fix: 🐛 修复系统配置页保存配置的bug

frontend/src/store/config.ts

@@ -19,7 +19,7 @@ export const useConfigStore = defineStore('config', {
       this.error = null
       try {
         const response = await configApi.getAllConfigs()
-        this.configs = response.data
+        this.configs = response.data || {}
         return response
       } catch (error) {
         this.error = error

frontend/src/views/admin/Login.vue

@@ -14,7 +14,7 @@
         label-width="80px"
         class="login-form-inner"
       >
-        <el-form-item label="管理员账号" prop="username">
+        <el-form-item label="账号" prop="username">
           <el-input
               v-model="loginForm.username"
               placeholder="请输入管理员账号"

frontend/src/views/admin/SystemConfig.vue

@@ -254,6 +254,12 @@ const loadSystemConfig = async () => {
     // 将获取到的配置映射到表单中
     if (response && response.success && response.data) {
       const configData = response.data
+      
+      // 处理布尔值转换
+      if (configData.maintenance_mode !== undefined) {
+        configData.maintenance_mode = configData.maintenance_mode === 'true' || configData.maintenance_mode === true
+      }
+      
       Object.assign(configForm, configData)
     }
   } catch (error) {
@@ -267,7 +273,9 @@ const handleSaveConfig = async () => {
   try {
     // 遍历配置表单，逐个保存配置项
     for (const [key, value] of Object.entries(configForm)) {
-      await configStore.updateConfig({ key, value })
+      // 处理布尔值转换为字符串
+      const saveValue = typeof value === 'boolean' ? value.toString() : value
+      await configStore.updateConfig({ key, value: saveValue })
     }
     
     ElMessage.success('配置保存成功')