Refactor ladders so that they actually work (#32797)

code/modules/awaymissions/mission_code/Academy.dm

@@ -47,7 +47,7 @@
 /obj/item/paper/fluff/awaymissions/academy/grade/aplus
 	name = "Summoning Midterm Exam"
 	info = "Grade: A+ Educator's Notes: Excellent form."
-	
+
 /obj/item/paper/fluff/awaymissions/academy/grade/bminus
 	name = "Summoning Midterm Exam"
 	info = "Grade: B- Educator's Notes: Keep applying yourself, you're showing improvement."
@@ -55,7 +55,7 @@
 /obj/item/paper/fluff/awaymissions/academy/grade/dminus
 	name = "Summoning Midterm Exam"
 	info = "Grade: D- Educator's Notes: SEE ME AFTER CLASS."
-	
+
 /obj/item/paper/fluff/awaymissions/academy/grade/failure
 	name = "Pyromancy Evaluation"
 	info = "Current Grade: F. Educator's Notes: No improvement shown despite multiple private lessons.  Suggest additional tutilage."
@@ -335,7 +335,7 @@
 			target_mob.Move(T)
 
 /obj/structure/ladder/unbreakable/rune
-	name = "Teleportation Rune"
+	name = "\improper Teleportation Rune"
 	desc = "Could lead anywhere."
 	icon = 'icons/obj/rune.dmi'
 	icon_state = "1"
@@ -347,7 +347,6 @@
 /obj/structure/ladder/unbreakable/rune/show_fluff_message(up,mob/user)
 	user.visible_message("[user] activates \the [src].","<span class='notice'>You activate \the [src].</span>")
 
-/obj/structure/ladder/can_use(mob/user)
-	if(user.mind in SSticker.mode.wizards)
-		return 0
-	return 1
+/obj/structure/ladder/unbreakable/rune/use(mob/user, is_ghost=FALSE)
+	if(is_ghost || !(user.mind in SSticker.mode.wizards))
+		..()

code/modules/mining/lavaland/necropolis_chests.dm

@@ -579,17 +579,18 @@
 	var/ladder_x = T.x
 	var/ladder_y = T.y
 	to_chat(user, "<span class='notice'>You unfold the ladder. It extends much farther than you were expecting.</span>")
+	var/last_ladder = null
 	for(var/i in 1 to world.maxz)
-		if(i == ZLEVEL_CENTCOM || i == ZLEVEL_TRANSIT)
+		if(i == ZLEVEL_CENTCOM || i == ZLEVEL_TRANSIT || i == ZLEVEL_CITYOFCOGS)
 			continue
 		var/turf/T2 = locate(ladder_x, ladder_y, i)
-		new /obj/structure/ladder/unbreakable/jacob(T2)
+		last_ladder = new /obj/structure/ladder/unbreakable/jacob(T2, null, last_ladder)
 	qdel(src)
 
+// Inherit from unbreakable but don't set ID, to suppress the default Z linkage
 /obj/structure/ladder/unbreakable/jacob
 	name = "jacob's ladder"
 	desc = "An indestructible celestial ladder that violates the laws of physics."
-	auto_connect = TRUE
 
 ///Bosses