feat(studio): add timeline keyboard controls#2715
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This was referenced Jul 21, 2026
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This was referenced Jul 21, 2026
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What
Family F — Accessible navigation.
Add keyboard controls and roving focus for timeline clips, disclosure rows, keyframe diamonds, and midpoint easing controls.
Why
Every timeline operation should remain usable without pointer input, including dense and out-of-clip keyframe lanes.
How
Add the keyboard actor, time-based accessible labels, native keyframe selection semantics, and focus-visible easing controls. The integration keeps connectors visually gapped around dense diamonds and preserves boundary-aware marker hit targets from the underlying interaction stack.
Test plan
Validated with 200 focused timeline/navigation tests, 3,012 full Studio tests, Studio typecheck, format, lint, file-size gate, and full workspace build.