feat: add dashboard page with stats, quick actions, recent vehicles, update navigation and login redirect

frontend/messages/de.json

@@ -19,6 +19,24 @@
   "nav.retouch": "Bildretusche",
   "nav.menu": "Menü",
   "nav.appName": "ERP Nutzfahrzeuge",
+  "dashboard.title": "Dashboard",
+  "dashboard.totalVehicles": "Fahrzeuge gesamt",
+  "dashboard.available": "Verfügbar",
+  "dashboard.reserved": "Reserviert",
+  "dashboard.sold": "Verkauft",
+  "dashboard.totalValue": "Gesamtwert",
+  "dashboard.quickActions": "Schnellaktionen",
+  "dashboard.newVehicle": "Neues Fahrzeug",
+  "dashboard.newContact": "Neuer Kontakt",
+  "dashboard.newSale": "Neuer Verkauf",
+  "dashboard.recentVehicles": "Letzte Fahrzeuge",
+  "dashboard.noVehicles": "Keine Fahrzeuge vorhanden",
+  "dashboard.error": "Fehler beim Laden der Daten",
+  "dashboard.make": "Marke",
+  "dashboard.model": "Modell",
+  "dashboard.fin": "FIN",
+  "dashboard.price": "Preis",
+  "dashboard.availability": "Verfügbarkeit",
   "common.save": "Speichern",
   "common.cancel": "Abbrechen",
   "common.delete": "Löschen",