Address all QA review warnings and suggestions for entity pages
Warnings fixed:
- 3.1: _compute_display_name stale-data bug on all-names-clear
- 3.3: Location getValue unsafe type cast replaced with typed helper
- 3.5: Explicit updated_at timestamp refresh in locations router
- 3.6: Drop deprecated relationship column (migration 021, model, schema, TS type)
Suggestions fixed:
- 4.1: CategoryAutocomplete keyboard navigation (ArrowUp/Down, Enter, Escape)
- 4.2: Mobile detail panel backdrop click-to-close on both pages
- 4.3: PersonCreate whitespace bypass in require_some_name validator
- 4.5/4.6: Extract SortIcon, DataRow, SectionHeader from EntityTable render body
- 4.8: PersonForm sends null instead of empty string for birthday
- 4.10: Remove unnecessary executeDelete wrapper in EntityDetailPanel
Also includes previously completed fixes from prior session:
- 2.1: Remove Z suffix from naive timestamp in formatUpdatedAt
- 3.2: Drag-then-click conflict prevention in SortableCategoryChip
- 3.4: localStorage JSON shape validation in useCategoryOrder
- 4.4: Category chip styling consistency (both pages use inline hsl styles)
- 4.9: restrictToHorizontalAxis modifier on CategoryFilterBar drag
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>