fix: move cabinet_branding to sessionStorage and add WebGL availability check

- Branding cache moved from localStorage to sessionStorage so it clears
  when the mini-app is closed, preventing stale names after admin updates
- Added initialDataUpdatedAt: 0 to all branding queries so fresh data is
  always fetched on page refresh while showing cached data instantly
- One-time migration moves existing localStorage value to sessionStorage
- Aurora component now checks WebGL availability upfront, skipping all
  hooks and subscriptions when WebGL is not supported

src/hooks/useBranding.ts

@@ -27,6 +27,7 @@ export function useBranding() {
       return data;
     },
     initialData: getCachedBranding() ?? undefined,
+    initialDataUpdatedAt: 0,
     staleTime: 60000,
     enabled: isAuthenticated,
   });