show markdown for log analysis (#5059)

fix: https://github.com/flutter/flutter/issues/187577

dashboard/lib/service/data_seeder.dart

diff --git a/dashboard/lib/service/data_seeder.dart b/dashboard/lib/service/data_seeder.dart
index 15c82ff..df4b917 100644
--- a/dashboard/lib/service/data_seeder.dart
+++ b/dashboard/lib/service/data_seeder.dart
@@ -505,7 +505,56 @@
       endTime: creationTime + 60000,
       logAnalysis: switch (status) {
         .failed =>
-          'Based on my analysis of the provided LUCI logs and the context of the changes in this PR, here is the breakdown of the build failure:\n\n ### 1. Identify the specific test or command that failed for $jobName \n...',
+          '''
+Based on the PR description and the provided log metadata for the failed LUCI build, here is the analysis of the failure.
+
+### 1. Specific Test Failure
+The failure occurred in the **Web Long Running Tests (Shard 4, Subshard 5)**.
+Specifically, the test failing is:
+**`packages/flutter/test/widgets/media_query_test.dart`** (or a related widget test involving view padding/system overlays).
+
+### 2. Error Message / Crash Log
+While the full raw log is quite large, the failure block follows **Pattern C**:
+
+```text
+08:42 +412 -1: /b/s/w/ir/x/w/flutter/packages/flutter/test/widgets/media_query_test.dart: MediaQuery.fromView padding and viewPadding
+══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
+The following assertion was thrown running a test:
+Expected: <0.0>
+  Actual: <24.0>
+
+...
+The test description was:
+  MediaQuery.fromView padding and viewPadding
+...
+```
+
+### 3. Root Cause
+The root cause is a **platform-leaking logic change** in the PR.
+
+PR #181051 modifies how the Flutter Framework handles `WindowPadding` and `SystemUiOverlayStyle` to support **Android 15's mandatory edge-to-edge display**.
+
+The PR likely modified shared logic in `packages/flutter/lib/src/widgets/binding.dart` or `packages/flutter/lib/src/services/system_chrome.dart`. Because the Web engine and the mobile engines share parts of the `WindowPadding` and `MediaQuery` calculation logic, a change intended to "default to transparent/edge-to-edge" on Android 15 is being applied to the Web platform during tests.
+
+In this specific shard, the Web test expects the "status bar" padding to be `0.0` (standard for web/desktop browser environments), but the new logic is causing the framework to report a default padding (e.g., `24.0`) as if it were running on a mobile device requiring safe-area insets.
+
+### 4. Suggested Fix
+Ensure that the new Edge-to-Edge defaults and padding overrides are strictly guarded by a check for `TargetPlatform.android`.
+
+**In `packages/flutter/lib/src/widgets/binding.dart` (or the relevant file):**
+Locate where the default `SystemUiOverlayStyle` or `ViewConfiguration` is set and ensure it only applies the Android 15 specific behavior when the host platform is actually Android.
+
+```dart
+// Suggested guard
+if (defaultTargetPlatform == TargetPlatform.android) {
+  // Apply Android 15 edge-to-edge logic
+} else {
+  // Maintain existing behavior for Web/Desktop/iOS
+}
+```
+
+Additionally, if the change to the default padding is intended to be global across the framework, the `media_query_test.dart` needs to be updated to expect the new default values on all platforms, including Web. However, given this is an Android-specific requirement, the logic should most likely be restricted to that platform.
+''',
         _ => null,
       },
     );

dashboard/lib/views/presubmit_view.dart

diff --git a/dashboard/lib/views/presubmit_view.dart b/dashboard/lib/views/presubmit_view.dart
index e566279..4cfe4a9 100644
--- a/dashboard/lib/views/presubmit_view.dart
+++ b/dashboard/lib/views/presubmit_view.dart
@@ -10,6 +10,7 @@
 import 'package:cocoon_common/task_status.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:gpt_markdown/gpt_markdown.dart';
 import 'package:provider/provider.dart';
 import 'package:url_launcher/url_launcher.dart';
 
@@ -502,7 +503,7 @@
                 ),
                 width: double.infinity,
                 child: SingleChildScrollView(
-                  child: Text(
+                  child: GptMarkdown(
                     hasLogAnalysis && _selectedDetailTabIndex == 0
                         ? selectedJob.logAnalysis!
                         : (selectedJob.summary?.trim().isEmpty ?? true

dashboard/pubspec.yaml

diff --git a/dashboard/pubspec.yaml b/dashboard/pubspec.yaml
index dd97054..848c27a 100644
--- a/dashboard/pubspec.yaml
+++ b/dashboard/pubspec.yaml
@@ -34,6 +34,7 @@
   google_sign_in_platform_interface: ^3.0.0
   google_sign_in_web: ^1.0.0
   googleapis: ^14.0.0
+  gpt_markdown: ^1.1.7
   http: 1.6.0 # Rolled by dependabot
   intl: ^0.20.2
   json_annotation: ^4.9.0