Give every side sheet the close affordance M3 requires

Plan step 12, containment.md C-04. `with-close-button` defaulted to
false, so a drawer could render with no exit at all once
`close-on-escape` and the scrim were off. It now defaults to true, and
`:with-close-button="false"` is ignored where nothing else closes the
sheet: Escape off, the scrim off, or a pane, which has neither.

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

resources/views/components/drawer.blade.php

@@ -25,6 +25,13 @@
      a size container, so its contents lay out by the room the sheet or pane actually has (`@md:`),
      never by the viewport.
 
+     M3 **requires** a close affordance on a side sheet — without one nobody can predict the
+     sheet's open/close flow or tell whether it is transient or permanent
+     (docs/reference/m3/components-actions-communication-containment.md § Side sheets →
+     Accessibility) — so `with-close-button` is on by default, and `:with-close-button="false"` is
+     ignored where nothing else closes the sheet: Escape off, the scrim off, or a pane, which has
+     neither.
+
      maryUI's API, kept: `title`, `subtitle`, `separator`, `with-close-button`, `close-on-escape`,
      `without-backdrop-close`, `right` (ignored; use `side`), and an `actions` slot. --}}
 
@@ -34,7 +41,7 @@
     'separator' => false,
     'side' => 'end',
     'right' => true,
-    'withCloseButton' => false,
+    'withCloseButton' => true,
     'closeOnEscape' => true,
     'withoutBackdropClose' => false,
     'width' => '25rem',
@@ -47,6 +54,10 @@
     $model = $attributes->wire('model')->value() ?: null;
     $id = $attributes->get('id') ?? 'material-sheet-'.substr(md5($model.'|'.$title), 0, 10);
     $start = $side === 'start';
+
+    // M3 requires a close affordance; the prop can only ever add one, never take away the last
+    // way out of the sheet.
+    $closeButton = $withCloseButton || ! $closeOnEscape || $withoutBackdropClose || ($pane && ! $paneCloseOnEscape);
 @endphp
 
 <div
@@ -105,7 +116,7 @@
             $attributes->get('class'),
         ]) }}
     >
-        @if (filled($title) || $withCloseButton)
+        @if (filled($title) || $closeButton)
             <div class="mb-4">
                 <div class="flex items-start justify-between gap-3">
                     <div class="min-w-0">
@@ -118,7 +129,7 @@
                         @endif
                     </div>
 
-                    @if ($withCloseButton)
+                    @if ($closeButton)
                         <span class="-me-3 -mt-2 inline-flex shrink-0">
                             <x-livewire-material::button icon="close" :tooltip-left="__('Close')" x-on:click="close()" />
                         </span>