Clicks refactor (#20321)

Added various events to the dcs system in regards to click handling.
Refactored various mouse related procs.
Fixed MUI mask.
Fixed AI jump on double click.
Fixed some runtimes with the click handler system.
Updated the click handler system.
Fixed fireman carry.

code/modules/mob/abstract/freelook/ai/eye.dm

@@ -1,23 +1,33 @@
-// AI EYE
-//
-// A mob that the AI controls to look around the station with.
-// It streams chunks as it moves around, which will show it what the AI can and cannot see.
 
+/// Generic version of the AI eye without the AI-specific handling, for things like the Camera MIU mask.
 /mob/abstract/eye/freelook
-	// Generic version of the AI eye without the AI-specific handling, for things like the Camera MIU mask.
 	name = "Inactive Camera Eye"
 	name_suffix = "Camera Eye"
 	living_eye = FALSE
+	click_handler_type = /datum/click_handler/eye/freelook
 
 /mob/abstract/eye/freelook/Initialize()
 	. = ..()
 	visualnet = GLOB.cameranet
 
+/datum/click_handler/eye/freelook/OnDblClick(atom/A, params)
+	var/mob/abstract/eye = user.eyeobj
+	if(!eye) //Something has broken, ensure the click handler doesn't stick around
+		user.RemoveClickHandler(src)
+		return
+	eye.DblClickOn(A, params)
+
+
+/// AI EYE
+///
+/// A mob that the AI controls to look around the station with.
+/// It streams chunks as it moves around, which will show it what the AI can and cannot see.
 /mob/abstract/eye/freelook/aiEye
 	name = "Inactive AI Eye"
 	name_suffix = "AI Eye"
 	icon_state = "AI-eye"
 	living_eye = FALSE
+	click_handler_type = /datum/click_handler/eye/freelook/aiEye
 
 /mob/abstract/eye/freelook/aiEye/Initialize()
 	. = ..()
@@ -35,6 +45,9 @@
 			ai.holo.move_hologram(ai)
 		return 1
 
+/datum/click_handler/eye/freelook/aiEye/OnDblClick(atom/A, params)
+	user.DblClickOn(A, params)
+
 // AI MOVEMENT
 
 // The AI's "eye". Described on the top of the page.

code/modules/mob/abstract/freelook/eye.dm

@@ -99,7 +99,7 @@
 		return
 	remove_visual(owner)
 	LAZYREMOVE(owner.additional_vision_handlers, src)
-	visualnet.remove_eye(src)
+	visualnet?.remove_eye(src)
 	owner.eyeobj = null
 	if(owner.client)
 		owner.client.eye = owner

code/modules/mob/abstract/ghost/ghost.dm

@@ -38,7 +38,7 @@
 			if(istype(target))
 				ManualFollow(target)
 
-/mob/abstract/ghost/ClickOn(var/atom/A, var/params)
+/mob/abstract/ghost/ClickOn(atom/A, params)
 	if(!canClick())
 		return
 	setClickCooldown(4)

code/modules/mob/abstract/ghost/storyteller/storyteller_verbs.dm

@@ -175,7 +175,7 @@
 
 	var/datum/click_handler/handler = GetClickHandler()
 	if(handler.type == /datum/click_handler/build_mode)
-		usr.PopClickHandler()
+		usr.RemoveClickHandler(/datum/click_handler/build_mode)
 	else
 		usr.PushClickHandler(/datum/click_handler/build_mode)