Hooks WorldIntersectionTest (0x480DF0) to detect when the raycast hits a
unit/player, then re-calls the original with GO-only flags (0x04). If an
interactable GO is behind the unit/player on the same ray, replaces the
hit result so the game targets the GO instead.
Uses CallSpellCastHandler (0x5F8800) for interactability filtering —
any usable GO (mailboxes, soulwells, portals, etc.) triggers click-through.
