fix: alot

lib/app/app_lifecycle_lock.dart

@@ -1,28 +1,44 @@
 import 'package:flutter/material.dart';
 
+/// Locks once the app returns after being in the background for at least
+/// [gracePeriod], so a quick trip to the image picker or installer doesn't.
 class AppLifecycleLockObserver extends WidgetsBindingObserver {
   final VoidCallback onLock;
   final VoidCallback? onBackground;
   final VoidCallback? onForeground;
   final bool Function()? shouldLock;
+  final Duration gracePeriod;
+  final DateTime Function() _clock;
+
+  DateTime? _backgroundedAt;
 
   AppLifecycleLockObserver({
     required this.onLock,
     this.onBackground,
     this.onForeground,
     this.shouldLock,
-  });
+    this.gracePeriod = const Duration(seconds: 30),
+    DateTime Function()? clock,
+  }) : _clock = clock ?? DateTime.now;
 
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
     switch (state) {
       case AppLifecycleState.inactive:
+        break;
       case AppLifecycleState.hidden:
       case AppLifecycleState.paused:
       case AppLifecycleState.detached:
-        if (shouldLock?.call() ?? true) onLock();
+        if (_backgroundedAt != null) return;
+        _backgroundedAt = _clock();
         onBackground?.call();
       case AppLifecycleState.resumed:
+        final backgroundedAt = _backgroundedAt;
+        if (backgroundedAt == null) return;
+        _backgroundedAt = null;
+
+        final away = _clock().difference(backgroundedAt);
+        if (away >= gracePeriod && (shouldLock?.call() ?? true)) onLock();
         onForeground?.call();
     }
   }