feat(specialties): show per-city doctor count on /specialties

Fetch active specialties with number_of_doctors from
GET /api/v1/specialties/doctor-counts (scoped to the current city via
matchedCity.id) instead of the static specialties.json, so each specialty
card shows the real doctor count.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/specialties/page.js

@@ -17,10 +17,11 @@ export async function generateMetadata() {
   };
 }
 
-function Specialties() {
+async function Specialties() {
+  const { matchedCity } = await getStateInfo();
   return (
     <Layout name="/specialties">
-      <SpecialtiesPage />
+      <SpecialtiesPage cityId={matchedCity?.id ?? null} />
     </Layout>
   );
 }