fix: defer tracked bar refreshes while moving

UI/TrackedItemBarMoveSafety.lua

@@ -0,0 +1,69 @@
+-- Guda Tracked Item Bar movement safety
+-- Prevents structural Tracked Item Bar refreshes while the frame is being dragged.
+-- Lua 5.0 compatible.
+
+local addon = Guda
+if not addon or not addon.Modules or not addon.Modules.TrackedItemBar then return end
+
+local TrackedItemBar = addon.Modules.TrackedItemBar
+if not TrackedItemBar.Update then return end
+
+local OriginalUpdate = TrackedItemBar.Update
+
+local function FlushDeferredUpdate(barFrame)
+    if not barFrame or barFrame.isMoving then return end
+    if not barFrame._gudaTrackedBarDeferredUpdate then return end
+
+    barFrame._gudaTrackedBarDeferredUpdate = nil
+    TrackedItemBar:Update()
+end
+
+local function WrapMouseUp(frame, barFrame)
+    if not frame or frame._gudaTrackedBarMoveSafetyWrapped then return end
+
+    local originalMouseUp = frame:GetScript("OnMouseUp")
+    frame._gudaTrackedBarMoveSafetyWrapped = true
+
+    frame:SetScript("OnMouseUp", function()
+        if originalMouseUp then
+            originalMouseUp()
+        end
+
+        FlushDeferredUpdate(barFrame or Guda_TrackedItemBar)
+    end)
+end
+
+local function EnsureMoveSafetyHooks()
+    local barFrame = Guda_TrackedItemBar
+    if not barFrame then return end
+
+    -- The bar itself can be dragged from its empty area.
+    WrapMouseUp(barFrame, barFrame)
+
+    -- Tracked-item buttons can also start/stop movement on behalf of the bar.
+    -- Buttons are created dynamically, so wrap every currently existing one.
+    local i = 1
+    while true do
+        local button = getglobal("Guda_TrackedItemBarButton" .. i)
+        if not button then break end
+        WrapMouseUp(button, barFrame)
+        i = i + 1
+    end
+end
+
+function TrackedItemBar:Update()
+    local barFrame = Guda_TrackedItemBar
+
+    -- BAG_UPDATE, PLAYER_LEVEL_UP and other refreshes can arrive while
+    -- StartMoving() is active. Rebuilding/hiding/resizing the frame in that
+    -- state is unsafe on 1.12, so coalesce them into one post-drag refresh.
+    if barFrame and barFrame.isMoving then
+        barFrame._gudaTrackedBarDeferredUpdate = true
+        return
+    end
+
+    OriginalUpdate(self)
+    EnsureMoveSafetyHooks()
+end
+
+addon:Debug("TrackedItemBar movement safety enabled")