fix(web): resolve all 22 TypeScript typecheck errors in apps/web (TEC-3208)

- Fix TS4111: use bracket notation for index signature access in metadata.spec.ts,
  neighborhood-poi-map.tsx, and neighborhood-poi-map.spec.tsx
- Fix TS2740: add missing property fields (usableAreaM2, floor, totalFloors,
  nearbyPOIs, etc.) to test mock objects in 5 spec files
- Fix TS2339: add missing estimate() and create() methods to transferApi
- Fix TS4114: add override modifier to render() in page.tsx error boundary
- Fix TS2532: add optional chaining for possibly undefined features in
  neighborhood-poi-map.tsx

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/components/comparison/__tests__/comparison-table.spec.tsx

@@ -102,6 +102,20 @@ function makeListing(id: string, overrides: Partial<ListingDetail> = {}): Listin
       latitude: null,
       longitude: null,
       media: [{ id: 'm1', type: 'image', url: 'https://example.com/img.jpg', order: 0, caption: null }],
+      usableAreaM2: null,
+      floor: null,
+      totalFloors: null,
+      nearbyPOIs: null,
+      metroDistanceM: null,
+      furnishing: null,
+      propertyCondition: null,
+      balconyDirection: null,
+      maintenanceFeeVND: null,
+      parkingSlots: null,
+      viewType: [],
+      petFriendly: null,
+      suitableFor: [],
+      whyThisLocation: null,
     },
     seller: { id: 's1', fullName: 'Seller', phone: '0901234567' },
     agent: null,