fix: upgrade mobile_scanner to 7.4.0 for arm64 iOS-26 simulator support

ios/Podfile.lock

@@ -26,6 +26,9 @@ PODS:
   - local_auth_darwin (0.0.1):
     - Flutter
     - FlutterMacOS
+  - mobile_scanner (7.0.0):
+    - Flutter
+    - FlutterMacOS
   - no_screenshot (0.10.0):
     - Flutter
   - open_file_ios (1.0.3):
@@ -49,6 +52,7 @@ DEPENDENCIES:
   - flutter_secure_storage (from `.symlinks/plugins/flutter_secure_storage/ios`)
   - image_picker_ios (from `.symlinks/plugins/image_picker_ios/ios`)
   - local_auth_darwin (from `.symlinks/plugins/local_auth_darwin/darwin`)
+  - mobile_scanner (from `.symlinks/plugins/mobile_scanner/darwin`)
   - no_screenshot (from `.symlinks/plugins/no_screenshot/ios`)
   - open_file_ios (from `.symlinks/plugins/open_file_ios/ios`)
   - path_provider_foundation (from `.symlinks/plugins/path_provider_foundation/darwin`)
@@ -78,6 +82,8 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/image_picker_ios/ios"
   local_auth_darwin:
     :path: ".symlinks/plugins/local_auth_darwin/darwin"
+  mobile_scanner:
+    :path: ".symlinks/plugins/mobile_scanner/darwin"
   no_screenshot:
     :path: ".symlinks/plugins/no_screenshot/ios"
   open_file_ios:
@@ -99,6 +105,7 @@ SPEC CHECKSUMS:
   IdensicMobileSDK: a8ec2cf5c216ae138b00e2ff32e0e31c5e366cec
   image_picker_ios: e0ece4aa2a75771a7de3fa735d26d90817041326
   local_auth_darwin: c3ee6cce0a8d56be34c8ccb66ba31f7f180aaebb
+  mobile_scanner: 9157936403f5a0644ca3779a38ff8404c5434a93
   no_screenshot: 03c8ac6586f9652cd45e3d12d74e5992256403ac
   open_file_ios: 46184d802ee7959203f6392abcfa0dd49fdb5be0
   OrderedSet: e539b66b644ff081c73a262d24ad552a69be3a94

lib/screens/pay/pay_scan_page.dart

@@ -55,7 +55,7 @@ class PayScanView extends StatelessWidget {
           appBar: AppBar(title: Text(S.of(context).payScanTitle)),
           body: QrScannerView(
             onDetect: (raw) => context.read<PayScanCubit>().onCodeDetected(raw),
-            errorBuilder: (context, error, child) {
+            errorBuilder: (context, error) {
               final message = error.errorCode == MobileScannerErrorCode.permissionDenied
                   ? S.of(context).payScanCameraPermissionDenied
                   : S.of(context).payScanCameraUnavailable;

lib/widgets/scanner/qr_scanner_view.dart

@@ -4,8 +4,26 @@
 // pay flow (LNURL decode) and the wallet-to-wallet send flow (EVM address
 // decode); the per-flow decode logic it feeds is unit-tested in the respective
 // cubit tests.
-import 'package:flutter/widgets.dart';
+import 'package:flutter/material.dart';
 import 'package:mobile_scanner/mobile_scanner.dart';
+import 'package:realunit_wallet/styles/colors.dart';
+
+/// Compact icon-only error placeholder used when [QrScannerView.errorBuilder]
+/// is null. Replaces mobile_scanner 7.x's own (taller, textScale-scaling)
+/// default to avoid overflow in bounded layouts like send_recipient_page.dart's
+/// Expanded.
+Widget _defaultErrorBuilder(BuildContext context, MobileScannerException error) {
+  return ColoredBox(
+    color: RealUnitColors.basic.black,
+    child: Center(
+      child: Icon(
+        Icons.error_outline,
+        size: 48,
+        color: RealUnitColors.status.red600,
+      ),
+    ),
+  );
+}
 
 /// Thin wrapper around [MobileScanner] that surfaces the first raw barcode
 /// value of each capture via [onDetect]. Keeping the camera/MethodChannel
@@ -17,8 +35,10 @@ class QrScannerView extends StatelessWidget {
   final ValueChanged<String> onDetect;
 
   /// Optional error UI builder forwarded to [MobileScanner.errorBuilder].
-  /// When null, MobileScanner's own default error handling is used.
-  final Widget Function(BuildContext, MobileScannerException, Widget?)? errorBuilder;
+  /// When null, this compact icon-only placeholder is used instead of
+  /// mobile_scanner 7.x's own (taller, textScale-scaling) default, to avoid
+  /// overflow in bounded layouts like send_recipient_page.dart's Expanded.
+  final Widget Function(BuildContext, MobileScannerException)? errorBuilder;
 
   const QrScannerView({
     super.key,
@@ -33,7 +53,7 @@ class QrScannerView extends StatelessWidget {
         final raw = capture.barcodes.firstOrNull?.rawValue;
         if (raw != null) onDetect(raw);
       },
-      errorBuilder: errorBuilder,
+      errorBuilder: errorBuilder ?? _defaultErrorBuilder,
     );
   }
 }

pubspec.lock

@@ -78,7 +78,7 @@ packages:
     description:
       path: "."
       ref: "v0.0.10"
-      resolved-ref: "cd99ce656410e8df6c6585076d6ee0205a67b34c"
+      resolved-ref: cd99ce656410e8df6c6585076d6ee0205a67b34c
       url: "https://github.com/DFXswiss/bitbox_flutter.git"
     source: git
     version: "0.0.1"
@@ -955,10 +955,10 @@ packages:
     dependency: "direct main"
     description:
       name: mobile_scanner
-      sha256: d234581c090526676fd8fab4ada92f35c6746e3fb4f05a399665d75a399fb760
+      sha256: ce3f059ebd6dbfab7292bba0e893e354b46730636820d3c9ef69005ce2d55bce
       url: "https://pub.dev"
     source: hosted
-    version: "5.2.3"
+    version: "7.4.0"
   mocktail:
     dependency: "direct dev"
     description:

pubspec.yaml

@@ -65,7 +65,7 @@ dependencies:
   http: ^1.1.0
   intl: any
   local_auth: ^3.0.0
-  mobile_scanner: ^5.2.3
+  mobile_scanner: ^7.4.0
   no_screenshot: ^1.1.0
   open_file: ^3.5.11
   path: ^1.9.0

test/helper/golden_plugin_stubs.dart

@@ -68,4 +68,10 @@ void stubMobileScannerChannel() {
     const EventChannel('dev.steenbakker.mobile_scanner/scanner/event'),
     MockStreamHandler.inline(onListen: (arguments, sink) {}),
   );
+  // mobile_scanner 7.x additionally subscribes to a device-orientation event
+  // stream; stub it as a no-op so `listen`/`cancel` don't throw MissingPluginException.
+  messenger.setMockStreamHandler(
+    const EventChannel('dev.steenbakker.mobile_scanner/scanner/deviceOrientation'),
+    MockStreamHandler.inline(onListen: (arguments, sink) {}),
+  );
 }

test/screens/pay/pay_scan_page_test.dart

@@ -132,7 +132,6 @@ void main() {
         final errorWidget = scanner.errorBuilder!(
           context,
           MobileScannerException(errorCode: nonPermissionCode),
-          null,
         );
 
         await tester.pumpWidget(MaterialApp(home: errorWidget));

test/widgets/scanner/qr_scanner_view_test.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:realunit_wallet/widgets/scanner/qr_scanner_view.dart';
+
+import '../../helper/helper.dart';
+
+void main() {
+  setUpAll(stubMobileScannerChannel);
+
+  group('$QrScannerView default error placeholder', () {
+    testWidgets(
+      'renders the compact icon placeholder without overflow at high textScale in a tight box',
+      (tester) async {
+        await tester.pumpApp(
+          MediaQuery(
+            data: const MediaQueryData(size: Size(400, 800))
+                .copyWith(textScaler: const TextScaler.linear(3.0)),
+            child: Center(
+              child: SizedBox(
+                width: 60,
+                height: 60,
+                child: QrScannerView(onDetect: (_) {}),
+              ),
+            ),
+          ),
+        );
+
+        // Let the stubbed permission handshake resolve into the
+        // permission-denied error state so the default error builder paints.
+        await tester.pump();
+        await tester.pump(const Duration(milliseconds: 50));
+
+        expect(tester.takeException(), isNull);
+        expect(find.byIcon(Icons.error_outline), findsOneWidget);
+        final icon = tester.widget<Icon>(find.byIcon(Icons.error_outline));
+        expect(icon.size, 48);
+      },
+    );
+  });
+}