What problem(s) was I solving?

The undo toast notifications for archive/draft deletion operations were displaying for 30 seconds before auto-dismissing. This duration was unnecessarily long and could clutter the UI, especially when users perform multiple operations in succession. Users who are familiar with the Z hotkey for undo don't need the toast to persist for such an extended period.

What user-facing changes did I ship?

• Reduced auto-dismiss timeout: Undo toasts for the following operations now auto-dismiss after 10 seconds instead of 30 seconds:
  • Session archiving/unarchiving (single and bulk operations)
  • Draft deletion/discarding (single and bulk operations)
• The Z hotkey functionality remains unchanged - users can still press Z to undo operations while the toast is visible
• The visual appearance and positioning of the toasts remain the same

How I implemented it

Modified the showUndoToast function in humanlayer-wui/src/utils/undoToast.tsx to reduce the toast duration from 30000ms to 10000ms. This is a single-line change that affects all undo toasts consistently across the application.

The change applies to:

• Single session archive/unarchive operations
• Bulk session archive/unarchive operations
• Single draft discard operations
• Bulk draft discard operations

How to verify it

Automated Testing

• make check - All linting and type checking passes
• make test - All unit and integration tests pass

Manual Testing

To verify the toast timeout change:

1. Launch the application
2. Create or navigate to a session
3. Archive a session (or discard a draft)
4. Observe that the undo toast appears with the "Z" hotkey indicator
5. Wait and confirm the toast auto-dismisses after 10 seconds (previously 30 seconds)
6. Test that pressing Z within the 10-second window still successfully undoes the operation

Test scenarios to verify:

• Single session archive - toast dismisses after 10 seconds
• Bulk session archive - toast dismisses after 10 seconds
• Single draft discard - toast dismisses after 10 seconds
• Bulk draft discard - toast dismisses after 10 seconds
• Z hotkey still works to undo within the 10-second window

Description for the changelog

Reduced undo notification auto-dismiss timeout from 30 to 10 seconds for improved UI responsiveness