Replaces the vanilla Auto-Injector Headset with a 4-slot version.
Takes the same stuff as vanilla: syringes, chems, medical items.
With Barotraumatic: load this ABOVE Barotraumatic in your mod list. That way our override wins and you keep all of Barotraumatic's headset extras (radio jam, red blink, SOS beacon, voltage on critical health). If you also run LuaCsForBarotrauma, the radio-signal affliction gets reapplied from a small script so that feature isn't lost either.
Without Barotraumatic: just works. No Lua required for the core feature, firing is handled entirely by the engine.
Identifier is unchanged, so saves aren't affected by installing or removing mid-campaign. Crafting recipe is untouched.
