[NO GBP] Fix to burned mess (#92684)

## About The Pull Request
#92394 did more harm than good.

First, only the microwavable element transferred reagents even if the
result was a burned mess (in general, a non-positive one), while
grillable and bakeable comps didn't... but that's because I've
overlooked a few checks that skipped the "transfer reagents to the
result" step, which the microwavable element also has, though it stopped
working as intended after I messed with it.
However, I think it's stupid for bad recipes to have a static amount of
"bad food" reagent in them, and overcooking a whole cake shouldn't yield
the same reagents as a bag of chips burned to a crisp, so I scrapped
those damn bad_result checks, and finally let the burned mess item
itself handle converting the consumable reagents into "bad food".

Second, examining most food items no longer tells you that you can make
a burned mess if you microwave it.

## Why It's Good For The Game
This fixes the above issues.

## Changelog

🆑
fix: Examining most food items no longer tells you that you can make
burned mess by microwaving them.
fix: Burned mess now has "bad food" in it more or less proportional to
the nutrients of the item you just overcooked. This also applies to
decomposition now.
/🆑

code/datums/elements/food/microwavable.dm

@@ -2,28 +2,30 @@
 /datum/element/microwavable
 	element_flags = ELEMENT_BESPOKE
 	argument_hash_start_idx = 2
-	/// The typepath we default to if we were passed no microwave result
-	var/atom/default_typepath
 	/// Resulting atom typepath on a completed microwave.
 	var/atom/result_typepath
 	/// Reagents that should be added to the result
 	var/list/added_reagents
+	/// Whether this is a bad recipe or not. It affects some checks.
+	var/bad_recipe
 
-/datum/element/microwavable/Attach(obj/item/target, microwave_type, list/reagents, skip_matcheck = FALSE)
+/datum/element/microwavable/Attach(obj/item/target, microwave_type, list/reagents, bad_recipe = FALSE)
 	. = ..()
 	if(!istype(target))
 		return ELEMENT_INCOMPATIBLE
+	if(!microwave_type)
+		CRASH("microwavable element attached without a microwave_type arg")
 
-	result_typepath = microwave_type || default_typepath
-
+	result_typepath = microwave_type
 	added_reagents = reagents
+	src.bad_recipe = bad_recipe
 
 	RegisterSignal(target, COMSIG_ITEM_MICROWAVE_ACT, PROC_REF(on_microwaved))
 
-	if(!ispath(result_typepath, default_typepath))
+	if(!bad_recipe)
 		RegisterSignal(target, COMSIG_ATOM_EXAMINE, PROC_REF(on_examine))
 
-	if(!PERFORM_ALL_TESTS(focus_only/check_materials_when_processed) || skip_matcheck || !target.custom_materials || isstack(target))
+	if(!PERFORM_ALL_TESTS(focus_only/check_materials_when_processed) || bad_recipe || !target.custom_materials || isstack(target))
 		return
 
 	var/atom/result = new result_typepath
@@ -55,12 +57,8 @@
 
 	var/efficiency = istype(used_microwave) ? used_microwave.efficiency : 1
 
-	if(IS_EDIBLE(result) && (result_typepath != default_typepath))
+	if(IS_EDIBLE(result) && !bad_recipe)
 		BLACKBOX_LOG_FOOD_MADE(result.type)
-		result.reagents.clear_reagents()
-		source.reagents?.trans_to(result, source.reagents.total_volume)
-		if(added_reagents) // Add any new reagents that should be added
-			result.reagents.add_reagent_list(added_reagents)
 
 		if(istype(source, /obj/item/food) && istype(result, /obj/item/food))
 			var/obj/item/food/original_food = source
@@ -70,6 +68,12 @@
 		if(microwaver && microwaver.mind)
 			ADD_TRAIT(result, TRAIT_FOOD_CHEF_MADE, REF(microwaver.mind))
 
+	//make space and tranfer reagents if it has any, also let any bad result handle removing or converting the transferred reagents on its own terms
+	if(result.reagents && source.reagents)
+		result.reagents.clear_reagents()
+		source.reagents.trans_to(result, source.reagents.total_volume)
+		if(added_reagents) // Add any new reagents that should be added
+			result.reagents.add_reagent_list(added_reagents)
 
 	SEND_SIGNAL(result, COMSIG_ITEM_MICROWAVE_COOKED, source, efficiency)
 	SEND_SIGNAL(source, COMSIG_ITEM_MICROWAVE_COOKED_FROM, result, efficiency)
@@ -77,7 +81,7 @@
 	qdel(source)
 
 	var/recipe_result = COMPONENT_MICROWAVE_SUCCESS
-	if(istype(result, default_typepath))
+	if(bad_recipe)
 		recipe_result |= COMPONENT_MICROWAVE_BAD_RECIPE
 
 	if(randomize_pixel_offset && isitem(result))