coa: fix CoA dispel detection timing in SUF aura scan

Previous approach baked playerCoaDispels into group.coaRaidFilter during
OnLayoutApplied, which can fire before PLAYER_LOGIN when C_Player isn't
ready yet — Venomancer and other CoA classes got cached as false and
never re-evaluated.

Fix: move all CoA logic into scan() itself so it runs on every
PLAYER_ENTERING_WORLD update. getCoaDispels() no longer caches when
C_Player is unavailable (returns nil without storing), so the first
successful in-world call populates it correctly.

updateGroup() is restored to its original form — no group.coaRaidFilter.
scan() intercepts filter=="HARMFUL|RAID", calls getCoaDispels(), and if
a dispel set is found strips |RAID and applies the per-type check inline.

ShadowedUnitFrames/modules/auras.lua

@@ -21,7 +21,12 @@ local COA_CLASS_DISPELS = {
 local function getCoaDispels()
 	if playerCoaDispels ~= nil then return playerCoaDispels end
 	local cp = _G.C_Player
-	if cp and cp.IsCustomClass and cp:IsCustomClass() then
+	if not cp or not cp.IsCustomClass then
+		-- C_Player not yet initialised (called before PLAYER_LOGIN); don't
+		-- cache — retry on the next scan so we pick it up once in-world.
+		return nil
+	end
+	if cp:IsCustomClass() then
 		local _, token = UnitClass("player")
 		playerCoaDispels = token and COA_CLASS_DISPELS[token] or false
 	else
@@ -337,17 +342,7 @@ local function updateGroup(self, type, config, reverseConfig)
 	-- This is a bit of an odd filter, when used with a HELPFUL filter, it will only return buffs you can cast on group members
 	-- When used with HARMFUL it will only return debuffs you can cure
 	if( config.raid ) then
-		local coa = group.type == "debuffs" and getCoaDispels()
-		if coa then
-			-- CoA custom class: keep filter as plain "HARMFUL" and let scan()
-			-- apply the per-type check via group.coaRaidFilter.
-			group.coaRaidFilter = coa
-		else
 		group.filter = group.filter .. "|RAID"
-			group.coaRaidFilter = nil
-		end
-	else
-		group.coaRaidFilter = nil
 	end
 	
 	for id, button in pairs(group.buttons) do
@@ -517,6 +512,13 @@ end
 local function scan(parent, frame, type, config, filter)
 	if( frame.totalAuras >= frame.maxAuras or not config.enabled ) then return end
 
+	-- CoA: |RAID is not honoured for custom classes; override with manual type check.
+	local coaFilter
+	if filter == "HARMFUL|RAID" then
+		coaFilter = getCoaDispels()
+		if coaFilter then filter = "HARMFUL" end
+	end
+
 	local isFriendly = UnitIsFriend(frame.parent.unit, "player")
 	local index = 0
 	while( true ) do
@@ -524,7 +526,7 @@ local function scan(parent, frame, type, config, filter)
 		local name, rank, texture, count, auraType, duration, endTime, caster, isStealable = UnitAura(frame.parent.unit, index, filter)
 		if( not name ) then break end
 		
-		if( ( not frame.coaRaidFilter or (auraType and frame.coaRaidFilter[auraType]) ) and ( not config.player or playerUnits[caster] ) and ( not parent.whitelist[type] and not parent.blacklist[type] or parent.whitelist[type] and parent.whitelist[name] or parent.blacklist[type] and not parent.blacklist[name] ) ) then
+		if( ( not coaFilter or (auraType and coaFilter[auraType]) ) and ( not config.player or playerUnits[caster] ) and ( not parent.whitelist[type] and not parent.blacklist[type] or parent.whitelist[type] and parent.whitelist[name] or parent.blacklist[type] and not parent.blacklist[name] ) ) then
 			-- Create any buttons we need
 			frame.totalAuras = frame.totalAuras + 1
 			if( #(frame.buttons) < frame.totalAuras ) then