feat: P2.8 Resources/Equipment Booking (PostgreSQL + VNCdirectory)

- PostgreSQL schema: resources + resources_bookings tables with indexes
- Server-side client with PG pool + in-memory fallback for dev
- API routes: list, get, availability check, book, cancel
- Resource store (Zustand) for client-side state
- ResourcePicker component: type filter, search, availability dots
- Integrated into event-modal: auto-book on save, auto-cancel on delete
- Integrated into free-busy-view: resource availability rows

locales/en/common.json

@@ -3006,6 +3006,19 @@
       "due_today": "Today",
       "due_tomorrow": "Tomorrow",
       "overdue": "Overdue"
+    },
+    "resources": {
+      "title": "Resources",
+      "hide": "Hide resources",
+      "filter_all": "All",
+      "type_room": "Rooms",
+      "type_vehicle": "Vehicles",
+      "type_equipment": "Equipment",
+      "type_other": "Other",
+      "search_placeholder": "Search resources...",
+      "no_resources": "No resources available",
+      "remove": "Remove {name}",
+      "clear_all": "Clear all"
     }
   },
   "sharing": {