Refactor doctor name handling across the application

- Removed the "دکتر" prefix from doctor names in various components and API responses to ensure consistency and clarity.
- Updated the AppointmentDetailPage, CommentsPage, DashboardPage, RatingsPage, SecretariesPage, and other relevant files to reflect the changes in doctor name formatting.
- Adjusted API documentation to align with the new naming conventions.
- Implemented validation to prevent the creation of clinics without a name and restricted users to a single clinic.
- Added tests to verify that doctor names are stored without titles and that clinic creation adheres to the new validation rules.

assets/admin/pages/DashboardPage.tsx

@@ -400,7 +400,7 @@ function AdminDashboard() {
     if (!recent) return [];
     const evs: { title: string; sub: string; time: string; color: string }[] = [];
     (recent.appointments ?? []).slice(0, 4).forEach(a => {
-      evs.push({ title: `نوبت ${APPT_LABEL[a.status] ?? a.status}`, sub: `${a.user_name || a.user_mobile} · دکتر ${a.doctor_name}`, time: a.created_at, color: APPT_COLOR[a.status] ?? '#94a3b8' });
+      evs.push({ title: `نوبت ${APPT_LABEL[a.status] ?? a.status}`, sub: `${a.user_name || a.user_mobile} · ${a.doctor_name}`, time: a.created_at, color: APPT_COLOR[a.status] ?? '#94a3b8' });
     });
     (recent.payments ?? []).slice(0, 3).forEach(p => {
       evs.push({ title: `پرداخت ${PAY_LABEL[p.status] ?? p.status}`, sub: `${p.user_name || p.user_mobile} · ${formatRial(p.amount)}`, time: p.created_at, color: PAY_COLOR[p.status] ?? '#94a3b8' });
@@ -413,7 +413,7 @@ function AdminDashboard() {
 
   const apptRows = useMemo<MiniRow[]>(() =>
     (recent?.appointments ?? []).slice(0, 5).map(a => ({
-      title: a.user_name || a.user_mobile, sub: `دکتر ${a.doctor_name}`, meta: formatDateTime(a.slot_start),
+      title: a.user_name || a.user_mobile, sub: a.doctor_name, meta: formatDateTime(a.slot_start),
       badgeLabel: APPT_LABEL[a.status] ?? a.status, badgeCls: APPT_CLS[a.status] ?? 'gray',
       initials: (a.user_name || a.user_mobile).slice(0, 2), hue: 222,
     })), [recent]);