fix：处理模型错误添加大量文本的bug

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

@@ -15,7 +15,6 @@
   "renderer": "echarts",
   "group": "charts",
   "icon": "solar:chart-2-linear",
-  "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",
@@ -72,7 +71,8 @@
           "aliases": [
             "柱子名称"
           ],
-          "panel": false
+          "panel": false,
+          "example": "label"
         },
         {
           "path": "props.option.series.1.name",
@@ -82,7 +82,8 @@
           "aliases": [
             "折线名称"
           ],
-          "panel": false
+          "panel": false,
+          "example": "label"
         },
         {
           "path": "props.option.series.0.barWidth",
@@ -109,7 +110,8 @@
           "span": 12,
           "aliases": [
             "左轴标题"
-          ]
+          ],
+          "example": "label"
         },
         {
           "path": "props.option.yAxis.1.name",
@@ -119,7 +121,8 @@
           "span": 12,
           "aliases": [
             "右轴标题"
-          ]
+          ],
+          "example": "label"
         },
         {
           "path": "props.option.yAxis.1.axisLabel.formatter",