Method setupCleanup

Clockin.js:222–245

()

        // 页面卸载清理
        setupCleanup() {
            const cleanup = () => {
                // 清理所有定时器
                this.timers.forEach(timer => {
                    clearInterval(timer);
                    clearTimeout(timer);
                });
                this.timers = [];
                
                // 清理签到定时器
                if (this.nextSignTimer) {
                    clearTimeout(this.nextSignTimer);
                    this.nextSignTimer = null;
                }
                
                if (this.isMaster) {
                    localStorage.removeItem(STORAGE_KEYS.masterWindow);
                    localStorage.removeItem(STORAGE_KEYS.lastHeartbeat);
                }
            };

            window.addEventListener('beforeunload', cleanup);
            window.addEventListener('pagehide', cleanup);
        }

        // 添加操作日志
        addLog(message) {