diff --git a/admin/templates/posts.html b/admin/templates/posts.html
index 7201b24..1263c0d 100644
--- a/admin/templates/posts.html
+++ b/admin/templates/posts.html
@@ -17,19 +17,27 @@
                 </h1>
             </div>
             <nav class="mt-6">
-                <a href="/" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                <a href="/admin" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
                     <i class="ri-dashboard-line"></i><span>仪表盘</span>
                 </a>
-                <a href="/users" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                <a href="/admin/users" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
                     <i class="ri-user-line"></i><span>用户管理</span>
                 </a>
-                <a href="/posts" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
+                <a href="/admin/posts" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
                     <i class="ri-file-text-line"></i><span>帖子管理</span>
                 </a>
-                <a href="/topics" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                <a href="/admin/topics" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
                     <i class="ri-tools-line"></i><span>主题管理</span>
                 </a>
             </nav>
+            <div class="absolute bottom-0 left-0 right-0 p-4 border-t border-slate-700">
+                <a href="/" target="_blank" class="text-slate-400 hover:text-white text-sm flex items-center gap-2">
+                    <i class="ri-external-link-line"></i> 访问前台
+                </a>
+                <button onclick="logout()" class="mt-2 text-slate-400 hover:text-red-400 text-sm flex items-center gap-2">
+                    <i class="ri-logout-box-line"></i> 退出登录
+                </button>
+            </div>
         </aside>
 
         <main class="ml-64 flex-1 p-8">
@@ -75,9 +83,25 @@
     </div>
 
     <script>
+        // 检查登录状态
+        async function checkAuth() {
+            const res = await fetch('/admin/api/check-auth');
+            const data = await res.json();
+            if (!data.logged_in) {
+                window.location.href = '/admin/login';
+            }
+        }
+        checkAuth();
+
+        // 退出登录
+        async function logout() {
+            await fetch('/admin/api/logout', { method: 'POST' });
+            window.location.href = '/admin/login';
+        }
+
         async function loadPosts() {
             const type = document.getElementById('typeFilter').value;
-            const url = type ? `/api/posts?type=${type}` : '/api/posts';
+            const url = type ? `/admin/api/posts?type=${type}` : '/admin/api/posts';
             
             const res = await fetch(url);
             const posts = await res.json();
@@ -125,7 +149,7 @@
         }
 
         async function viewPost(postId) {
-            const res = await fetch(`/api/posts/${postId}`);
+            const res = await fetch(`/admin/api/posts/${postId}`);
             const post = await res.json();
             
             document.getElementById('modalTitle').textContent = post.title;
@@ -149,11 +173,11 @@
                     <div>
                         <p class="text-sm text-gray-500 mb-2">内容</p>
                         <div class="p-4 bg-gray-50 rounded-lg text-sm text-gray-700 whitespace-pre-wrap max-h-60 overflow-auto">
-                            ${post.content}
+                            ${post.content || '无内容'}
                         </div>
                     </div>
                     
-                    ${post.replies.length > 0 ? `
+                    ${post.replies && post.replies.length > 0 ? `
                         <div>
                             <p class="text-sm text-gray-500 mb-2">回复 (${post.replies.length})</p>
                             <div class="space-y-2 max-h-40 overflow-auto">
@@ -178,7 +202,7 @@
         }
 
         async function pinPost(postId) {
-            const res = await fetch(`/api/posts/${postId}/pin`, { method: 'POST' });
+            const res = await fetch(`/admin/api/posts/${postId}/pin`, { method: 'POST' });
             const data = await res.json();
             
             if (data.success) {
@@ -189,7 +213,7 @@
         async function deletePost(postId) {
             if (!confirm('确定要删除这个帖子吗？')) return;
             
-            const res = await fetch(`/api/posts/${postId}`, { method: 'DELETE' });
+            const res = await fetch(`/admin/api/posts/${postId}`, { method: 'DELETE' });
             const data = await res.json();
             
             if (data.success) {
diff --git a/admin/templates/topics.html b/admin/templates/topics.html
index d055797..82fe903 100644
--- a/admin/templates/topics.html
+++ b/admin/templates/topics.html
@@ -17,19 +17,27 @@
                 </h1>
             </div>
             <nav class="mt-6">
-                <a href="/" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                <a href="/admin" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
                     <i class="ri-dashboard-line"></i><span>仪表盘</span>
                 </a>
-                <a href="/users" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                <a href="/admin/users" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
                     <i class="ri-user-line"></i><span>用户管理</span>
                 </a>
-                <a href="/posts" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                <a href="/admin/posts" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
                     <i class="ri-file-text-line"></i><span>帖子管理</span>
                 </a>
-                <a href="/topics" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
+                <a href="/admin/topics" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
                     <i class="ri-tools-line"></i><span>主题管理</span>
                 </a>
             </nav>
+            <div class="absolute bottom-0 left-0 right-0 p-4 border-t border-slate-700">
+                <a href="/" target="_blank" class="text-slate-400 hover:text-white text-sm flex items-center gap-2">
+                    <i class="ri-external-link-line"></i> 访问前台
+                </a>
+                <button onclick="logout()" class="mt-2 text-slate-400 hover:text-red-400 text-sm flex items-center gap-2">
+                    <i class="ri-logout-box-line"></i> 退出登录
+                </button>
+            </div>
         </aside>
 
         <main class="ml-64 flex-1 p-8">
@@ -68,8 +76,24 @@
     </div>
 
     <script>
+        // 检查登录状态
+        async function checkAuth() {
+            const res = await fetch('/admin/api/check-auth');
+            const data = await res.json();
+            if (!data.logged_in) {
+                window.location.href = '/admin/login';
+            }
+        }
+        checkAuth();
+
+        // 退出登录
+        async function logout() {
+            await fetch('/admin/api/logout', { method: 'POST' });
+            window.location.href = '/admin/login';
+        }
+
         async function loadTopics() {
-            const res = await fetch('/api/topics');
+            const res = await fetch('/admin/api/topics');
             const topics = await res.json();
             
             const tbody = document.getElementById('topicTable');
@@ -83,22 +107,22 @@
                 <tr class="border-b border-gray-50 hover:bg-gray-50">
                     <td class="px-6 py-4">
                         <div class="flex items-center gap-2">
-                            <span class="text-2xl">${t.icon}</span>
+                            <span class="text-2xl">${t.icon || '🔧'}</span>
                             <span class="font-medium text-gray-800">${t.name}</span>
                         </div>
                     </td>
                     <td class="px-6 py-4 text-gray-600">${t.author}</td>
                     <td class="px-6 py-4">
-                        <span class="px-2 py-1 bg-blue-100 text-blue-700 rounded text-xs">${t.sub_topics_count}</span>
+                        <span class="px-2 py-1 bg-blue-100 text-blue-700 rounded text-xs">${t.sub_topics_count || 0}</span>
                     </td>
                     <td class="px-6 py-4">
-                        <span class="px-2 py-1 bg-green-100 text-green-700 rounded text-xs">${t.questions_count}</span>
+                        <span class="px-2 py-1 bg-green-100 text-green-700 rounded text-xs">${t.questions_count || 0}</span>
                     </td>
                     <td class="px-6 py-4">
-                        <span class="px-2 py-1 bg-purple-100 text-purple-700 rounded text-xs">${t.followers_count}</span>
+                        <span class="px-2 py-1 bg-purple-100 text-purple-700 rounded text-xs">${t.followers_count || 0}</span>
                     </td>
                     <td class="px-6 py-4 text-sm text-gray-500">
-                        ${new Date(t.created_at).toLocaleDateString()}
+                        ${t.created_at ? new Date(t.created_at).toLocaleDateString() : '-'}
                     </td>
                     <td class="px-6 py-4">
                         <button onclick="viewTopic('${t.id}')" class="text-blue-500 hover:text-blue-700 mr-3">
@@ -113,7 +137,7 @@
         }
 
         async function viewTopic(topicId) {
-            const res = await fetch(`/api/topics/${topicId}`);
+            const res = await fetch(`/admin/api/topics/${topicId}`);
             const topic = await res.json();
             
             document.getElementById('modalTitle').textContent = topic.name;
@@ -126,27 +150,27 @@
                     
                     <div class="grid grid-cols-3 gap-4">
                         <div class="p-4 bg-blue-50 rounded-lg text-center">
-                            <div class="text-2xl font-bold text-blue-600">${topic.sub_topics.length}</div>
+                            <div class="text-2xl font-bold text-blue-600">${topic.sub_topics ? topic.sub_topics.length : 0}</div>
                             <div class="text-sm text-gray-500">子主题</div>
                         </div>
                         <div class="p-4 bg-green-50 rounded-lg text-center">
-                            <div class="text-2xl font-bold text-green-600">${topic.questions.length}</div>
+                            <div class="text-2xl font-bold text-green-600">${topic.questions ? topic.questions.length : 0}</div>
                             <div class="text-sm text-gray-500">问题</div>
                         </div>
                         <div class="p-4 bg-purple-50 rounded-lg text-center">
-                            <div class="text-2xl font-bold text-purple-600">${topic.followers_count}</div>
+                            <div class="text-2xl font-bold text-purple-600">${topic.followers_count || 0}</div>
                             <div class="text-sm text-gray-500">关注</div>
                         </div>
                     </div>
                     
-                    ${topic.questions.length > 0 ? `
+                    ${topic.questions && topic.questions.length > 0 ? `
                         <div>
                             <p class="text-sm text-gray-500 mb-2">最新问题</p>
                             <div class="space-y-2 max-h-40 overflow-auto">
                                 ${topic.questions.slice(0, 5).map(q => `
                                     <div class="p-2 bg-gray-50 rounded text-sm">
                                         <p class="font-medium">${q.title}</p>
-                                        <p class="text-gray-500 text-xs">${q.answers.length} 回答</p>
+                                        <p class="text-gray-500 text-xs">${q.answers ? q.answers.length : 0} 回答</p>
                                     </div>
                                 `).join('')}
                             </div>
@@ -167,7 +191,7 @@
         async function deleteTopic(topicId) {
             if (!confirm('确定要删除这个主题吗？')) return;
             
-            const res = await fetch(`/api/topics/${topicId}`, { method: 'DELETE' });
+            const res = await fetch(`/admin/api/topics/${topicId}`, { method: 'DELETE' });
             const data = await res.json();
             
             if (data.success) {
diff --git a/admin/templates/users.html b/admin/templates/users.html
index df2a2c1..87a1895 100644
--- a/admin/templates/users.html
+++ b/admin/templates/users.html
@@ -17,19 +17,27 @@
                 </h1>
             </div>
             <nav class="mt-6">
-                <a href="/" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                <a href="/admin" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
                     <i class="ri-dashboard-line"></i><span>仪表盘</span>
                 </a>
-                <a href="/users" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
+                <a href="/admin/users" class="flex items-center gap-3 px-6 py-3 bg-slate-700 text-white">
                     <i class="ri-user-line"></i><span>用户管理</span>
                 </a>
-                <a href="/posts" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                <a href="/admin/posts" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
                     <i class="ri-file-text-line"></i><span>帖子管理</span>
                 </a>
-                <a href="/topics" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
+                <a href="/admin/topics" class="flex items-center gap-3 px-6 py-3 text-slate-300 hover:bg-slate-700 hover:text-white">
                     <i class="ri-tools-line"></i><span>主题管理</span>
                 </a>
             </nav>
+            <div class="absolute bottom-0 left-0 right-0 p-4 border-t border-slate-700">
+                <a href="/" target="_blank" class="text-slate-400 hover:text-white text-sm flex items-center gap-2">
+                    <i class="ri-external-link-line"></i> 访问前台
+                </a>
+                <button onclick="logout()" class="mt-2 text-slate-400 hover:text-red-400 text-sm flex items-center gap-2">
+                    <i class="ri-logout-box-line"></i> 退出登录
+                </button>
+            </div>
         </aside>
 
         <main class="ml-64 flex-1 p-8">
@@ -57,8 +65,24 @@
     </div>
 
     <script>
+        // 检查登录状态
+        async function checkAuth() {
+            const res = await fetch('/admin/api/check-auth');
+            const data = await res.json();
+            if (!data.logged_in) {
+                window.location.href = '/admin/login';
+            }
+        }
+        checkAuth();
+
+        // 退出登录
+        async function logout() {
+            await fetch('/admin/api/logout', { method: 'POST' });
+            window.location.href = '/admin/login';
+        }
+
         async function loadUsers() {
-            const res = await fetch('/api/users');
+            const res = await fetch('/admin/api/users');
             const users = await res.json();
             
             const tbody = document.getElementById('userTable');
@@ -94,13 +118,13 @@
         async function deleteUser(userId) {
             if (!confirm('确定要删除这个用户吗？这将同时删除该用户的所有帖子！')) return;
             
-            const res = await fetch(`/api/users/${userId}`, { method: 'DELETE' });
+            const res = await fetch(`/admin/api/users/${userId}`, { method: 'DELETE' });
             const data = await res.json();
             
             if (data.success) {
                 loadUsers();
             } else {
-                alert('删除失败');
+                alert('删除失败: ' + (data.error || '未知错误'));
             }
         }