Function calculateMovementSpeed

calculateMovementSpeed(
    baseSpeed: number,
    bodyPartHealth: BodyPartHealth,
    stance: TrigramStance,
    painLevel: number,
): number
Calculate comprehensive movement speed with all injury modifiers.

Korean: 종합 이동 속도 계산

This is the recommended function for full integration with the new injury system. It applies all modifiers including leg injuries, torso damage, stance bonuses, and pain penalties.

Uses the shared singleton instance to avoid allocations in per-frame loops.
Parameters
- baseSpeed: number
  Base movement speed (m/s)
- bodyPartHealth: BodyPartHealth
  Current body part health
- stance: TrigramStance
  Current trigram stance
- painLevel: number
  Current pain level (0-100)
Returns number
Final calculated speed in m/s
Example
```
const finalSpeed = calculateMovementSpeed(
  5.0,
  playerBodyHealth,
  TrigramStance.GEON,
  65
);

// Use this speed to override MovementPhysics
movementPhysics.setMaxSpeed(finalSpeed);
```
Korean
종합이동속도계산
- Defined in systems/movement/integration.ts:94