This commit includes three critical bug fixes and Windows build improvements:
**Bug Fixes:**
1. **Queue Conversion Progress Tracking** (main.go:1471-1534)
- Enhanced executeConvertJob() to parse FPS, speed, and ETA from FFmpeg output
- Queue jobs now show detailed progress metrics matching direct conversions
- Stats stored in job.Config for display in the conversion stats bar
2. **AMD AMF Hardware Acceleration** (main.go)
- Added "amf" to hardware acceleration options
- Support for h264_amf, hevc_amf, and av1_amf encoders
- Added AMF-specific error detection in FFmpeg output parsing
3. **DVD Format Resolution Forcing** (main.go:1080-1103, 4504-4517)
- Removed automatic resolution forcing when DVD format is selected
- Removed -target parameter usage which was forcing 720×480/720×576
- Resolution now defaults to "Source" unless explicitly changed
- DVD compliance maintained through manual bitrate/GOP/codec parameters
**Windows Build Improvements:**
- Updated build.bat to enable CGO (required for Fyne/OpenGL)
- Added automatic GCC/MinGW-w64 detection and installation
- Automated setup via winget for one-command Windows builds
- Improved error messages with fallback manual instructions
**Documentation:**
- Added comprehensive Windows setup guides
- Created platform.go for future platform-specific code
- Updated .gitignore for Windows build artifacts
All changes tested and working. Ready for production use.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Features:
- FPS counter in conversion status showing real-time encoding speed
- Job queue now displays FPS, encoding speed (e.g., "1.2x"), and ETA for running conversions
- Copy Comparison button exports side-by-side metadata comparison report
- Auto-compare checkbox in Convert module - automatically loads Compare view after conversion
- Convert Now properly adds job to queue and displays in Job Queue with live stats
- Module badge colors in job queue now match main menu tile colors
- Fixed fullscreen compare window sizing (reduced player dimensions to prevent overflow)
Bug Fixes:
- Fixed queue state management - only one job runs at a time (prevents multiple jobs showing "running")
- Fixed Compare module slot assignment - single video drops now fill empty slot instead of overwriting
- Fixed job queue scroll rubber banding (no longer jumps back to top)
- Enhanced crop detection validation for WMV/AVI formats with dimension clamping and bounds checking
Documentation:
- VT_Player integration notes with API requirements for keyframing and trim features
- LosslessCut feature analysis for Trim module inspiration
- Video metadata guide covering MP4/MKV custom fields and NFO generation
- Trim module design specification
- Compare fullscreen mode documentation
- Updated VIDEO_PLAYER_FORK.md to mark fork as completed
Technical Changes:
- Added state tracking for FPS, speed, and ETA (main.go:197-199)
- Enhanced queue processJobs() to check for running jobs before starting new ones
- Improved Compare module drag-and-drop logic with smart slot assignment (both code paths)
- Added deferred scroll position restoration to prevent UI jumping
- Job queue Config map now carries conversion stats for display
🤖 Generated with Claude Code (https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Fixed thumbnails not displaying:
- Added preview frame generation to Compare module
- Thumbnails now load asynchronously when videos are loaded
- Uses capturePreviewFrames() just like Convert module
- Thumbnails appear after brief generation delay
Added Clear All button:
- Positioned to the right of instructions text
- Clears both File 1 and File 2 slots
- Refreshes view to show empty state
- Low importance styling (not highlighted)
Layout improvements:
- Instructions row now uses Border layout
- Clear All button aligned to the right
- Clean, accessible button placement
Both videos now show thumbnails (240x135) automatically
when loaded, providing visual confirmation of loaded content.
Fixed issue where dragging single videos would overwrite existing data:
Smart slot filling logic:
- Single video dropped: Fills first empty slot (File 1 then File 2)
- If both slots full: Shows dialog asking user to Clear first
- Multiple videos dropped: Fills both slots (replaces existing)
Behavior changes:
1. Drag first video → goes to slot 1
2. Drag second video → goes to slot 2
3. Drag third video → shows "Both Slots Full" message
4. Drag 2+ videos together → replaces both slots
User experience improvements:
- No more accidental overwrites when loading one at a time
- Clear feedback when slots are full
- Can now build comparison by dragging videos individually
- Or drag both at once to start fresh
Main menu drag-and-drop to Compare tile:
- Already working correctly
- Loads both videos sequentially then shows module
- No changes needed to that path
This makes the Compare workflow much more intuitive and prevents
losing loaded video data when adding the second video.
Fixed critical bug where loading second video would overwrite first:
- Changed parallel goroutines to sequential loading
- Load file 1, then file 2, then refresh UI once
- Prevents race condition from multiple showCompareView() calls
- Both files now display correctly side by side
Added action buttons for each file:
- Copy Metadata button: Copies formatted metadata to clipboard
- Clear button: Removes video from slot and refreshes display
- Buttons arranged horizontally: Load | Copy | Clear
- Low importance styling for secondary actions
Changes to drag-and-drop handlers:
- Within Compare module: sequential loading, single refresh
- From main menu: already sequential, no changes needed
- Both paths now work correctly
This fixes the "second file overwrites first" issue and adds
the requested metadata copy and clear functionality.
Fixed window resizing issues for better cross-platform behavior:
Convert module video pane:
- Reduced video pane minimum from 460x260 to 320x180
- Removed rigid MinSize on outer container (commented out)
- Removed rigid MinSize on image element
- Set stage minimum to 200x113 (reasonable 16:9 minimum)
- Video pane now scales down allowing smaller windows
Compare module:
- Reduced thumbnail minimum from 320x180 to 240x135
- Reduced metadata scroll minimum from 300x200 to 250x150
- More compact layout allows better window resizing
Benefits:
- Window can now shrink to fit smaller screens
- Better behavior on tiling window managers
- More flexible for cross-platform (Windows, macOS, Linux)
- Content scales intelligently instead of forcing window size
Note: Double-click titlebar maximize is a Fyne framework limitation.
Maximize via window controls or OS shortcuts (F11, Super+Up) works.
Added window centering to improve initial presentation:
- Call w.CenterOnScreen() after setting window size
- Window now opens centered rather than at OS default position
- Maintains existing resizing and maximization support
The window is already maximizable via SetFixedSize(false).
Users can maximize using OS window controls (double-click
titlebar, maximize button, or OS shortcuts like F11/Super+Up).
Prevents long filenames from manipulating window size:
- Truncate filenames longer than 35 characters
- Smart truncation preserves file extension
- Format: "long-filename-na...mp4" instead of wrapping
- Falls back to simple truncation for very long extensions
- Removed text wrapping from labels (no longer needed)
Examples:
- "my-very-long-video-filename.mp4" → "my-very-long-video-fi....mp4"
- "short.mp4" → "short.mp4" (unchanged)
- "filename.mkv" → kept as-is if under 35 chars
This ensures the Compare module labels stay compact and
predictable regardless of filename length.
Resolved UI framing issues where metadata was crushed and not
taking available vertical space:
Layout improvements:
- Used container.NewBorder to make metadata areas expand properly
- Set minimum sizes for scroll containers (300x200)
- Removed outer VScroll - individual metadata areas now scroll
- Grid columns now properly fill available vertical space
- Instructions fixed at top, metadata expands to fill remaining space
Text wrapping fixes:
- Added fyne.TextWrapBreak to file labels
- Prevents long filenames from stretching the window horizontally
- Labels now wrap to multiple lines as needed
Architecture changes:
- Separated file headers (label + button) from content
- Each column uses Border layout: header at top, metadata fills center
- Metadata scroll containers have explicit minimum sizes
- Two-column grid properly distributes horizontal space
The layout now feels more modern with better space utilization
and smooth scrolling within the metadata panels.
Major improvements to Compare module user experience:
- Auto-populate metadata when files are loaded (no Compare button needed)
- Show video thumbnails for both files (320x180)
- Support drag-and-drop onto Compare tile from main menu
- Load up to 2 videos when dropped on Compare tile
- Show dialog if more than 2 videos dropped
- Files loaded via drag show immediately with metadata
Changes to handleModuleDrop:
- Added special handling for Compare module
- Loads videos into compareFile1 and compareFile2 state
- Shows module with files already populated
Changes to buildCompareView:
- Added thumbnail display with dark background placeholders
- Created helper functions: formatMetadata(), loadThumbnail(), updateFile1(), updateFile2()
- Initialize view with any preloaded files
- Removed manual Compare button - metadata shows automatically
- Button handlers now call update functions to refresh display
- Cleaner, more intuitive workflow
This addresses the user feedback that dragging videos onto Compare
didn't load the module, and adds the requested thumbnail previews.
The Compare module now has colored bars at the top and bottom matching
its pink visual identity from the main menu. This creates visual
consistency with the Convert module and strengthens the app's
overall design language.
Changes:
- Added top bar with back button using ui.TintedBar
- Added bottom bar with module color
- Restructured layout to use container.NewBorder
- Made content area scrollable
The colored bars use the module's color (#FF44AA pink) as defined
in modulesList and retrieved via moduleColor().
- Implement drag-and-drop file loading in Compare module
- Accepts up to 2 video files
- Shows dialog if more than 2 videos dropped
- Automatically loads first two videos
- Integrated into global window drop handler
- Enhance metadata display with organized sections
- FILE INFO: path, file size, format
- VIDEO: codec, resolution, aspect ratio, frame rate, bitrate,
pixel format, color space, color range, field order, GOP size
- AUDIO: codec, bitrate, sample rate, channels
- OTHER: duration, SAR, chapters, metadata
- Both file panels now show identical detailed information
Critical Bug Fix:
- H.264 profile and level were being applied globally (-profile:v, -level:v)
- When cover art is present, this affected the PNG encoder stream
- PNG encoder doesn't support H.264 profiles, causing exit code 234
- Error: "Unable to parse option value 'main'" on PNG stream
Solution:
- Use stream-specific specifiers when cover art present
- Apply -profile✌️0 and -level✌️0 instead of -profile:v / -level:v
- This targets only the first video stream (main video)
- PNG cover art stream (1:v) is unaffected
- Fixed in both executeConvertJob() and startConvert()
UI Fix:
- Long output filenames were stretching the settings panel
- Added outputHint.Wrapping = fyne.TextWrapWord
- Filename now wraps properly instead of expanding horizontally
Tested with:
- Video with embedded cover art
- H.264 profile=main encoding
- Long filename conversion
This commit enhances the encoder preset selector with detailed information
about speed vs quality trade-offs for each preset option.
Preset Information:
- Ultrafast: ~10x faster than slow, ~30% larger files
- Superfast: ~7x faster than slow, ~20% larger files
- Very Fast: ~5x faster than slow, ~15% larger files
- Faster: ~3x faster than slow, ~10% larger files
- Fast: ~2x faster than slow, ~5% larger files
- Medium: Balanced baseline (default)
- Slow: ~2x slower than medium, ~5-10% smaller (recommended)
- Slower: ~3x slower than medium, ~10-15% smaller
- Very Slow: ~5x slower than medium, ~15-20% smaller
UI Enhancements:
- Dynamic hint label below encoder preset dropdown
- Updates automatically when preset changes
- Visual icons for different speed categories:
- ⚡ Ultrafast/Superfast/Very Fast (prioritize speed)
- ⏩ Faster/Fast (good balance)
- ⚖️ Medium (baseline)
- 🎯 Slow/Slower (recommended for quality)
- 🐌 Very Slow (maximum compression)
Implementation:
- updateEncoderPresetHint() function provides preset details
- Called on preset selection change
- Initialized with current preset on view load
- Positioned directly under preset dropdown for visibility
Benefits:
- Helps users understand encoding time implications
- Shows file size impact of each preset
- Recommends "slow" as best quality/size ratio
- Prevents confusion about preset differences
- Enables informed decisions about encoding settings
Technical:
- All presets already supported by FFmpeg
- No changes to command generation needed
- Works with all video codecs (H.264, H.265, VP9, etc.)
- Preset names match FFmpeg standards
This commit implements the frame rate conversion feature with intelligent
file size estimation and user guidance.
Frame Rate Options:
- Added all standard frame rates: 23.976, 24, 25, 29.97, 30, 50, 59.94, 60
- Maintained "Source" option to preserve original frame rate
- Replaced limited [24, 30, 60] with full broadcast standard options
- Supports both film (24 fps) and broadcast (25/29.97/30 fps) standards
Size Estimation:
- Calculates approximate file size reduction when downconverting
- Shows "Converting X → Y fps: ~Z% smaller file" hint
- Example: 60→30 fps shows "~50% smaller file"
- Dynamically updates hint when frame rate or video changes
- Only shows hint when conversion would reduce frame rate
User Warnings:
- Detects upscaling (target > source fps)
- Warns with ⚠ icon: "Upscaling from X to Y fps (may cause judder)"
- Prevents confusion about interpolation limitations
- No hint shown when target equals source
Implementation:
- updateFrameRateHint() function recalculates on changes
- Parses frame rate strings to float64 for comparison
- Calculates reduction percentage: (1 - target/source) * 100
- Updates automatically when video loaded or frame rate changed
- Positioned directly under frame rate dropdown for visibility
Technical:
- Uses FFmpeg fps filter (already implemented)
- Works in both direct convert and queue execution
- Integrated with existing frame rate handling
- No changes to FFmpeg command generation needed
Benefits:
- 40-50% file size reduction for 60→30 fps conversions
- Clear visual feedback before encoding
- Prevents accidental upscaling
- Helps users make informed compression decisions
This commit implements the highest priority dev13 feature: automatic
cropdetect with manual override capability.
Features:
- Added detectCrop() function that analyzes 10 seconds of video
- Samples from middle of video for stable detection
- Parses FFmpeg cropdetect output using regex
- Shows estimated file size reduction percentage (15-30% typical)
- User confirmation dialog before applying crop values
UI Changes:
- Added "Auto-Detect Black Bars" checkbox in Advanced mode
- Added "Detect Crop" button to trigger analysis
- Button shows "Detecting..." status during analysis
- Runs detection in background to avoid blocking UI
- Dialog shows before/after dimensions and savings estimate
Implementation:
- Added CropWidth, CropHeight, CropX, CropY to convertConfig
- Crop filter applied before scaling for best results
- Works in both direct convert and queue job execution
- Proper error handling for videos without black bars
- Defaults to center crop if X/Y offsets not specified
Technical Details:
- Uses FFmpeg cropdetect filter with threshold 24
- Analyzes last detected crop value (most stable)
- 30-second timeout for detection process
- Regex pattern: crop=(\d+):(\d+):(\d+):(\d+)
- Calculates pixel reduction for savings estimate
Benefits:
- 15-30% file size reduction with zero quality loss
- Automatic detection eliminates manual measurement
- Confirmation dialog prevents accidental crops
- Clear visual feedback during detection
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
This commit implements two new features:
1. Compare Module:
- New UI module for side-by-side video comparison
- Loads two video files and displays detailed metadata comparison
- Shows format, resolution, codecs, bitrates, frame rate, color info, etc.
- Accessible via GUI module button or CLI: videotools compare <file1> <file2>
- Added formatBitrate() helper function for consistent bitrate display
2. Target File Size Encoding Mode:
- New bitrate mode "Target Size" for convert module
- Allows users to specify desired output file size (e.g., "25MB", "100MB", "8MB")
- Automatically calculates required video bitrate based on:
* Target file size
* Video duration
* Audio bitrate
* Container overhead (3% reserved)
- Implemented ParseFileSize() to parse size strings (KB, MB, GB)
- Implemented CalculateBitrateForTargetSize() for bitrate calculation
- Works in both GUI convert view and job queue execution
Additional changes:
- Updated printUsage() to include compare command
- Added compare button to module grid with pink color
- Added compareFile1 and compareFile2 to appState
- Consistent "Target Size" naming throughout (UI and code)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Implements mutual exclusion between 'Convert Now' and queue processing:
Behavior:
- If queue is running: 'Convert Now' button is DISABLED
- If user tries to click 'Convert Now' while queue runs: Shows info dialog
with message and auto-adds video to queue instead
- Only one conversion method active at a time
This prevents:
- Multiple simultaneous FFmpeg processes competing for system resources
- Confusion about which conversion is running
- Queue and direct conversion interfering with each other
When queue is active:
- 'Convert Now' button: DISABLED (grey out)
- 'Add to Queue' button: ENABLED (highlighted)
- Clear UI signal: Only use queue mode for batch operations
Perfect for batch workflows where user loads multiple videos
and expects them all to process sequentially in the queue,
not spawn random direct conversions.
Implements automatic queue processing when jobs are added from the Convert
module via the 'Add to Queue' button:
Features:
- IsRunning() method added to queue package to check processing status
- 'Add to Queue' button now auto-starts queue if not already running
- Eliminates need to manually open Queue view and click 'Start Queue'
- Seamless workflow: Add video → Queue → Auto-starts conversion
Before:
1. Load video
2. Click 'Add to Queue'
3. Click 'View Queue'
4. Click 'Start Queue'
After:
1. Load video
2. Click 'Add to Queue' (auto-starts!)
3. Load next video
4. Click 'Add to Queue' (already running)
Perfect for batch operations where user loads multiple videos and expects
them to start encoding immediately.
Implements clear batch settings control for converting multiple videos:
Features:
- Settings persistence: All conversion settings automatically persist across videos
- Clear UI messaging: Explains that settings carry over between videos
- Reset button: One-click ability to reset all settings to defaults
- Batch workflow: Load video → set format/quality once → convert multiple videos
How it works:
1. User loads first video and configures settings (format, quality, codecs, etc)
2. Settings are stored in state.convert and persist across video loads
3. User can load additional videos - settings remain the same
4. When converting multiple videos, all use the same settings
5. User can change settings anytime - affects all subsequent videos
6. Reset button available to restore defaults if needed
This eliminates the need to reconfigure every video while allowing:
- Batch processing with same settings
- Individual video settings override when needed
- Clear visual indication of what's happening
Perfect for the user's workflow of converting 5 European videos to
DVD-NTSC format - set once, convert all 5!
Critical fix: When a DVD format (NTSC or PAL) is selected, now properly
override the video and audio codec to use DVD-compliant standards:
Video:
- Forces MPEG-2 codec (mpeg2video)
- NTSC: 6000k bitrate, 9000k max, gop=15
- PAL: 8000k bitrate, 9500k max, gop=12
Audio:
- Forces AC-3 codec for DVD container compatibility
- 192 kbps bitrate
- 48 kHz sample rate (DVD standard)
- Stereo channels (2)
This ensures that selecting a DVD format produces DVDStyler-compatible
MPEG files without codec errors. Previously, the code was using the
default H.264 + AAC, which caused 'unsupported audio codec' errors
when trying to write to MPEG container.
Fixes the issue where DVD conversions were failing with:
'Unsupported audio codec. Must be one of mp1, mp2, mp3, 16-bit pcm_dvd,
pcm_s16be, ac3 or dts.'
The setContent function was calling fyne.DoAndWait() from the main goroutine,
which created a deadlock. Changed to use fyne.Do() (asynchronous) to properly
marshal UI updates without blocking.
This resolves the error:
'fyne.Do[AndWait] called from main goroutine'
The async approach is correct here since we don't need to wait for the
content update to complete before continuing.
This commit includes several improvements:
Queue System Enhancements:
- Improved thread-safety in Add, Remove, Pause, Resume, Cancel operations
- Added PauseAll and ResumeAll methods for batch control
- Added MoveUp and MoveDown methods to reorder queue items
- Better handling of running job cancellation with proper state management
- Improved Copy strategy in List() to prevent race conditions
Convert Module Enhancement:
- Auto-set resolution to 720×480 when NTSC DVD format selected
- Auto-set resolution to 720×576 when PAL DVD format selected
- Auto-set framerate to 29.97fps (30) for NTSC, 25fps for PAL
- Added DVD resolution options to resolution selector dropdown
Display Server Improvements:
- Auto-detect Wayland vs X11 display servers in player controller
- Conditionally apply xdotool window placement (X11 only)
UI Improvements:
- Added Pause All, Resume All, and queue reordering buttons
- Fixed queue counter labeling (completed count display)
Added scripts folder with three convenience scripts:
• scripts/build.sh - Clean build with dependency verification
• scripts/run.sh - Run application (auto-builds if needed)
• scripts/alias.sh - Create 'VideoTools' command alias
Usage:
source scripts/alias.sh
VideoTools # Run app
VideoToolsRebuild # Force rebuild
VideoToolsClean # Clean artifacts
Fixed main.go DVD options:
• Fixed callback ordering so updateDVDOptions is called on format selection
• DVD aspect ratio selector now appears when DVD format is selected
• DVD info display shows specs for NTSC and PAL formats
• Works in both Simple and Advanced tabs
DVD options are now fully functional in the UI.
Integrated DVD-NTSC and DVD-PAL options into the Convert module's Simple and Advanced modes.
New Features:
✓ DVD-NTSC (720×480 @ 29.97fps) option in format selector
✓ DVD-PAL (720×576 @ 25.00fps) option in format selector
✓ DVD aspect ratio selector (4:3 or 16:9)
✓ Dynamic DVD options panel - appears only when DVD format selected
✓ Informative DVD specs displayed based on format selection
✓ Smart show/hide logic for DVD-specific controls
✓ Works in both Simple and Advanced mode tabs
DVD Specifications Displayed:
- NTSC: 720×480 @ 29.97fps, MPEG-2, AC-3 Stereo 48kHz
- PAL: 720×576 @ 25.00fps, MPEG-2, AC-3 Stereo 48kHz
- Bitrate ranges and compatibility info
Users can now:
1. Select DVD format from dropdown
2. Choose aspect ratio (4:3 or 16:9)
3. See relevant DVD specs and compatibility
4. Queue DVD conversion jobs
5. Process with existing queue system
🤖 Generated with Claude Code
Simplified the approach by removing complex callback logic and using a
simple 500ms timer-based update for the stats bar instead. This eliminates
threading errors completely while keeping the code straightforward.
Changes:
1. Removed queue change callback entirely
2. Added background timer that updates stats bar every 500ms
3. Removed initComplete flag (no longer needed)
4. Simplified setContent() to direct calls
5. Added onClearAll parameter to BuildQueueView()
6. Added ClearAll() method to Queue (removes all jobs)
7. Added Clear All button with DangerImportance styling in queue view
8. Clear Completed button now has LowImportance styling
This approach is much simpler: the UI just polls the queue state
periodically instead of trying to handle callbacks from goroutines.
No more threading errors, less code, easier to understand.
🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>
The threading errors were caused by queue callbacks triggering showMainMenu()
during app initialization, before the Fyne event loop was fully ready.
Changes:
1. Added initComplete flag to appState struct
2. Queue callback returns early if !initComplete, preventing UI updates
during initialization
3. Set initComplete=true AFTER ShowAndRun() would handle the event loop
4. Removed nested DoFromGoroutine() which was causing double-wrapping
5. Simplified setContent() to direct calls (no thread wrapping)
6. Callback properly marshals UI updates via DoFromGoroutine() after init
This ensures the queue callback only affects UI after the app is fully
initialized and the Fyne event loop is running.
🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>
The queue callback was triggering showMainMenu() from a goroutine (the
job processor) without marshaling to the main thread. This caused the
threading error "should have been called in fyne.Do[AndWait]".
Changes:
1. Queue callback now wraps all UI updates in app.Driver().DoFromGoroutine()
to safely marshal calls from the job processor goroutine to the main thread
2. setContent() now always uses DoFromGoroutine() to ensure thread safety
regardless of caller context. This prevents errors when called from
callbacks or other goroutines.
3. Added fallback for early initialization when app driver isn't ready yet
This ensures all UI updates happen on the main Fyne event loop thread.
🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>
Implemented three methods to add multiple videos to the queue:
1. **Drag from main menu**: When on the main menu, dragging multiple videos
onto the Convert tile automatically adds them all to the queue via
batchAddToQueue(). Already working - improved handling.
2. **Drag onto convert module**: When in the convert module, dragging
multiple video files now adds all of them to the queue instead of just
loading the first one. Single files are loaded as before.
3. **UI button support**: Added 'Add Multiple...' button next to 'Open File...'
to make it clear that users can load multiple files.
Changes:
- handleDrop(): Refactored to process all dropped files when in convert module
and call batchAddToQueue() for multiple videos
- buildVideoPane(): Added 'Add Multiple...' button and reorganized button
layout to show both single and batch options
This provides intuitive multi-file handling with three different workflows
for users who prefer different input methods.
🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>
