style(components): 调整组件样式和按钮尺寸

- 修改 CuteSectionTitle 图标字体大小从 20px 为 18px
- 为 CuteSectionTitle 中的按钮添加 size="mini" 属性
- 在 CuteOtherDemo 中增加多个操作按钮示例

cutejava-front/src/views/components/dev/CuteSectionTitle.vue

@@ -8,7 +8,7 @@
   <el-row>
     <el-col :span="12">
       <h4>
-        <i class="el-icon-s-help" style="color: #409EFF;font-size: 20px" />
+        <i class="el-icon-s-help" style="color: #409EFF;font-size: 18px" />
         <i style="color: #303133;">{{ title }}</i>
       </h4>
     </el-col>

cutejava-front/src/views/componentsDemo/CuteOtherDemo.vue

@@ -42,7 +42,9 @@
     </cute-screen-shot>
     <el-divider>CuteSectionTitle</el-divider>
     <cute-section-title title="段落标题">
-      <el-button type="danger">操作按钮</el-button>
+      <el-button type="danger" size="mini">操作按钮1</el-button>
+      <el-button type="danger" size="mini">操作按钮2</el-button>
+      <el-button type="danger" size="mini">操作按钮3</el-button>
     </cute-section-title>
   </div>
 </template>