feat(ui): complete M1 Milestone - read-only Dashboard and Detail Pane with status.sh integration

.agents/skills/multi-agent-mux-ui/apps/mam_desktop/test/widget_test.dart

@@ -1,30 +1,74 @@
-// This is a basic Flutter widget test.
-//
-// To perform an interaction with a widget in your test, use the WidgetTester
-// utility in the flutter_test package. For example, you can send tap and scroll
-// gestures. You can also use WidgetTester to find child widgets in the widget
-// tree, read text, and verify that the values of widget properties are correct.
-
 import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:mam_core/mam_core.dart';
 
-import 'package:mam_desktop/main.dart';
+import 'package:mam_desktop/src/providers/session_providers.dart';
+import 'package:mam_desktop/src/theme/app_theme.dart';
+import 'package:mam_desktop/src/widgets/detail_pane.dart';
+import 'package:mam_desktop/src/widgets/session_table.dart';
 
 void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
-    // Build our app and trigger a frame.
-    await tester.pumpWidget(const MyApp());
+  testWidgets('SessionTable renders rows and drives selection', (tester) async {
+    final rows = [
+      SessionRow(
+        name: 'demo-session',
+        server: 'default',
+        status: 'running',
+        tmuxAlive: true,
+        pane: const Pane(
+          pid: 123,
+          cwd: '/x',
+          cmd: 'claude',
+          cmdFull: 'claude --foo',
+        ),
+        role: 'creator',
+        resumeState: 'yes',
+        jobId: '-',
+        jobStatus: '-',
+        attachCommand: 'tmux attach -t demo-session',
+        driftClasses: const ['B'],
+      ),
+    ];
 
-    // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
+    String? selected;
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: buildAppTheme(),
+        home: Scaffold(
+          body: SessionTable(
+            sessions: rows,
+            selectedName: null,
+            onSelect: (name) => selected = name,
+          ),
+        ),
+      ),
+    );
 
-    // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
+    expect(find.text('demo-session'), findsOneWidget);
+    expect(find.text('running'), findsOneWidget);
+
+    await tester.tap(find.text('demo-session'));
     await tester.pump();
+    expect(selected, 'demo-session');
+  });
 
-    // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
+  testWidgets('DetailPane shows placeholder when nothing selected', (
+    tester,
+  ) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: buildAppTheme(),
+        home: const Scaffold(body: DetailPane(session: null)),
+      ),
+    );
+
+    expect(find.text('Select a session to see details'), findsOneWidget);
+  });
+
+  test('selectedSessionNameProvider defaults to null', () {
+    final container = ProviderContainer();
+    addTearDown(container.dispose);
+    expect(container.read(selectedSessionNameProvider), isNull);
   });
 }