fix：处理模型错误添加大量文本的bug

app/resources/materials/stacked-bar-chart.json

@@ -14,7 +14,6 @@
   "renderer": "echarts",
   "group": "charts",
   "icon": "solar:chart-bold",
-  "sample_data": true,
   "usage_notes": [
     "默认图表数据仅用于演示，不是真实业务数据",
     "通过顶层 dataId 关联已有数据源，当前后端尚未实现绑定操作",
@@ -65,7 +64,8 @@
           "aliases": [
             "图例名称"
           ],
-          "panel": false
+          "panel": false,
+          "example": "label"
         },
         {
           "path": "props.option.series.1.name",
@@ -75,7 +75,8 @@
           "aliases": [
             "图例名称"
           ],
-          "panel": false
+          "panel": false,
+          "example": "label"
         },
         {
           "path": "props.option.series.2.name",
@@ -85,7 +86,8 @@
           "aliases": [
             "图例名称"
           ],
-          "panel": false
+          "panel": false,
+          "example": "label"
         }
       ]
     },