b0b4cd0c97
- Add spatial search module for finding users/objects by name - Add js/spatial-search.js with search functionality - Add tests (9 tests, all passing) - Add script to index.html Features: 1. Search by name with autocomplete 2. Distance calculation 3. Direction indicator (N/S/E/W/NE/SE/SW/NW) 4. Pathfinding arrow on HUD 5. Keyboard shortcut (Ctrl+F / Cmd+F) Addresses issue #1540: feat: spatial search — find nearest user/object by name Usage: - Open search: Ctrl+F or Cmd+F - Type name to search - Select result to see direction arrow - Arrow points to selected entity Tested: - Entity registration/unregistration - Position updates - Distance calculation - Direction calculation - Search functionality