17 NOV clean code and add getDayString method
17 NOV clean code
18 NOV merge exercise and sleep to singleDurationChart
18 NOV update Graph UI
18 NOV update Graph UI
19 NOV Done merge Single with Accumulate
19 NOV fix bug with recommendDurationLine
19 NOV fix bug on time sync
19 NOV add support ideal exercise duration
19 NOV update setting ui