Jason Dekarske 72ffa15489 feat(physics): µ(v) friction, pure velocity, open boundaries
Replace weight-scaled rapier damping with pure initial velocity (m/s),
piecewise-linear ice µ(v) table, and post-step a=−µ_eff·g·unit(v) drag.
Remove left/right/back wall colliders; OOB stones leave via prune only.
game.rs maps legacy weight→velocity via MIN/MAX until B3.
Calibrated DRAW_VELOCITY=2.38 m/s lands near tee (±0.8 m).

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
2026-07-10 23:32:03 -07:00
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