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.

Dockerfile.dev

@@ -0,0 +1,7 @@
+FROM node:22-alpine
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+COPY . .
+EXPOSE 3002
+CMD ["npm", "run", "dev"]