fix: improved performance on bag->bank and bank->bag

UI/BagFrame.lua

@@ -191,7 +191,7 @@ function BagFrame:UpdateSingleSlot(bagID, slotID)
     -- Find the button for this slot in itemButtons
     local targetButton = nil
     for _, button in ipairs(itemButtons) do
-        if button.bagID == bagID and button.slot == slotID then
+        if button.bagID == bagID and button.slotID == slotID then
             targetButton = button
             break
         end
@@ -248,7 +248,7 @@ function BagFrame:UpdateChangedSlots(bagID)
         -- Find button for this slot
         local targetButton = nil
         for _, button in ipairs(itemButtons) do
-            if button.bagID == bagID and button.slot == slotID then
+            if button.bagID == bagID and button.slotID == slotID then
                 targetButton = button
                 break
             end

UI/BankFrame.lua

@@ -141,7 +141,7 @@ function BankFrame:UpdateSingleSlot(bagID, slotID)
 
     local targetButton = nil
     for button in pairs(bankBagParent.itemButtons) do
-        if button.bagID == bagID and button.slot == slotID then
+        if button.bagID == bagID and button.slotID == slotID then
             targetButton = button
             break
         end

UI/ItemButton.lua

@@ -355,8 +355,7 @@ function Guda_ItemButton_OnLoad(self)
         self.questIcon = iconFrame
     end
 
-    -- Create junk icon overlay (vendor sell icon in top-left corner)
-    CreateJunkIcon(self)
+    -- Note: Junk icon is acquired from pool on-demand in UpdateJunkIcon, not pre-created
 
     -- Ensure the item button sits above its container backdrop and is mouse-enabled
     local parent = self:GetParent()