feat: enhance staff management and payment gateway features

- Fix national code handling in staff creation and updates to support Persian digits.
- Update ClinicStaff entity to allow longer national codes (up to 15 characters).
- Implement support for clinic secretaries in SecretaryController, allowing creation without a doctor UUID.
- Add a new endpoint to retrieve doctors associated with a clinic for secretary management.
- Improve appointment management by ensuring doctors are selectable even when no appointments exist.
- Extend PatientController to allow secretaries to create patient records if they have the appropriate permissions.
- Introduce a PriceInput component for better price formatting in forms, supporting Persian digits.
- Add a MockGateway for testing payment processes without real transactions.
- Enhance SMS settings management with an approval flow for post-visit text messages, including new fields for pending text and status.
- Update migrations to reflect changes in database schema for national codes and SMS settings.

assets/admin/pages/AppointmentsPage.tsx

@@ -551,14 +551,27 @@ export default function AppointmentsPage() {
   });
   const appointments: Appointment[] = apptQuery.data?.data ?? EMPTY_ARR;
 
-  // ── Unique doctors from results (for clinic tabs)
+  // ── Clinic: load doctors from clinic profile (not derived from appointments)
+  const clinicDoctorsQuery = useQuery<ApiResponse<{ data: { uuid: string; name: string }[] }>>({
+    queryKey: ['clinic-doctors', dbUuid],
+    queryFn: () => api.get(`/api/v1/clinic/doctor-list/${dbUuid}`),
+    enabled: isClinic && !!dbUuid,
+  });
+  const clinicDoctorsList = clinicDoctorsQuery.data?.data?.data ?? [];
+
+  // ── Unique doctors from results (for clinic tabs) + merge with clinic list
   const doctors = React.useMemo(() => {
     const map = new Map<string, string>();
+    // first from clinic API (authoritative list)
+    clinicDoctorsList.forEach(d => map.set(d.uuid, d.name));
+    // then supplement with appointment data (for admin view)
     appointments.forEach(a => {
-      if (a.doctor_uuid && a.doctor_name) map.set(a.doctor_uuid, a.doctor_name);
+      if (a.doctor_uuid && a.doctor_name && !map.has(a.doctor_uuid)) {
+        map.set(a.doctor_uuid, a.doctor_name);
+      }
     });
     return Array.from(map.entries()).map(([uuid, name]) => ({ uuid, name }));
-  }, [appointments]);
+  }, [appointments, clinicDoctorsList]);
 
   const showDoctorTabs = isClinic && doctors.length >= 2;
   const showDoctorCol = isAdmin || (isClinic && !selectedDoctorUuid);