TPG.Repair.Update

Give or take the repair torch for one player, for this frame. Safe to call every frame: both branches check what the player is already holding first, so a player standing still in their safezone is not handed a new torch sixty-six times a second. A player who had the torch out when they leave the zone loses it mid-swing and the engine picks another weapon for them. That is deliberate and is the whole rule -- a grace period would be a window to weld in, which is what the safezone condition exists to prevent.