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>

services/response.js

@@ -51,6 +51,11 @@ export const request = {
         Authorization: "",
       },
     }),
+  getSpecialtyDoctorCounts: (cityId) =>
+    api.get("api/v1/specialties/doctor-counts", {
+      params: cityId ? { city_id: cityId } : {},
+      headers: { Authorization: "" },
+    }),
   getAppointmentWeeklySchedule: (uuid) =>
     api.get(`api/v1/appointment-settings/weekly-schedule/${uuid}`),
   postAppointmentWeeklySchedule: () =>