Draw the FAB's state layer and focus ring from the classes

Plan step 36 ("Interaction is the shared classes", the user, 2026-09-14).
fab.css hand-rolled the same declarations as foundation/interaction.css's
md-state-layer and md-focus-ring; it now renders those classes and keeps
only its own hover elevation, colour and motion. Every FAB size draws at
56px or more, so it needs no md-touch-target.

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

resources/views/components/fab.blade.php

@@ -73,7 +73,7 @@
         'x-bind:data-md-collapsed' => $collapsing ? "collapsed ? '' : null" : null,
         'aria-label' => ! $extended && ! $attributes->has('aria-label') ? $tooltip : null,
         'style' => $anchor ? "anchor-name: {$anchor}" : null,
-    ], fn ($value): bool => $value !== null));
+    ], fn ($value): bool => $value !== null))->class(['md-state-layer', 'md-focus-ring']);
 @endphp
 
 <{{ $tag }} {{ $attributes }}>