THE key QL stair mechanic: skip velocity clip in PM_StepSlideMove when
velocity is moving away from the step surface (dot product >= 0). Q3
always clips, zeroing vertical momentum on every step. QL preserves
upward velocity through steps, enabling smooth bunny-hop stair traversal.
Also includes:
- Remove Q3 velocity[2]>0 gate (pm_airSteps): allow step-ups during jumps
- pml.isStepJump flag for step jump context in PM_Jump
- PM_Jump: additive velocity for step jumps (+=270, min 270, max 700)
- 100ms jump cooldown via lastJumpTime
Has known glitches — saved for reference before fixing.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
