- New areas and business_areas tables (migration 20261025120001).
- /areas page to add, rename, merge and delete areas (AreasController,
  AreaRepository), registered in the controller allow-list and nav.
- Business detail: area badges, tick existing areas or add new ones
  (comma-separated) when saving details.
- Businesses list: Area filter (any / none / specific) and a sortable
  Areas column (sorts by each business's first area alphabetically).
- CSV export: Areas column; respects the area filter.
- Area ids inside subqueries are inlined as CLng because Access binds
  ? markers in subqueries ahead of outer ones.
- run_site.cmd: use 64-bit IIS Express to match the installed 64-bit
  ACE provider (fixes "Provider cannot be found", 3706).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>