fix: complete restore page translations and fix structure

- Fix restoreTypes translation structure (was under options.types)
- Add missing restore.messages.restoreStarted translation
- Ensure all restore wizard strings use translations
- Add corresponding German translations for restore section
- Fix translation key structure to match component expectations

🤖 Generated with Claude Code

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

frontend/src/i18n/locales/de.json

@@ -1198,10 +1198,7 @@
         "enterPassphrase": "Verschlüsselungs-Passphrase eingeben",
         "at": "um"
       },
-      "options": {
-        "title": "Wiederherstellungsoptionen",
-        "subtitle": "Wählen Sie, was wiederhergestellt werden soll",
-        "types": {
+      "restoreTypes": {
           "full": {
             "name": "Vollständige Wiederherstellung",
             "description": "Alles wiederherstellen, einschließlich Datenbank, Fotos und Archive",
@@ -1222,7 +1219,10 @@
             "description": "Bestimmte Elemente zur Wiederherstellung auswählen",
             "warning": "Nur ausgewählte Elemente werden wiederhergestellt"
           }
-        },
+      },
+      "options": {
+        "title": "Wiederherstellungsoptionen",
+        "subtitle": "Wählen Sie, was wiederhergestellt werden soll",
         "additionalOptions": {
           "title": "Zusätzliche Optionen",
           "skipPreBackup": "Vor-Wiederherstellungs-Backup überspringen",
@@ -1285,6 +1285,9 @@
         "starting": "Starte...",
         "validating": "Validiere...",
         "startNewRestore": "Neue Wiederherstellung starten"
+      },
+      "messages": {
+        "restoreStarted": "Wiederherstellung erfolgreich gestartet"
       }
     },
     "messages": {

frontend/src/i18n/locales/en.json

@@ -1254,10 +1254,7 @@
         "enterPassphrase": "Enter encryption passphrase",
         "at": "at"
       },
-      "options": {
-        "title": "Restore Options",
-        "subtitle": "Choose what to restore",
-        "types": {
+      "restoreTypes": {
           "full": {
             "name": "Full Restore",
             "description": "Restore everything including database, photos, and archives",
@@ -1278,7 +1275,10 @@
             "description": "Choose specific items to restore",
             "warning": "Only selected items will be restored"
           }
-        },
+      },
+      "options": {
+        "title": "Restore Options",
+        "subtitle": "Choose what to restore",
         "additionalOptions": {
           "title": "Additional Options",
           "skipPreBackup": "Skip Pre-Restore Backup",
@@ -1341,6 +1341,9 @@
         "starting": "Starting...",
         "validating": "Validating...",
         "startNewRestore": "Start New Restore"
+      },
+      "messages": {
+        "restoreStarted": "Restore started successfully"
       }
     },
     "messages": {