Refactors health doll, replaces "wounded" screen alert (#87011)

## About The Pull Request

The screen alert for being wounded is deleted

Instead, your health doll will now glow red on any (and all) wounded
limbs


https://github.com/user-attachments/assets/83565684-3e19-4753-8034-d8de6574e2b8

To accomplish this, the doll was refactored a bit. No longer operates
off of overlays, now uses vis contents across every limb, and just
updates the icon state of all those vis contents

## Why It's Good For The Game

Wounds really spam the hell out of you with screen alerts and it often
blocks you from seeing more relevant alerts that you care about

The mere presence of a minor dislocation on your leg prevents you from
noticing that you are no longer breathing. This is a bit troublesome

This can be resolved in other ways, of course - adding a priority value
to alerts? - but instead, I think we can just make better use of our
existing hud elements

I find this decently intuitive, at a glance. 
- The old screen alert gave you a tooltip saying you could click the
alert to examine yourself.
- Clicking on the health doll examines yourself the exact same way.
- So, players may see their doll glowing red, and click on it to self
examine, to see the report of them having a wound on their leg or chest
or whatever.

## Changelog

🆑 Melbert
del: Having any wounds no longer gives you an alert in the top right
qol: Having any wounds now make the corresponding bodypart on your
health doll (the lil dude on the right side of the screen) glow red.
refactor: Refactored how the hud's health doll shows up for humans.
Report any oddities
/🆑

code/_onclick/hud/screen_objects.dm

@@ -724,6 +724,88 @@
 	screen_loc = ui_living_healthdoll
 	var/filtered = FALSE //so we don't repeatedly create the mask of the mob every update
 
+/atom/movable/screen/healthdoll/human
+	/// Tracks components of our doll, each limb is a separate atom in our vis_contents
+	VAR_PRIVATE/list/atom/movable/screen/limbs
+	/// Lazylist, tracks all body zones that are wounded currently
+	/// Used so we can sync animations should the list be updated
+	VAR_PRIVATE/list/animated_zones
+
+/atom/movable/screen/healthdoll/human/Initialize(mapload, datum/hud/hud_owner)
+	. = ..()
+	limbs = list()
+	for(var/i in GLOB.all_body_zones)
+		var/atom/movable/screen/healthdoll_limb/limb = new(src, null)
+		// layer chest above other limbs, it's the center after all
+		limb.layer = i == BODY_ZONE_CHEST ? layer + 0.05 : layer
+		limbs[i] = limb
+		// why viscontents? why not overlays? - because i want to animate filters
+		vis_contents += limb
+	update_appearance()
+
+/atom/movable/screen/healthdoll/human/Destroy()
+	QDEL_LIST_ASSOC_VAL(limbs)
+	vis_contents.Cut()
+	return ..()
+
+/atom/movable/screen/healthdoll/human/update_icon_state()
+	. = ..()
+	var/mob/living/carbon/human/owner = hud?.mymob
+	if(isnull(owner))
+		return
+	if(owner.stat == DEAD)
+		for(var/limb in limbs)
+			limbs[limb].icon_state = "[limb]DEAD"
+		return
+
+	var/list/current_animated = LAZYLISTDUPLICATE(animated_zones)
+
+	for(var/obj/item/bodypart/body_part as anything in owner.bodyparts)
+		var/icon_key = 0
+		var/part_zone = body_part.body_zone
+
+		var/list/overridable_key = list(icon_key)
+		if(body_part.bodypart_disabled)
+			icon_key = 7
+		else if(owner.stat == DEAD)
+			icon_key = "DEAD"
+		else if(SEND_SIGNAL(body_part, COMSIG_BODYPART_UPDATING_HEALTH_HUD, owner, overridable_key) & OVERRIDE_BODYPART_HEALTH_HUD)
+			icon_key = overridable_key[1] // thanks i hate it
+		else if(!owner.has_status_effect(/datum/status_effect/grouped/screwy_hud/fake_healthy))
+			var/damage = body_part.get_damage() / body_part.max_damage
+			// calculate what icon state (1-5, or 0 if undamaged) to use based on damage
+			icon_key = clamp(ceil(damage * 5), 0, 5)
+
+		if(length(body_part.wounds))
+			LAZYSET(animated_zones, part_zone, TRUE)
+		else
+			LAZYREMOVE(animated_zones, part_zone)
+		limbs[part_zone].icon_state = "[part_zone][icon_key]"
+	// handle leftovers
+	for(var/missing_zone in owner.get_missing_limbs())
+		limbs[missing_zone].icon_state = "[missing_zone]6"
+		LAZYREMOVE(animated_zones, missing_zone)
+	// time to re-sync animations, something changed
+	if(animated_zones ~! current_animated)
+		for(var/animated_zone in animated_zones)
+			var/atom/wounded_zone = limbs[animated_zone]
+			var/existing_filter = wounded_zone.get_filter("wound_outline")
+			if(existing_filter)
+				animate(existing_filter) // stop animation so we can resync
+			else
+				wounded_zone.add_filter("wound_outline", 1, list("type" = "outline", "color" = "#FF0033", "alpha" = 0, "size" = 1.2))
+				existing_filter = wounded_zone.get_filter("wound_outline")
+			animate(existing_filter, alpha = 200, time = 1.5 SECONDS, loop = -1)
+			animate(alpha = 0, time = 1.5 SECONDS)
+		if(LAZYLEN(current_animated)) // avoid null - list() runtimes please
+			for(var/lost_zone in current_animated - animated_zones)
+				limbs[lost_zone].remove_filter("wound_outline")
+
+// Basically just holds an icon we can put a filter on
+/atom/movable/screen/healthdoll_limb
+	screen_loc = ui_living_healthdoll
+	vis_flags = VIS_INHERIT_ID | VIS_INHERIT_PLANE
+
 /atom/movable/screen/mood
 	name = "mood"
 	icon_state = "mood5"
@@ -904,7 +986,7 @@ INITIALIZE_IMMEDIATE(/atom/movable/screen/splash)
 			animate(get_filter("hunger_outline"), alpha = 200, time = 1.5 SECONDS, loop = -1)
 			animate(alpha = 0, time = 1.5 SECONDS)
 
-	else if(get_filter("hunger_outline"))
+	else
 		remove_filter("hunger_outline")
 
 	// Update color of the food