update

backend/src/services/vehicle.service.ts

@@ -406,6 +406,43 @@ class VehicleService {
     }
   }
 
+  // =========================================================================
+  // MAINTENANCE WINDOWS (for booking calendar overlay)
+  // =========================================================================
+
+  async getMaintenanceWindows(
+    from: Date,
+    to: Date
+  ): Promise<
+    {
+      id: string;
+      bezeichnung: string;
+      kurzname: string | null;
+      status: string;
+      status_bemerkung: string | null;
+      ausser_dienst_von: string;
+      ausser_dienst_bis: string;
+    }[]
+  > {
+    try {
+      const result = await pool.query(
+        `SELECT id, bezeichnung, kurzname, status, status_bemerkung,
+                ausser_dienst_von, ausser_dienst_bis
+         FROM fahrzeuge
+         WHERE deleted_at IS NULL
+           AND status IN ('ausser_dienst_wartung', 'ausser_dienst_schaden')
+           AND ausser_dienst_von IS NOT NULL
+           AND ausser_dienst_bis IS NOT NULL
+           AND (ausser_dienst_von, ausser_dienst_bis) OVERLAPS ($1, $2)`,
+        [from, to]
+      );
+      return result.rows;
+    } catch (error) {
+      logger.error('VehicleService.getMaintenanceWindows failed', { error });
+      throw new Error('Failed to fetch maintenance windows');
+    }
+  }
+
   // =========================================================================
   // DASHBOARD KPI
   // =========================================================================