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Vance IngallsandClaude Opus 5
420035e42a
Adds the data model behind Ableton-style automation lanes: breakpoint envelopes over track volume or one knob of one effect in the track's FX chain, stored on the element as `data-automation`. Times are clip-local, so an envelope travels with the clip when it moves — the clip-envelope model rather than arrangement automation. `sampleAutomationLane` is the single interpolator. The lane drawing, the preview scheduler and the render bake all call it, so the picture and the sound cannot disagree about the curve. Log-scaled parameters interpolate in log space, matching what their own knob already promises. FX nodes gain a stable `id`, minted by count rather than randomly so the document is the same on every machine. Lanes address nodes by id, so reordering a chain never re-points a lane at a different effect, and a lane whose effect was deleted is dropped rather than left to reattach. Also warns when a track carries both a volume lane and a GSAP volume tween, since only the lane is heard and the tween silently does nothing. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>