feat: 添加内容字段的验证规则，确保用户输入内容

src/views/news/components/add.vue

@@ -31,7 +31,8 @@ const formModel = ref<NewsItem>({
 
 const rules: FormRules = {
   title: [{ required: true, message: '请输入标题', trigger: 'blur' }],
-  summary: [{ required: true, message: '请输入摘要', trigger: 'blur' }]
+  summary: [{ required: true, message: '请输入摘要', trigger: 'blur' }],
+  content: [{ required: true, message: '请输入内容', trigger: 'blur' }]
 };
 
 async function handleSubmit() {