Method cleanExpired

src/context/storage/CacheStore.ts:217–228

* 清理过期项

()

   * 清理过期项
   */
  private cleanExpired(): void {
    const now = Date.now();
    const expiredKeys: string[] = [];

    for (const [key, item] of Array.from(this.cache.entries())) {
      if (now - item.timestamp > item.ttl) {
        expiredKeys.push(key);
      }
    }

    expiredKeys.forEach(key => this.cache.delete(key));
  }

  /**
   * 驱逐最不常用的项