Add T9 modal system update

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@@ -23,6 +23,14 @@ Mobile-first web app for tracking physical assets via barcode scanning, OCR stic
 - Replaced 3 native `prompt()` calls: geofence naming (2x), database reset confirmation (1x)
 - 7 Playwright E2E tests passing
 
+### T6 Map Page Improvements — May 2026
+- **Marker clustering** — Leaflet.markercluster groups dense asset pins, spiderfies on click
+- **Real GPS heatmap** — Heatmap layer now uses actual check-in GPS coordinates (was placebo based on visit counts)
+- **Dismissible GPS warning** — ✕ button on GPS error badge, with "re-enable" option later
+- **Address geocoding fallback** — When GPS is denied, geocodes asset addresses to get lat/lng for map pins
+- **Map legend** — Color-coded legend showing asset category markers (Furniture, Appliances, Equipment, etc.)
+- **Modal fixes** — Prompt area and actions container properly integrated into modal HTML
+
 ### T5 Dashboard Fixes — May 2026
 - **Active Technicians** now queries `users WHERE role='technician'` (was counting from visit data — showed 0 when no visits yet)
 - **Interactive bar charts** — hover shows label + count tooltip; click drills down to filtered asset list (Category, Status, Make)
@@ -85,6 +93,8 @@ When building_number is entered in the manual asset form or location form, it au
 | `/api/checkins` | POST/GET | GPS check-ins |
 | `/api/ocr` | POST | Extract machine_id from sticker image |
 | `/api/geocode?lat=&lng=` | GET | Reverse geocode GPS → address |
+| `/api/geocode-address?address=` | GET | Forward geocode address → GPS |
+| `/api/checkins/heatmap?days=&limit=` | GET | Real check-in GPS coords for heatmap |
 | `/api/export/assets` | GET | CSV export |
 
 ## Environment