immich/web/src/lib/managers/timeline-manager
Min Idzelis f1e03d0022
fix(web): improve scrubber behavior on scroll-limited timelines (#22917)
Improves scroll indicator positioning when scrubbing through timelines with limited scrollable content (e.g., small albums). When a timeline's scrollable height is less than 50% of the viewport height, the scroll position is now properly distributed across the entire scrubber height, making the indicator more responsive and accurate.

Changes:
- Add `limitedScroll` state to detect scroll-constrained timelines (threshold: 50%)
- Introduce `ViewportTopMonth` type to handle lead-in/lead-out sections
- Calculate `totalViewerHeight` including top/bottom sections for accurate positioning
- Refactor scrubber to treat lead-in and lead-out as distinct scroll segments
- Update scroll position calculations to use relative percentages on constrained timelines
2025-10-15 13:13:05 -04:00
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