feat: Add photo galleries to services, resource types management, and UI improvements

Major features:
- Add drag-and-drop photo gallery to Service create/edit modals
- Add Resource Types management section to Settings (CRUD for custom types)
- Add edit icon consistency to Resources table (pencil icon in actions)
- Improve Services page with drag-to-reorder and customer preview mockup

Backend changes:
- Add photos JSONField to Service model with migration
- Add ResourceType model with category (STAFF/OTHER), description fields
- Add ResourceTypeViewSet with CRUD operations
- Add service reorder endpoint for display order

Frontend changes:
- Services page: two-column layout, drag-reorder, photo upload
- Settings page: Resource Types tab with full CRUD modal
- Resources page: Edit icon in actions column instead of row click
- Sidebar: Payments link visibility based on role and paymentsEnabled
- Update types.ts with Service.photos and ResourceTypeDefinition

Note: Removed photos from ResourceType (kept only for Service)

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

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

frontend/src/hooks/useResources.ts

@@ -28,6 +28,8 @@ export const useResources = (filters?: ResourceFilters) => {
         name: r.name,
         type: r.type as ResourceType,
         userId: r.user_id ? String(r.user_id) : undefined,
+        maxConcurrentEvents: r.max_concurrent_events ?? 1,
+        savedLaneCount: r.saved_lane_count,
       }));
     },
   });
@@ -47,6 +49,8 @@ export const useResource = (id: string) => {
         name: data.name,
         type: data.type as ResourceType,
         userId: data.user_id ? String(data.user_id) : undefined,
+        maxConcurrentEvents: data.max_concurrent_events ?? 1,
+        savedLaneCount: data.saved_lane_count,
       };
     },
     enabled: !!id,
@@ -91,6 +95,12 @@ export const useUpdateResource = () => {
       if (updates.userId !== undefined) {
         backendData.user = updates.userId ? parseInt(updates.userId) : null;
       }
+      if (updates.maxConcurrentEvents !== undefined) {
+        backendData.max_concurrent_events = updates.maxConcurrentEvents;
+      }
+      if (updates.savedLaneCount !== undefined) {
+        backendData.saved_lane_count = updates.savedLaneCount;
+      }
 
       const { data } = await apiClient.patch(`/api/resources/${id}/`, backendData);
       return data;