Bar/Panels: Unified transparency for panels and bar!

Commons/Migrations/Migration29.qml

@@ -0,0 +1,19 @@
+import QtQuick
+
+QtObject {
+  id: root
+
+  // Migrate bar.backgroundOpacity to ui.panelBackgroundOpacity
+  function migrate(adapter, logger, rawJson) {
+    logger.i("Settings", "Migrating settings to v29");
+
+    // Check rawJson for old property (adapter doesn't expose removed properties)
+    if (rawJson?.bar?.backgroundOpacity !== undefined) {
+      adapter.ui.panelBackgroundOpacity = Math.max(0.4, rawJson.bar.backgroundOpacity);
+      adapter.bar.transparent = (rawJson.bar.backgroundOpacity < 0.1);
+      logger.i("Settings", "Migrated bar.backgroundOpacity to ui.panelBackgroundOpacity: " + adapter.ui.panelBackgroundOpacity);
+    }
+
+    return true;
+  }
+}

Commons/Migrations/MigrationRegistry.qml

@@ -8,10 +8,12 @@ QtObject {
   // Map of version number to migration component
   readonly property var migrations: ({
                                        27: migration27Component,
-                                       28: migration28Component
+                                       28: migration28Component,
+                                       29: migration29Component
                                      })
 
   // Migration components
   property Component migration27Component: Migration27 {}
   property Component migration28Component: Migration28 {}
+  property Component migration29Component: Migration29 {}
 }