feat: Add Time Tracking page with analytics and time distribution charts

- Add TimeTrackingPage with pie/bar charts for time spent per label
- Add task_time_logs schema for tracking time entries
- Add /api/analytics/time-distribution endpoint
- Update sidebar navigation with time tracking link
- Update App routing for new pages
- Fix routine blocker and settings card issues
- Add German translations for analytics

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

client/src/i18n/locales/de.json

@@ -477,6 +477,24 @@
       "admin": "Administrator",
       "user": "Benutzer"
     },
+    "analytics": {
+      "title": "Analysen",
+      "tasksCompleted": "Erledigte Aufgaben",
+      "completionRate": "Abschlussrate",
+      "onTime": "Pünktlich",
+      "late": "Verspätet",
+      "productivityScore": "Produktivitätswert",
+      "timeDistribution": "Zeitverteilung",
+      "timeTracking": "Zeiterfassung",
+      "totalTime": "Gesamtzeit",
+      "noData": "Keine Zeit für diesen Zeitraum erfasst",
+      "period": {
+        "day": "Tag",
+        "week": "Woche",
+        "month": "Monat",
+        "year": "Jahr"
+      }
+    },
     "table": {
       "user": "Benutzer",
       "role": "Rolle",