feat(studio): expose timeline treegrid semantics#2649
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This was referenced Jul 19, 2026
This was referenced Jul 19, 2026
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This was referenced Jul 19, 2026
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What
expose timeline treegrid semantics.
Why
Keep the virtualized timeline understandable and fully operable with keyboard and assistive technology.
How
Adds the focused selection, treegrid, roving-focus, or keyboard behavior in this stack layer.
Key files in this layer:
packages/studio/src/player/components/Timeline.test.tspackages/studio/src/player/components/Timeline.virtualization.test.tsxpackages/studio/src/player/components/TimelineLanes.tsxpackages/studio/src/player/components/TimelinePropertyLanes.tsxTest plan
Validated on the complete stacked tip with formatting, lint, Studio typecheck, the full production build, and the Studio test suite (2,946 passing; 18 todo). Focused timeline/thumbnail tests and browser QA cover the affected interaction path.
Post-Deploy Monitoring & Validation