Beat grid across multi-clip timeline#53
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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>
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Summary
beatGridCachewith legacy migration; concatenated beat times + position-aware snap across clips and looped slidesCloses #49
Test plan
pnpm test,pnpm lint,pnpm buildnode scripts/playwright-folder-load-smoke.mjs(withpnpm dev)