feat: Enhance provider components with detailed documentation and comments

- Added comprehensive comments and JSDoc-style documentation to NotificationProvider, ThemeProvider, UserProvider, and WebsiteThemeProvider for better clarity and maintainability.
- Improved type definitions in index.ts for better code understanding and usage.
- Introduced Docker support with Dockerfiles for various services including AI server, signaling server, and browser-use service.
- Created a docker-compose.yml file to orchestrate multiple services including PostgreSQL, AI, scraper, and frontend.
- Added a startup guide (startup.txt) for setting up the CRM environment on Ubuntu with Docker.
- Included a .dockerignore file to exclude unnecessary files from Docker builds.

src/app/api/auth/logout/route.ts

@@ -1,7 +1,15 @@
+// ── Auth: Logout ─────────────────────────────────────────────────────────────
+// POST /api/auth/logout
+// Clears the session cookie by setting Max-Age=0, effectively logging the
+// user out. Stateless — no server-side session invalidation needed.
+
 import { SESSION_COOKIE } from "@/lib/auth"
 
+// ── POST ─────────────────────────────────────────────────────────────────────
+
 export async function POST() {
   try {
+    // Overwrite cookie with an immediate expiry (Max-Age=0)
     return new Response(JSON.stringify({ success: true }), {
       status: 200,
       headers: {