upgrade: update dependency flutter to v3.38.7

[renovate]

This PR contains the following updates:

Package	Update	Change	Pending
flutter (source)	minor	3.35.2 → 3.38.7	3.38.9 (+1)

---

Release Notes

flutter/flutter (flutter)

v3.38.7

Compare Source

• flutter/179857 - flutter run -d all crashes if multiple devices are available.

v3.38.6

Compare Source

• flutter/179139 - flutter widget-preview start creates new cached build artifacts on each run, resulting in increasing disk usage after each run.
• flutter/178896 - Apps crash during launch on Windows when run from paths containing non-ASCII characters.
• flutter/176943 - Configuration changes to run tests on macOS 15 or 15.7.2 for Flutter's CI.
• flutter/179914 - Flutter Android apps that upgrade to AGP 9.0.0 require migration steps.
• flutter/175099 - When WebViews are scrolled on iOS 26, they become unclickable.
• flutter/175074 - When the virtual keyboard is closed on Android web, the area behind it remains blank and the app only draws in the area that used to be above the keyboard.
• flutter/180381 - Apps crash on Android when enabling accessibility, hiding a platform view, and pulling out the top curtain.

v3.38.5

Compare Source

• flutter/179700 Update dart to 3.10.4.

v3.38.4

Compare Source

• flutter/178547 Rendering issues in the Linux desktop embedder when using Skia.
• flutter/178529 AppLocalizations getting deleted when running debug web
• flutter/178660 flutter widget-preview start can crash if .dart_tool/widget_preview_scaffold/.dart_tool doesn't exist on subsequent runs.
• flutter/175227 Flutter Web applications launched in Chrome show a warning related to --no-sandbox.
• flutter/179155 flutter widget-preview start crashes if a file named pubspec.yaml is modified outside the root of the previewed project.
• flutter/156692 flutter attach can crash if the target application disconnects unexpectedly.
• flutter/179008 flutter pub get could be spawned multiple times on MacOS when pubspec.yamls outside of the project were modified after a flutter pub get in the root project.
• flutter/178715 Running flutter test on Linux/MacOS for Android projects with build hooks fails without the desktop native tooling installed.

v3.38.3

Compare Source

• flutter/178772 Flutter engine reports a different version than the framework.
• flutter/178804 Bump Dart version to 3.10.1.

v3.38.2

Compare Source

• flutter/178472 Widget preview command can crash on exit if in the middle of analyzing changes to a Dart file.
• flutter/178452 Flutter fails to build on iOS with error message: "Improperly formatted define flag" in add-to-app scenarios.
• flutter/178486 When running flutter widget-preview start with Flutter Web disabled, an exception is thrown and the widget previewer fails to start.
• flutter/178317 Running flutter pub get can crash the widget previewer when plugin dependencies are added or updated.
• flutter/178318 Certain flutter crash scenarios can result in multiple crash reports being submitted for a single process crash.
• flutter/176399 Visual Studio 2026 is not supported when compiling Windows desktop applications.
• flutter/175058 The widget previewer fails to start if flutter pub get has not been run in the target project.
• flutter/178421 When debugging from an IDE with a physical iOS 26 device, IDE installs an app but hangs on a white screen during launching.

v3.38.1

Compare Source

• flutter/178400 Adds support for Dart 3.10 stable.

v3.38.0

Compare Source

Learn about what's new in this release in the blog post, and check out the CHANGELOG for a detailed list of all the new changes.

v3.35.7

Compare Source

• flutter/174082 Apps, on all platforms, that extend MenuController class see a compile time failure when building.
• flutter/173770 Mitigates a memory leak that occurs on Android, when Activities are not kept upon exit and an Activity is exited and re-entered.

v3.35.6

Compare Source

• flutter/175669 flutter analyze --suggestions supports versions up to Java 25, Gradle 9 and AGP 9, Kotlin 2.2.20.
• flutter/172624 Fixes an issue that could result in a corrupt pipeline cache when using the Impeller Vulkan back end.

v3.35.5

Compare Source

• flutter/172105 Flutter view no longer hangs after multiple transitions on iOS add-to-app.
• flutter/173106 Multiple cursors display correctly.

v3.35.4

Compare Source

• flutter/173474 - On all platforms PlatformDispatchers.instance.engineId no longer returns null after hot restart.
• flutter/174513 - On iOS 26, fix a bug where platform view's gesture blocking fails and lets touches on Flutter views fall through to underlying platform views.

v3.35.3

Compare Source

• flutter/172627 - Unnecessary output is printed in non-verbose mode.
• flutter/173917 - On Android, flutter build apk may fail to calculate the version code when using --build-number.
• flutter/174437 - When running a Flutter web application in debug mode, the console is spammed with non-fatal error messages.
• flutter/174267 - Golden test failures can cause the test harness to stall.
• flutter/171691 - A race condition can cause crashes in the Impeller Vulkan back end.
• flutter/174100 - Superellipses may not render correctly when using Impeller.
• flutter/174015 - Obsolete warning and error messages are shown when switching between build modes in Xcode.

---

Configuration

📅 Schedule: Branch creation - Only on Wednesday ( * * * * 3 ) in timezone Asia/Tokyo, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.53%. Comparing base (b70a7aa) to head (cab637e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #723   +/-   ##
=======================================
  Coverage   96.53%   96.53%           
=======================================
  Files          24       24           
  Lines         924      924           
=======================================
  Hits          892      892           
  Misses         32       32           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.