refactor(studio): decompose timeline orchestration#2636
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This was referenced Jul 19, 2026
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This was referenced Jul 19, 2026
This was referenced Jul 19, 2026
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What
decompose timeline orchestration.
Why
Give timeline interactions one explicit lifecycle and keep rendering responsibilities small enough to optimize safely.
How
Extracts the lifecycle or rendering contract into a focused owner while preserving existing timeline behavior.
Key files in this layer:
packages/studio/src/player/components/Timeline.tsxpackages/studio/src/player/components/timelineViewModel.tspackages/studio/src/player/components/useTimelineSelectionLifecycle.tspackages/studio/src/player/components/useTimelineShiftModifier.tsTest 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