This is a simpletennis tactics board application.

main function :
● Supports board background color and board style
● Supports display of player name, number, and position
● Supports player colors, sizes and themes
● Support for player editing
● Board sharing support
● Supports drawing mode
● Support for saving and loading boards
● Supports Korean, English, German, Spanish, French, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Thai, Turkish, Vietnamese, Simplified Chinese, and Traditional Chinese.
● Dark theme support