Add stack_name and container_name columns to notification_history so bell
rows can act as jump points. Producers (AutoHeal, Docker events) pass the
container context through dispatchAlert; the panel renders routable rows
as buttons that load the target stack and, when a container name is
present, open its logs modal. Non-structural notifications stay as
passive display rows.
* feat(ui): redesign user menu and notification panel per design audit
Align both floating surfaces with the stack-view design language: cyan
signal rails, identity headers, strip containers, day-banded streams,
severity rails, Instrument Serif for hero words, and tracked-mono for
metadata. Extract the notifications popover out of EditorLayout into its
own component and introduce a reusable SegmentedControl primitive for
3-way radiogroups (Auto/Light/Dark theme, All/Unread/Alerts filter).
* fix(ui): pin accessible names on avatar and bell buttons
After the redesign the avatar button's text content became the user's
initials and the bell button's text became the unread count, which
displaced the title-based accessible names and broke
getByRole('button', { name: /profile/i }). Set aria-label explicitly on
both triggers and mark the bell badge aria-hidden so screen readers and
role-based selectors see stable names regardless of dynamic content.
Anso