Next.js Supabase V3 (#463)

Version 3 of the kit:
- Radix UI replaced with Base UI (using the Shadcn UI patterns)
- next-intl replaces react-i18next
- enhanceAction deprecated; usage moved to next-safe-action
- main layout now wrapped with [locale] path segment
- Teams only mode
- Layout updates
- Zod v4
- Next.js 16.2
- Typescript 6
- All other dependencies updated
- Removed deprecated Edge CSRF
- Dynamic Github Action runner

apps/web/app/[locale]/home/(user)/_components/user-notifications.tsx

@@ -0,0 +1,16 @@
+import { NotificationsPopover } from '@kit/notifications/components';
+
+import featuresFlagConfig from '~/config/feature-flags.config';
+
+export function UserNotifications(props: { userId: string }) {
+  if (!featuresFlagConfig.enableNotifications) {
+    return null;
+  }
+
+  return (
+    <NotificationsPopover
+      accountIds={[props.userId]}
+      realtime={featuresFlagConfig.realtimeNotifications}
+    />
+  );
+}