Vamp lurker Tweaks (#5625)

# About the pull request


-Using Tail stab on the same tile a enemey is standing will
automatically target tailstab to the enemy.
-Sprite clicking and enemy with Tail stab now provides a Bonus 15 Dmg

# Explain why it's good for the game

after the reversal of the vamp lurker rework it was left in a very weak
state . only a handfull of players being able to play it decently. this
PR aims to make it a little easier for players to use vamp lurker.


# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

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screenshots and the `<details>` tags.

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# Changelog
:cl:
balance: Tail Jab will now target enemies on the same tile it was
targeted.
balance: Aiming Tail Jab directly on a target will do an additional 15
damage
/:cl:

---------

Co-authored-by: Drathek <[email protected]>

code/modules/mob/living/carbon/xenomorph/abilities/lurker/lurker_powers.dm

@@ -215,7 +215,7 @@
 	if(distance > 2)
 		return
 
-	var/list/turf/path = get_line(xeno, hit_target, include_start_atom = FALSE)
+	var/list/turf/path = get_line(xeno, targeted_atom, include_start_atom = FALSE)
 	for(var/turf/path_turf as anything in path)
 		if(path_turf.density)
 			to_chat(xeno, SPAN_WARNING("There's something blocking us from striking!"))
@@ -237,8 +237,20 @@
 			if(current_structure.density && !current_structure.throwpass)
 				to_chat(xeno, SPAN_WARNING("There's something blocking us from striking!"))
 				return
-
-	if(!isxeno_human(hit_target) || xeno.can_not_harm(hit_target) || hit_target.stat == DEAD)
+	// find a target in the target turf
+	if(!iscarbon(targeted_atom) || hit_target.stat == DEAD)
+		for(var/mob/living/carbon/carbonara in get_turf(targeted_atom))
+			hit_target = carbonara
+			if(!xeno.can_not_harm(hit_target) && hit_target.stat != DEAD)
+				break
+
+	if(iscarbon(hit_target) && !xeno.can_not_harm(hit_target) && hit_target.stat != DEAD)
+		if(targeted_atom == hit_target) //reward for a direct hit
+			to_chat(xeno, SPAN_XENOHIGHDANGER("We directly slam [hit_target] with our tail, throwing it back after impaling it on our tail!"))
+			hit_target.apply_armoured_damage(15, ARMOR_MELEE, BRUTE, "chest")
+		else
+			to_chat(xeno, SPAN_XENODANGER("We attack [hit_target] with our tail, throwing it back after stabbing it with our tail!"))
+	else
 		xeno.visible_message(SPAN_XENOWARNING("\The [xeno] swipes their tail through the air!"), SPAN_XENOWARNING("We swipe our tail through the air!"))
 		apply_cooldown(cooldown_modifier = 0.2)
 		playsound(xeno, 'sound/effects/alien_tail_swipe1.ogg', 50, TRUE)
@@ -247,11 +259,8 @@
 	// FX
 	var/stab_direction
 
-	to_chat(xeno, SPAN_XENOHIGHDANGER("We directly slam [hit_target] with our tail, throwing it back after impaling it on our tail!"))
+	stab_direction = turn(get_dir(xeno, targeted_atom), 180)
 	playsound(hit_target,'sound/weapons/alien_tail_attack.ogg', 50, TRUE)
-
-	stab_direction = turn(get_dir(xeno, hit_target), 180)
-
 	if(hit_target.mob_size < MOB_SIZE_BIG)
 		step_away(hit_target, xeno)