Dino Jump: Fully Restored Classic Chrome Dino Jump Physics – No More Floaty Jump

The dino's jump is now a faithful port of the original Chrome dino: identical height, arc, and speed feel. No more floaty "moon jumps."

Jump height is now one consistent curve across all difficulties — difficulty changes speed and obstacles, not how high you jump.

Slightly higher jump at high speed, matching the original.

Fixes: camera/gesture input type error and a build error.