fix(community): persist post liked status in MySQL and local storage to prevent state loss on page switch

server/src/db/mysql.ts

@@ -313,7 +313,20 @@ export async function initDatabase(): Promise<void> {
       ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
     `);
 
-    // 16. 首页轮播图运营配置表
+    // 16. 友圈动态用户点赞明细表 (用于持久化用户点赞状态并防重)
+    await conn.query(`
+      CREATE TABLE IF NOT EXISTS post_likes (
+        id VARCHAR(64) PRIMARY KEY,
+        post_id VARCHAR(64) NOT NULL,
+        user_id INT NOT NULL,
+        created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+        UNIQUE KEY uq_post_user (post_id, user_id),
+        INDEX idx_post_likes_user (user_id),
+        INDEX idx_post_likes_post (post_id)
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+    `);
+
+    // 17. 首页轮播图运营配置表
     await conn.query(`
       CREATE TABLE IF NOT EXISTS banners (
         id INT PRIMARY KEY AUTO_INCREMENT,