Colors: removed Colors.transparent / black and white in favor of their direct shorthands

Modules/MainScreen/Backgrounds/PanelBackground.qml

@@ -41,7 +41,7 @@ ShapePath {
   // Effective background color: use panel's if defined, else default
   readonly property color effectiveBackgroundColor: {
     if (!assignedPanel)
-      return Color.transparent;
+      return "transparent";
     if (assignedPanel.panelBackgroundColor !== undefined) {
       return assignedPanel.panelBackgroundColor;
     }

Modules/MainScreen/BarContentWindow.qml

@@ -18,7 +18,7 @@ PanelWindow {
   id: barWindow
 
   // Note: screen property is inherited from PanelWindow and should be set by parent
-  color: Color.transparent // Transparent - background is in MainScreen below
+  color: "transparent" // Transparent - background is in MainScreen below
 
   Component.onCompleted: {
     Logger.d("BarContentWindow", "Bar content window created for screen:", barWindow.screen?.name);

Modules/MainScreen/MainScreen.qml

@@ -81,7 +81,7 @@ PanelWindow {
     if (dimmerOpacity > 0 && isPanelOpen && !isPanelClosing) {
       return Qt.alpha(Color.mShadow, dimmerOpacity);
     }
-    return Color.transparent;
+    return "transparent";
   }
 
   Behavior on color {

Modules/MainScreen/PopupMenuWindow.qml

@@ -29,7 +29,7 @@ PanelWindow {
   anchors.right: true
   anchors.bottom: true
   visible: false
-  color: Color.transparent
+  color: "transparent"
 
   // Use Top layer (same as MainScreen) for proper event handling
   WlrLayershell.layer: WlrLayer.Top

Modules/MainScreen/ScreenCorners.qml

@@ -31,7 +31,7 @@ Item {
         id: cornersPath
 
         // Corner configuration
-        readonly property color cornerColor: Settings.data.general.forceBlackScreenCorners ? Color.black : Color.mSurface
+        readonly property color cornerColor: Settings.data.general.forceBlackScreenCorners ? "black" : Color.mSurface
         readonly property real cornerRadius: Style.screenRadius
         readonly property real cornerSize: Style.screenRadius
 
@@ -50,7 +50,7 @@ Item {
 
         // ShapePath configuration
         strokeWidth: -1 // No stroke, fill only
-        fillColor: shouldShow ? cornerColor : Color.transparent
+        fillColor: shouldShow ? cornerColor : "transparent"
 
         // Smooth color animation
         Behavior on fillColor {