The synth brain surgery now targets the chest and only applies for sy…

…nths (#25308)

* It's a synth surgery

* This might be a bit better

* organising

modular_skyrat/modules/synths/code/surgery/robot_brain_surgery.dm

@@ -10,10 +10,17 @@
 	)
 
 	target_mobtypes = list(/mob/living/carbon/human)
-	possible_locs = list(BODY_ZONE_HEAD)
+	possible_locs = list(BODY_ZONE_CHEST) // The brains are in the chest
 	requires_bodypart_type = BODYTYPE_ROBOTIC
 	desc = "A surgical procedure that restores the default behavior logic and personality matrix of an IPC posibrain."
 
+/datum/surgery/robot_brain_surgery/can_start(mob/user, mob/living/carbon/target, obj/item/tool)
+	var/obj/item/organ/internal/brain/synth/brain = target.get_organ_slot(ORGAN_SLOT_BRAIN)
+	if(!istype(brain) && !issynthetic(target))
+		return FALSE
+	else
+		return TRUE
+
 /datum/surgery_step/fix_robot_brain
 	name = "fix posibrain"
 	implements = list(
@@ -24,10 +31,6 @@
 	repeatable = TRUE
 	time = 12 SECONDS //long and complicated
 
-/datum/surgery/robot_brain_surgery/can_start(mob/user, mob/living/carbon/target, obj/item/tool)
-	var/obj/item/organ/internal/brain/brain = target.get_organ_slot(ORGAN_SLOT_BRAIN)
-	return !!brain
-
 /datum/surgery_step/fix_robot_brain/preop(mob/user, mob/living/carbon/target, target_zone, obj/item/tool, datum/surgery/surgery)
 	display_results(
 		user,