Variable KNEE_STRIKE_ANIMATION_ENHANCEDConst

Enhanced knee strike animation with proper recovery phase

Korean: 복귀 단계가 포함된 무릎차기

Original duration: 400ms Enhanced duration: 590ms (400ms technique + 190ms recovery)

Recovery characteristics:

• Moderate 190ms recovery (balance restoration from single-leg position)
• 85% intermediate return (complete balance restoration needed)
• Higher final tension (0.12) for stable grounded position