feat(clinic-services): two-page section→services flow matching Figma

Restructure clinic-services from two-pane to Figma two-view flow:
sections card grid (name, edit, activate/deactivate, 'بخش جدید' modal) →
click a section → its services card grid with breadcrumb back. Service
card matches Figma: overflow menu, active badge, base price, average
time badge, staff chip. Add duration_minutes to ServiceItem (migration
+ create/update + form field). Update clinic-services.md.

(Version20260713050014 syncs pre-existing entity/schema drift.)

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

assets/admin/types/index.ts

@@ -431,6 +431,7 @@ export interface ServiceItem {
     active: boolean;
     insurance_covered?: boolean;
     insurance_price_rials?: number | null;
+    duration_minutes?: number | null;
 }
 
 export interface SmsWalletBalance {