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/app.vue

@@ -1,7 +1,14 @@
+<script setup lang="ts">
+const route = useRoute()
+const isAdmin = computed(() => route.path.startsWith('/admin'))
+</script>
+
 <template>
   <NuxtRouteAnnouncer />
   <NuxtLoadingIndicator color="#facc15" :height="2" />
-  <NuxtPage />
-  <AppFooter />
-  <ScrollToTop />
+  <NuxtLayout>
+    <NuxtPage />
+  </NuxtLayout>
+  <AppFooter v-if="!isAdmin" />
+  <ScrollToTop v-if="!isAdmin" />
 </template>