* feat(web): per-task color indicator in sidebar (localStorage)
Adds a color marker to tasks in the left task list for better visual
identification. Right-click a task → Color submenu picks one of seven
colors (or None to clear). Color renders as a 3px bar on the left edge
of the row and persists in localStorage.
* fix(web): address review feedback on task color indicator
- Filter storage events to TASK_COLORS_STORAGE_KEY so cross-tab writes
to unrelated keys no longer wake every TaskItem subscriber.
- Cache the parsed color map at module level, invalidated on writes and
cross-tab storage events. Avoids re-parsing localStorage on every
getSnapshot call (N tasks × N renders).
- Drop redundant typeof string check on Object.entries keys.
- Dim the colored bar to opacity-60 when not selected so colored rows
remain distinguishable from colored-and-selected rows at the left edge.
* refactor(web): remove test-only export from task-colors
Drop the __resetTaskColorsCacheForTests escape hatch from the
production module. Tests now invalidate the cache via a synthesized
cross-tab `storage` event, exercising the same listener path the
production code uses for real cross-tab updates.
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Co-authored-by: Kandev Agent <agent@kandev.dev>
João Salavisa