Refactor: Remove Supabase authentication and related code

- Removed Supabase authentication logic from xem/[slug].vue and yeu-thich.vue.
- Updated favorite and watch later messages to be device-specific.
- Removed unused user state and authentication initialization.
- Deleted supabase.ts plugin file and related configurations.
- Updated nuxt.config.ts to remove Supabase runtime configuration.
- Removed Supabase dependencies from package.json and package-lock.json.
- Adjusted Dockerfile for development environment.
- Added admin layout and pages for managing settings, movies, and users.
- Implemented admin dashboard with statistics and recent activities.
- Created movie and user management interfaces with search functionality.

app/pages/lich-su.vue

@@ -2,7 +2,6 @@
 import { Clock3, Trash2 } from 'lucide-vue-next'
 import type { WatchHistoryItem } from '~/composables/useWatchHistory'
 
-const { initAuth } = useSupabaseAuth()
 const { loadWatchHistory, clearWatchHistory } = useWatchHistory()
 const historyItems = ref<WatchHistoryItem[]>([])
 const loading = ref(true)
@@ -60,7 +59,6 @@ async function removeHistory() {
 }
 
 onMounted(async () => {
-  await initAuth()
   await refreshHistory()
 })