feat(studio): keyframe system — parser, runtime, timeline UI, design panel, gesture recording#1311
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Add the runtime bridge layer: global time compilation (tween % → clip %), soft reload after mutations, runtime keyframe preview, and keyframe commit helper.
Add the runtime bridge layer: global time compilation (tween % → clip %), soft reload after mutations, runtime keyframe preview, and keyframe commit helper.
Add hooks for keyframe cache population (tween → clip-relative %), mutation dispatch, keyframe snapping, and audio beat detection.
Add dopesheet strip with diamond keyframe indicators, timeline property rows, keyboard navigation (J/Shift+J/Delete/K), and feature gate (STUDIO_KEYFRAMES_ENABLED defaults to false).
Add arc path controls (curviness slider, auto-rotate), motion path SVG overlay, ease curve visualization, stagger controls, and expanded animation card. Includes border-radius editor dependency from #1217.
Add gesture recording engine with RAF sampling, modifier key property mapping (Shift→rotationXY, Alt→rotation, Cmd→opacity), Ramer-Douglas-Peucker simplification, and ghost trail SVG overlay.
21 fixes: capture GSAP base at drag start, translate:none before gsap.set, skip reapplyPathOffsets for GSAP elements, clamp recording seek, _auto flag for 100% keyframes, overlay flash fix, block edits during recording.
Wire App.tsx recording orchestration, TimelineToolbar K/R buttons, PropertyPanel per-property diamonds, shortcuts panel, toast notifications, and keyframes guide documentation. All gated on STUDIO_KEYFRAMES_ENABLED (default false).
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Combined keyframe system stack (U2-U10). Includes:
Feature-gated behind STUDIO_KEYFRAMES_ENABLED (default false).