diff --git a/web/main.js b/web/main.js
index 9ec9500..c02adbb 100644
--- a/web/main.js
+++ b/web/main.js
@@ -503,16 +503,20 @@ const app = createApp({
 
     // ==================== 模板管理 ====================
     /**
-     * 加载模板列表
-     */
-    const loadTemplates = async () => {
-      try {
-        state.templates = await Api.fetchTemplates();
-      } catch (error) {
-        showMessage('加载模板失败', 'error');
-        state.templates = [];
-      }
-    };
+ * 加载模板列表
+ */
+const loadTemplates = async () => {
+  try {
+    state.templates = await Api.fetchTemplates();
+  } catch (error) {
+    if (error.isAuthError) {
+      showMessage('请先登录', 'error');
+    } else {
+      showMessage('加载模板失败', 'error');
+    }
+    state.templates = [];
+  }
+};
 
     /**
      * 创建模板
@@ -993,7 +997,11 @@ const app = createApp({
         state.sqlText = '';
         state.sqlExplainDesc = '';
         state.sqlVisible = false;
-        showMessage('加载SQL失败', 'error');
+        if (error.isAuthError) {
+          showMessage('请先登录', 'error');
+        } else {
+          showMessage('加载SQL失败', 'error');
+        }
       }
     };
 
diff --git a/web/modules/api.js b/web/modules/api.js
index 043e30b..feeabdb 100644
--- a/web/modules/api.js
+++ b/web/modules/api.js
@@ -153,7 +153,9 @@ const get = async (endpoint, options = {}) => {
   if (!response.ok) {
     const data = await response.json().catch(() => ({}));
     if (response.status === 401 && data.message) {
-      throw new Error(data.message);
+      const authError = new Error(data.message);
+      authError.isAuthError = true;
+      throw authError;
     }
     throw new Error(`请求失败: ${response.status} ${response.statusText}`);
   }
@@ -185,7 +187,9 @@ const post = async (endpoint, body, options = {}) => {
   if (!response.ok) {
     const data = await response.json().catch(() => ({}));
     if (response.status === 401 && data.message) {
-      throw new Error(data.message);
+      const authError = new Error(data.message);
+      authError.isAuthError = true;
+      throw authError;
     }
     const errorText = await response.text();
     throw new Error(errorText || `请求失败: ${response.status}`);
@@ -221,7 +225,9 @@ const patch = async (endpoint, body) => {
   if (!response.ok) {
     const data = await response.json().catch(() => ({}));
     if (response.status === 401 && data.message) {
-      throw new Error(data.message);
+      const authError = new Error(data.message);
+      authError.isAuthError = true;
+      throw authError;
     }
     const errorText = await response.text();
     throw new Error(errorText || `请求失败: ${response.status}`);
@@ -250,7 +256,9 @@ const del = async (endpoint, options = {}) => {
   if (!response.ok) {
     const data = await response.json().catch(() => ({}));
     if (response.status === 401 && data.message) {
-      throw new Error(data.message);
+      const authError = new Error(data.message);
+      authError.isAuthError = true;
+      throw authError;
     }
     const errorText = await response.text();
     throw new Error(errorText || `请求失败: ${response.status}`);