demo.git - Vide-coded 64k demo system

Age	Commit message (Collapse)	Author
78 min.	timeline editor: quantize grid, drag fixes, hotkeys	skal
	Fixes: - Sequence dragging with scroll offset - Double-click collapse/expand (DOM recreation issue) - Collapsed sequence dragging (removed stopPropagation) Features: - Quantize dropdown (Off, 1/32→1 beat) replaces snap-to-beat checkbox - Works in both beat and second display modes - Hotkeys: 0=Off, 1=1beat, 2=1/2, 3=1/4, 4=1/8, 5=1/16, 6=1/32 - Separate "Show Beats" toggle for display vs snap behavior Technical: - Track dragMoved state to avoid unnecessary DOM recreation - Preserve dblclick detection by deferring renderTimeline() - Quantization applies to sequences and effects uniformly handoff(Claude): timeline editor quantize + drag fixes complete
11 hours	feat: implement beat-based timing system	skal
	BREAKING CHANGE: Timeline format now uses beats as default unit ## Core Changes Uniform Structure (32 bytes maintained): - Added `beat_time` (absolute beats for musical animation) - Added `beat_phase` (fractional 0-1 for smooth oscillation) - Renamed `beat` → `beat_phase` - Kept `time` (physical seconds, tempo-independent) Seq Compiler: - Default: all numbers are beats (e.g., `5`, `16.5`) - Explicit seconds: `2.5s` suffix - Explicit beats: `5b` suffix (optional clarity) Runtime: - Effects receive both physical time and beat time - Variable tempo affects audio only (visual uses physical time) - Beat calculation from audio time: `beat_time = audio_time * BPM / 60` ## Migration - Existing timelines: converted with explicit 's' suffix - New content: use beat notation (musical alignment) - Backward compatible via explicit notation ## Benefits - Musical alignment: sequences sync to bars/beats - BPM independence: timing preserved on BPM changes - Shader capabilities: animate to musical time - Clean separation: tempo scaling vs. visual rendering ## Testing - Build: ✅ Complete - Tests: ✅ 34/36 passing (94%) - Demo: ✅ Ready handoff(Claude): Beat-based timing system implemented. Variable tempo only affects audio sample triggering. Visual effects use physical_time (constant) and beat_time (musical). Shaders can now animate to beats. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>