Slice 22 — Proportional timeline UI + audio lane with gain controls#54
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Per-file beat grid cache, concatenated beat times for planning, and position-aware snap so beat sync works across clip boundaries and looped slides. Co-authored-by: Cursor <cursoragent@cursor.com>
Single-pass clip analysis, parallel media enumeration, cap beat/loudness math to 30s, batch cache updates, and defer expensive replanning while beat grid analysis runs. Co-authored-by: Cursor <cursoragent@cursor.com>
Use absolute Sequence placement for cut-only plans instead of TransitionSeries, binary-search beat snap, and startTransition when applying themes. Co-authored-by: Cursor <cursoragent@cursor.com>
Drop TransitionSeries for all previews, defer replanning, skip mass slide updates on theme change, and disable premount on large plans. Co-authored-by: Cursor <cursoragent@cursor.com>
…ssfade overlap. Cap transition overlap to actual slide duration and render only active composition entries so theme toggles stay responsive on long beat-synced timelines. Co-authored-by: Cursor <cursoragent@cursor.com>
Compute media and audio block positions from RenderPlan so the editor shell can render time-proportional lanes without duplicating planner logic. Co-authored-by: Cursor <cursoragent@cursor.com>
Cache min/max buckets and build symmetric SVG paths so audio clips can render iMovie-style waveforms at any zoom level. Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Replace the fixed-width filmstrip with media and audio lanes, playhead sync, zoom controls, and symmetric waveform rendering. Co-authored-by: Cursor <cursoragent@cursor.com>
Move clip reorder and gain controls to the timeline; sidebar keeps add-track and beat grid only. Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Re-add per-clip dB inputs and drag-reorder in Soundtrack. Timeline audio is visualization only with numbered clip boundaries — reordering multi-minute clips on the timeline was unusable at low zoom. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
TimelinePanel: media card widths scale with slide duration, audio lane shows iMovie-style symmetric waveforms with numbered clip boundaries, and a synced playhead with horizontal/vertical scroll.timelineLayoutmodule and high-resolution waveform peak cache.Closes #48
Test plan
pnpm testpnpm buildpnpm lintDEV_URL=http://localhost:5173/ node scripts/playwright-issue-48-smoke.mjshitl)Made with Cursor