fix(admin): drop cached environment data when switching context

A doctor who also owns a clinic runs two environments, and a subscription
belongs to an environment, not to the user. The panel treated it as the
user's: the subscription query was keyed ['subscription-my'] with no
context, and switching environments never touched the react-query cache. So
upgrading the clinic left the personal practice showing the clinic's plan
with its feature-gated menu items unlocked, and vice versa.

The query key now carries the active dbUuid, and the context switch clears
the whole cache — every cached response belongs to the environment it was
fetched in, not just this one.

The API was already correct: DualEnvironmentSubscriptionTest pins that
granting one environment leaves the other on free.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

assets/admin/hooks/useSubscription.ts

@@ -6,10 +6,14 @@ import type { MySubscriptionData } from '../types';
 
 export function useSubscription() {
   const primaryRole = useAuthStore((s) => s.primaryRole);
+  const dbUuid      = useAuthStore((s) => s.dbUuid);
   const enabled = primaryRole === 'doctor' || primaryRole === 'clinic' || primaryRole === 'secretary';
 
+  // کلید شامل محیط فعال است: اشتراک روی محیط می‌نشیند، نه روی کاربر. پزشکی که هم
+  // مطب شخصی دارد و هم کلینیک، با کلیدِ بدون محیط پلنِ محیط قبلی را می‌دید و هر دو
+  // محیط ارتقایافته به‌نظر می‌رسیدند.
   const { data } = useQuery<ApiResponse<MySubscriptionData>>({
-    queryKey: ['subscription-my'],
+    queryKey: ['subscription-my', dbUuid],
     queryFn: () => api.get('/api/v1/subscription/my'),
     enabled,
     staleTime: 2 * 60 * 1000,