feat: 新增AI创作中心场景，支持改写/续写/创作

client/js/data/UserManager.js

@@ -131,4 +131,40 @@ export default class UserManager {
     if (!this.isLoggedIn) return [];
     return await get('/user/collections', { userId: this.userId });
   }
+
+  /**
+   * 获取最近游玩的故事
+   */
+  async getRecentPlayed() {
+    if (!this.isLoggedIn) return [];
+    try {
+      return await get('/user/recent-played', { userId: this.userId, limit: 10 });
+    } catch (e) {
+      return [];
+    }
+  }
+
+  /**
+   * 获取AI创作历史
+   */
+  async getAIHistory() {
+    if (!this.isLoggedIn) return [];
+    try {
+      return await get('/user/ai-history', { userId: this.userId, limit: 20 });
+    } catch (e) {
+      return [];
+    }
+  }
+
+  /**
+   * 获取AI配额
+   */
+  async getAIQuota() {
+    if (!this.isLoggedIn) return { daily: 3, used: 0, purchased: 0 };
+    try {
+      return await get('/user/ai-quota', { userId: this.userId });
+    } catch (e) {
+      return { daily: 3, used: 0, purchased: 0 };
+    }
+  }
 }