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/lib/chuyen-nhuong-api.ts

@@ -8,6 +8,7 @@ import {
   type LucideIcon,
 } from 'lucide-react';
 import { apiClient } from './api-client';
+import type { AiEstimateResult } from './transfer-wizard-store';
 
 // ─── Types ──────────────────────────────────────────────
 
@@ -185,4 +186,16 @@ export const transferApi = {
 
   getStats: () =>
     apiClient.get<TransferStats>('/transfer/stats'),
+
+  estimate: (payload: { category: TransferCategory; condition: TransferCondition; originalPriceVND: number; purchaseYear: number }[]) =>
+    apiClient.post<AiEstimateResult>(
+      '/transfer/estimate',
+      payload,
+    ),
+
+  create: (payload: Record<string, unknown>) =>
+    apiClient.post<{ listingId: string; status: string }>(
+      '/transfer/listings',
+      payload,
+    ),
 };