BUG: BuildContext used across async gaps causes crash in task, ticket and workspace screens

[Muneerali199]

Is there an existing issue for this?

• I have searched the existing issues

What happened?

ScaffoldMessenger.of(context) and Navigator are called after await expressions in multiple screens without checking mounted first. If the user navigates away before the async operation completes, the widget is unmounted and accessing context will throw:

"Looking up a deactivated widget's ancestor is unsafe"

This causes a runtime crash in production.

Affected Locations (7 places across 3 files)

File	Line	Issue
lib/screens/tasks/task_screen.dart	108	ScaffoldMessenger.of(context) in catch block after await
lib/screens/tasks/task_screen.dart	128	ScaffoldMessenger.of(context) in catch block after await
lib/screens/tasks/task_screen.dart	174	ScaffoldMessenger.of(context) after await Navigator.push
lib/screens/tickets/ticket_screen.dart	165	ScaffoldMessenger.of(context) after await Navigator.push
lib/screens/workspace/workspace_screen.dart	83	ScaffoldMessenger.of(context) after await in .then()
lib/screens/workspace/workspace_screen.dart	109	ScaffoldMessenger.of(context) after await in .then()
lib/screens/workspace/workspace_screen.dart	135	ScaffoldMessenger.of(context) after await in .then()

Steps to Reproduce

1. Open Task screen, quickly navigate away while a status update is in progress
2. App crashes with "Looking up a deactivated widget's ancestor is unsafe"

Expected Behavior

App checks if (mounted) before using context after any await.

Fix

Wrap every context usage after an await in a mounted check:

// BEFORE (unsafe)
} catch (e) {
  ScaffoldMessenger.of(context).showSnackBar(...);
}

// AFTER (safe)
} catch (e) {
  if (mounted) {
    ScaffoldMessenger.of(context).showSnackBar(...);
  }
}

Evidence

flutter analyze reports:

info - Don't use 'BuildContext's across async gaps — task_screen.dart:108
info - Don't use 'BuildContext's across async gaps — task_screen.dart:128
info - Don't use 'BuildContext's across async gaps — task_screen.dart:174
info - Don't use 'BuildContext's across async gaps — ticket_screen.dart:165
info - Don't use 'BuildContext's across async gaps — workspace_screen.dart:83
info - Don't use 'BuildContext's across async gaps — workspace_screen.dart:109
info - Don't use 'BuildContext's across async gaps — workspace_screen.dart:135

Record

• I agree to follow this project's Code of Conduct
• I want to work on this issue