Health endpoint, file types config, budget rename, UI fixes

- Add /api/health endpoint (returns 200 OK without auth)
- Update docker-compose healthcheck to use /api/health
- Admin: configurable allowed file types
- Budget categories can now be renamed (inline edit)
- Place inspector: opening hours + files side by side on desktop
- Address clamped to 2 lines, coordinates hidden on mobile
- Category icon-only on mobile, rating hidden on mobile
- Time validation: "10" becomes "10:00"
- Hotel picker: separate save button, edit opens full popup
- Day header background improved for dark mode
- Notes: 150 char limit with counter, textarea input
- Files grid: full width when no opening hours
- Various responsive fixes

client/src/pages/TripPlannerPage.jsx

@@ -16,6 +16,7 @@ import ReservationsPanel from '../components/Planner/ReservationsPanel'
 import PackingListPanel from '../components/Packing/PackingListPanel'
 import FileManager from '../components/Files/FileManager'
 import BudgetPanel from '../components/Budget/BudgetPanel'
+import CollabPanel from '../components/Collab/CollabPanel'
 import Navbar from '../components/Layout/Navbar'
 import { useToast } from '../components/shared/Toast'
 import { Map, X, PanelLeftClose, PanelLeftOpen, PanelRightClose, PanelRightOpen } from 'lucide-react'
@@ -48,7 +49,7 @@ export default function TripPlannerPage() {
     addonsApi.enabled().then(data => {
       const map = {}
       data.addons.forEach(a => { map[a.id] = true })
-      setEnabledAddons({ packing: !!map.packing, budget: !!map.budget, documents: !!map.documents })
+      setEnabledAddons({ packing: !!map.packing, budget: !!map.budget, documents: !!map.documents, collab: !!map.collab })
     }).catch(() => {})
     authApi.getAppConfig().then(config => {
       if (config.allowed_file_types) setAllowedFileTypes(config.allowed_file_types)
@@ -61,6 +62,7 @@ export default function TripPlannerPage() {
     ...(enabledAddons.packing ? [{ id: 'packliste', label: t('trip.tabs.packing'), shortLabel: t('trip.tabs.packingShort') }] : []),
     ...(enabledAddons.budget ? [{ id: 'finanzplan', label: t('trip.tabs.budget') }] : []),
     ...(enabledAddons.documents ? [{ id: 'dateien', label: t('trip.tabs.files') }] : []),
+    ...(enabledAddons.collab ? [{ id: 'collab', label: 'Collab' }] : []),
   ]
 
   const [activeTab, setActiveTab] = useState('plan')
@@ -673,6 +675,12 @@ export default function TripPlannerPage() {
             />
           </div>
         )}
+
+        {activeTab === 'collab' && (
+          <div style={{ height: '100%', overflow: 'hidden', overscrollBehavior: 'contain' }}>
+            <CollabPanel tripId={tripId} />
+          </div>
+        )}
       </div>
 
       <PlaceFormModal isOpen={showPlaceForm} onClose={() => { setShowPlaceForm(false); setEditingPlace(null) }} onSave={handleSavePlace} place={editingPlace} tripId={tripId} categories={categories} onCategoryCreated={cat => tripStore.addCategory?.(cat)} />