launcher: fixed gridview keyboard navigation to properly account for the provider defined number of columns.

Modules/Panels/Launcher/Launcher.qml

@@ -179,9 +179,8 @@ SmartPanel {
   readonly property int gridContentWidth: listPanelWidth - (2 * Style.marginXS)
   readonly property int gridCellSize: Math.floor((gridContentWidth - ((targetGridColumns - 1) * Style.marginS)) / targetGridColumns)
 
-  // Actual columns that fit in the GridView
-  // This gets updated dynamically by the GridView when its actual width is known
-  property int gridColumns: 5
+  // Actual columns in the GridView - tracks targetGridColumns
+  readonly property int gridColumns: targetGridColumns
 
   // Listen for plugin provider registry changes
   Connections {
@@ -1375,20 +1374,6 @@ SmartPanel {
             focus: false
             interactive: !Settings.data.appLauncher.ignoreMouseInput
 
-            Component.onCompleted: {
-              // Initialize gridColumns when grid view is created
-              updateGridColumns();
-            }
-
-            function updateGridColumns() {
-              // Since cellWidth = width / targetGridColumns, the number of columns is always targetGridColumns
-              root.gridColumns = root.targetGridColumns;
-            }
-
-            onWidthChanged: {
-              updateGridColumns();
-            }
-
             // Completely disable GridView key handling
             Keys.enabled: false