Popover's container is a plain Item and never measures its children, so
the three-dots menu on a notification card opened as a 240x28 sliver
with its one row clipped out of existence. TrayMenu and AgentUsagePanel
both carry the antidote — implicit sizes on the Popover itself, taken
from the content column — and now the notification settings menu does
too, with rows filling the window width so the hover reaches the edges.
Claude-Session: https://claude.ai/code/session_01W8icivxZcmFTR2g6DkYhjT