feat: Implement dedicated login page and authentication middleware

middleware/auth.ts

@@ -0,0 +1,21 @@
+export default defineNuxtRouteMiddleware(async (to, from) => {
+  const token = useCookie('auth_token')
+
+  if (!token.value && to.path === '/admin') {
+    // Redirect to login page if not authenticated and trying to access admin
+    return navigateTo('/login')
+  }
+
+  if (token.value) {
+    try {
+      // Verify token with server
+      await $fetch('/api/auth/verify')
+    } catch {
+      // If token is invalid, clear it and redirect to login
+      token.value = ''
+      if (to.path === '/admin') {
+        return navigateTo('/login')
+      }
+    }
+  }
+})