feat: 实现文章点赞功能及相关API和UI组件

- 新增点赞功能API接口及数据库表结构
- 添加点赞状态管理及UI交互组件
- 实现点赞统计和列表查询功能
- 优化评论组件布局，将点赞按钮加入头部区域

docs/widget/src/core/store.js

@@ -126,6 +126,8 @@ export function createCommentStore(config, fetchComments, submitComment) {
 		replyingTo: null,
 		replyContent: '',
 		replyError: null,
+		likeCount: 0,
+		liked: false,
 	});
 
 	// 监听用户信息变化，自动保存到 localStorage
@@ -165,6 +167,14 @@ export function createCommentStore(config, fetchComments, submitComment) {
 		}
 	}
 
+	function setLikeState(likeCount, liked) {
+		const safeCount = typeof likeCount === 'number' && Number.isFinite(likeCount) && likeCount >= 0 ? likeCount : 0;
+		store.setState({
+			likeCount: safeCount,
+			liked: !!liked,
+		});
+	}
+
 	/**
 	 * 提交评论
 	 */
@@ -362,7 +372,7 @@ export function createCommentStore(config, fetchComments, submitComment) {
 		}
 	}
 
-	return {
+		return {
 		// Store 实例
 		store,
 
@@ -384,5 +394,6 @@ export function createCommentStore(config, fetchComments, submitComment) {
 		clearError,
 		clearSuccess,
 		goToPage,
+		setLikeState,
 	};
 }