Refactor: Implement DashboardLayout, fix mobile nav, and resolve scroll issues

middleware.ts

@@ -0,0 +1,34 @@
+import { NextResponse } from 'next/server'
+import type { NextRequest } from 'next/server'
+
+export function middleware(request: NextRequest) {
+  const token = request.cookies.get('auth_token')
+  
+  // Public paths that don't require authentication
+  if (
+    request.nextUrl.pathname.startsWith('/_next') ||
+    request.nextUrl.pathname.startsWith('/static') ||
+    request.nextUrl.pathname === '/login' ||
+    request.nextUrl.pathname === '/favicon.ico' ||
+    request.nextUrl.pathname.startsWith('/api/auth')
+  ) {
+    // If user is already logged in and tries to access login, redirect to dashboard
+    if (token && request.nextUrl.pathname === '/login') {
+        return NextResponse.redirect(new URL('/', request.url))
+    }
+    return NextResponse.next()
+  }
+
+  // If no token, redirect to login
+  if (!token) {
+    return NextResponse.redirect(new URL('/login', request.url))
+  }
+
+  return NextResponse.next()
+}
+
+export const config = {
+  matcher: [
+    '/((?!_next/static|_next/image|favicon.ico).*)',
+  ],
+}