fix: show maintenance records on vehicle summary screen (refs #239)

The Vehicle Records section on /garage/vehicles/:id never called
useMaintenanceRecords, so maintenance rows always rendered empty even
when records existed for the vehicle. Wire the existing hook into both
the desktop VehicleDetailPage and mobile VehicleDetailMobile, merge
records into the unified list with category + subtypes + shop name,
and include the maintenance loading state in the section's loading
and empty-state guards.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/features/vehicles/mobile/VehicleDetailMobile.tsx

@@ -12,6 +12,9 @@ import { FuelLogResponse, UpdateFuelLogRequest } from '../../fuel-logs/types/fue
 import { FuelLogEditDialog } from '../../fuel-logs/components/FuelLogEditDialog';
 import { fuelLogsApi } from '../../fuel-logs/api/fuel-logs.api';
 import { MaintenanceRecordForm } from '../../maintenance/components/MaintenanceRecordForm';
+import { useMaintenanceRecords } from '../../maintenance/hooks/useMaintenanceRecords';
+import { getCategoryDisplayName } from '../../maintenance/types/maintenance.types';
+import type { MaintenanceRecordResponse } from '../../maintenance/types/maintenance.types';
 import { VehicleImage } from '../components/VehicleImage';
 import { OwnershipCostsList } from '../../ownership-costs';
 import { getVehicleLabel } from '@/core/utils/vehicleDisplay';
@@ -46,6 +49,7 @@ export const VehicleDetailMobile: React.FC<VehicleDetailMobileProps> = ({
 
   const [recordFilter, setRecordFilter] = useState<'All' | 'Fuel Logs' | 'Maintenance' | 'Documents'>('All');
   const { fuelLogs, isLoading: isFuelLoading } = useFuelLogs(vehicle.id);
+  const { records: maintenanceRecords, isRecordsLoading: isMaintenanceLoading } = useMaintenanceRecords(vehicle.id);
   const queryClient = useQueryClient();
   const [editingLog, setEditingLog] = useState<FuelLogResponse | null>(null);
   const [showMaintenanceDialog, setShowMaintenanceDialog] = useState(false);
@@ -124,8 +128,34 @@ export const VehicleDetailMobile: React.FC<VehicleDetailMobileProps> = ({
         });
       }
     }
+
+    if (maintenanceRecords && Array.isArray(maintenanceRecords)) {
+      for (const rec of maintenanceRecords as MaintenanceRecordResponse[]) {
+        const catLabel = getCategoryDisplayName(rec.category);
+        const subtypes = Array.isArray(rec.subtypes) ? rec.subtypes : [];
+        const subtypeText = subtypes.length
+          ? `${subtypes.slice(0, 3).join(', ')}${subtypes.length > 3 ? ` +${subtypes.length - 3}` : ''}`
+          : '';
+        const summary = subtypeText ? `${catLabel} — ${subtypeText}` : catLabel;
+        const secondaryParts: string[] = [];
+        if (rec.shopName) secondaryParts.push(rec.shopName);
+        secondaryParts.push(new Date(rec.date).toLocaleDateString());
+        secondaryParts.push('Maintenance');
+        const secondary = secondaryParts.join(' • ');
+        const amount = typeof rec.cost === 'number' ? `$${rec.cost.toFixed(2)}` : undefined;
+        list.push({
+          id: rec.id,
+          type: 'Maintenance',
+          date: rec.date,
+          summary,
+          amount,
+          secondary
+        });
+      }
+    }
+
     return list.sort((a, b) => b.date.localeCompare(a.date));
-  }, [fuelLogs]);
+  }, [fuelLogs, maintenanceRecords]);
 
   const filteredRecords = useMemo(() => {
     if (recordFilter === 'All') return records;
@@ -243,7 +273,7 @@ export const VehicleDetailMobile: React.FC<VehicleDetailMobileProps> = ({
       <Section title="Vehicle Records">
         <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', mb: 1 }}>
           <Typography variant="body2" color="text.secondary">
-            {isFuelLoading ? 'Loading…' : `${filteredRecords.length} record${filteredRecords.length === 1 ? '' : 's'}`}
+            {(isFuelLoading || isMaintenanceLoading) ? 'Loading…' : `${filteredRecords.length} record${filteredRecords.length === 1 ? '' : 's'}`}
           </Typography>
           <FormControl size="small" sx={{ minWidth: 180 }}>
             <InputLabel id="vehicle-records-filter">Filter</InputLabel>
@@ -262,7 +292,7 @@ export const VehicleDetailMobile: React.FC<VehicleDetailMobileProps> = ({
         </Box>
         <Card>
           <CardContent sx={{ p: 0 }}>
-            {isFuelLoading ? (
+            {(isFuelLoading || isMaintenanceLoading) ? (
               <Box sx={{ p: 2 }}>
                 <Typography color="text.secondary" variant="body2">Loading records…</Typography>
               </Box>