* Drop the APF mark before the wordmark in the admin header, mirroring
the portal-shell brand zone shape. 28px square keeps the lock-up
proportionate to the admin header's compact 3.5rem height (vs
portal-shell's 4rem). The image is decorative (`alt=""` +
`aria-hidden="true"`) — the wordmark + Admin badge already carry
the accessible name.
* Move the gray background + right border from the inner `<nav>` to
the `:host` of `app-admin-sidebar` so the chrome covers the whole
flex column, not just the link rail. Width/flex sizing and a
`display: flex` go with it (custom elements default to `display:
inline` so `:host` needs an explicit display for the background to
render). The inner `<nav>` keeps padding + scroll and now grows with
`flex: 1 1 auto`.
* Add the shared APF logo assets under apps/portal-admin/public/logos/
so the build pipeline picks them up at `/logos/*` per the Angular
static-asset convention.
Julien Gautier
