feat: add remote pull and push

lib/app/app_lifecycle_lock.dart

@@ -2,9 +2,16 @@ import 'package:flutter/material.dart';
 
 class AppLifecycleLockObserver extends WidgetsBindingObserver {
   final VoidCallback onLock;
+  final VoidCallback? onBackground;
+  final VoidCallback? onForeground;
   final bool Function()? shouldLock;
 
-  AppLifecycleLockObserver({required this.onLock, this.shouldLock});
+  AppLifecycleLockObserver({
+    required this.onLock,
+    this.onBackground,
+    this.onForeground,
+    this.shouldLock,
+  });
 
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
@@ -14,8 +21,9 @@ class AppLifecycleLockObserver extends WidgetsBindingObserver {
       case AppLifecycleState.paused:
       case AppLifecycleState.detached:
         if (shouldLock?.call() ?? true) onLock();
+        onBackground?.call();
       case AppLifecycleState.resumed:
-        break;
+        onForeground?.call();
     }
   }
 }