Land a caller's class and style on the scaffold and tooltip roots

Plan step 39 (part 0): the step 38 review found <x-scaffold> and
<x-tooltip> never referencing $attributes, so a caller's class and
style were silently dropped. The scaffold's root is its single
data-md-scaffold div; the tooltip's root, documented in its header, is
the standalone wrapper it draws around a trigger (data-md-tooltip-anchor,
merged with its own anchor-name) — passed an anchor instead, it renders
only a popover fragment beside another component's root and takes
nothing of the caller's.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

tests/Feature/Components/TooltipTest.php

@@ -52,6 +52,13 @@ it('draws M3\'s plain tooltip in the inverse surface, and fades on the effects s
         ->and($css->declarations('[data-md-tooltip]:popover-open', ['@starting-style']))->toBe(['opacity' => '0']);
 });
 
+it('takes the caller\'s class and style on the standalone wrapper, its root', function () {
+    $root = layoutRoot((string) $this->blade('<x-tooltip text="Copy link" class="inline-flex" style="gap: 4px"><button>Copy</button></x-tooltip>'));
+
+    expect($root)->toMatchArray(['<' => 'span', 'data-md-tooltip-anchor' => '', 'class' => 'inline-flex'])
+        ->and($root['style'])->toStartWith('anchor-name: --material-tooltip-')->toEndWith('; gap: 4px;');
+});
+
 it('escapes its text', function () {
     $this->blade('<x-tooltip text="<b>bold</b>"><span>x</span></x-tooltip>')
         ->assertSee('&lt;b&gt;bold&lt;/b&gt;', false);