Add breakpoint-responsive smoke tests and overflow fixes

docs/progress.md

@@ -27,6 +27,25 @@ Validation for this milestone:
 - `flutter analyze` -> pass
 - `flutter test` -> pass
 
+### Breakpoint QA follow-up
+
+Ran targeted responsive smoke checks for:
+
+- iPhone SE (`320x568`)
+- iPhone Pro Max (`430x932`)
+- iPad portrait (`768x1024`)
+- Web/desktop (`1280x800`)
+
+Follow-up fixes from QA:
+
+- `lib/features/auth/sign_in_view.dart`
+  - added scroll-safe container for short-height screens to prevent vertical overflow
+- `lib/features/home/app_shell.dart`
+  - made sidebar brand text ellipsize-safe to prevent horizontal overflow
+- Added automated responsive regression suite:
+  - `test/features/responsive/responsive_views_smoke_test.dart`
+  - validates `AppShell` + all primary views across the breakpoints above
+
 ## Latest Milestone (2026-02-15): People Mobile Layout Fix
 
 Fixed the `People` view so it is mobile-friendly and no longer overflows on iOS narrow screens:

lib/features/auth/sign_in_view.dart

@@ -39,11 +39,15 @@ class _SignInViewState extends ConsumerState<SignInView> {
     final bool busy = session.isLoading;
     final Object? error = session.asError?.error;
 
-    return Center(
+    return LayoutBuilder(
+      builder: (BuildContext context, BoxConstraints viewport) {
+        return SingleChildScrollView(
+          padding: const EdgeInsets.all(16),
+          child: ConstrainedBox(
+            constraints: BoxConstraints(minHeight: viewport.maxHeight - 32),
+            child: Center(
               child: ConstrainedBox(
                 constraints: const BoxConstraints(maxWidth: 620),
-        child: Padding(
-          padding: const EdgeInsets.all(24),
                 child: FrostedCard(
                   child: LayoutBuilder(
                     builder: (BuildContext context, BoxConstraints constraints) {
@@ -59,9 +63,8 @@ class _SignInViewState extends ConsumerState<SignInView> {
                           const SizedBox(height: 8),
                           Text(
                             'Your local data remains available offline. Backend unlocks sync and signals.',
-                      style: Theme.of(context).textTheme.bodyLarge?.copyWith(
-                        color: AppTheme.textSecondary,
-                      ),
+                            style: Theme.of(context).textTheme.bodyLarge
+                                ?.copyWith(color: AppTheme.textSecondary),
                           ),
                           const SizedBox(height: 18),
                           if (compact)
@@ -86,7 +89,9 @@ class _SignInViewState extends ConsumerState<SignInView> {
                                         _method = value;
                                       });
                                     },
-                        decoration: const InputDecoration(labelText: 'Method'),
+                              decoration: const InputDecoration(
+                                labelText: 'Method',
+                              ),
                             )
                           else
                             SegmentedButton<SignInMethod>(
@@ -120,7 +125,9 @@ class _SignInViewState extends ConsumerState<SignInView> {
                               controller: _emailController,
                               keyboardType: TextInputType.emailAddress,
                               enabled: !busy,
-                        decoration: const InputDecoration(labelText: 'Email'),
+                              decoration: const InputDecoration(
+                                labelText: 'Email',
+                              ),
                             ),
                           if (_method == SignInMethod.password)
                             TextField(
@@ -184,6 +191,9 @@ class _SignInViewState extends ConsumerState<SignInView> {
                 ),
               ),
             ),
+          ),
+        );
+      },
     );
   }
 

lib/features/home/app_shell.dart

@@ -199,9 +199,12 @@ class _Sidebar extends StatelessWidget {
                 ),
               ),
               const SizedBox(width: 10),
-              Text(
+              Expanded(
+                child: Text(
                   'Relationship Saver',
                   style: Theme.of(context).textTheme.titleMedium,
+                  overflow: TextOverflow.ellipsis,
+                ),
               ),
             ],
           ),

test/features/responsive/responsive_views_smoke_test.dart

@@ -0,0 +1,122 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:relationship_saver/core/auth/in_memory_token_store.dart';
+import 'package:relationship_saver/core/config/app_theme.dart';
+import 'package:relationship_saver/features/auth/sign_in_view.dart';
+import 'package:relationship_saver/features/dashboard/dashboard_view.dart';
+import 'package:relationship_saver/features/home/app_shell.dart';
+import 'package:relationship_saver/features/ideas/ideas_view.dart';
+import 'package:relationship_saver/features/moments/moments_view.dart';
+import 'package:relationship_saver/features/people/people_view.dart';
+import 'package:relationship_saver/features/reminders/reminders_view.dart';
+import 'package:relationship_saver/features/settings/settings_view.dart';
+import 'package:relationship_saver/features/signals/signals_view.dart';
+import 'package:relationship_saver/features/sync/sync_view.dart';
+import 'package:relationship_saver/integrations/backend/backend_gateway_fake.dart';
+import 'package:relationship_saver/integrations/backend/backend_gateway_provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  final List<Breakpoint> breakpoints = <Breakpoint>[
+    const Breakpoint('iphone-se', Size(320, 568)),
+    const Breakpoint('iphone-pro-max', Size(430, 932)),
+    const Breakpoint('ipad-portrait', Size(768, 1024)),
+    const Breakpoint('web-desktop', Size(1280, 800)),
+  ];
+
+  setUp(() {
+    SharedPreferences.setMockInitialValues(<String, Object>{});
+  });
+
+  for (final Breakpoint breakpoint in breakpoints) {
+    testWidgets('AppShell renders across breakpoint: ${breakpoint.name}', (
+      WidgetTester tester,
+    ) async {
+      await pumpResponsive(
+        tester,
+        size: breakpoint.size,
+        child: const AppShell(),
+        wrapInScaffold: false,
+      );
+
+      expect(find.byType(AppShell), findsOneWidget);
+      assertNoFlutterExceptions(
+        tester,
+        context:
+            'AppShell at ${breakpoint.name} (${breakpoint.size.width}x${breakpoint.size.height})',
+      );
+    });
+
+    testWidgets(
+      'All primary views render across breakpoint: ${breakpoint.name}',
+      (WidgetTester tester) async {
+        final List<Widget> views = <Widget>[
+          const SignInView(),
+          const DashboardView(),
+          const PeopleView(),
+          const MomentsView(),
+          const IdeasView(),
+          const RemindersView(),
+          const SignalsView(),
+          const SyncView(),
+          const SettingsView(),
+        ];
+
+        for (final Widget view in views) {
+          await pumpResponsive(tester, size: breakpoint.size, child: view);
+          assertNoFlutterExceptions(
+            tester,
+            context:
+                '${view.runtimeType} at ${breakpoint.name} (${breakpoint.size.width}x${breakpoint.size.height})',
+          );
+        }
+      },
+    );
+  }
+}
+
+class Breakpoint {
+  const Breakpoint(this.name, this.size);
+
+  final String name;
+  final Size size;
+}
+
+Future<void> pumpResponsive(
+  WidgetTester tester, {
+  required Size size,
+  required Widget child,
+  bool wrapInScaffold = true,
+}) async {
+  await tester.binding.setSurfaceSize(size);
+  addTearDown(() => tester.binding.setSurfaceSize(null));
+
+  final Widget home = wrapInScaffold ? Scaffold(body: child) : child;
+
+  await tester.pumpWidget(
+    ProviderScope(
+      overrides: [
+        tokenStoreProvider.overrideWithValue(InMemoryTokenStore()),
+        backendGatewayProvider.overrideWithValue(BackendGatewayFake()),
+      ],
+      child: MaterialApp(theme: AppTheme.light(), home: home),
+    ),
+  );
+
+  await tester.pumpAndSettle(const Duration(milliseconds: 300));
+}
+
+void assertNoFlutterExceptions(WidgetTester tester, {required String context}) {
+  Object? error;
+  final List<Object> errors = <Object>[];
+  while ((error = tester.takeException()) != null) {
+    errors.add(error!);
+  }
+
+  expect(
+    errors,
+    isEmpty,
+    reason: 'Found Flutter exceptions for $context: $errors',
+  );
+}