• Restored standard head-relative movement: HEAD now makes left-stick
  movement follow the headset direction without automatically rotating the
  gameplay camera.
• Made HEAD the Movement Direction default for fresh configurations.
  Existing saved Movement Direction choices remain unchanged.
• Preserved the previous head-yaw steering behavior as the separate
  HEAD TURN EXPERIMENTAL movement option, including its saved sensitivity.
• Enabled the gameplay HUD by default for new installations so mission
  instructions are visible even when a player never opens the VR settings.
  Existing GameplayHud choices remain unchanged.
• Completed tracked operation of the scripted helicopter-mounted M60: stable
  weapon aim, independent trigger fire, optional support-hand grip, no radio
  input conflict, and no collision with the player's own helicopter.