Keep the snackbar's live region in the page

The region carrying aria-live was created together with its message, inside the
x-if that draws the snackbar, so a screen reader had nothing to notice changing.
It moves to the permanent host, which is polite and atomic as M3 asks; a type
now only picks the region's role, and the explicit aria-live keeps an error
polite too. Plan step 11, actions.md ACT-02.

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

resources/views/components/toast.blade.php

@@ -15,6 +15,12 @@
      the queue: a toast that arrives meanwhile shows in its place, and the sticky one comes back
      once the queue is empty. One is kept at a time; a newer sticky toast replaces it.
 
+     The live region is the host itself, not the snackbar: a region must be in the page before its
+     contents change for a screen reader to announce them reliably, and the snackbar comes and
+     goes. It is `aria-live="polite" aria-atomic="true"`, as M3 asks for a snackbar (never
+     assertive); a `type` picks the region's role — `alert` for an error or a warning, `status`
+     otherwise — and the explicit `aria-live` keeps even those polite.
+
      Hooks for tests and styling: `data-toast` on the snackbar on screen, `data-toast-action` on its
      action button.
 
@@ -33,6 +39,10 @@
 @persist('material-toast')
     <div
         x-data="materialSnackbar"
+        x-bind:role="current && (current.type === 'error' || current.type === 'warning') ? 'alert' : 'status'"
+        role="status"
+        aria-live="polite"
+        aria-atomic="true"
         {{ $attributes->class([
             'pointer-events-none fixed inset-x-4 z-50 flex bottom-[calc(var(--material-bottom-bar,0px)+1rem)]',
             'justify-center' => $position !== 'bottom-start',
@@ -43,8 +53,6 @@
             <div
                 x-bind:key="current.id"
                 data-toast
-                x-bind:role="current.type === 'error' || current.type === 'warning' ? 'alert' : 'status'"
-                aria-live="polite"
                 x-on:mouseenter="pause()"
                 x-on:mouseleave="resume()"
                 x-on:focusin="pause()"

tests/Feature/Components/ToastTest.php

@@ -18,6 +18,16 @@ it('marks the snackbar and its action for tests and styling', function () {
     $html = (string) $this->blade('<x-toast />');
 
     expect($html)
-        ->toMatch('/<div\s[^>]*\bdata-toast\b[^>]*aria-live="polite"/')
+        ->toMatch('/<div\s[^>]*\bdata-toast\b/')
         ->toMatch('/<button\s[^>]*\bdata-toast-action\b[^>]*x-on:click="act\(\)"/');
 });
+
+it('keeps the live region in the page, polite, around the snackbar that comes and goes', function () {
+    $html = (string) $this->blade('<x-toast />');
+
+    expect($html)
+        ->toMatch('/<div\s[^>]*x-data="materialSnackbar"[^>]*aria-live="polite"/')
+        ->toContain('aria-atomic="true"')
+        ->toContain("x-bind:role=\"current && (current.type === 'error' || current.type === 'warning') ? 'alert' : 'status'\"")
+        ->and(substr_count($html, 'aria-live'))->toBe(1);
+});