-```go
-type video struct {
-    Name               string
-    Path               string
-    Duration           time.Duration
-    ModTime            time.Time
-    Size               int64
-    Tags               []string
-    Thumbnail          string         // Path to thumbnail image
-    ThumbnailGenerated bool            // Generation status
-}
-```
-
-## Phase 1: Foundation & Architecture
-
-### 1.1 Dependency Migration
-- [ ] Add fyne.io/fyne/v2 to go.mod
-- [ ] Remove charmbracelet/bubbletea dependencies
-- [ ] Test basic Fyne application runs
-
-### 1.2 Package Structure Setup
-- [ ] Create internal/gui/ package
-- [ ] Create internal/thumbnail/ package
-- [ ] Move reusable domain logic to proper packages
-
-### 1.3 Data Model Updates
-- [ ] Add thumbnail fields to video struct
-- [ ] Update video struct comments
-- [ ] Ensure backward compatibility with existing tests
-
-## Phase 2: Thumbnail System
-
-### 2.1 Thumbnail Generation
-- [ ] Implement internal/thumbnail/generator.go
-  - ffmpeg command to extract frame at 10% duration
-  - Output JPEG thumbnails (320x180 or auto-detect)
-  - Error handling for missing ffmpeg
-- [ ] Unit tests for thumbnail generation logic
-- [ ] Integration tests with mock ffmpeg
-
-### 2.2 Thumbnail Cache
-- [ ] Implement internal/thumbnail/cache.go
-  - Check thumbnail existence before generation
-  - Cache metadata: .video_thumbnails.json
-  - ModTime detection for regeneration
-- [ ] Unit tests for cache logic
-
-### 2.3 Integration with Video Loading
-- [ ] Extend internal/app/loader.go to check/generate thumbnails
-- [ ] Add background goroutine for thumbnail generation
-- [ ] Update video loading tests
-
-## Phase 3: GUI Main Window
-
-### 3.1 Window Layout
-- [ ] Implement internal/gui/app.go
-  - Fyne app initialization
-  - Window creation and lifecycle
-- [ ] Implement internal/gui/main_window.go
-  - Split container (preview + list)
-  - Responsive layout
-- [ ] Implement internal/gui/status_bar.go
-  - Status display widget
-  - Progress indicators
-
-### 3.2 Video List Widget
-- [ ] Implement internal/gui/video_list.go
-  - Custom widget.List with thumbnails
-  - Click to select, double-click to play
-  - Highlight selected item
-- [ ] Handle keyboard navigation
-- [ ] Performance testing with large collections
-
-### 3.3 Thumbnail Preview Panel
-- [ ] Implement internal/gui/preview_panel.go
-  - Large thumbnail display
-  - Video metadata labels
-  - Action buttons (Play, Edit Tags)
-
-## Phase 4: Interactive Components
-
-### 4.1 Filter Dialog
-- [ ] Implement internal/gui/filter_dialog.go
-  - dialog.NewForm() with name, min/max duration, tags
-  - Real-time filter count
-  - Apply/Cancel buttons
-- [ ] Reuse internal/app/filters.go logic
-
-### 4.2 Tag Editor Dialog
-- [ ] Implement internal/gui/tag_dialog.go
-  - dialog.NewForm() with tag entry
-  - Current tags display
-  - Save/Cancel buttons
-- [ ] Reuse internal/tags/ package
-
-### 4.3 Sort Options
-- [ ] Implement sort menu
-  - Sort by Name/Duration/Age
-  - Ascending/Descending toggle
-- [ ] Reuse internal/app/model_sort.go logic
-
-## Phase 5: Background Operations
-
-### 5.1 Goroutine Management
-- [ ] Implement async video loading
-- [ ] Implement async thumbnail generation
-- [ ] Implement async duration probing
-- [ ] Use Fyne's WorkerPool for CPU-bound tasks
-
-### 5.2 UI Updates from Background
-- [ ] Implement callback pattern for UI updates
-- [ ] Ensure all UI updates on main thread
-- [ ] Handle cancellation on window close
-
-## Phase 6: Integration & Polish
-
-### 6.1 Keyboard Shortcuts
-- [ ] Ctrl+F - Filter dialog
-- [ ] Ctrl+T - Edit tags
-- [ ] Ctrl+R - Random video
-- [ ] Ctrl+I - Re-index
-- [ ] Enter - Play selected
-- [ ] Delete - Clear filters
-
-### 6.2 Window Management
-- [ ] Save/restore window size
-- [ ] Save/restore split pane position
-- [ ] Use Fyne storage preferences API
-
-### 6.3 Error Handling
-- [ ] Dialog boxes for missing dependencies
-- [ ] Graceful degradation on thumbnail failures
-- [ ] User-friendly error messages
-
-## Phase 7: Testing & Documentation
-
-### 7.1 Testing
-- [ ] Unit tests for all new GUI components
-- [ ] Integration tests for video loading with thumbnails
-- [ ] Mock external commands (ffmpeg, ffprobe, vlc)
-- [ ] Maintain 85%+ code coverage
-
-### 7.2 Documentation
-- [ ] Update README.md with GUI usage
-- [ ] Add GUI screenshots
-- [ ] Document thumbnail cache location
-- [ ] Update keyboard shortcuts documentation
-
-## Technical Considerations
-
-### Fyne-Specific Challenges
-1. **Async UI Updates** - All UI updates must be on main thread
-2. **Image Loading** - Lazy loading with LRU cache
-3. **List Performance** - Widget.List is already virtualized
-4. **Cross-Platform** - Detect ffmpeg/ffprobe/vlc at runtime
-
-### Code Reuse Strategy
-**Keep 100% of:**
-- internal/fsutil - Path utilities
-- internal/meta - Version
-- internal/tags - Tag persistence
-- internal/app/loader.go - Video collection (extend)
-- internal/app/filters.go - Filter logic
-- internal/app/model_sort.go - Sorting logic
-- internal/app/duration_cache.go - Duration caching
-
-**Remove 100% of:**
-- All Bubble Tea code
-- Terminal-specific styling (internal/app/style.go)
-- TUI model state management
-
-**Adapt:**
-- internal/app/video.go - Add thumbnail field
-- internal/app/model_durations.go - Adapt for GUI updates
-- internal/app/model_tags.go - Reuse tag commands
-- cmd/yoga/main.go - Replace TUI init with Fyne app
-
-## Dependencies
-
-### New Dependencies
-```go
-require (
-    fyne.io/fyne/v2 v2.4.0
-)
-```
-
-### System Requirements
-- ffmpeg (for thumbnails)
-- ffprobe (already used for duration)
-- vlc (for playback)
-
-## Timeline
-
-- **Week 1:** Phase 1 - Foundation & Architecture
-- **Week 2:** Phase 2 - Thumbnail System
-- **Week 3:** Phase 3 - GUI Main Window
-- **Week 4:** Phase 4 - Interactive Components
-- **Week 5:** Phase 5 - Background Operations
-- **Week 6:** Phase 6 - Integration & Polish
-- **Week 7:** Phase 7 - Testing & Documentation
-
-## Build Commands
-
-```bash
-# Build
-mage build
-
-# Test
-mage test
-
-# Coverage
-mage coverage
-
-# Install
-mage install
-```
-
-## Git Commit Milestones
-
-1. Phase 1 complete: Foundation and architecture
-2. Phase 2 complete: Thumbnail system
-3. Phase 3 complete: Main window
-4. Phase 4 complete: Interactive components
-5. Phase 5 complete: Background operations
-6. Phase 6 complete: Integration and polish
-7. Phase 7 complete: Testing and documentation
-8. Final: Release-ready GUI application