start_timer() : 启动计时器开始倒计时。 pause_timer() : 暂停计时器并记录已用时间。 reset_timer() : 重置计时器为初始状态。 get_time_elapsed() : 返回计时器当前已使用的时间

start_timer(): Start the timer and begin counting down. pause_timer(): Pause the timer and record the elapsed time. reset_timer(): Reset the timer to its initial state. get_time_elapsed(): Return the current elapsed time of the timer. is_timer_active: A boolean indicating whether there is a task currently in progress. time_remaining: An integer representing the remaining time for the current task. Protected: total_time: An integer representing the total time (in seconds) set for the task. is_break: A boolean indicating whether the timer is currently in break mode. start_break(): Start a break period and begin counting down using the Pomodoro technique. end_break(): End the break period and resume counting down for the task.