settings: added migration49 to delete the old 'launcher_app_usage.json' file

Commons/Migrations/Migration49.qml

@@ -0,0 +1,17 @@
+import QtQuick
+import Quickshell
+import qs.Commons
+
+QtObject {
+  id: root
+
+  // Remove old launcher_app_usage.json (usage tracking moved to ShellState)
+  function migrate(adapter, logger, rawJson) {
+    logger.i("Settings", "Migrating settings to v49");
+
+    Quickshell.execDetached(["rm", "-f", Settings.cacheDir + "launcher_app_usage.json"]);
+    logger.i("Settings", "Removed old launcher_app_usage.json");
+
+    return true;
+  }
+}

Commons/Migrations/MigrationRegistry.qml

@@ -22,7 +22,8 @@ QtObject {
                                        45: migration45Component,
                                        46: migration46Component,
                                        47: migration47Component,
-                                       48: migration48Component
+                                       48: migration48Component,
+                                       49: migration49Component
                                      })
 
   // Migration components
@@ -42,4 +43,5 @@ QtObject {
   property Component migration46Component: Migration46 {}
   property Component migration47Component: Migration47 {}
   property Component migration48Component: Migration48 {}
+  property Component migration49Component: Migration49 {}
 }