Function applyHandPoseToKeyframe

applyHandPoseToKeyframe(
    kf: AnimationKeyframe,
    pose: HandPose,
    hand: HandSelection,
): void
Apply hand pose to an AnimationKeyframe (direct mutation)
Parameters
- kf: AnimationKeyframe
  AnimationKeyframe to apply pose to
- pose: HandPose
  Hand pose data from HAND_POSES
- hand: HandSelection
  Which hand(s) to apply ("left" | "right" | "both")
Returns void
Example
```
applyHandPoseToKeyframe(animKeyframe, HAND_POSES.GRAB, "both");
```
Korean
AnimationKeyframe에손모양적용
- Defined in systems/animation/builders/HandPoseApplicator.ts:166