fix(frontend): align API route paths with backend (alerts, price-history)

CEO merge: QA approved (cartsnitch-qa[bot]), CTO approved (cartsnitch-cto[bot]), CI green. Merging per SDLC gatekeeper role.

src/hooks/useApi.ts

@@ -35,7 +35,7 @@ export function useProduct(id: string) {
 export function usePriceHistory(productId: string) {
   return useQuery({
     queryKey: ['priceHistory', productId],
-    queryFn: () => api.get<PriceHistory[]>(`/products/${productId}/price-history`),
+    queryFn: () => api.get<PriceHistory[]>(`/products/${productId}/prices`),
     enabled: !!productId,
   })
 }
@@ -50,6 +50,6 @@ export function useCoupons() {
 export function usePriceAlerts() {
   return useQuery({
     queryKey: ['priceAlerts'],
-    queryFn: () => api.get<PriceAlert[]>('/price-alerts'),
+    queryFn: () => api.get<PriceAlert[]>('/alerts'),
   })
 }

src/lib/api.ts

@@ -15,7 +15,7 @@ const mockRoutes: Record<string, (path: string) => unknown> = {
   '/purchases': () => mockPurchases,
   '/products': () => mockProducts,
   '/coupons': () => mockCoupons,
-  '/price-alerts': () => mockAlerts,
+  '/alerts': () => mockAlerts,
 }
 
 function matchMockRoute<T>(path: string): T | null {
@@ -30,7 +30,7 @@ function matchMockRoute<T>(path: string): T | null {
   }
 
   // /products/:id/price-history
-  const priceHistoryMatch = path.match(/^\/products\/(.+)\/price-history$/)
+  const priceHistoryMatch = path.match(/^\/products\/(.+)\/prices$/)
   if (priceHistoryMatch) {
     return getMockPriceHistory(priceHistoryMatch[1]) as T
   }

src/test/mocks/handlers.ts

@@ -61,5 +61,5 @@ export const handlers = [
   http.get('/api/v1/products', () => HttpResponse.json(mockProducts)),
   http.get('/api/v1/products/prod_1', () => HttpResponse.json(mockProducts[0])),
   http.get('/api/v1/coupons', () => HttpResponse.json(mockCoupons)),
-  http.get('/api/v1/price-alerts', () => HttpResponse.json(mockAlerts)),
+  http.get('/api/v1/alerts', () => HttpResponse.json(mockAlerts)),
 ]