feat: 改进评论系统管理员识别与样式展示

- 后端评论接口增加 isAdmin 字段，不再依赖前端邮箱比对
- 管理后台评论列表支持 Markdown 渲染并添加相应样式
- 前端组件移除 adminEmail 依赖，改用 comment.isAdmin 字段
- 添加 CSS 样式兼容其他框架导入的表情元素
- 更新文档说明部署流程

docs/widget/src/components/CommentItem.js

@@ -39,7 +39,8 @@ export class CommentItem extends Component {
     const { comment, isReply, adminEmail, adminBadge } = this.props;
     const isPinned = typeof comment.priority === 'number' && comment.priority > 1;
     const isReplying = this.props.replyingTo === comment.id;
-    const isAdmin = adminEmail && comment.email === adminEmail;
+    // 使用后端返回的 isAdmin 字段，不再依赖前端邮箱比对
+    const isAdmin = !!comment.isAdmin;
 
     const root = this.createElement('div', {
       className: `cwd-comment-item ${isReply ? 'cwd-comment-reply' : ''}`,
@@ -241,7 +242,7 @@ export class CommentItem extends Component {
             submitting: this.props.submitting,
             currentUser: this.props.currentUser,
             onUpdateUserInfo: this.props.onUpdateUserInfo,
-            adminEmail: this.props.adminEmail,
+            // adminEmail 已移除
             adminBadge: this.props.adminBadge,
             enableCommentLike: this.props.enableCommentLike,
             onReply: this.props.onReply,

docs/widget/src/components/CommentList.js

@@ -97,7 +97,7 @@ export class CommentList extends Component {
           submitting: this.props.submitting,
           currentUser: this.props.currentUser,
           onUpdateUserInfo: this.props.onUpdateUserInfo,
-          adminEmail: this.props.adminEmail,
+          // adminEmail 已移除，改用 comment.isAdmin 字段
           adminBadge: this.props.adminBadge,
           enableCommentLike: this.props.enableCommentLike,
           onReply: (commentId) => this.handleReply(commentId),