fix multi-child of absolute parent bug

modules/LayoutEngine.lua

@@ -123,8 +123,6 @@ end
 --- Apply CSS positioning offsets (top, right, bottom, left) to a child element
 ---@param child Element The element to apply offsets to
 function LayoutEngine:applyPositioningOffsets(child)
-
-  
   if not child then
     return
   end
@@ -209,13 +207,13 @@ function LayoutEngine:_batchCalculatePositions(children, startX, startY, spacing
     if isHorizontal then
       positions[i] = {
         x = currentPos + child.margin.left,
-        y = startY + child.margin.top
+        y = startY + child.margin.top,
       }
       currentPos = currentPos + child:getBorderBoxWidth() + child.margin.left + child.margin.right + spacing
     else
       positions[i] = {
         x = startX + child.margin.left,
-        y = currentPos + child.margin.top
+        y = currentPos + child.margin.top,
       }
       currentPos = currentPos + child:getBorderBoxHeight() + child.margin.top + child.margin.bottom + spacing
     end
@@ -226,7 +224,6 @@ end
 
 --- Layout children within this element according to positioning mode
 function LayoutEngine:layoutChildren()
-  
   -- Start performance timing first (before any early returns)
   local timerName = nil
   if LayoutEngine._Performance and LayoutEngine._Performance.enabled and self.element then
@@ -250,44 +247,6 @@ function LayoutEngine:layoutChildren()
   -- Track layout recalculations for performance warnings
   self:_trackLayoutRecalculation()
 
-  if self.positioning == self._Positioning.ABSOLUTE or self.positioning == self._Positioning.RELATIVE then
-    -- Absolute/Relative positioned containers don't layout their children according to flex rules,
-    -- but they should still apply CSS positioning offsets to their children
-    local baseX = (self.element.x or 0) + self.element.padding.left
-    local baseY = (self.element.y or 0) + self.element.padding.top
-    
-    for _, child in ipairs(self.element.children) do
-      -- Apply CSS positioning offsets to children with absolute positioning
-      if child.top or child.right or child.bottom or child.left then
-        self:applyPositioningOffsets(child)
-      elseif child.positioning == self._Positioning.RELATIVE then
-        -- Reposition relative children to match parent's new position
-        -- This is needed when the parent (absolute container) moves after children are created
-        -- Preserve any explicit x/y offsets that were set on the child
-        local offsetX = (child.units.x and child.units.x.value) or 0
-        local offsetY = (child.units.y and child.units.y.value) or 0
-        child.x = baseX + offsetX
-        child.y = baseY + offsetY
-        
-        -- If child has children, recursively layout them
-        if #child.children > 0 then
-          child:layoutChildren()
-        end
-      end
-    end
-
-    -- Detect overflow after children positioning
-    if self.element._detectOverflow then
-      self.element:_detectOverflow()
-    end
-
-    -- Stop performance timing
-    if timerName and LayoutEngine._Performance then
-      LayoutEngine._Performance:stopTimer(timerName)
-    end
-    return
-  end
-
   -- Handle grid layout
   if self.positioning == self._Positioning.GRID then
     self._Grid.layoutGridItems(self.element)
@@ -611,11 +570,7 @@ function LayoutEngine:layoutChildren()
         if effectiveAlign == alignItems_FLEX_START then
           child.y = elementY + elementPaddingTop + currentCrossPos + childMarginTop
         elseif effectiveAlign == alignItems_CENTER then
-          child.y = elementY
+          child.y = elementY + elementPaddingTop + currentCrossPos + ((lineHeight - childTotalCrossSize) / 2) + childMarginTop
-            + elementPaddingTop
-            + currentCrossPos
-            + ((lineHeight - childTotalCrossSize) / 2)
-            + childMarginTop
         elseif effectiveAlign == alignItems_FLEX_END then
           child.y = elementY + elementPaddingTop + currentCrossPos + lineHeight - childTotalCrossSize + childMarginTop
         elseif effectiveAlign == alignItems_STRETCH then
@@ -656,11 +611,7 @@ function LayoutEngine:layoutChildren()
         if effectiveAlign == alignItems_FLEX_START then
           child.x = elementX + elementPaddingLeft + currentCrossPos + childMarginLeft
         elseif effectiveAlign == alignItems_CENTER then
-          child.x = elementX
+          child.x = elementX + elementPaddingLeft + currentCrossPos + ((lineHeight - childTotalCrossSize) / 2) + childMarginLeft
-            + elementPaddingLeft
-            + currentCrossPos
-            + ((lineHeight - childTotalCrossSize) / 2)
-            + childMarginLeft
         elseif effectiveAlign == alignItems_FLEX_END then
           child.x = elementX + elementPaddingLeft + currentCrossPos + lineHeight - childTotalCrossSize + childMarginLeft
         elseif effectiveAlign == alignItems_STRETCH then