Add Class Resources and Debuff Highlighting modules; migrate settings to AceDB profiles

Move CoA settings from E.global/E.private into a proper AceDB-3.0 database
(CoA.db, SavedVariables ElvUI_CoADB) with a Profiles options tab, since
ElvUI doesn't ship AceDBOptions-3.0 (vendored under Libraries/).

Add ClassResources.lua: hooks the custom-class resource frames (segment
bar, orb, bar, multi-cast bar) into ElvUI's Toggle Anchors, with a
per-frame hide checkbox in a new "Class Resources" options tab.

Add DispelHighlight.lua: highlights dispellable debuffs on unitframes,
with talent-aware filtering for custom classes.

Fix mover/anchor reliability for Class Resources and the Instance
(LayerPicker) button:
- Movers were only retried until the target frame existed, not until the
  mover was actually created, so frames that start at zero size (e.g. a
  resource bar before that resource is ever active) permanently lost
  their mover.
- Class resource frames re-anchor themselves on refresh, stomping the
  mover's anchor; hook SetPoint to snap back to the mover holder whenever
  something else repositions the frame.
- Native click-drag on these frames ends with the engine calling SetPoint
  directly, severing the mover anchor entirely. Permanently block drag
  (script and RegisterForDrag) instead of clearing it once.

Modules/DispelHighlight.lua

@@ -0,0 +1,86 @@
+local E, L, V, P, G = unpack(ElvUI)
+local UF = E:GetModule("UnitFrames")
+local CoA = E:GetModule("CoA")
+
+-- Base dispel types each custom class can remove, independent of talents.
+-- CHRONOMANCER is a special case: its dispel removes the last debuff applied
+-- to the target regardless of type, so it's never filtered out here -- we
+-- can only approximate this as "treat every typed debuff as dispellable",
+-- since the underlying oUF scan only ever surfaces typed debuffs anyway.
+local CLASS_DISPEL_TYPES = {
+	CHRONOMANCER = true,
+	SUNCLERIC = {Magic = true, Poison = true, Disease = true},
+	STARCALLER = {Poison = true, Disease = true},
+	PROPHET = {Poison = true},
+	WITCHDOCTOR = {Curse = true},
+	CULTIST = {Magic = true},
+	PYROMANCER = {},
+}
+
+-- Extra dispel types unlocked by a talent choice. There's no reliable way to
+-- auto-detect the talent on this server, so these are gated by a manual
+-- checkbox in the options panel instead.
+local TALENT_DISPEL_TYPES = {
+	PROPHET = {flag = "hasBlightAntidote", types = {Curse = true}},
+	CULTIST = {flag = "hasDevourCurse", types = {Curse = true}},
+	PYROMANCER = {flag = "hasBurnImpurities", types = {Magic = true, Disease = true, Bleed = true}},
+}
+
+function CoA:CanDispel(debuffType)
+	local _, class = UnitClass("player")
+	local baseTypes = CLASS_DISPEL_TYPES[class]
+
+	if baseTypes == true then return true end
+	if baseTypes and baseTypes[debuffType] then return true end
+
+	local talent = TALENT_DISPEL_TYPES[class]
+	if talent and CoA.db.profile[talent.flag] and talent.types[debuffType] then return true end
+
+	return false
+end
+
+local function SuppressHighlight(object)
+	if object.DebuffHighlightBackdrop and object.DBHGlow then
+		object.DBHGlow:Hide()
+	elseif object.DebuffHighlightUseTexture then
+		object.DebuffHighlight:SetTexture(nil)
+	else
+		object.DebuffHighlight:SetVertexColor(0, 0, 0, 0)
+	end
+end
+
+local origPostUpdate = UF.PostUpdate_DebuffHighlight
+
+local function DispelAwarePostUpdate(dbh, object, debuffType, texture, wasFiltered, style, color)
+	origPostUpdate(dbh, object, debuffType, texture, wasFiltered, style, color)
+
+	if CoA.db.profile.dispelHighlightOnlyMine and debuffType and not wasFiltered and not CoA:CanDispel(debuffType) then
+		SuppressHighlight(object)
+	end
+end
+
+UF.PostUpdate_DebuffHighlight = DispelAwarePostUpdate
+
+hooksecurefunc(UF, "Configure_DebuffHighlight", function(_, frame)
+	local dbh = frame.DebuffHighlight
+	if dbh then
+		dbh.PostUpdate = UF.PostUpdate_DebuffHighlight
+	end
+end)
+
+function CoA:UpdateDispelHighlight()
+	UF:Update_AllFrames()
+end
+
+-- On Ascension, UnitClass("player")'s second return only reliably reports the
+-- real custom class (CULTIST, PYROMANCER, ...) a short while after login --
+-- immediately at ADDON_LOADED/PLAYER_LOGIN it can still read back the generic
+-- "HERO" base class. If a debuff highlight gets evaluated before that data
+-- syncs, CoA:CanDispel wrongly returns false and the highlight stays wrongly
+-- suppressed until the next aura change. Force one extra refresh shortly
+-- after entering the world so the very first debuff isn't judged too early.
+function CoA:InitializeDispelHighlight()
+	CoA:RegisterEvent("PLAYER_ENTERING_WORLD", function()
+		CoA:ScheduleTimer("UpdateDispelHighlight", 2)
+	end)
+end