重构：CodeMirror 架构优化

核心优化：
- 新增统一导出避免多实例问题
- 语言加载器从动态改为静态导入
- 使用 Compartment 实现主题/语言动态切换

依赖清理：
- 移除废弃的 @codemirror/highlight
- 移除不再使用的 @codemirror/legacy-modes

组件优化：
- CodeEditor 添加内容更新防抖
- 改进亮色主题样式
- 移除不必要的编辑器重建逻辑

构建配置：
- 简化 Vite manualChunks 配置
- 优化依赖预加载列表

文档清理：
- 删除过期的代码审查文档
- 更新版本号 0.3.0 → 0.3.2

web/package.json

@@ -10,7 +10,6 @@
   "dependencies": {
     "@arco-design/web-vue": "^2.54.0",
     "@codemirror/commands": "^6.10.1",
-    "@codemirror/highlight": "^0.19.8",
     "@codemirror/lang-cpp": "^6.0.3",
     "@codemirror/lang-css": "^6.3.1",
     "@codemirror/lang-go": "^6.0.1",
@@ -25,7 +24,6 @@
     "@codemirror/lang-sql": "^6.10.0",
     "@codemirror/lang-yaml": "^6.1.2",
     "@codemirror/language": "^6.12.1",
-    "@codemirror/legacy-modes": "^6.5.2",
     "@codemirror/state": "^6.5.3",
     "@codemirror/theme-one-dark": "^6.1.3",
     "@codemirror/view": "^6.39.8",