fix: 修改重命名可以无数据的问题

src/components/ChartItemSetting/NameSetting.vue

@@ -2,11 +2,15 @@
   <setting-item-box name="名称" :alone="true">
     <n-input
       type="text"
-      maxlength="6"
+      maxlength="12"
-      show-count
+      minlength="1"
       placeholder="请输入图表名称"
       size="small"
+      clearable
+      show-count
       v-model:value="chartConfig.title"
+      @focus="handleFocus"
+      @blur="handleBlur"
     ></n-input>
   </setting-item-box>
 </template>
@@ -23,4 +27,16 @@ const props = defineProps({
   },
 })
 
+let valueCatch = ''
+
+const handleFocus = () => {
+  valueCatch = props.chartConfig.title
+}
+
+const handleBlur = () => {
+  if(!props.chartConfig.title.length) {
+    window['$message'].warning('请输入至少一个字符!')
+    props.chartConfig.title = valueCatch 
+  }
+}
 </script>