feat(maps): add kill switches for Google Places autocomplete and details

Add admin toggles for places_autocomplete_enabled and places_details_enabled
alongside the existing places_photos_enabled, all default ON.

- adminService: getPlacesAutocomplete/updatePlacesAutocomplete, getPlacesDetails/updatePlacesDetails
- admin routes: GET/PUT /admin/places-autocomplete, /admin/places-details
- maps routes: autocomplete returns { suggestions: [], source: 'disabled' } when off;
  details returns { place: null, disabled: true } when off
- authService: both flags included in getAppConfig() response
- authStore: placesAutocompleteEnabled + placesDetailsEnabled state and setters
- App.tsx: wire both flags from app-config on load
- AdminPage: two new toggle rows using var(--text-primary)/var(--border-primary) consistent with rest of UI
- i18n: all 15 locales (en, de, ar, br, cs, es, fr, hu, id, it, nl, pl, ru, zh, zhTw)

server/src/services/authService.ts

@@ -231,6 +231,10 @@ export function getAppConfig(authenticatedUser: { id: number } | null) {
   const tripRemindersEnabled = tripReminderSetting !== 'false';
   const placesPhotosSetting = (db.prepare("SELECT value FROM app_settings WHERE key = 'places_photos_enabled'").get() as { value: string } | undefined)?.value;
   const placesPhotosEnabled = placesPhotosSetting !== 'false';
+  const placesAutocompleteSetting = (db.prepare("SELECT value FROM app_settings WHERE key = 'places_autocomplete_enabled'").get() as { value: string } | undefined)?.value;
+  const placesAutocompleteEnabled = placesAutocompleteSetting !== 'false';
+  const placesDetailsSetting = (db.prepare("SELECT value FROM app_settings WHERE key = 'places_details_enabled'").get() as { value: string } | undefined)?.value;
+  const placesDetailsEnabled = placesDetailsSetting !== 'false';
   const setupComplete = userCount > 0 && !(db.prepare("SELECT id FROM users WHERE role = 'admin' AND must_change_password = 1 LIMIT 1").get());
 
   return {
@@ -261,6 +265,8 @@ export function getAppConfig(authenticatedUser: { id: number } | null) {
     available_channels: { email: hasSmtpHost, webhook: hasWebhookEnabled, inapp: true },
     trip_reminders_enabled: tripRemindersEnabled,
     places_photos_enabled: placesPhotosEnabled,
+    places_autocomplete_enabled: placesAutocompleteEnabled,
+    places_details_enabled: placesDetailsEnabled,
     permissions: authenticatedUser ? getAllPermissions() : undefined,
     dev_mode: process.env.NODE_ENV === 'development',
   };