feat(ground-suite): add replay observability console

ground-suite/test/widget_test.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ground_suite/app/app.dart';
+
+void main() {
+  testWidgets('replay workspace keeps diagnostics distinct and read-only', (
+    tester,
+  ) async {
+    await tester.pumpWidget(const ProviderScope(child: GroundSuiteApp()));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Observation only'), findsOneWidget);
+    expect(find.text('Replay fixture'), findsAtLeastNWidgets(1));
+    expect(find.text('Vehicle identity'), findsOneWidget);
+
+    await tester.tap(find.byIcon(Icons.receipt_long_outlined));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Diagnostics'), findsAtLeastNWidgets(1));
+    expect(
+      find.text('kaptan_drivers::lidar_lite_v3::error::Error::TransferFault'),
+      findsOneWidget,
+    );
+
+    await tester.tap(find.text('Shutdowns'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Orderly shutdown observed'), findsOneWidget);
+  });
+
+  testWidgets(
+    'compact desktop layout uses bottom navigation without overflow',
+    (tester) async {
+      await tester.binding.setSurfaceSize(const Size(480, 800));
+      addTearDown(() => tester.binding.setSurfaceSize(null));
+
+      await tester.pumpWidget(const ProviderScope(child: GroundSuiteApp()));
+      await tester.pumpAndSettle();
+
+      expect(find.byType(NavigationBar), findsOneWidget);
+      expect(tester.takeException(), isNull);
+    },
+  );
+}