fix: JWT密钥YAML格式和401错误处理

- 修复JWT密钥在YAML配置文件中未加引号导致解析错误的问题
- 添加dashboard页面401错误处理，自动清除token并跳转登录页

frontend/src/pages/admin/index.vue

@@ -145,6 +145,7 @@ async function fetchDashboard() {
     const token = localStorage.getItem('token')
     if (!token) {
       console.error('No token found')
+      router.push('/login')
       return
     }
 
@@ -154,6 +155,13 @@ async function fetchDashboard() {
       },
     })
 
+    if (response.status === 401) {
+      localStorage.removeItem('token')
+      localStorage.removeItem('user')
+      router.push('/login')
+      return
+    }
+
     if (!response.ok) {
       throw new Error(`HTTP error! status: ${response.status}`)
     }