Made Execution Details text in Dashboard Checks selectable (#5120)

fix: https://github.com/flutter/flutter/issues/190147

dashboard/lib/views/presubmit_view.dart

diff --git a/dashboard/lib/views/presubmit_view.dart b/dashboard/lib/views/presubmit_view.dart
index 9dbba0b..61a75b9 100644
--- a/dashboard/lib/views/presubmit_view.dart
+++ b/dashboard/lib/views/presubmit_view.dart
@@ -630,16 +630,18 @@
                   borderRadius: BorderRadius.circular(6),
                 ),
                 width: double.infinity,
-                child: SingleChildScrollView(
-                  child: GptMarkdown(
-                    hasLogAnalysis && _selectedDetailTabIndex == 0
-                        ? selectedJob.logAnalysis!
-                        : (selectedJob.summary?.trim().isEmpty ?? true
-                              ? _getDefaultJobDetails(selectedJob)
-                              : selectedJob.summary!),
-                    style: const TextStyle(
-                      fontFamily: 'monospace',
-                      fontSize: 13,
+                child: SelectionArea(
+                  child: SingleChildScrollView(
+                    child: GptMarkdown(
+                      hasLogAnalysis && _selectedDetailTabIndex == 0
+                          ? selectedJob.logAnalysis!
+                          : (selectedJob.summary?.trim().isEmpty ?? true
+                                ? _getDefaultJobDetails(selectedJob)
+                                : selectedJob.summary!),
+                      style: const TextStyle(
+                        fontFamily: 'monospace',
+                        fontSize: 13,
+                      ),
                     ),
                   ),
                 ),

dashboard/test/views/presubmit_view_test.dart

diff --git a/dashboard/test/views/presubmit_view_test.dart b/dashboard/test/views/presubmit_view_test.dart
index d2aa134..7b28f1b 100644
--- a/dashboard/test/views/presubmit_view_test.dart
+++ b/dashboard/test/views/presubmit_view_test.dart
@@ -17,6 +17,7 @@
 import 'package:flutter_dashboard/widgets/sha_selector.dart';
 import 'package:flutter_dashboard/widgets/state_provider.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:gpt_markdown/gpt_markdown.dart';
 import 'package:mockito/mockito.dart';
 import 'package:provider/provider.dart';
 
@@ -391,6 +392,91 @@
     },
   );
 
+  testWidgets(
+    'PreSubmitView Execution Details ScrollView is wrapped in SelectionArea',
+    (WidgetTester tester) async {
+      tester.view.physicalSize = const Size(2000, 1080);
+      tester.view.devicePixelRatio = 1.0;
+      addTearDown(tester.view.resetPhysicalSize);
+      addTearDown(tester.view.resetDevicePixelRatio);
+
+      const mockSha = 'decaf_3_real_sha';
+      const guardResponse = PresubmitGuardResponse(
+        prNum: 123,
+        author: 'dash',
+        guardStatus: GuardStatus.failed,
+        checkRunId: 456,
+        stages: [
+          PresubmitGuardStage(
+            name: 'Engine',
+            createdAt: 0,
+            jobs: {'Mac mac_host_engine 1': TaskStatus.failed},
+          ),
+        ],
+      );
+
+      when(
+        mockCocoonService.fetchPresubmitGuard(
+          repo: anyNamed('repo'),
+          sha: mockSha,
+        ),
+      ).thenAnswer((_) async => const CocoonResponse.data(guardResponse));
+
+      when(
+        mockCocoonService.fetchPresubmitJobDetails(
+          checkRunId: anyNamed('checkRunId'),
+          jobName: argThat(contains('mac_host_engine'), named: 'jobName'),
+        ),
+      ).thenAnswer(
+        (_) async => CocoonResponse.data([
+          PresubmitJobResponse(
+            attemptNumber: 1,
+            jobName: 'Mac mac_host_engine 1',
+            creationTime: 0,
+            status: TaskStatus.failed,
+            summary: 'Execution details summary',
+          ),
+        ]),
+      );
+
+      await tester.runAsync(() async {
+        await tester.pumpWidget(
+          createPreSubmitView({'repo': 'flutter', 'pr': '123'}),
+        );
+        for (var i = 0; i < 50; i++) {
+          await tester.pump();
+          await Future<void>.delayed(const Duration(milliseconds: 50));
+          if (find.textContaining('by dash').evaluate().isNotEmpty) break;
+        }
+      });
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.textContaining('mac_host_engine').first);
+      await tester.runAsync(() async {
+        for (var i = 0; i < 50; i++) {
+          await tester.pump();
+          await Future<void>.delayed(const Duration(milliseconds: 50));
+          if (find
+              .textContaining('Execution details summary')
+              .evaluate()
+              .isNotEmpty) {
+            break;
+          }
+        }
+      });
+      await tester.pumpAndSettle();
+      expect(
+        find.byWidgetPredicate(
+          (widget) =>
+              widget is SelectionArea &&
+              widget.child is SingleChildScrollView &&
+              (widget.child as SingleChildScrollView).child is GptMarkdown,
+        ),
+        findsOneWidget,
+      );
+    },
+  );
+
   testWidgets('PreSubmitView displays Log Analysis tab when present', (
     WidgetTester tester,
   ) async {