Epic details list their cards by status, with live updates

Epic details have a new Cards section, just above comments and activity, that lists the epic's cards grouped by status.

Cards section of an epic, with a progress bar in the header and cards grouped by status from Done down to Backlog, the Done group collapsed.
The Cards section in an epic's details.

The groups run from Done down to Backlog, and Done starts collapsed. Each row shows the card's title and assignees, with a red exclamation mark first when the card is overdue, and opens the card when you click it. The section's header carries the epic's progress bar from the roadmap, and hovering it shows the counts and the total of estimated points.

Add card, at the foot of the list, creates a backlog card that already belongs to the epic. The list updates live as cards move, change, or join and leave the epic.

The MCP epic tool now returns the epic's cards in board order, and the REST API can list a project's cards by epic.

People who leave or are removed from a workspace no longer get its notifications, and the assignee and @mention pickers no longer offer them. They still appear wherever they were already assigned or mentioned.