Tried it, didn't add value beyond what the date-grouped timeline
already gives. The grouped, sticky-headered timeline (which kicks
in by default whenever sortBy is taken_at) is the better
affordance for date navigation — duplicating that as a sidebar
drilldown was just clutter.
Removes the full stack:
- LeftSidebar: by-date tree node, byDateChildren computation,
date-year-/date-month- handlers in applyLibraryNode, isItemActive
branches that matched a date-range filter, the now-unused
setDateFrom/setDateTo/filterDateFrom/filterDateTo selectors, and
the Calendar icon import.
- frontend/src/hooks/useDateBucketsQuery.ts deleted entirely.
- api.ts: library.dateBuckets helper and DateBucketYear/Month types.
- backend/app/routers/library.py: GET /library/date_buckets endpoint
and its strftime aggregation query.
The dateFrom/dateTo filter state stays in filterStore — the
FilterBar still uses it for the "Date" range inputs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>