fix: 选项卡空标题样式错位

frontend/src/components/widget/DeWidget/DeTabs.vue

@@ -93,7 +93,7 @@
       />
       <span slot="footer" class="dialog-footer">
         <el-button @click="dialogVisible = false">{{ $t('table.cancel') }}</el-button>
-        <el-button :disabled="!textarea" type="primary" @click="sureCurTitle">{{ $t('table.confirm') }}</el-button>
+        <el-button :disabled="!titleValid" type="primary" @click="sureCurTitle">{{ $t('table.confirm') }}</el-button>
       </span>
     </el-dialog>
 
@@ -202,6 +202,9 @@ export default {
     },
     borderActiveColor() {
       return this.element && this.element.style && this.element.style.headBorderActiveColor || 'none'
+    },
+    titleValid() {
+      return !!this.textarea && !!this.textarea.trim()
     }
   },
   watch: {