Give the account-menu avatar a state layer

The trigger had the focus ring but no hover and no pressed feedback at all,
where every comparable trigger in the library carries `state-layer` and M3 asks
for two visual indicators per state. An avatar image sits behind the layer, so
the wash shows over a photograph too.
Plan: docs/plans/material-3-alignment.md, step 21 (navigation N-15).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

resources/views/components/account-menu.blade.php

@@ -38,10 +38,12 @@
             type="button"
             aria-label="{{ $label }}"
             data-account-menu
-            class="touch-target focus-ring inline-flex size-10 shrink-0 cursor-pointer items-center justify-center rounded-corner-full bg-primary-container type-label-lg text-on-primary-container"
+            class="state-layer touch-target focus-ring inline-flex size-10 shrink-0 cursor-pointer items-center justify-center rounded-corner-full bg-primary-container type-label-lg text-on-primary-container"
         >
             @if ($image)
-                <img src="{{ $avatar }}" alt="" class="size-full rounded-corner-full object-cover" />
+                {{-- Behind the state layer (`state-layer` paints its ::before at z-index -1), so an
+                     avatar image still shows the hover and pressed states over it. --}}
+                <img src="{{ $avatar }}" alt="" class="relative -z-20 size-full rounded-corner-full object-cover" />
             @elseif (filled($initials))
                 {{ $initials }}
             @else