fix: 安全体系建设工作计划反馈新增附件上传必填

src/views/production-safety/productionSafetySystem/safetySystemConstructionWorkPlanManagementDept/components/safetySystemConstructionWorkPlanManagementDeptDetail.vue

@@ -296,6 +296,12 @@
   };
 
   const handleSubmit = async () => {
+
+    if(!form.fileUrl || form.fileUrl.length === 0) {
+      ElMessage.error('请先上传附件！');
+      return;
+    }
+
     const res = await handleValidate();
     if (!res) return;
     try {