Reuses the existing FilterPills component and sub-filter mechanism from sectionGroup views. Adds countAllByFilter helper for counting across all entry types and extends filterByKind to support subFilter for the 'all' filter. Bulk actions automatically adapt based on active pill. Switching pills resets multi-selection. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>