Zombies can now succumb (#70883)

fixes #70877

Mobs with NODEATH can now succumb if they choose. The only mobs with
NODEATH are all zombies, memento mori and penthrite, of which zombies
are the only one that can ever enter hardcrit. I think it's fair to let
them die if they want.

High-functioning zombies can't succumb by whispering, but pressing the
succumb UI without whispering will succumb you

🆑
tweak: Mobs with NODEATH can now succumb (this is literally only
zombies)
/🆑

code/__DEFINES/traits.dm

@@ -244,6 +244,8 @@ Remember to update _globalvars/traits.dm if you're adding/removing/renaming trai
 #define TRAIT_NOSOFTCRIT "nosoftcrit"
 #define TRAIT_MINDSHIELD "mindshield"
 #define TRAIT_DISSECTED "dissected"
+/// Lets the user succumb even if they got NODEATH
+#define TRAIT_SUCCUMB_OVERRIDE "succumb_override"
 /// Can hear observers
 #define TRAIT_SIXTHSENSE "sixth_sense"
 #define TRAIT_FEARLESS "fearless"

code/_onclick/hud/alert.dm

@@ -413,8 +413,13 @@ or shoot a gun to move around via Newton's 3rd Law of Motion."
 	if(!.)
 		return
 	var/mob/living/living_owner = owner
-	var/last_whisper = tgui_input_text(usr, "Do you have any last words?", "Goodnight, Sweet Prince")
-	if(isnull(last_whisper) || !CAN_SUCCUMB(living_owner))
+	var/last_whisper
+	if(!HAS_TRAIT(living_owner, TRAIT_SUCCUMB_OVERRIDE))
+		last_whisper = tgui_input_text(usr, "Do you have any last words?", "Goodnight, Sweet Prince")
+	if(isnull(last_whisper))
+		if(!HAS_TRAIT(living_owner, TRAIT_SUCCUMB_OVERRIDE))
+			return
+	if(!CAN_SUCCUMB(living_owner) && !HAS_TRAIT(living_owner, TRAIT_SUCCUMB_OVERRIDE))
 		return
 	if(length(last_whisper))
 		living_owner.say("#[last_whisper]")

code/modules/mob/living/carbon/human/species_types/zombies.dm

@@ -16,6 +16,7 @@
 		TRAIT_NOBREATH,
 		TRAIT_NOCLONELOSS,
 		TRAIT_NODEATH,
+		TRAIT_SUCCUMB_OVERRIDE,
 		TRAIT_NOHUNGER,
 		TRAIT_NOMETABOLISM,
 		TRAIT_RADIMMUNE,
@@ -89,6 +90,23 @@
 	/// The cooldown before the zombie can start regenerating
 	COOLDOWN_DECLARE(regen_cooldown)
 
+	inherent_traits = list(
+		TRAIT_EASILY_WOUNDED,
+		TRAIT_EASYDISMEMBER,
+		TRAIT_FAKEDEATH,
+		TRAIT_LIMBATTACHMENT,
+		TRAIT_NOBREATH,
+		TRAIT_NOCLONELOSS,
+		TRAIT_NODEATH,
+		TRAIT_NOHUNGER,
+		TRAIT_NOMETABOLISM,
+		TRAIT_RADIMMUNE,
+		TRAIT_RESISTCOLD,
+		TRAIT_RESISTHIGHPRESSURE,
+		TRAIT_RESISTLOWPRESSURE,
+		TRAIT_TOXIMMUNE,
+	)
+
 /datum/species/zombie/infectious/check_roundstart_eligible()
 	return FALSE
 

code/modules/mob/living/init_signals.dm

@@ -188,7 +188,7 @@
  */
 /mob/living/proc/update_succumb_action()
 	SIGNAL_HANDLER
-	if (CAN_SUCCUMB(src))
+	if (CAN_SUCCUMB(src) || HAS_TRAIT(src, TRAIT_SUCCUMB_OVERRIDE))
 		throw_alert(ALERT_SUCCUMB, /atom/movable/screen/alert/succumb)
 	else
 		clear_alert(ALERT_SUCCUMB)

code/modules/mob/living/living.dm

@@ -433,8 +433,13 @@
 /mob/living/verb/succumb(whispered as null)
 	set hidden = TRUE
 	if (!CAN_SUCCUMB(src))
-		to_chat(src, text="You are unable to succumb to death! This life continues.", type=MESSAGE_TYPE_INFO)
-		return
+		if(HAS_TRAIT(src, TRAIT_SUCCUMB_OVERRIDE))
+			if(whispered)
+				to_chat(src, text="You are unable to succumb to death! Unless you just press the UI button.", type=MESSAGE_TYPE_INFO)
+				return
+		else
+			to_chat(src, text="You are unable to succumb to death! This life continues.", type=MESSAGE_TYPE_INFO)
+			return
 	log_message("Has [whispered ? "whispered his final words" : "succumbed to death"] with [round(health, 0.1)] points of health!", LOG_ATTACK)
 	adjustOxyLoss(health - HEALTH_THRESHOLD_DEAD)
 	updatehealth()

code/modules/mob/living/living_say.dm

@@ -477,7 +477,7 @@ GLOBAL_LIST_INIT(message_modes_stat_limits, list(
 /mob/living/say_mod(input, list/message_mods = list())
 	if(message_mods[WHISPER_MODE] == MODE_WHISPER)
 		. = verb_whisper
-	else if(message_mods[WHISPER_MODE] == MODE_WHISPER_CRIT)
+	else if(message_mods[WHISPER_MODE] == MODE_WHISPER_CRIT && !HAS_TRAIT(src, TRAIT_SUCCUMB_OVERRIDE))
 		. = "[verb_whisper] in [p_their()] last breath"
 	else if(message_mods[MODE_SING])
 		. = verb_sing