Give the bottom sheet's drag handle a 48dp target

Plan step 12, containment.md C-01. The handle button was 32x4px: the
padding that makes M3's 48dp hit target sat on the wrapper, which is not
the control. `touch-target` on the button and 22px above and below it —
SheetDefaults.kt's DragHandleVerticalPadding — make the pressed area
48x48 while the handle is still drawn 32x4.

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

tests/Feature/Components/OverlayTest.php

@@ -86,6 +86,8 @@ it('draws a modal bottom sheet with a drag handle, or a standard one without a s
         ->toContain('rounded-t-corner-xl bg-surface-container-low')
         ->toContain('data-drag-handle')
         ->toContain('aria-modal="true"')
+        ->toContain('py-5.5')
+        ->toContain('touch-target h-1 w-8')
         ->and((string) $this->blade('<x-bottom-sheet standard>Body</x-bottom-sheet>'))
         ->toContain('...materialBottomSheet(true)')
         ->not->toContain('bg-scrim/32')