fix: add error handling for launchUrl in About Us feedback link

[prajakta128]

Fixes#3374

Problem

The feedback/bug-report link in the About Us screen called launchUrl() directly with no canLaunchUrl check and no try/catch. If the URL fails to launch for any reason (no browser, network issue, invalid URL), the app throws an unhandled exception and crashes.

Root Cause

Line 138 of lib/view/about_us_screen.dart:

onTap: () async {
  await launchUrl(Uri.parse(appLocalizations.feedbackForm));
},

Other links in the same file already use canLaunchUrl guard correctly, but this one was missed.

Fix

Added canLaunchUrl check before calling launchUrl, consistent with the existing pattern used by other links in the same file:

onTap: () async {
  final uri = Uri.parse(appLocalizations.feedbackForm);
  if (await canLaunchUrl(uri)) {
    await launchUrl(uri);
  } else {
    debugPrint('Could not launch ${appLocalizations.feedbackForm}');
  }
},

Impact

• Prevents app crash when feedback URL cannot be launched
• Consistent with how all other links in about_us_screen.dart are handled
• No UI change

Screenshots / Recordings

N/A — crash fix, no UI changes

Checklist

• No hard coding: I have used values from constants.dart or localization files instead of hard-coded values.
• No end of file edits: No modifications done at end of resource files.
• Code reformatting: I have formatted the code using dart format or the IDE formatter.
• Code analysis: My code passes checks run in flutter analyze and tests run in flutter test.

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[github-actions]

Build Status

Build successful. APKs to test: https://github.com/fossasia/pslab-app/actions/runs/28354945593/artifacts/7945123360.

Screenshots

Android Screenshots

iPhone Screenshots

iPad Screenshots

[rahul31124]

Hi @prajakta128, could you please remove the following files?

• lib/providers/board_state_provider.dart
• windows/CMakeLists.txt

[prajakta128]

Closing this PR — it accidentally included files from already-merged PRs (lib/providers/board_state_provider.dart and windows/CMakeLists.txt) due to branching on top of earlier work instead of from main.

I've opened a clean PR with only the About Us fix: #3382