fix: patch react-native-track-player for Kotlin 2.x null safety

mobile/package.json

@@ -28,7 +28,11 @@
     "start": "expo start",
     "android": "expo start --android",
     "ios": "expo start --ios",
-    "web": "expo start --web"
+    "web": "expo start --web",
+    "postinstall": "patch-package"
   },
-  "private": true
+  "private": true,
+  "devDependencies": {
+    "patch-package": "^8.0.1"
+  }
 }