修复enabledFeatures解析问题：前端将JSON字符串解析为对象

frontend/src/api/dingtalk.ts

@@ -12,7 +12,8 @@ export interface DingTalkConfig {
   robotWebhook?: string
   robotSecret?: string
   enabled: number
-  enabledFeatures?: {
+  // enabledFeatures在数据库中存储为JSON字符串，但在前端使用时会解析为对象
+  enabledFeatures?: string | {
     notification?: boolean
     login?: boolean
     attendance?: boolean

frontend/src/views/Settings.vue

@@ -2307,10 +2307,27 @@ const loadDingTalkConfig = async () => {
     if (config) {
       Object.assign(dingTalkConfig, config)
       // 解析启用的功能
+      // enabledFeatures在数据库中存储为JSON字符串，需要解析
       if (config.enabledFeatures) {
-        enabledFeaturesList.value = Object.entries(config.enabledFeatures)
+        let featuresObj: Record<string, boolean> = {}
+        if (typeof config.enabledFeatures === 'string') {
+          // 如果是字符串，需要解析为对象
+          try {
+            featuresObj = JSON.parse(config.enabledFeatures)
+          } catch (e) {
+            console.error('解析enabledFeatures JSON失败:', e)
+            featuresObj = {}
+          }
+        } else {
+          // 如果已经是对象，直接使用
+          featuresObj = config.enabledFeatures as Record<string, boolean>
+        }
+        
+        enabledFeaturesList.value = Object.entries(featuresObj)
           .filter(([, v]) => v)
           .map(([k]) => k)
+      } else {
+        enabledFeaturesList.value = []
       }
     }
   } catch (error) {