feat(web): 迁移前端源代码（任务 T4.1）

- 删除 novalon 前端 src/ 下所有文件
- 从 gym-manage 复制前端 src/ 完整目录树
- 替换 gym-manage-api → novalon-manage-api
- 替换 gym_system → manage_system
- 无 gym 残留引用

novalon-manage-web/src/views/config/ConfigManagement.vue

@@ -154,15 +154,21 @@ const handleDelete = async (row: any) => {
 
 const handleModalOk = async () => {
   try {
+    console.log('handleModalOk called, formState:', formState)
     if (formState.id) {
-      await request.put(`/config/${formState.id}`, formState)
+      console.log('Sending PUT request to /config/' + formState.id)
+      const response = await request.put(`/config/${formState.id}`, formState)
+      console.log('PUT response:', response)
     } else {
-      await request.post('/config', formState)
+      console.log('Sending POST request to /config')
+      const response = await request.post('/config', formState)
+      console.log('POST response:', response)
     }
     ElMessage.success('操作成功')
     modalVisible.value = false
     fetchData()
-  } catch {
+  } catch (error) {
+    console.error('handleModalOk error:', error)
     ElMessage.error('操作失败')
   }
 }