feat(agents): add public agent profile page at /agents/[id]

Implements a public-facing agent profile page with:
- Backend: new GET /agents/:agentId/profile public API endpoint with
  agent info, active listings, quality score, and review stats
- Frontend: server-rendered profile page with generateMetadata for SEO,
  JSON-LD structured data (RealEstateAgent schema), breadcrumbs
- Agent profile displays bio, service areas, quality score gauge,
  active listing cards, reviews with star ratings, and contact CTA
- Mobile responsive layout with sticky contact sidebar on desktop
- Vietnamese UI text throughout, consistent with existing patterns

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

apps/web/app/[locale]/auth/callback/__tests__/google-callback.spec.tsx

@@ -40,7 +40,7 @@ describe('GoogleCallbackPage', () => {
       handleOAuthCallback: vi.fn().mockResolvedValue(undefined),
     };
     mockedUseAuthStore.mockImplementation((selector) => {
-      if (typeof selector === 'function') return (selector as (s: typeof mockStore) => unknown)(mockStore);
+      if (typeof selector === 'function') return (selector as unknown as (s: typeof mockStore) => unknown)(mockStore);
       return mockStore as ReturnType<typeof useAuthStore>;
     });
   });

apps/web/app/[locale]/auth/callback/__tests__/zalo-callback.spec.tsx

@@ -40,7 +40,7 @@ describe('ZaloCallbackPage', () => {
       handleOAuthCallback: vi.fn().mockResolvedValue(undefined),
     };
     mockedUseAuthStore.mockImplementation((selector) => {
-      if (typeof selector === 'function') return (selector as (s: typeof mockStore) => unknown)(mockStore);
+      if (typeof selector === 'function') return (selector as unknown as (s: typeof mockStore) => unknown)(mockStore);
       return mockStore as ReturnType<typeof useAuthStore>;
     });
   });