Add newitem module: highlight freshly-acquired bag items

New module built on ClassicAPI's C_NewItems + BAG_NEW_ITEMS_UPDATED.
Glows bag slots (bags 0-4) holding items acquired since login, keyed on
item GUID so the flag survives rearranging. Hovering an item
acknowledges it (RemoveNewItem); closing the bags clears the rest via
ClearAll. Glow is UI-ActionButton-Border, sized off the slot width so it
tracks the icon_size config.

To stay decoupled from the bag frames, the bag module now broadcasts a
reusable "bag:closed" event through pfUI.events from its OnHide (carrying
the container so subscribers can tell backpack from bank), guarded so the
initial setup Hide() doesn't fire a phantom close.

Config: appearance.bags.newitem + newitem_color, with GUI toggles.

api/config.lua

@@ -162,6 +162,8 @@ function pfUI:LoadConfig()
   pfUI:UpdateConfig("appearance", "infight",     "intensity",           "16")
   pfUI:UpdateConfig("appearance", "bags",        "unusable",         "1")
   pfUI:UpdateConfig("appearance", "bags",        "unusable_color",   ".9,.2,.2,1")
+  pfUI:UpdateConfig("appearance", "bags",        "newitem",          "1")
+  pfUI:UpdateConfig("appearance", "bags",        "newitem_color",    "1,1,1,1")
   pfUI:UpdateConfig("appearance", "bags",        "borderlimit",      "1")
   pfUI:UpdateConfig("appearance", "bags",        "borderonlygear",   "0")
   pfUI:UpdateConfig("appearance", "bags",        "fulltext",         "1")

env/translations_enUS.lua

@@ -411,6 +411,7 @@ pfUI_translation["enUS"] = {
   ["Highlight Equipped Items"] = nil,
   ["Highlight Not Usable Spells"] = nil,
   ["Highlight Out Of Mana Spells"] = nil,
+  ["Highlight New Items"] = nil,
   ["Highlight Out Of Range Spells"] = nil,
   ["Highlight Settings That Require Reload"] = nil,
   ["Highlight Unusable Items"] = nil,
@@ -529,6 +530,7 @@ pfUI_translation["enUS"] = {
   ["Network Latency"] = nil,
   ["Network Up"] = nil,
   ["New entry:"] = nil,
+  ["New Item Color"] = nil,
   ["NEW TIMER"] = nil,
   ["Next"] = nil,
   ["Next Memory Cleanup"] = nil,

init/modules.xml

@@ -79,4 +79,5 @@
   <Include file="..\modules\bgscore.lua"/>
   <Include file="..\modules\equipmentmanager.lua"/>
   <Include file="..\modules\loothistory.lua"/>
+  <Include file="..\modules\newitem.lua"/>
 </Ui>

modules/bags.lua

@@ -337,6 +337,7 @@ pfUI:RegisterModule("bags", function ()
     local chat = pfUI.chat and ( object == "bank" and pfUI.chat.left or pfUI.chat.right) or nil
 
     frame:SetScript("OnShow", function()
+      frame.opened = true
       if C.appearance.bags.hidechat == "1" and chat and chat:IsVisible() then
         frame.chatWasOpen = true
         chat:Hide()
@@ -355,6 +356,10 @@ pfUI:RegisterModule("bags", function ()
       end
       pfUI.bag:CreateBags(object)
       PlaySound("INTERFACESOUND_BACKPACKCLOSE")
+      if frame.opened then
+        frame.opened = nil
+        pfUI.events:TriggerEvent("bag:closed", object)
+      end
     end)
   end
 

modules/gui.lua

@@ -2413,6 +2413,8 @@ pfUI:RegisterModule("gui", function ()
       CreateConfig(nil, T["Enable Item Quality Color For Equipment Only"], C.appearance.bags, "borderonlygear", "checkbox")
       CreateConfig(nil, T["Highlight Unusable Items"], C.appearance.bags, "unusable", "checkbox")
       CreateConfig(nil, T["Unusable Item Color"], C.appearance.bags, "unusable_color", "color")
+      CreateConfig(nil, T["Highlight New Items"], C.appearance.bags, "newitem", "checkbox")
+      CreateConfig(nil, T["New Item Color"], C.appearance.bags, "newitem_color", "color")
       CreateConfig(nil, T["Enable Movable Bags"], C.appearance.bags, "movable", "checkbox")
       CreateConfig(nil, T["Anchor Bags Above Chat"], C.appearance.bags, "abovechat", "checkbox")
       CreateConfig(nil, T["Hide Chat When Bags Are Opened"], C.appearance.bags, "hidechat", "checkbox")

modules/newitem.lua

@@ -0,0 +1,63 @@
+pfUI:RegisterModule("newitem", function ()
+  if not pfUI.bag then return end
+  if C.appearance.bags.newitem ~= "1" then return end
+
+  pfUI.newitem = {}
+
+  local color = CreateColor(strsplit(",", C.appearance.bags.newitem_color))
+
+  function pfUI.newitem:UpdateSlot(bag, slot)
+    if bag < 0 or bag > 4 then return end
+    if not pfUI.bags[bag] then return end
+    if not pfUI.bags[bag].slots[slot] then return end
+
+    local frame = pfUI.bags[bag].slots[slot].frame
+
+    if not frame.newitem then
+      local glow = frame:CreateTexture(nil, "OVERLAY")
+      glow:SetTexture("Interface\\Buttons\\UI-ActionButton-Border")
+      glow:SetBlendMode("ADD")
+      glow:SetVertexColor(color:GetRGBA())
+      glow:SetPoint("CENTER", frame, "CENTER")
+      glow:Hide()
+      frame.newitem = glow
+
+      frame:HookScript("OnEnter", function()
+        C_NewItems.RemoveNewItem(bag, slot)
+      end)
+    end
+
+    local w = frame:GetWidth()
+    if w > 0 then frame.newitem:SetSize(w * 1.8, w * 1.8) end
+
+    frame.newitem:SetShown(frame.hasItem and C_NewItems.IsNewItem(bag, slot))
+  end
+
+  -- The new-item set can change without any slot's contents changing (an item
+  -- acknowledged, pruned when it leaves the bags, or ClearAll) -- re-evaluate
+  -- every decorated slot when that happens.
+  function pfUI.newitem:RefreshAll()
+    for bag in pairs(pfUI.bags) do
+      local slots = pfUI.bags[bag] and pfUI.bags[bag].slots
+      if slots then
+        for slot in pairs(slots) do
+          pfUI.newitem:UpdateSlot(bag, slot)
+        end
+      end
+    end
+  end
+
+  -- per-slot: pfUI re-runs UpdateSlot whenever a slot's contents change.
+  hooksecurefunc(pfUI.bag, "UpdateSlot", function(self, bag, slot)
+    pfUI.newitem:UpdateSlot(bag, slot)
+  end)
+
+  EventRegistry:RegisterFrameEventAndCallback("BAG_NEW_ITEMS_UPDATED", function()
+    pfUI.newitem:RefreshAll()
+  end)
+
+  pfUI.events:RegisterCallback("bag:closed", function(_, object)
+    if object then return end
+    C_NewItems.ClearAll()
+  end, "newitem")
+end)

pfUI.lua

@@ -23,7 +23,7 @@ do
   -- ClassicAPI dependency check.
   -- pfUI relies pervasively on the modern C_* / SuperWoW / nameplate / focus
   -- API surface that ClassicAPI polyfills, so presence is required.
-  local PFUI_CLASSIC_API_MIN     = 10605  -- (X*10000 + Y*100 + Z)
+  local PFUI_CLASSIC_API_MIN     = 10700  -- (X*10000 + Y*100 + Z)
   local PFUI_CLASSIC_API_LATEST  = PFUI_CLASSIC_API_MIN
   local PFUI_CLASSIC_API_WEBSITE = "https://github.com/brues-code/ClassicAPI"
   local PFUI_CLASSIC_API_LATEST_URL = PFUI_CLASSIC_API_WEBSITE .. "/releases/latest"