```

fix(LearningSystem): 修复课程详情页面标题显示错误

- 将课程详情页面的标题从 courseCategoryName 改为 courseTitle，
确保显示正确的课程标题信息

feat(LearningSystem): 为评论组件添加字数限制显示

- 在评论输入框中添加 show-word-limit 属性，
实时显示当前输入字数和最大字数限制
```

src/pages/LearningSystem/CourseDetail.vue

@@ -5,7 +5,7 @@
       <div class="flex_1 bg_color_fff padding16 border_radius_16 box_shadow_card fit_content">
         <div class="gap10">
           <el-button type="primary">{{info.skillTagName}}</el-button>
-          <div class="bold font_size30">{{info.courseCategoryName}}({{chapterInfo.chapterOrderName}})</div>
+          <div class="bold font_size30">{{info.courseTitle}}({{chapterInfo.chapterOrderName}})</div>
         </div>
         <div class="gap5 mt10">
           <img :src="riliIcon" alt="" style="width: 16px; height: 16px;">

src/pages/LearningSystem/components/pinglun.vue

@@ -7,6 +7,7 @@
         <div class="flex-between">
           <el-input type="textarea" v-model="comments" placeholder="请输入"  
           autosize
+          show-word-limit
           maxlength="500" style="width: 100%;flex:1;min-height:44px"/>
           <el-button type="primary" size="large" 
           :loading="isSubmiting"