Function stepVesselPosition

stepVesselPosition(
    pos: Point,
    velocity: number,
    rotationDeg: number,
    deltaTime: number,
    gridSize: number,
): Point
Advances a vessel's position by one physics step.
Parameters
- pos: Point
  Current { x, y } position in world units.
- velocity: number
  Current velocity in world units per second.
- rotationDeg: number
  Current heading in degrees (0 = north, 90 = east).
- deltaTime: number
  Elapsed time since the last step, in seconds.
- gridSize: number
  Total span of the (square) world; position wraps at ±gridSize/2.
Returns Point
The new { x, y } position, wrapped to stay within the world bounds.
- Defined in physics.ts:15