46b8f7bcc7
- Add GameConfig with initialBallSpeed (220px/s), speedIncrement (18px/s), paddleSpeed (400px/s) - Add Physics.serveBall(): centers ball, sets random angle (-45 to +45 deg), random left/right dir - Replace Physics.update() skeleton with full ball movement and wall bounce logic - Add Physics._checkPaddleCollision() with 5-zone angle deflection and speed increment per hit - Ball exits left/right bounds → immediate re-serve from center - Ball pushed out of paddle on collision to prevent double-hit next frame - Add on-canvas speed debug display (Phase 1 verification aid)