feat: integrate NextAuth.js for authentication, update database service to use better-sqlite3 adapter, and enhance header component with user session management

src/middleware.ts

@@ -0,0 +1,10 @@
+import NextAuth from 'next-auth';
+import { authConfig } from '@/lib/auth.config';
+
+export default NextAuth(authConfig).auth;
+
+export const config = {
+  // Match all paths except static files and api routes that don't need auth
+  matcher: ['/((?!api/auth|_next/static|_next/image|favicon.ico).*)'],
+};
+