Split-screen tap scoring
The scoring interface divides the screen into two halves — one for each player. Tap the corresponding half to score a point. In portrait mode the split is top/bottom; in landscape it's left/right. A center scoreboard overlay shows the current score, set history, and tiebreak status. Flash animations in brand color confirm each tap.
Portrait layout: top/bottom player zones with center scoreboard
Landscape layout: left/right player zones with floating scoreboard overlay
Brand-color flash animation (300ms fade) confirms each scored point
Undo button accessible from the center scoreboard area