6e7f000e1c
Add Started and Finished DateRangePicker widgets to the PlayEvent filter bar and wire filter-started / filter-ended into the filter-bar date-range serializer, so the started/ended DateCriterion fields (added for #67) are reachable from the UI — enabling "finished in year Y" range filtering. Builds on #67 (PlayEventFilter.started/ended are DateCriterion); the bare field names round-trip through _parse_range like the Purchase date fields. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>