fix: Keyboard disappears in lockscreen

lib/widgets/app_lock.dart

@@ -103,11 +103,6 @@ class AppLock extends State<AppLockWidget> with WidgetsBindingObserver {
   @override
   Widget build(BuildContext context) => Provider<AppLock>(
         create: (_) => this,
-        child: Stack(
+        child: isLocked ? const LockScreen() : widget.child,
-          children: [
-            widget.child,
-            if (isLocked) const LockScreen(),
-          ],
-        ),
       );
 }

lib/widgets/lock_screen.dart

@@ -4,10 +4,8 @@ import 'package:flutter/material.dart';
 
 import 'package:flutter_gen/gen_l10n/l10n.dart';
 
-import 'package:fluffychat/config/app_config.dart';
 import 'package:fluffychat/config/themes.dart';
 import 'package:fluffychat/widgets/app_lock.dart';
-import 'package:fluffychat/widgets/theme_builder.dart';
 
 class LockScreen extends StatefulWidget {
   const LockScreen({super.key});
@@ -62,17 +60,7 @@ class _LockScreenState extends State<LockScreen> {
 
   @override
   Widget build(BuildContext context) {
-    return ThemeBuilder(
+    return Scaffold(
-      builder: (context, themeMode, primaryColor) => MaterialApp(
-        title: AppConfig.applicationName,
-        themeMode: themeMode,
-        theme: FluffyThemes.buildTheme(context, Brightness.light, primaryColor),
-        darkTheme:
-            FluffyThemes.buildTheme(context, Brightness.dark, primaryColor),
-        localizationsDelegates: L10n.localizationsDelegates,
-        supportedLocales: L10n.supportedLocales,
-        home: Builder(
-          builder: (context) => Scaffold(
       appBar: AppBar(
         title: Text(L10n.of(context)!.pleaseEnterYourPin),
         centerTitle: true,
@@ -120,9 +108,6 @@ class _LockScreenState extends State<LockScreen> {
           ),
         ),
       ),
-          ),
-        ),
-      ),
     );
   }
 }