feat: enhance demo components with consistent styling and info boxes

- Add standardized header and info box components to all demo files
- Improve visual consistency with theme colors and spacing
- Add max-height and overflow-y for better content containment
- Update package.json build script with --force flag
- Add .gitignore entries for REFACTORING files
- Fix table formatting in audio-intro.md

docs/.vitepress/theme/components/appendix/cloud-storage-cdn/UploadProcessDemo.vue

@@ -4,9 +4,10 @@
 -->
 <template>
   <div class="upload-process-demo">
-    <div class="header">
-      <div class="title">文件上传流程</div>
-      <div class="subtitle">直传 vs 分片上传 vs 断点续传</div>
+    <div class="demo-header">
+      <span class="icon">📤</span>
+      <span class="title">文件上传流程</span>
+      <span class="subtitle">理解直传、分片、断点续传三种方式</span>
     </div>
 
     <!-- 上传方式选择 -->
@@ -179,6 +180,11 @@
         </div>
       </div>
     </div>
+
+    <div class="info-box">
+      <span class="icon">💡</span>
+      <strong>核心思想：</strong>大文件分片上传提高可靠性，网络中断可以从断点续传，避免重复上传整个文件。
+    </div>
   </div>
 </template>