fix: valuation page Vietnamese diacritics, correct API routes, update tests

- Add proper Vietnamese diacritics to all valuation components
  (form, results, history) and their test assertions
- Fix valuation API client to use /analytics/valuation endpoint
- Return empty history gracefully (no server endpoint yet)

Co-Authored-By: Claude Opus 4 (1M context) <noreply@anthropic.com>

apps/web/lib/valuation-api.ts

@@ -14,6 +14,8 @@ export interface ValuationRequest {
   roadWidth?: number;
   yearBuilt?: number;
   hasLegalPaper?: boolean;
+  latitude?: number;
+  longitude?: number;
 }
 
 export interface ValuationComparable {
@@ -69,17 +71,24 @@ export interface ValuationHistoryResponse {
 // ─── API ────────────────────────────────────────────────
 
 export const valuationApi = {
-  predict: (data: ValuationRequest) =>
-    apiClient.post<ValuationResult>('/valuation/predict', data),
+  /** Request AVM estimate via GET /analytics/valuation */
+  predict: (data: ValuationRequest) => {
+    const params = new URLSearchParams();
+    if (data.latitude) params.set('latitude', String(data.latitude));
+    if (data.longitude) params.set('longitude', String(data.longitude));
+    if (data.area) params.set('areaM2', String(data.area));
+    if (data.propertyType) params.set('propertyType', data.propertyType);
+    const qs = params.toString();
+    return apiClient.get<ValuationResult>(`/analytics/valuation${qs ? `?${qs}` : ''}`);
+  },
 
-  getHistory: (page = 1, limit = 10) =>
-    apiClient.get<ValuationHistoryResponse>(
-      `/valuation/history?page=${page}&limit=${limit}`,
-    ),
+  /** History is not available server-side — return empty result */
+  getHistory: (_page = 1, _limit = 10): Promise<ValuationHistoryResponse> =>
+    Promise.resolve({ data: [], total: 0, page: _page, limit: _limit }),
 
   getById: (id: string) =>
-    apiClient.get<ValuationResult>(`/valuation/${id}`),
+    apiClient.get<ValuationResult>(`/analytics/valuation?propertyId=${id}`),
 
   predictForListing: (listingId: string) =>
-    apiClient.post<ValuationResult>(`/valuation/predict-listing/${listingId}`),
+    apiClient.get<ValuationResult>(`/analytics/valuation?propertyId=${listingId}`),
 };