diff --git a/client/src/api/client.ts b/client/src/api/client.ts
index 49894e51..156da726 100644
--- a/client/src/api/client.ts
+++ b/client/src/api/client.ts
@@ -1,5 +1,34 @@
 import axios, { AxiosInstance } from 'axios'
 import { getSocketId } from './websocket'
+import en from '../i18n/translations/en'
+import br from '../i18n/translations/br'
+import de from '../i18n/translations/de'
+import es from '../i18n/translations/es'
+import fr from '../i18n/translations/fr'
+import it from '../i18n/translations/it'
+import nl from '../i18n/translations/nl'
+import pl from '../i18n/translations/pl'
+import cs from '../i18n/translations/cs'
+import hu from '../i18n/translations/hu'
+import ru from '../i18n/translations/ru'
+import zh from '../i18n/translations/zh'
+import zhTw from '../i18n/translations/zhTw'
+import ar from '../i18n/translations/ar'
+
+const rateLimitTranslations: Record<string, Record<string, string | unknown>> = {
+  en, br, de, es, fr, it, nl, pl, cs, hu, ru, zh, 'zh-TW': zhTw, ar,
+}
+
+function translateRateLimit(): string {
+  const fallback = 'Too many attempts. Please try again later.'
+  try {
+    const lang = localStorage.getItem('app_language') || 'en'
+    const table = rateLimitTranslations[lang] || rateLimitTranslations.en
+    return (table['common.tooManyAttempts'] as string) || (rateLimitTranslations.en['common.tooManyAttempts'] as string) || fallback
+  } catch {
+    return fallback
+  }
+}
 
 export const apiClient: AxiosInstance = axios.create({
   baseURL: '/api',
@@ -21,7 +50,7 @@ apiClient.interceptors.request.use(
   (error) => Promise.reject(error)
 )
 
-// Response interceptor - handle 401
+// Response interceptor - handle 401, 403 MFA, 429 rate limit
 apiClient.interceptors.response.use(
   (response) => response,
   (error) => {
@@ -38,6 +67,16 @@ apiClient.interceptors.response.use(
     ) {
       window.location.href = '/settings?mfa=required'
     }
+    if (error.response?.status === 429) {
+      const translated = translateRateLimit()
+      const data = error.response.data as { error?: string } | undefined
+      if (data && typeof data === 'object') {
+        data.error = translated
+      } else {
+        error.response.data = { error: translated }
+      }
+      error.message = translated
+    }
     return Promise.reject(error)
   }
 )
diff --git a/client/src/components/Files/FileManager.tsx b/client/src/components/Files/FileManager.tsx
index 4295c46a..b4b4e200 100644
--- a/client/src/components/Files/FileManager.tsx
+++ b/client/src/components/Files/FileManager.tsx
@@ -778,7 +778,7 @@ export default function FileManager({ files = [], onUpload, onDelete, onUpdate,
               title={previewFile.original_name}
             >
               <p style={{ padding: 24, textAlign: 'center', color: 'var(--text-muted)' }}>
-                <button onClick={async () => { const u = await getAuthUrl(previewFile.url, 'download'); window.open(u, '_blank', 'noopener noreferrer') }} style={{ color: 'var(--text-primary)', textDecoration: 'underline', background: 'none', border: 'none', cursor: 'pointer', font: 'inherit' }}>PDF herunterladen</button>
+                <button onClick={async () => { const u = await getAuthUrl(previewFile.url, 'download'); window.open(u, '_blank', 'noopener noreferrer') }} style={{ color: 'var(--text-primary)', textDecoration: 'underline', background: 'none', border: 'none', cursor: 'pointer', font: 'inherit' }}>{t('files.downloadPdf')}</button>
               </p>
             </object>
           </div>
diff --git a/client/src/components/Photos/PhotoLightbox.tsx b/client/src/components/Photos/PhotoLightbox.tsx
index cbd483b5..ba6a5738 100644
--- a/client/src/components/Photos/PhotoLightbox.tsx
+++ b/client/src/components/Photos/PhotoLightbox.tsx
@@ -149,7 +149,7 @@ export function PhotoLightbox({ photos, initialIndex, onClose, onUpdate, onDelet
                   value={caption}
                   onChange={e => setCaption(e.target.value)}
                   onKeyDown={e => e.key === 'Enter' && handleSaveCaption()}
-                  placeholder="Beschriftung hinzufügen..."
+                  placeholder={t('photos.addCaption')}
                   className="flex-1 bg-white/10 text-white border border-white/20 rounded-lg px-3 py-1.5 text-sm focus:outline-none focus:border-white/40"
                   autoFocus
                 />
@@ -173,7 +173,7 @@ export function PhotoLightbox({ photos, initialIndex, onClose, onUpdate, onDelet
                   className="text-white text-sm flex-1 cursor-pointer hover:text-white/80"
                   onClick={() => setEditCaption(true)}
                 >
-                  {photo.caption || <span className="text-white/40 italic">Beschriftung hinzufügen...</span>}
+                  {photo.caption || <span className="text-white/40 italic">{t('photos.addCaption')}</span>}
                 </p>
                 <button
                   onClick={() => setEditCaption(true)}
diff --git a/client/src/components/Photos/PhotoUpload.tsx b/client/src/components/Photos/PhotoUpload.tsx
index aee2e9fc..ff1ed00e 100644
--- a/client/src/components/Photos/PhotoUpload.tsx
+++ b/client/src/components/Photos/PhotoUpload.tsx
@@ -85,10 +85,10 @@ export function PhotoUpload({ tripId, days, places, onUpload, onClose }: PhotoUp
         <input {...getInputProps()} />
         <Upload className={`w-10 h-10 mx-auto mb-3 ${isDragActive ? 'text-slate-900' : 'text-gray-400'}`} />
         {isDragActive ? (
-          <p className="text-slate-700 font-medium">Fotos hier ablegen...</p>
+          <p className="text-slate-700 font-medium">{t('photos.dropHere')}</p>
         ) : (
           <>
-            <p className="text-gray-600 font-medium">Fotos hier ablegen</p>
+            <p className="text-gray-600 font-medium">{t('photos.dropHereActive')}</p>
             <p className="text-gray-400 text-sm mt-1">{t('photos.clickToSelect')}</p>
             <p className="text-gray-400 text-xs mt-2">JPG, PNG, WebP · max. 10 MB · bis zu 30 Fotos</p>
           </>
@@ -152,12 +152,12 @@ export function PhotoUpload({ tripId, days, places, onUpload, onClose }: PhotoUp
             </select>
           </div>
           <div className="col-span-2">
-            <label className="block text-xs font-medium text-gray-700 mb-1">Beschriftung (für alle)</label>
+            <label className="block text-xs font-medium text-gray-700 mb-1">{t('photos.captionForAll')}</label>
             <input
               type="text"
               value={caption}
               onChange={e => setCaption(e.target.value)}
-              placeholder="Optionale Beschriftung..."
+              placeholder={t('photos.captionPlaceholder')}
               className="w-full border border-gray-200 rounded-lg px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-slate-900"
             />
           </div>
diff --git a/client/src/components/Planner/DayPlanSidebar.tsx b/client/src/components/Planner/DayPlanSidebar.tsx
index 25e4f2e4..ca6abffb 100644
--- a/client/src/components/Planner/DayPlanSidebar.tsx
+++ b/client/src/components/Planner/DayPlanSidebar.tsx
@@ -616,7 +616,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
           await tripActions.reorderAssignments(tripId, capturedDayId, capturedPrevIds)
         })
       }
-    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') }
+    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.unknownError')) }
   }
 
   const handleMergedDrop = async (dayId, fromType, fromId, toType, toId, insertAfter = false) => {
@@ -703,7 +703,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
         tripActions.setAssignments(currentAssignments)
       }
     } catch (err) {
-      toast.error(err instanceof Error ? err.message : 'Unknown error')
+      toast.error(err instanceof Error ? err.message : t('common.unknownError'))
       return
     }
 
@@ -852,9 +852,9 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
             await tripActions.moveAssignment(tripId, Number(assignmentId), dayId, capturedFromDayId, capturedOrderIndex)
           })
         })
-        .catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+        .catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
     } else if (noteId && fromDayId !== dayId) {
-      tripActions.moveDayNote(tripId, fromDayId, dayId, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+      tripActions.moveDayNote(tripId, fromDayId, dayId, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
     }
     setDraggingId(null)
     setDropTargetKey(null)
@@ -959,7 +959,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                   a.download = `${trip?.title || 'trip'}.ics`
                   a.click()
                   URL.revokeObjectURL(url)
-                } catch { toast.error('ICS export failed') }
+                } catch { toast.error(t('planner.icsExportFailed')) }
               }}
               onMouseEnter={() => setIcsHover(true)}
               onMouseLeave={() => setIcsHover(false)}
@@ -1186,11 +1186,11 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                       if (placeId) {
                         onAssignToDay?.(parseInt(placeId), day.id)
                       } else if (assignmentId && fromDayId !== day.id) {
-                        tripActions.moveAssignment(tripId, Number(assignmentId), fromDayId, day.id).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                        tripActions.moveAssignment(tripId, Number(assignmentId), fromDayId, day.id).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                       } else if (assignmentId) {
                         handleMergedDrop(day.id, 'place', Number(assignmentId), 'transport', transportId, isAfter)
                       } else if (noteId && fromDayId !== day.id) {
-                        tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                        tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                       } else if (noteId) {
                         handleMergedDrop(day.id, 'note', Number(noteId), 'transport', transportId, isAfter)
                       }
@@ -1204,11 +1204,11 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                       setDropTargetKey(null); window.__dragData = null; return
                     }
                     if (assignmentId && fromDayId !== day.id) {
-                      tripActions.moveAssignment(tripId, Number(assignmentId), fromDayId, day.id).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                      tripActions.moveAssignment(tripId, Number(assignmentId), fromDayId, day.id).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                       setDraggingId(null); setDropTargetKey(null); dragDataRef.current = null; return
                     }
                     if (noteId && fromDayId !== day.id) {
-                      tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                      tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                       setDraggingId(null); setDropTargetKey(null); dragDataRef.current = null; return
                     }
                     const m = getMergedItems(day.id)
@@ -1304,7 +1304,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                                 setDropTargetKey(null); window.__dragData = null
                               } else if (fromAssignmentId && fromDayId !== day.id) {
                                 const toIdx = getDayAssignments(day.id).findIndex(a => a.id === assignment.id)
-                                tripActions.moveAssignment(tripId, Number(fromAssignmentId), fromDayId, day.id, toIdx).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                                tripActions.moveAssignment(tripId, Number(fromAssignmentId), fromDayId, day.id, toIdx).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                                 setDraggingId(null); setDropTargetKey(null); dragDataRef.current = null
                               } else if (fromAssignmentId) {
                                 handleMergedDrop(day.id, 'place', Number(fromAssignmentId), 'place', assignment.id)
@@ -1312,7 +1312,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                                 const tm = getMergedItems(day.id)
                                 const toIdx = tm.findIndex(i => i.type === 'place' && i.data.id === assignment.id)
                                 const so = toIdx <= 0 ? (tm[0]?.sortKey ?? 0) - 1 : (tm[toIdx - 1].sortKey + tm[toIdx].sortKey) / 2
-                                tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId), so).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                                tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId), so).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                                 setDraggingId(null); setDropTargetKey(null); dragDataRef.current = null
                               } else if (noteId) {
                                 handleMergedDrop(day.id, 'note', Number(noteId), 'place', assignment.id)
@@ -1508,11 +1508,11 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                               if (placeId) {
                                 onAssignToDay?.(parseInt(placeId), day.id)
                               } else if (fromAssignmentId && fromDayId !== day.id) {
-                                tripActions.moveAssignment(tripId, Number(fromAssignmentId), fromDayId, day.id).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                                tripActions.moveAssignment(tripId, Number(fromAssignmentId), fromDayId, day.id).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                               } else if (fromAssignmentId) {
                                 handleMergedDrop(day.id, 'place', Number(fromAssignmentId), 'transport', res.id, insertAfter)
                               } else if (noteId && fromDayId !== day.id) {
-                                tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                                tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                               } else if (noteId) {
                                 handleMergedDrop(day.id, 'note', Number(noteId), 'transport', res.id, insertAfter)
                               }
@@ -1596,7 +1596,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                               const tm = getMergedItems(day.id)
                               const toIdx = tm.findIndex(i => i.type === 'note' && i.data.id === note.id)
                               const so = toIdx <= 0 ? (tm[0]?.sortKey ?? 0) - 1 : (tm[toIdx - 1].sortKey + tm[toIdx].sortKey) / 2
-                              tripActions.moveDayNote(tripId, fromDayId, day.id, Number(fromNoteId), so).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                              tripActions.moveDayNote(tripId, fromDayId, day.id, Number(fromNoteId), so).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                               setDraggingId(null); setDropTargetKey(null)
                             } else if (fromNoteId && fromNoteId !== String(note.id)) {
                               handleMergedDrop(day.id, 'note', Number(fromNoteId), 'note', note.id)
@@ -1604,7 +1604,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                               const tm = getMergedItems(day.id)
                               const noteIdx = tm.findIndex(i => i.type === 'note' && i.data.id === note.id)
                               const toIdx = tm.slice(0, noteIdx).filter(i => i.type === 'place').length
-                              tripActions.moveAssignment(tripId, Number(fromAssignmentId), fromDayId, day.id, toIdx).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                              tripActions.moveAssignment(tripId, Number(fromAssignmentId), fromDayId, day.id, toIdx).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                               setDraggingId(null); setDropTargetKey(null)
                             } else if (fromAssignmentId) {
                               handleMergedDrop(day.id, 'place', Number(fromAssignmentId), 'note', note.id)
@@ -1669,11 +1669,11 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                       }
                       if (!assignmentId && !noteId) { dragDataRef.current = null; window.__dragData = null; return }
                       if (assignmentId && fromDayId !== day.id) {
-                        tripActions.moveAssignment(tripId, Number(assignmentId), fromDayId, day.id).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                        tripActions.moveAssignment(tripId, Number(assignmentId), fromDayId, day.id).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                         setDraggingId(null); setDropTargetKey(null); dragDataRef.current = null; return
                       }
                       if (noteId && fromDayId !== day.id) {
-                        tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : 'Unknown error'))
+                        tripActions.moveDayNote(tripId, fromDayId, day.id, Number(noteId)).catch((err: unknown) => toast.error(err instanceof Error ? err.message : t('common.unknownError')))
                         setDraggingId(null); setDropTargetKey(null); dragDataRef.current = null; return
                       }
                       const m = getMergedItems(day.id)
diff --git a/client/src/components/Settings/AccountTab.tsx b/client/src/components/Settings/AccountTab.tsx
index 1c9abfdc..a051ed74 100644
--- a/client/src/components/Settings/AccountTab.tsx
+++ b/client/src/components/Settings/AccountTab.tsx
@@ -142,7 +142,7 @@ export default function AccountTab(): React.ReactElement {
       await updateProfile({ username, email })
       toast.success(t('settings.toast.profileSaved'))
     } catch (err: unknown) {
-      toast.error(err instanceof Error ? err.message : 'Error')
+      toast.error(err instanceof Error ? err.message : t('common.error'))
     } finally {
       setSaving(false)
     }
diff --git a/client/src/components/Settings/DisplaySettingsTab.tsx b/client/src/components/Settings/DisplaySettingsTab.tsx
index e09b45de..ed066701 100644
--- a/client/src/components/Settings/DisplaySettingsTab.tsx
+++ b/client/src/components/Settings/DisplaySettingsTab.tsx
@@ -34,7 +34,7 @@ export default function DisplaySettingsTab(): React.ReactElement {
                 onClick={async () => {
                   try {
                     await updateSetting('dark_mode', opt.value)
-                  } catch (e: unknown) { toast.error(e instanceof Error ? e.message : 'Error') }
+                  } catch (e: unknown) { toast.error(e instanceof Error ? e.message : t('common.error')) }
                 }}
                 style={{
                   display: 'flex', alignItems: 'center', gap: 6,
@@ -63,7 +63,7 @@ export default function DisplaySettingsTab(): React.ReactElement {
               key={opt.value}
               onClick={async () => {
                 try { await updateSetting('language', opt.value) }
-                catch (e: unknown) { toast.error(e instanceof Error ? e.message : 'Error') }
+                catch (e: unknown) { toast.error(e instanceof Error ? e.message : t('common.error')) }
               }}
               style={{
                 display: 'flex', alignItems: 'center', gap: 8,
@@ -94,7 +94,7 @@ export default function DisplaySettingsTab(): React.ReactElement {
               onClick={async () => {
                 setTempUnit(opt.value)
                 try { await updateSetting('temperature_unit', opt.value) }
-                catch (e: unknown) { toast.error(e instanceof Error ? e.message : 'Error') }
+                catch (e: unknown) { toast.error(e instanceof Error ? e.message : t('common.error')) }
               }}
               style={{
                 display: 'flex', alignItems: 'center', gap: 8,
@@ -124,7 +124,7 @@ export default function DisplaySettingsTab(): React.ReactElement {
               key={opt.value}
               onClick={async () => {
                 try { await updateSetting('time_format', opt.value) }
-                catch (e: unknown) { toast.error(e instanceof Error ? e.message : 'Error') }
+                catch (e: unknown) { toast.error(e instanceof Error ? e.message : t('common.error')) }
               }}
               style={{
                 display: 'flex', alignItems: 'center', gap: 8,
@@ -154,7 +154,7 @@ export default function DisplaySettingsTab(): React.ReactElement {
               key={String(opt.value)}
               onClick={async () => {
                 try { await updateSetting('route_calculation', opt.value) }
-                catch (e: unknown) { toast.error(e instanceof Error ? e.message : 'Error') }
+                catch (e: unknown) { toast.error(e instanceof Error ? e.message : t('common.error')) }
               }}
               style={{
                 display: 'flex', alignItems: 'center', gap: 8,
@@ -184,7 +184,7 @@ export default function DisplaySettingsTab(): React.ReactElement {
               key={String(opt.value)}
               onClick={async () => {
                 try { await updateSetting('blur_booking_codes', opt.value) }
-                catch (e: unknown) { toast.error(e instanceof Error ? e.message : 'Error') }
+                catch (e: unknown) { toast.error(e instanceof Error ? e.message : t('common.error')) }
               }}
               style={{
                 display: 'flex', alignItems: 'center', gap: 8,
diff --git a/client/src/components/Settings/MapSettingsTab.tsx b/client/src/components/Settings/MapSettingsTab.tsx
index 807b5808..2d383d8b 100644
--- a/client/src/components/Settings/MapSettingsTab.tsx
+++ b/client/src/components/Settings/MapSettingsTab.tsx
@@ -74,7 +74,7 @@ export default function MapSettingsTab(): React.ReactElement {
       })
       toast.success(t('settings.toast.mapSaved'))
     } catch (err: unknown) {
-      toast.error(err instanceof Error ? err.message : 'Error')
+      toast.error(err instanceof Error ? err.message : t('common.error'))
     } finally {
       setSaving(false)
     }
diff --git a/client/src/components/Todo/TodoListPanel.tsx b/client/src/components/Todo/TodoListPanel.tsx
index 10c2d392..9f8a396f 100644
--- a/client/src/components/Todo/TodoListPanel.tsx
+++ b/client/src/components/Todo/TodoListPanel.tsx
@@ -105,7 +105,7 @@ export default function TodoListPanel({ tripId, items }: { tripId: number; items
     if (!name || categories.includes(name)) { setAddingCategory(false); setNewCategoryName(''); return }
     addTodoItem(tripId, { name: t('todo.newItem'), category: name } as any)
       .then(() => { setAddingCategory(false); setNewCategoryName(''); setFilter(name) })
-      .catch(err => toast.error(err instanceof Error ? err.message : 'Error'))
+      .catch(err => toast.error(err instanceof Error ? err.message : t('common.error')))
   }
 
   // Get category count (non-done items)
@@ -479,7 +479,7 @@ function DetailPane({ item, tripId, categories, members, onClose }: {
         due_date: dueDate || null, category: category || null,
         assigned_user_id: assignedUserId, priority,
       } as any)
-    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Error') }
+    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.error')) }
     setSaving(false)
   }
 
@@ -487,7 +487,7 @@ function DetailPane({ item, tripId, categories, members, onClose }: {
     try {
       await deleteTodoItem(tripId, item.id)
       onClose()
-    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Error') }
+    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.error')) }
   }
 
   const labelStyle: React.CSSProperties = { fontSize: 12, fontWeight: 500, color: 'var(--text-secondary)', marginBottom: 4, display: 'block' }
@@ -663,7 +663,7 @@ function NewTaskPane({ tripId, categories, members, defaultCategory, onCreated,
         assigned_user_id: assignedUserId,
       } as any)
       if (item?.id) onCreated(item.id)
-    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Error') }
+    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.error')) }
     setSaving(false)
   }
 
diff --git a/client/src/i18n/translations/ar.ts b/client/src/i18n/translations/ar.ts
index 3dfd170c..46b602ff 100644
--- a/client/src/i18n/translations/ar.ts
+++ b/client/src/i18n/translations/ar.ts
@@ -12,6 +12,8 @@ const ar: Record<string, string | { name: string; category: string }[]> = {
   'common.loading': 'جارٍ التحميل...',
   'common.import': 'استيراد',
   'common.error': 'خطأ',
+  'common.unknownError': 'خطأ غير معروف',
+  'common.tooManyAttempts': 'محاولات كثيرة جدًا. يرجى المحاولة لاحقًا.',
   'common.back': 'رجوع',
   'common.all': 'الكل',
   'common.close': 'إغلاق',
@@ -416,6 +418,10 @@ const ar: Record<string, string | { name: string; category: string }[]> = {
   'login.mfaHint': 'افتح Google Authenticator أو Authy أو أي تطبيق TOTP آخر.',
   'login.mfaBack': '← العودة لتسجيل الدخول',
   'login.mfaVerify': 'تحقق',
+  'login.invalidInviteLink': 'رابط الدعوة غير صالح أو منتهي الصلاحية',
+  'login.oidcFailed': 'فشل تسجيل الدخول عبر OIDC',
+  'login.usernameRequired': 'اسم المستخدم مطلوب',
+  'login.passwordMinLength': 'يجب أن تكون كلمة المرور 8 أحرف على الأقل',
 
   // Register
   'register.passwordMismatch': 'كلمتا المرور غير متطابقتين',
@@ -1084,9 +1090,13 @@ const ar: Record<string, string | { name: string; category: string }[]> = {
   'budget.settlement': 'التسوية',
   'budget.settlementInfo': 'انقر على صورة العضو في بند الميزانية لتحديده باللون الأخضر — وهذا يعني أنه دفع. ثم تُظهر التسوية من يدين لمن وبكم.',
   'budget.netBalances': 'الأرصدة الصافية',
+  'budget.linkedToReservation': 'مرتبط بحجز — قم بتحرير الاسم هناك',
 
   // Files
   'files.title': 'الملفات',
+  'files.pageTitle': 'الملفات والمستندات',
+  'files.subtitle': '{count} ملف لـ {trip}',
+  'files.downloadPdf': 'تنزيل PDF',
   'files.count': '{count} ملفات',
   'files.countSingular': 'ملف واحد',
   'files.uploaded': 'تم رفع {count}',
@@ -1333,6 +1343,13 @@ const ar: Record<string, string | { name: string; category: string }[]> = {
   'backup.keep.forever': 'الاحتفاظ للأبد',
 
   // Photos
+  'photos.title': 'صور',
+  'photos.subtitle': '{count} صورة لـ {trip}',
+  'photos.dropHere': 'أسقط الصور هنا...',
+  'photos.dropHereActive': 'أسقط الصور هنا',
+  'photos.captionForAll': 'تعليق (للجميع)',
+  'photos.captionPlaceholder': 'تعليق اختياري...',
+  'photos.addCaption': 'إضافة تعليق...',
   'photos.allDays': 'كل الأيام',
   'photos.noPhotos': 'لا توجد صور بعد',
   'photos.uploadHint': 'ارفع صور رحلتك',
@@ -1366,6 +1383,7 @@ const ar: Record<string, string | { name: string; category: string }[]> = {
   'planner.routeCalculated': 'تم حساب المسار',
   'planner.routeCalcFailed': 'تعذر حساب المسار',
   'planner.routeError': 'خطأ أثناء حساب المسار',
+  'planner.icsExportFailed': 'فشل تصدير ICS',
   'planner.routeOptimized': 'تم تحسين المسار',
   'planner.reservationUpdated': 'تم تحديث الحجز',
   'planner.reservationAdded': 'تمت إضافة الحجز',
diff --git a/client/src/i18n/translations/br.ts b/client/src/i18n/translations/br.ts
index e9675d25..0af83c53 100644
--- a/client/src/i18n/translations/br.ts
+++ b/client/src/i18n/translations/br.ts
@@ -8,6 +8,8 @@ const br: Record<string, string | { name: string; category: string }[]> = {
   'common.loading': 'Carregando...',
   'common.import': 'Importar',
   'common.error': 'Erro',
+  'common.unknownError': 'Erro desconhecido',
+  'common.tooManyAttempts': 'Muitas tentativas. Tente novamente mais tarde.',
   'common.back': 'Voltar',
   'common.all': 'Todos',
   'common.close': 'Fechar',
@@ -411,6 +413,10 @@ const br: Record<string, string | { name: string; category: string }[]> = {
   'login.mfaHint': 'Abra o Google Authenticator, Authy ou outro app TOTP.',
   'login.mfaBack': '← Voltar ao login',
   'login.mfaVerify': 'Verificar',
+  'login.invalidInviteLink': 'Link de convite inválido ou expirado',
+  'login.oidcFailed': 'Falha no login OIDC',
+  'login.usernameRequired': 'Nome de usuário é obrigatório',
+  'login.passwordMinLength': 'A senha deve ter pelo menos 8 caracteres',
 
   // Register
   'register.passwordMismatch': 'As senhas não coincidem',
@@ -1053,9 +1059,13 @@ const br: Record<string, string | { name: string; category: string }[]> = {
   'budget.settlement': 'Acerto',
   'budget.settlementInfo': 'Clique no avatar de um membro em um item do orçamento para marcá-lo em verde — significa que ele pagou. O acerto mostra quem deve quanto a quem.',
   'budget.netBalances': 'Saldos líquidos',
+  'budget.linkedToReservation': 'Vinculado a uma reserva — edite o nome lá',
 
   // Files
   'files.title': 'Arquivos',
+  'files.pageTitle': 'Arquivos e documentos',
+  'files.subtitle': '{count} arquivos para {trip}',
+  'files.downloadPdf': 'Baixar PDF',
   'files.count': '{count} arquivos',
   'files.countSingular': '1 arquivo',
   'files.uploaded': '{count} enviado(s)',
@@ -1124,6 +1134,10 @@ const br: Record<string, string | { name: string; category: string }[]> = {
   'packing.allPacked': 'Tudo na mala!',
   'packing.addPlaceholder': 'Adicionar item...',
   'packing.categoryPlaceholder': 'Categoria...',
+  'packing.assignUser': 'Atribuir usuário',
+  'packing.saveAsTemplate': 'Salvar como modelo',
+  'packing.templateName': 'Nome do modelo',
+  'packing.templateSaved': 'Lista de bagagem salva como modelo',
   'packing.filterAll': 'Todos',
   'packing.filterOpen': 'Abertos',
   'packing.filterDone': 'Prontos',
@@ -1134,7 +1148,6 @@ const br: Record<string, string | { name: string; category: string }[]> = {
   'packing.menuCheckAll': 'Marcar todos',
   'packing.menuUncheckAll': 'Desmarcar todos',
   'packing.menuDeleteCat': 'Excluir categoria',
-  'packing.assignUser': 'Atribuir usuário',
   'packing.noMembers': 'Nenhum membro na viagem',
   'packing.addItem': 'Adicionar item',
   'packing.addItemPlaceholder': 'Nome do item...',
@@ -1302,6 +1315,13 @@ const br: Record<string, string | { name: string; category: string }[]> = {
   'backup.keep.forever': 'Manter para sempre',
 
   // Photos
+  'photos.title': 'Fotos',
+  'photos.subtitle': '{count} fotos para {trip}',
+  'photos.dropHere': 'Arraste fotos aqui...',
+  'photos.dropHereActive': 'Arraste fotos aqui',
+  'photos.captionForAll': 'Legenda (para todos)',
+  'photos.captionPlaceholder': 'Legenda opcional...',
+  'photos.addCaption': 'Adicionar legenda...',
   'photos.allDays': 'Todos os dias',
   'photos.noPhotos': 'Nenhuma foto ainda',
   'photos.uploadHint': 'Envie suas fotos de viagem',
@@ -1335,6 +1355,7 @@ const br: Record<string, string | { name: string; category: string }[]> = {
   'planner.routeCalculated': 'Rota calculada',
   'planner.routeCalcFailed': 'Não foi possível calcular a rota',
   'planner.routeError': 'Erro ao calcular a rota',
+  'planner.icsExportFailed': 'Falha ao exportar ICS',
   'planner.routeOptimized': 'Rota otimizada',
   'planner.reservationUpdated': 'Reserva atualizada',
   'planner.reservationAdded': 'Reserva adicionada',
diff --git a/client/src/i18n/translations/cs.ts b/client/src/i18n/translations/cs.ts
index 2b8dbb78..1a9eeb93 100644
--- a/client/src/i18n/translations/cs.ts
+++ b/client/src/i18n/translations/cs.ts
@@ -8,6 +8,8 @@ const cs: Record<string, string | { name: string; category: string }[]> = {
   'common.loading': 'Načítání...',
   'common.import': 'Importovat',
   'common.error': 'Chyba',
+  'common.unknownError': 'Neznámá chyba',
+  'common.tooManyAttempts': 'Příliš mnoho pokusů. Zkuste to prosím znovu.',
   'common.back': 'Zpět',
   'common.all': 'Vše',
   'common.close': 'Zavřít',
@@ -411,6 +413,10 @@ const cs: Record<string, string | { name: string; category: string }[]> = {
   'login.mfaHint': 'Otevřete Google Authenticator, Authy nebo jinou TOTP aplikaci.',
   'login.mfaBack': '← Zpět k přihlášení',
   'login.mfaVerify': 'Ověřit',
+  'login.invalidInviteLink': 'Neplatný nebo vypršelý odkaz s pozvánkou',
+  'login.oidcFailed': 'Přihlášení přes OIDC se nezdařilo',
+  'login.usernameRequired': 'Uživatelské jméno je povinné',
+  'login.passwordMinLength': 'Heslo musí mít alespoň 8 znaků',
 
   // Registrace (Register)
   'register.passwordMismatch': 'Hesla se neshodují',
@@ -1082,9 +1088,13 @@ const cs: Record<string, string | { name: string; category: string }[]> = {
   'budget.settlement': 'Vyúčtování',
   'budget.settlementInfo': 'Klikněte na avatar člena u rozpočtové položky pro zelené označení – to znamená, že zaplatil. Vyúčtování pak ukazuje, kdo komu a kolik dluží.',
   'budget.netBalances': 'Čisté zůstatky',
+  'budget.linkedToReservation': 'Propojeno s rezervací — upravte název tam',
 
   // Soubory (Files)
   'files.title': 'Soubory',
+  'files.pageTitle': 'Soubory a dokumenty',
+  'files.subtitle': '{count} souborů pro {trip}',
+  'files.downloadPdf': 'Stáhnout PDF',
   'files.count': '{count} souborů',
   'files.countSingular': '1 soubor',
   'files.uploaded': '{count} nahráno',
@@ -1331,6 +1341,13 @@ const cs: Record<string, string | { name: string; category: string }[]> = {
   'backup.keep.forever': 'Uchovávat navždy',
 
   // Fotky
+  'photos.title': 'Fotografie',
+  'photos.subtitle': '{count} fotek pro {trip}',
+  'photos.dropHere': 'Přetáhněte fotografie sem...',
+  'photos.dropHereActive': 'Přetáhněte fotografie sem',
+  'photos.captionForAll': 'Popisek (pro všechny)',
+  'photos.captionPlaceholder': 'Volitelný popisek...',
+  'photos.addCaption': 'Přidat popisek...',
   'photos.allDays': 'Všechny dny',
   'photos.noPhotos': 'Zatím žádné fotky',
   'photos.uploadHint': 'Nahrajte své cestovní fotky',
@@ -1364,6 +1381,7 @@ const cs: Record<string, string | { name: string; category: string }[]> = {
   'planner.routeCalculated': 'Trasa vypočtena',
   'planner.routeCalcFailed': 'Trasu se nepodařilo vypočítat',
   'planner.routeError': 'Chyba při výpočtu trasy',
+  'planner.icsExportFailed': 'Export ICS se nezdařil',
   'planner.routeOptimized': 'Trasa optimalizována',
   'planner.reservationUpdated': 'Rezervace aktualizována',
   'planner.reservationAdded': 'Rezervace přidána',
diff --git a/client/src/i18n/translations/de.ts b/client/src/i18n/translations/de.ts
index 2f93e9e7..a5613363 100644
--- a/client/src/i18n/translations/de.ts
+++ b/client/src/i18n/translations/de.ts
@@ -8,6 +8,8 @@ const de: Record<string, string | { name: string; category: string }[]> = {
   'common.loading': 'Laden...',
   'common.import': 'Importieren',
   'common.error': 'Fehler',
+  'common.unknownError': 'Unbekannter Fehler',
+  'common.tooManyAttempts': 'Zu viele Versuche. Bitte versuchen Sie es später erneut.',
   'common.back': 'Zurück',
   'common.all': 'Alle',
   'common.close': 'Schließen',
@@ -414,6 +416,10 @@ const de: Record<string, string | { name: string; category: string }[]> = {
   'login.mfaHint': 'Google Authenticator, Authy oder eine andere TOTP-App öffnen.',
   'login.mfaBack': '← Zurück zur Anmeldung',
   'login.mfaVerify': 'Bestätigen',
+  'login.invalidInviteLink': 'Ungültiger oder abgelaufener Einladungslink',
+  'login.oidcFailed': 'OIDC-Anmeldung fehlgeschlagen',
+  'login.usernameRequired': 'Benutzername ist erforderlich',
+  'login.passwordMinLength': 'Das Passwort muss mindestens 8 Zeichen lang sein',
 
   // Register
   'register.passwordMismatch': 'Passwörter stimmen nicht überein',
@@ -1087,6 +1093,9 @@ const de: Record<string, string | { name: string; category: string }[]> = {
 
   // Files
   'files.title': 'Dateien',
+  'files.pageTitle': 'Dateien & Dokumente',
+  'files.subtitle': '{count} Dateien für {trip}',
+  'files.downloadPdf': 'PDF herunterladen',
   'files.count': '{count} Dateien',
   'files.countSingular': '1 Datei',
   'files.uploaded': '{count} hochgeladen',
@@ -1333,6 +1342,13 @@ const de: Record<string, string | { name: string; category: string }[]> = {
   'backup.keep.forever': 'Immer behalten',
 
   // Photos
+  'photos.title': 'Fotos',
+  'photos.subtitle': '{count} Fotos für {trip}',
+  'photos.dropHere': 'Fotos hier ablegen...',
+  'photos.dropHereActive': 'Fotos hier ablegen',
+  'photos.captionForAll': 'Beschriftung (für alle)',
+  'photos.captionPlaceholder': 'Optionale Beschriftung...',
+  'photos.addCaption': 'Beschriftung hinzufügen...',
   'photos.allDays': 'Alle Tage',
   'photos.noPhotos': 'Noch keine Fotos',
   'photos.uploadHint': 'Lade deine Reisefotos hoch',
@@ -1366,6 +1382,7 @@ const de: Record<string, string | { name: string; category: string }[]> = {
   'planner.routeCalculated': 'Route berechnet',
   'planner.routeCalcFailed': 'Route konnte nicht berechnet werden',
   'planner.routeError': 'Fehler bei der Routenberechnung',
+  'planner.icsExportFailed': 'ICS-Export fehlgeschlagen',
   'planner.routeOptimized': 'Route optimiert',
   'planner.reservationUpdated': 'Reservierung aktualisiert',
   'planner.reservationAdded': 'Reservierung hinzugefügt',
diff --git a/client/src/i18n/translations/en.ts b/client/src/i18n/translations/en.ts
index da78e7c4..3dd36d25 100644
--- a/client/src/i18n/translations/en.ts
+++ b/client/src/i18n/translations/en.ts
@@ -8,6 +8,8 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'common.loading': 'Loading...',
   'common.import': 'Import',
   'common.error': 'Error',
+  'common.unknownError': 'Unknown error',
+  'common.tooManyAttempts': 'Too many attempts. Please try again later.',
   'common.back': 'Back',
   'common.all': 'All',
   'common.close': 'Close',
@@ -438,6 +440,10 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'login.mfaHint': 'Open Google Authenticator, Authy, or another TOTP app.',
   'login.mfaBack': '← Back to sign in',
   'login.mfaVerify': 'Verify',
+  'login.invalidInviteLink': 'Invalid or expired invite link',
+  'login.oidcFailed': 'OIDC login failed',
+  'login.usernameRequired': 'Username is required',
+  'login.passwordMinLength': 'Password must be at least 8 characters',
 
   // Register
   'register.passwordMismatch': 'Passwords do not match',
@@ -1109,6 +1115,9 @@ const en: Record<string, string | { name: string; category: string }[]> = {
 
   // Files
   'files.title': 'Files',
+  'files.pageTitle': 'Files & Documents',
+  'files.subtitle': '{count} files for {trip}',
+  'files.downloadPdf': 'Download PDF',
   'files.count': '{count} files',
   'files.countSingular': '1 file',
   'files.uploaded': '{count} uploaded',
@@ -1200,7 +1209,6 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'packing.saveAsTemplate': 'Save as template',
   'packing.templateName': 'Template name',
   'packing.templateSaved': 'Packing list saved as template',
-  'packing.assignUser': 'Assign user',
   'packing.bags': 'Bags',
   'packing.noBag': 'Unassigned',
   'packing.totalWeight': 'Total weight',
@@ -1356,6 +1364,13 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'backup.keep.forever': 'Keep forever',
 
   // Photos
+  'photos.title': 'Photos',
+  'photos.subtitle': '{count} photos for {trip}',
+  'photos.dropHere': 'Drop photos here...',
+  'photos.dropHereActive': 'Drop photos here',
+  'photos.captionForAll': 'Caption (for all)',
+  'photos.captionPlaceholder': 'Optional caption...',
+  'photos.addCaption': 'Add caption...',
   'photos.allDays': 'All Days',
   'photos.noPhotos': 'No photos yet',
   'photos.uploadHint': 'Upload your travel photos',
@@ -1389,6 +1404,7 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'planner.routeCalculated': 'Route calculated',
   'planner.routeCalcFailed': 'Route could not be calculated',
   'planner.routeError': 'Error calculating route',
+  'planner.icsExportFailed': 'ICS export failed',
   'planner.routeOptimized': 'Route optimized',
   'planner.reservationUpdated': 'Reservation updated',
   'planner.reservationAdded': 'Reservation added',
diff --git a/client/src/i18n/translations/es.ts b/client/src/i18n/translations/es.ts
index 4200c973..83851cf7 100644
--- a/client/src/i18n/translations/es.ts
+++ b/client/src/i18n/translations/es.ts
@@ -8,6 +8,8 @@ const es: Record<string, string> = {
   'common.loading': 'Cargando...',
   'common.import': 'Importar',
   'common.error': 'Error',
+  'common.unknownError': 'Error desconocido',
+  'common.tooManyAttempts': 'Demasiados intentos. Inténtelo de nuevo más tarde.',
   'common.back': 'Atrás',
   'common.all': 'Todo',
   'common.close': 'Cerrar',
@@ -403,6 +405,10 @@ const es: Record<string, string> = {
   'login.mfaHint': 'Abre Google Authenticator, Authy u otra app TOTP.',
   'login.mfaBack': '← Volver al inicio de sesión',
   'login.mfaVerify': 'Verificar',
+  'login.invalidInviteLink': 'Enlace de invitación inválido o expirado',
+  'login.oidcFailed': 'Error de inicio de sesión OIDC',
+  'login.usernameRequired': 'El nombre de usuario es obligatorio',
+  'login.passwordMinLength': 'La contraseña debe tener al menos 8 caracteres',
   'login.oidc.tokenFailed': 'La autenticación falló.',
   'login.oidc.invalidState': 'Sesión no válida. Inténtalo de nuevo.',
   'login.demoFailed': 'Falló el acceso a la demo',
@@ -1040,9 +1046,13 @@ const es: Record<string, string> = {
   'budget.settlement': 'Liquidación',
   'budget.settlementInfo': 'Haz clic en el avatar de un miembro en una partida del presupuesto para marcarlo en verde — esto significa que ha pagado. La liquidación muestra quién debe cuánto a quién.',
   'budget.netBalances': 'Saldos netos',
+  'budget.linkedToReservation': 'Vinculado a una reserva — edita el nombre allí',
 
   // Files
   'files.title': 'Archivos',
+  'files.pageTitle': 'Archivos y documentos',
+  'files.subtitle': '{count} archivos para {trip}',
+  'files.downloadPdf': 'Descargar PDF',
   'files.count': '{count} archivos',
   'files.countSingular': '1 archivo',
   'files.uploaded': '{count} archivos subidos',
@@ -1111,6 +1121,9 @@ const es: Record<string, string> = {
   'packing.templateName': 'Nombre de la plantilla',
   'packing.templateSaved': 'Lista de equipaje guardada como plantilla',
   'packing.assignUser': 'Asignar usuario',
+  'packing.saveAsTemplate': 'Guardar como plantilla',
+  'packing.templateName': 'Nombre de la plantilla',
+  'packing.templateSaved': 'Lista de equipaje guardada como plantilla',
   'packing.noMembers': 'Sin miembros',
   'packing.bags': 'Equipaje',
   'packing.noBag': 'Sin asignar',
@@ -1267,6 +1280,13 @@ const es: Record<string, string> = {
   'backup.keep.forever': 'Conservar para siempre',
 
   // Photos
+  'photos.title': 'Fotos',
+  'photos.subtitle': '{count} fotos para {trip}',
+  'photos.dropHere': 'Suelta fotos aquí...',
+  'photos.dropHereActive': 'Suelta fotos aquí',
+  'photos.captionForAll': 'Leyenda (para todos)',
+  'photos.captionPlaceholder': 'Leyenda opcional...',
+  'photos.addCaption': 'Añadir leyenda...',
   'photos.allDays': 'Todos los días',
   'photos.noPhotos': 'Aún no hay fotos',
   'photos.uploadHint': 'Sube y organiza las fotos compartidas de este viaje',
@@ -1316,6 +1336,7 @@ const es: Record<string, string> = {
   'planner.routeCalculated': 'Ruta calculada',
   'planner.routeCalcFailed': 'No se pudo calcular la ruta',
   'planner.routeError': 'Error al calcular la ruta',
+  'planner.icsExportFailed': 'Error al exportar ICS',
   'planner.routeOptimized': 'Ruta optimizada',
   'planner.reservationUpdated': 'Reserva actualizada',
   'planner.reservationAdded': 'Reserva añadida',
diff --git a/client/src/i18n/translations/fr.ts b/client/src/i18n/translations/fr.ts
index 001034ef..1b092d98 100644
--- a/client/src/i18n/translations/fr.ts
+++ b/client/src/i18n/translations/fr.ts
@@ -8,6 +8,8 @@ const fr: Record<string, string> = {
   'common.loading': 'Chargement…',
   'common.import': 'Importer',
   'common.error': 'Erreur',
+  'common.unknownError': 'Erreur inconnue',
+  'common.tooManyAttempts': 'Trop de tentatives. Veuillez réessayer plus tard.',
   'common.back': 'Retour',
   'common.all': 'Tout',
   'common.close': 'Fermer',
@@ -404,6 +406,10 @@ const fr: Record<string, string> = {
   'login.mfaHint': 'Ouvrez Google Authenticator, Authy ou une autre application TOTP.',
   'login.mfaBack': '← Retour à la connexion',
   'login.mfaVerify': 'Vérifier',
+  'login.invalidInviteLink': 'Lien d\'invitation invalide ou expiré',
+  'login.oidcFailed': 'Échec de connexion OIDC',
+  'login.usernameRequired': 'Le nom d\'utilisateur est obligatoire',
+  'login.passwordMinLength': 'Le mot de passe doit comporter au moins 8 caractères',
   'login.oidc.tokenFailed': 'L\'authentification a échoué.',
   'login.oidc.invalidState': 'Session invalide. Veuillez réessayer.',
   'login.demoFailed': 'Échec de la connexion démo',
@@ -1080,9 +1086,13 @@ const fr: Record<string, string> = {
   'budget.settlement': 'Règlement',
   'budget.settlementInfo': 'Cliquez sur l\'avatar d\'un membre sur un poste budgétaire pour le marquer en vert — cela signifie qu\'il a payé. Le règlement indique ensuite qui doit combien à qui.',
   'budget.netBalances': 'Soldes nets',
+  'budget.linkedToReservation': 'Lié à une réservation — modifiez le nom là-bas',
 
   // Files
   'files.title': 'Fichiers',
+  'files.pageTitle': 'Fichiers et documents',
+  'files.subtitle': '{count} fichiers pour {trip}',
+  'files.downloadPdf': 'Télécharger le PDF',
   'files.count': '{count} fichiers',
   'files.countSingular': '1 fichier',
   'files.uploaded': '{count} importés',
@@ -1173,6 +1183,9 @@ const fr: Record<string, string> = {
   'packing.templateName': 'Nom du modèle',
   'packing.templateSaved': 'Liste de voyage enregistrée comme modèle',
   'packing.assignUser': 'Assigner un utilisateur',
+  'packing.saveAsTemplate': 'Enregistrer comme modèle',
+  'packing.templateName': 'Nom du modèle',
+  'packing.templateSaved': 'Liste de bagages enregistrée comme modèle',
   'packing.noMembers': 'Aucun membre',
   'packing.bags': 'Bagages',
   'packing.noBag': 'Non assigné',
@@ -1329,6 +1342,13 @@ const fr: Record<string, string> = {
   'backup.keep.forever': 'Conserver indéfiniment',
 
   // Photos
+  'photos.title': 'Photos',
+  'photos.subtitle': '{count} photos pour {trip}',
+  'photos.dropHere': 'Déposez des photos ici...',
+  'photos.dropHereActive': 'Déposez des photos ici',
+  'photos.captionForAll': 'Légende (pour tous)',
+  'photos.captionPlaceholder': 'Légende optionnelle...',
+  'photos.addCaption': 'Ajouter une légende...',
   'photos.allDays': 'Tous les jours',
   'photos.noPhotos': 'Aucune photo',
   'photos.uploadHint': 'Importez vos photos de voyage',
@@ -1362,6 +1382,7 @@ const fr: Record<string, string> = {
   'planner.routeCalculated': 'Itinéraire calculé',
   'planner.routeCalcFailed': 'L\'itinéraire n\'a pas pu être calculé',
   'planner.routeError': 'Erreur lors du calcul de l\'itinéraire',
+  'planner.icsExportFailed': 'Échec de l\'export ICS',
   'planner.routeOptimized': 'Itinéraire optimisé',
   'planner.reservationUpdated': 'Réservation mise à jour',
   'planner.reservationAdded': 'Réservation ajoutée',
diff --git a/client/src/i18n/translations/hu.ts b/client/src/i18n/translations/hu.ts
index bc92c8b7..96c4cb1b 100644
--- a/client/src/i18n/translations/hu.ts
+++ b/client/src/i18n/translations/hu.ts
@@ -8,6 +8,8 @@ const hu: Record<string, string | { name: string; category: string }[]> = {
   'common.loading': 'Betöltés...',
   'common.import': 'Importálás',
   'common.error': 'Hiba',
+  'common.unknownError': 'Ismeretlen hiba',
+  'common.tooManyAttempts': 'Túl sok próbálkozás. Kérjük, próbálja újra később.',
   'common.back': 'Vissza',
   'common.all': 'Összes',
   'common.close': 'Bezárás',
@@ -411,6 +413,10 @@ const hu: Record<string, string | { name: string; category: string }[]> = {
   'login.mfaHint': 'Nyisd meg a Google Authenticator, Authy vagy más TOTP alkalmazást.',
   'login.mfaBack': '← Vissza a bejelentkezéshez',
   'login.mfaVerify': 'Ellenőrzés',
+  'login.invalidInviteLink': 'Érvénytelen vagy lejárt meghívólink',
+  'login.oidcFailed': 'OIDC bejelentkezés sikertelen',
+  'login.usernameRequired': 'A felhasználónév kötelező',
+  'login.passwordMinLength': 'A jelszónak legalább 8 karakter hosszúnak kell lennie',
 
   // Regisztráció
   'register.passwordMismatch': 'A jelszavak nem egyeznek',
@@ -1081,9 +1087,13 @@ const hu: Record<string, string | { name: string; category: string }[]> = {
   'budget.settlement': 'Elszámolás',
   'budget.settlementInfo': 'Kattints egy tag avatárjára egy költségvetési tételen a zöld jelöléshez — ez azt jelenti, hogy fizetett. Az elszámolás ezután mutatja, ki kinek mennyivel tartozik.',
   'budget.netBalances': 'Nettó egyenlegek',
+  'budget.linkedToReservation': 'Foglaláshoz kapcsolva — ott módosítsa a nevet',
 
   // Fájlok
   'files.title': 'Fájlok',
+  'files.pageTitle': 'Fájlok és dokumentumok',
+  'files.subtitle': '{count} fájl a következőhöz: {trip}',
+  'files.downloadPdf': 'PDF letöltése',
   'files.count': '{count} fájl',
   'files.countSingular': '1 fájl',
   'files.uploaded': '{count} feltöltve',
@@ -1330,6 +1340,13 @@ const hu: Record<string, string | { name: string; category: string }[]> = {
   'backup.keep.forever': 'Örökre megőrzés',
 
   // Fotók
+  'photos.title': 'Fotók',
+  'photos.subtitle': '{count} fotó a következőhöz: {trip}',
+  'photos.dropHere': 'Húzza ide a fényképeket...',
+  'photos.dropHereActive': 'Húzza ide a fényképeket',
+  'photos.captionForAll': 'Felirat (mindenkinek)',
+  'photos.captionPlaceholder': 'Opcionális felirat...',
+  'photos.addCaption': 'Felirat hozzáadása...',
   'photos.allDays': 'Minden nap',
   'photos.noPhotos': 'Még nincsenek fotók',
   'photos.uploadHint': 'Töltsd fel az úti fotóidat',
@@ -1363,6 +1380,7 @@ const hu: Record<string, string | { name: string; category: string }[]> = {
   'planner.routeCalculated': 'Útvonal kiszámítva',
   'planner.routeCalcFailed': 'Nem sikerült kiszámítani az útvonalat',
   'planner.routeError': 'Hiba az útvonalszámítás során',
+  'planner.icsExportFailed': 'Az ICS-exportálás sikertelen',
   'planner.routeOptimized': 'Útvonal optimalizálva',
   'planner.reservationUpdated': 'Foglalás frissítve',
   'planner.reservationAdded': 'Foglalás hozzáadva',
diff --git a/client/src/i18n/translations/it.ts b/client/src/i18n/translations/it.ts
index 756a8a57..50dea3c8 100644
--- a/client/src/i18n/translations/it.ts
+++ b/client/src/i18n/translations/it.ts
@@ -8,6 +8,8 @@ const it: Record<string, string | { name: string; category: string }[]> = {
   'common.loading': 'Caricamento...',
   'common.import': 'Importa',
   'common.error': 'Errore',
+  'common.unknownError': 'Errore sconosciuto',
+  'common.tooManyAttempts': 'Troppi tentativi. Riprova più tardi.',
   'common.back': 'Indietro',
   'common.all': 'Tutti',
   'common.close': 'Chiudi',
@@ -411,6 +413,10 @@ const it: Record<string, string | { name: string; category: string }[]> = {
   'login.mfaHint': 'Apri Google Authenticator, Authy o un\'altra app TOTP.',
   'login.mfaBack': '← Torna all\'accesso',
   'login.mfaVerify': 'Verifica',
+  'login.invalidInviteLink': 'Link di invito non valido o scaduto',
+  'login.oidcFailed': 'Accesso OIDC non riuscito',
+  'login.usernameRequired': 'Il nome utente è obbligatorio',
+  'login.passwordMinLength': 'La password deve contenere almeno 8 caratteri',
 
   // Register
   'register.passwordMismatch': 'Le password non corrispondono',
@@ -1081,9 +1087,13 @@ const it: Record<string, string | { name: string; category: string }[]> = {
   'budget.settlement': 'Regolamento',
   'budget.settlementInfo': 'Clicca sull\'avatar di un membro su una voce di budget per contrassegnarlo in verde — significa che ha pagato. Il regolamento mostra poi chi deve quanto a chi.',
   'budget.netBalances': 'Saldi netti',
+  'budget.linkedToReservation': 'Collegato a una prenotazione — modifica il nome lì',
 
   // Files
   'files.title': 'File',
+  'files.pageTitle': 'File e documenti',
+  'files.subtitle': '{count} file per {trip}',
+  'files.downloadPdf': 'Scarica PDF',
   'files.count': '{count} file',
   'files.countSingular': '1 documento',
   'files.uploaded': '{count} caricati',
@@ -1330,6 +1340,13 @@ const it: Record<string, string | { name: string; category: string }[]> = {
   'backup.keep.forever': 'Conserva per sempre',
 
   // Photos
+  'photos.title': 'Foto',
+  'photos.subtitle': '{count} foto per {trip}',
+  'photos.dropHere': 'Trascina le foto qui...',
+  'photos.dropHereActive': 'Trascina le foto qui',
+  'photos.captionForAll': 'Didascalia (per tutti)',
+  'photos.captionPlaceholder': 'Didascalia opzionale...',
+  'photos.addCaption': 'Aggiungi didascalia...',
   'photos.allDays': 'Tutti i giorni',
   'photos.noPhotos': 'Ancora nessuna foto',
   'photos.uploadHint': 'Carica le foto del tuo viaggio',
@@ -1363,6 +1380,7 @@ const it: Record<string, string | { name: string; category: string }[]> = {
   'planner.routeCalculated': 'Percorso calcolato',
   'planner.routeCalcFailed': 'Il percorso non è stato calcolato',
   'planner.routeError': 'Errore nel calcolo del percorso',
+  'planner.icsExportFailed': 'Esportazione ICS non riuscita',
   'planner.routeOptimized': 'Percorso ottimizzato',
   'planner.reservationUpdated': 'Prenotazione aggiornata',
   'planner.reservationAdded': 'Prenotazione aggiunta',
diff --git a/client/src/i18n/translations/nl.ts b/client/src/i18n/translations/nl.ts
index 4353ee60..eb79d8bb 100644
--- a/client/src/i18n/translations/nl.ts
+++ b/client/src/i18n/translations/nl.ts
@@ -8,6 +8,8 @@ const nl: Record<string, string> = {
   'common.loading': 'Laden...',
   'common.import': 'Importeren',
   'common.error': 'Fout',
+  'common.unknownError': 'Onbekende fout',
+  'common.tooManyAttempts': 'Te veel pogingen. Probeer het later opnieuw.',
   'common.back': 'Terug',
   'common.all': 'Alles',
   'common.close': 'Sluiten',
@@ -404,6 +406,10 @@ const nl: Record<string, string> = {
   'login.mfaHint': 'Open Google Authenticator, Authy of een andere TOTP-app.',
   'login.mfaBack': '← Terug naar inloggen',
   'login.mfaVerify': 'Verifiëren',
+  'login.invalidInviteLink': 'Ongeldige of verlopen uitnodigingslink',
+  'login.oidcFailed': 'OIDC-aanmelding mislukt',
+  'login.usernameRequired': 'Gebruikersnaam is vereist',
+  'login.passwordMinLength': 'Wachtwoord moet minimaal 8 tekens bevatten',
   'login.oidc.tokenFailed': 'Authenticatie mislukt.',
   'login.oidc.invalidState': 'Ongeldige sessie. Probeer het opnieuw.',
   'login.demoFailed': 'Demo-login mislukt',
@@ -1080,9 +1086,13 @@ const nl: Record<string, string> = {
   'budget.settlement': 'Afrekening',
   'budget.settlementInfo': 'Klik op de avatar van een lid bij een budgetpost om deze groen te markeren — dit betekent dat diegene heeft betaald. De afrekening toont vervolgens wie wie hoeveel verschuldigd is.',
   'budget.netBalances': 'Nettosaldi',
+  'budget.linkedToReservation': 'Gekoppeld aan een reservering — bewerk de naam daar',
 
   // Files
   'files.title': 'Bestanden',
+  'files.pageTitle': 'Bestanden en documenten',
+  'files.subtitle': '{count} bestanden voor {trip}',
+  'files.downloadPdf': 'PDF downloaden',
   'files.count': '{count} bestanden',
   'files.countSingular': '1 bestand',
   'files.uploaded': '{count} geüpload',
@@ -1329,6 +1339,13 @@ const nl: Record<string, string> = {
   'backup.keep.forever': 'Voor altijd bewaren',
 
   // Photos
+  'photos.title': 'Foto\'s',
+  'photos.subtitle': '{count} foto\'s voor {trip}',
+  'photos.dropHere': 'Foto\'s hier neerzetten...',
+  'photos.dropHereActive': 'Foto\'s hier neerzetten',
+  'photos.captionForAll': 'Bijschrift (voor alle)',
+  'photos.captionPlaceholder': 'Optioneel bijschrift...',
+  'photos.addCaption': 'Bijschrift toevoegen...',
   'photos.allDays': 'Alle dagen',
   'photos.noPhotos': 'Nog geen foto\'s',
   'photos.uploadHint': 'Upload je reisfoto\'s',
@@ -1362,6 +1379,7 @@ const nl: Record<string, string> = {
   'planner.routeCalculated': 'Route berekend',
   'planner.routeCalcFailed': 'Route kon niet worden berekend',
   'planner.routeError': 'Fout bij routeberekening',
+  'planner.icsExportFailed': 'ICS-export mislukt',
   'planner.routeOptimized': 'Route geoptimaliseerd',
   'planner.reservationUpdated': 'Reservering bijgewerkt',
   'planner.reservationAdded': 'Reservering toegevoegd',
diff --git a/client/src/i18n/translations/pl.ts b/client/src/i18n/translations/pl.ts
index 5bb8d49a..6132c418 100644
--- a/client/src/i18n/translations/pl.ts
+++ b/client/src/i18n/translations/pl.ts
@@ -7,6 +7,8 @@ const pl: Record<string, string | { name: string; category: string }[]> = {
   'common.add': 'Dodaj',
   'common.loading': 'Ładowanie...',
   'common.error': 'Błąd',
+  'common.unknownError': 'Nieznany błąd',
+  'common.tooManyAttempts': 'Zbyt wiele prób. Spróbuj ponownie później.',
   'common.back': 'Wstecz',
   'common.all': 'Wszystko',
   'common.close': 'Zamknij',
@@ -381,6 +383,10 @@ const pl: Record<string, string | { name: string; category: string }[]> = {
   'login.mfaHint': 'Otwórz Google Authenticator, Authy lub inną aplikację TOTP.',
   'login.mfaBack': '← Powrót do logowania',
   'login.mfaVerify': 'Weryfikuj',
+  'login.invalidInviteLink': 'Nieprawidłowy lub wygasły link zaproszenia',
+  'login.oidcFailed': 'Logowanie OIDC nie powiodło się',
+  'login.usernameRequired': 'Nazwa użytkownika jest wymagana',
+  'login.passwordMinLength': 'Hasło musi mieć co najmniej 8 znaków',
 
   // Register
   'register.passwordMismatch': 'Hasła nie są identyczne',
@@ -1042,6 +1048,9 @@ const pl: Record<string, string | { name: string; category: string }[]> = {
 
   // Files
   'files.title': 'Pliki',
+  'files.pageTitle': 'Pliki i dokumenty',
+  'files.subtitle': '{count} plików dla {trip}',
+  'files.downloadPdf': 'Pobierz PDF',
   'files.count': '{count} plików',
   'files.countSingular': '1 plik',
   'files.uploaded': '{count} przesłanych',
@@ -1121,6 +1130,9 @@ const pl: Record<string, string | { name: string; category: string }[]> = {
   'packing.menuUncheckAll': 'Odznacz wszystko',
   'packing.menuDeleteCat': 'Usuń kategorię',
   'packing.assignUser': 'Przypisz użytkownika',
+  'packing.saveAsTemplate': 'Zapisz jako szablon',
+  'packing.templateName': 'Nazwa szablonu',
+  'packing.templateSaved': 'Lista pakowania zapisana jako szablon',
   'packing.noMembers': 'Brak członków podróży',
   'packing.addItem': 'Dodaj przedmiot',
   'packing.addItemPlaceholder': 'Nazwa przedmiotu...',
@@ -1288,6 +1300,13 @@ const pl: Record<string, string | { name: string; category: string }[]> = {
   'backup.keep.forever': 'Przechowuj na zawsze',
 
   // Photos
+  'photos.title': 'Zdjęcia',
+  'photos.subtitle': '{count} zdjęć dla {trip}',
+  'photos.dropHere': 'Przeciągnij zdjęcia tutaj...',
+  'photos.dropHereActive': 'Przeciągnij zdjęcia tutaj',
+  'photos.captionForAll': 'Podpis (dla wszystkich)',
+  'photos.captionPlaceholder': 'Opcjonalny podpis...',
+  'photos.addCaption': 'Dodaj podpis...',
   'photos.allDays': 'Wszystkie dni',
   'photos.noPhotos': 'Brak zdjęć',
   'photos.uploadHint': 'Prześlij zdjęcia z podróży',
@@ -1321,6 +1340,7 @@ const pl: Record<string, string | { name: string; category: string }[]> = {
   'planner.routeCalculated': 'Trasa została obliczona',
   'planner.routeCalcFailed': 'Nie udało się obliczyć trasy',
   'planner.routeError': 'Błąd obliczania trasy',
+  'planner.icsExportFailed': 'Eksport ICS nie powiódł się',
   'planner.routeOptimized': 'Trasa została zoptymalizowana',
   'planner.reservationUpdated': 'Rezerwacja została zaktualizowana',
   'planner.reservationAdded': 'Rezerwacja została dodana',
@@ -1582,6 +1602,7 @@ const pl: Record<string, string | { name: string; category: string }[]> = {
   'inspector.trackStats': 'Statystyki trasy',
   'budget.exportCsv': 'Eksportuj CSV',
   'budget.table.date': 'Data',
+  'budget.linkedToReservation': 'Powiązane z rezerwacją — edytuj nazwę tam',
   'memories.testFirst': 'Najpierw przetestuj połączenie',
   'memories.linkAlbum': 'Połącz album',
   'memories.selectAlbum': 'Wybierz album Immich',
diff --git a/client/src/i18n/translations/ru.ts b/client/src/i18n/translations/ru.ts
index 56d98696..1052f6ea 100644
--- a/client/src/i18n/translations/ru.ts
+++ b/client/src/i18n/translations/ru.ts
@@ -8,6 +8,8 @@ const ru: Record<string, string> = {
   'common.loading': 'Загрузка...',
   'common.import': 'Импорт',
   'common.error': 'Ошибка',
+  'common.unknownError': 'Неизвестная ошибка',
+  'common.tooManyAttempts': 'Слишком много попыток. Попробуйте позже.',
   'common.back': 'Назад',
   'common.all': 'Все',
   'common.close': 'Закрыть',
@@ -404,6 +406,10 @@ const ru: Record<string, string> = {
   'login.mfaHint': 'Откройте Google Authenticator, Authy или другое TOTP-приложение.',
   'login.mfaBack': '← Назад к входу',
   'login.mfaVerify': 'Подтвердить',
+  'login.invalidInviteLink': 'Недействительная или истёкшая ссылка-приглашение',
+  'login.oidcFailed': 'Ошибка входа через OIDC',
+  'login.usernameRequired': 'Имя пользователя обязательно',
+  'login.passwordMinLength': 'Пароль должен содержать не менее 8 символов',
   'login.oidc.tokenFailed': 'Аутентификация не удалась.',
   'login.oidc.invalidState': 'Недействительная сессия. Попробуйте снова.',
   'login.demoFailed': 'Ошибка демо-входа',
@@ -1080,9 +1086,13 @@ const ru: Record<string, string> = {
   'budget.settlement': 'Взаиморасчёт',
   'budget.settlementInfo': 'Нажмите на аватар участника в строке бюджета, чтобы отметить его зелёным — это значит, что он заплатил. Взаиморасчёт покажет, кто кому и сколько должен.',
   'budget.netBalances': 'Чистые балансы',
+  'budget.linkedToReservation': 'Привязано к бронированию — измените название там',
 
   // Files
   'files.title': 'Файлы',
+  'files.pageTitle': 'Файлы и документы',
+  'files.subtitle': '{count} файлов для {trip}',
+  'files.downloadPdf': 'Скачать PDF',
   'files.count': '{count} файлов',
   'files.countSingular': '1 файл',
   'files.uploaded': '{count} загружено',
@@ -1329,6 +1339,13 @@ const ru: Record<string, string> = {
   'backup.keep.forever': 'Хранить вечно',
 
   // Photos
+  'photos.title': 'Фотографии',
+  'photos.subtitle': '{count} фото для {trip}',
+  'photos.dropHere': 'Перетащите фото сюда...',
+  'photos.dropHereActive': 'Перетащите фото сюда',
+  'photos.captionForAll': 'Подпись (для всех)',
+  'photos.captionPlaceholder': 'Необязательная подпись...',
+  'photos.addCaption': 'Добавить подпись...',
   'photos.allDays': 'Все дни',
   'photos.noPhotos': 'Фото пока нет',
   'photos.uploadHint': 'Загрузите фото из путешествия',
@@ -1362,6 +1379,7 @@ const ru: Record<string, string> = {
   'planner.routeCalculated': 'Маршрут рассчитан',
   'planner.routeCalcFailed': 'Не удалось рассчитать маршрут',
   'planner.routeError': 'Ошибка расчёта маршрута',
+  'planner.icsExportFailed': 'Не удалось экспортировать ICS',
   'planner.routeOptimized': 'Маршрут оптимизирован',
   'planner.reservationUpdated': 'Бронирование обновлено',
   'planner.reservationAdded': 'Бронирование добавлено',
diff --git a/client/src/i18n/translations/zh.ts b/client/src/i18n/translations/zh.ts
index f4ad849f..c4a40fc4 100644
--- a/client/src/i18n/translations/zh.ts
+++ b/client/src/i18n/translations/zh.ts
@@ -8,6 +8,8 @@ const zh: Record<string, string> = {
   'common.loading': '加载中...',
   'common.import': '导入',
   'common.error': '错误',
+  'common.unknownError': '未知错误',
+  'common.tooManyAttempts': '尝试次数过多，请稍后再试。',
   'common.back': '返回',
   'common.all': '全部',
   'common.close': '关闭',
@@ -404,6 +406,10 @@ const zh: Record<string, string> = {
   'login.mfaHint': '打开 Google Authenticator、Authy 或其他 TOTP 应用。',
   'login.mfaBack': '← 返回登录',
   'login.mfaVerify': '验证',
+  'login.invalidInviteLink': '邀请链接无效或已过期',
+  'login.oidcFailed': 'OIDC 登录失败',
+  'login.usernameRequired': '用户名为必填项',
+  'login.passwordMinLength': '密码至少需要8个字符',
   'login.oidc.tokenFailed': '认证失败。',
   'login.oidc.invalidState': '会话无效，请重试。',
   'login.demoFailed': '演示登录失败',
@@ -1080,9 +1086,13 @@ const zh: Record<string, string> = {
   'budget.settlement': '结算',
   'budget.settlementInfo': '点击预算项目上的成员头像将其标记为绿色——表示该成员已付款。结算会显示谁欠谁多少。',
   'budget.netBalances': '净余额',
+  'budget.linkedToReservation': '已链接到预订——在那里编辑名称',
 
   // Files
   'files.title': '文件',
+  'files.pageTitle': '文件与文档',
+  'files.subtitle': '{trip} 的 {count} 个文件',
+  'files.downloadPdf': '下载 PDF',
   'files.count': '{count} 个文件',
   'files.countSingular': '1 个文件',
   'files.uploaded': '已上传 {count} 个',
@@ -1329,6 +1339,13 @@ const zh: Record<string, string> = {
   'backup.keep.forever': '永久保留',
 
   // Photos
+  'photos.title': '照片',
+  'photos.subtitle': '{trip} 的 {count} 张照片',
+  'photos.dropHere': '将照片拖放至此...',
+  'photos.dropHereActive': '将照片拖放至此',
+  'photos.captionForAll': '标题（所有）',
+  'photos.captionPlaceholder': '可选标题...',
+  'photos.addCaption': '添加标题...',
   'photos.allDays': '所有天',
   'photos.noPhotos': '暂无照片',
   'photos.uploadHint': '上传你的旅行照片',
@@ -1362,6 +1379,7 @@ const zh: Record<string, string> = {
   'planner.routeCalculated': '路线已计算',
   'planner.routeCalcFailed': '无法计算路线',
   'planner.routeError': '路线计算错误',
+  'planner.icsExportFailed': 'ICS 导出失败',
   'planner.routeOptimized': '路线已优化',
   'planner.reservationUpdated': '预订已更新',
   'planner.reservationAdded': '预订已添加',
diff --git a/client/src/i18n/translations/zhTw.ts b/client/src/i18n/translations/zhTw.ts
index 9f901897..0cdbf7a6 100644
--- a/client/src/i18n/translations/zhTw.ts
+++ b/client/src/i18n/translations/zhTw.ts
@@ -8,6 +8,8 @@ const zhTw: Record<string, string> = {
   'common.loading': '載入中...',
   'common.import': '匯入',
   'common.error': '錯誤',
+  'common.unknownError': '未知錯誤',
+  'common.tooManyAttempts': '嘗試次數過多，請稍後再試。',
   'common.back': '返回',
   'common.all': '全部',
   'common.close': '關閉',
@@ -125,6 +127,8 @@ const zhTw: Record<string, string> = {
   'dashboard.coverRemoveError': '移除失敗',
   'dashboard.titleRequired': '標題為必填項',
   'dashboard.endDateError': '結束日期必須晚於開始日期',
+  'dashboard.dayCount': '天數',
+  'dashboard.dayCountHint': '未設定旅行日期時的規劃天數。',
 
   // Settings
   'settings.title': '設定',
@@ -428,6 +432,10 @@ const zhTw: Record<string, string> = {
   'login.mfaHint': '開啟 Google Authenticator、Authy 或其他 TOTP 應用。',
   'login.mfaBack': '← 返回登入',
   'login.mfaVerify': '驗證',
+  'login.invalidInviteLink': '邀請連結無效或已過期',
+  'login.oidcFailed': 'OIDC 登入失敗',
+  'login.usernameRequired': '使用者名稱為必填',
+  'login.passwordMinLength': '密碼至少需要8個字元',
   'login.oidc.tokenFailed': '認證失敗。',
   'login.oidc.invalidState': '會話無效，請重試。',
   'login.demoFailed': '演示登入失敗',
@@ -1108,6 +1116,9 @@ const zhTw: Record<string, string> = {
 
   // Files
   'files.title': '檔案',
+  'files.pageTitle': '檔案與文件',
+  'files.subtitle': '{trip} 的 {count} 個檔案',
+  'files.downloadPdf': '下載 PDF',
   'files.count': '{count} 個檔案',
   'files.countSingular': '1 個檔案',
   'files.uploaded': '已上傳 {count} 個',
@@ -1354,6 +1365,13 @@ const zhTw: Record<string, string> = {
   'backup.keep.forever': '永久保留',
 
   // Photos
+  'photos.title': '照片',
+  'photos.subtitle': '{trip} 的 {count} 張照片',
+  'photos.dropHere': '將照片拖放至此...',
+  'photos.dropHereActive': '將照片拖放至此',
+  'photos.captionForAll': '標題（所有）',
+  'photos.captionPlaceholder': '可選標題...',
+  'photos.addCaption': '新增標題...',
   'photos.allDays': '所有天',
   'photos.noPhotos': '暫無照片',
   'photos.uploadHint': '上傳你的旅行照片',
@@ -1387,6 +1405,7 @@ const zhTw: Record<string, string> = {
   'planner.routeCalculated': '路線已計算',
   'planner.routeCalcFailed': '無法計算路線',
   'planner.routeError': '路線計算錯誤',
+  'planner.icsExportFailed': 'ICS 匯出失敗',
   'planner.routeOptimized': '路線已最佳化',
   'planner.reservationUpdated': '預訂已更新',
   'planner.reservationAdded': '預訂已新增',
diff --git a/client/src/pages/FilesPage.tsx b/client/src/pages/FilesPage.tsx
index 8f5152d7..2a6c4eac 100644
--- a/client/src/pages/FilesPage.tsx
+++ b/client/src/pages/FilesPage.tsx
@@ -78,8 +78,8 @@ export default function FilesPage(): React.ReactElement {
 
           <div className="flex items-center justify-between mb-6">
             <div>
-              <h1 className="text-2xl font-bold text-gray-900">Dateien & Dokumente</h1>
-              <p className="text-gray-500 text-sm">{files.length} Dateien für {trip?.name}</p>
+              <h1 className="text-2xl font-bold text-gray-900">{t('files.pageTitle')}</h1>
+              <p className="text-gray-500 text-sm">{t('files.subtitle', { count: files.length, trip: trip?.name })}</p>
             </div>
           </div>
 
diff --git a/client/src/pages/LoginPage.tsx b/client/src/pages/LoginPage.tsx
index 56719fa1..ac5fb4f3 100644
--- a/client/src/pages/LoginPage.tsx
+++ b/client/src/pages/LoginPage.tsx
@@ -65,7 +65,7 @@ export default function LoginPage(): React.ReactElement {
       authApi.validateInvite(invite).then(() => {
         setInviteValid(true)
       }).catch(() => {
-        setError('Invalid or expired invite link')
+        setError(t('login.invalidInviteLink'))
       })
       window.history.replaceState({}, '', window.location.pathname)
     }
@@ -82,12 +82,12 @@ export default function LoginPage(): React.ReactElement {
             await loadUser()
             navigate('/dashboard', { replace: true })
           } else {
-            setError(data.error || 'OIDC login failed')
+            setError(data.error || t('login.oidcFailed'))
           }
         })
         .catch(() => {
           window.history.replaceState({}, '', '/login')
-          setError('OIDC login failed')
+          setError(t('login.oidcFailed'))
         })
         .finally(() => setIsLoading(false))
       return
@@ -172,8 +172,8 @@ export default function LoginPage(): React.ReactElement {
         return
       }
       if (mode === 'register') {
-        if (!username.trim()) { setError('Username is required'); setIsLoading(false); return }
-        if (password.length < 8) { setError('Password must be at least 8 characters'); setIsLoading(false); return }
+        if (!username.trim()) { setError(t('login.usernameRequired')); setIsLoading(false); return }
+        if (password.length < 8) { setError(t('login.passwordMinLength')); setIsLoading(false); return }
         await register(username, email, password, inviteToken || undefined)
       } else {
         const result = await login(email, password)
diff --git a/client/src/pages/PhotosPage.tsx b/client/src/pages/PhotosPage.tsx
index 759b1820..4d99c472 100644
--- a/client/src/pages/PhotosPage.tsx
+++ b/client/src/pages/PhotosPage.tsx
@@ -89,8 +89,8 @@ export default function PhotosPage(): React.ReactElement {
 
           <div className="flex items-center justify-between mb-6">
             <div>
-              <h1 className="text-2xl font-bold text-gray-900">Fotos</h1>
-              <p className="text-gray-500 text-sm">{photos.length} Fotos für {trip?.name}</p>
+              <h1 className="text-2xl font-bold text-gray-900">{t('photos.title')}</h1>
+              <p className="text-gray-500 text-sm">{t('photos.subtitle', { count: photos.length, trip: trip?.name })}</p>
             </div>
           </div>
 
diff --git a/client/src/pages/TripPlannerPage.tsx b/client/src/pages/TripPlannerPage.tsx
index 1002531e..e519243e 100644
--- a/client/src/pages/TripPlannerPage.tsx
+++ b/client/src/pages/TripPlannerPage.tsx
@@ -366,7 +366,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
           }
         })
       }
-    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') }
+    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.unknownError')) }
   }, [deletePlaceId, tripId, toast, selectedPlaceId, pushUndo])
 
   const handleAssignToDay = useCallback(async (placeId, dayId, position) => {
@@ -383,7 +383,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
           await tripActions.removeAssignment(tripId, capturedTarget, capturedAssignmentId)
         })
       }
-    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') }
+    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.unknownError')) }
   }, [selectedDayId, tripId, toast, updateRouteForDay, pushUndo])
 
   const handleRemoveAssignment = useCallback(async (dayId, assignmentId) => {
@@ -401,7 +401,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
         })
       }
     }
-    catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') }
+    catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.unknownError')) }
   }, [tripId, toast, updateRouteForDay, pushUndo])
 
   const handleReorder = useCallback((dayId, orderedIds) => {
@@ -430,7 +430,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
 
   const handleUpdateDayTitle = useCallback(async (dayId, title) => {
     try { await tripActions.updateDayTitle(tripId, dayId, title) }
-    catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') }
+    catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.unknownError')) }
   }, [tripId, toast])
 
   const handleSaveReservation = async (data) => {
@@ -453,7 +453,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
         }
         return r
       }
-    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') }
+    } catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.unknownError')) }
   }
 
   const handleDeleteReservation = async (id) => {
@@ -463,7 +463,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
       // Refresh accommodations in case a hotel booking was deleted
       accommodationsApi.list(tripId).then(d => setTripAccommodations(d.accommodations || [])).catch(() => {})
     }
-    catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') }
+    catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.unknownError')) }
   }
 
   const selectedPlace = selectedPlaceId ? places.find(p => p.id === selectedPlaceId) : null
@@ -818,7 +818,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
                     }))
                   } catch {}
                 }}
-                onUpdatePlace={async (placeId, data) => { try { await tripActions.updatePlace(tripId, placeId, data) } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') } }}
+                onUpdatePlace={async (placeId, data) => { try { await tripActions.updatePlace(tripId, placeId, data) } catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.unknownError')) } }}
                 leftWidth={(isMobile || window.innerWidth < 900) ? 0 : (leftCollapsed ? 0 : leftWidth)}
                 rightWidth={(isMobile || window.innerWidth < 900) ? 0 : (rightCollapsed ? 0 : rightWidth)}
               />
@@ -867,7 +867,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
                         }))
                       } catch {}
                     }}
-                    onUpdatePlace={async (placeId, data) => { try { await tripActions.updatePlace(tripId, placeId, data) } catch (err: unknown) { toast.error(err instanceof Error ? err.message : 'Unknown error') } }}
+                    onUpdatePlace={async (placeId, data) => { try { await tripActions.updatePlace(tripId, placeId, data) } catch (err: unknown) { toast.error(err instanceof Error ? err.message : t('common.unknownError')) } }}
                     leftWidth={0}
                     rightWidth={0}
                   />