v0.3.0 - Video Stabilization & Timeline Polish

Features

• Video stabilization — FFmpeg vidstab running in-browser via WASM. Tracks camera motion frame-by-frame and corrects it while extending edges (no resolution loss from zooming). User-controlled strength affects analysis precision and smoothing.
• Smooth slow motion — Optical flow frame interpolation for fluid slow-mo playback
• AI highlight extractor — Automatically detect key moments in footage
• Text behind subject — MediaPipe segmentation for text-behind-person effect
• Multi-language transcription — Subtitle generation with MOV file support
• Noise reduction — Audio enhancement workflow
• Playhead snap-to-edges — Playhead gently snaps to clip boundaries when dragging slowly; fast drags pass through unobstructed
• Visible trim handles — Selected clips show solid handles with grip indicator at both ends
• Preview zoom options — 50% and 75% zoom-out in preview controls
• Color picker transparency — Alpha channel support in color pickers
• Command-based editing — Full undo/redo history system

Fixes

• Smooth timeline scrubbing — RAF-throttled playhead drag with 50ms frame decode debounce
• Export includes stabilized video at max quality (-preset slow -crf 15)
• Only trimmed portion of clips is processed during stabilization
• Prevent decoder thrash during timeline scrubbing
• Properly isolate audio streams when separating tracks
• Fix SVG border artifacts during emphasis animations
• Detect multiple audio streams via FFmpeg probe fallback