feat: 加减签，节点名称必填、字数限制

src/views/approve/components/addSignDialog.vue

@@ -23,8 +23,8 @@
 					<el-option v-for="item in userOptList" :key="item.value" :label="item.label" :value="item.value" />
 				</el-select>
 			</el-form-item>
-			<el-form-item label="节点名称" prop="nodeName">
-				<el-input v-model="form.nodeName" placeholder="请输入节点名称" />
+			<el-form-item label="节点名称" prop="nodeName" :rules="[{ required: true, message: '请填写节点名称' }]">
+				<el-input v-model="form.nodeName" placeholder="请输入节点名称" maxlength="50"/>
 			</el-form-item>
 
 			<el-form-item label="审批意见" prop="content">