Sync property list with map viewport

Major changes:
- Property list now updates when map pans/zooms
- Properties sorted by distance from map center (closest first)
- Shows "X properties in view" when viewport filtering active
- Min 30 properties required before grouping kicks in
- Added rule to CLAUDE.md: no commits unless asked

Backend:
- MLS_Query: Added bounds filtering and distance-based sorting
- AJAX handler: Accepts bounds/center, sorts by distance when provided

Frontend:
- Map move triggers property list refresh with same viewport
- Loop prevention flag to avoid map->filter->map recursion
- Resets to page 1 when viewport changes

Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -12,6 +12,7 @@ Custom WordPress theme for HomeProz Real Estate (Albert Lea, MN). Dark/rust bran
 6. **Server-side render** - no client-side templating
 7. **No custom animations** - keep it static and fast
 8. **ASK before architectural decisions**
+9. **No git commits unless asked** - commits are for checkpoints before major work or major milestones, not for small single-file changes
 
 ## Build