Rewrite the bottom sheet without Tailwind

Plan step 36 (containment group): <x-bottom-sheet>'s class lists move
into resources/css/components/bottom-sheet.css, keyed on
data-md-bottom-sheet (data-md-open, data-md-standard) and
data-md-bottom-sheet-scrim/-probe/-panel (data-md-preset while
heights/snap gives it stops)/-handle/-grip/-announce/-body/-title/
-actions. x-transition's enter/leave classes are replaced the same way
as drawer.css: @starting-style + transition-behavior: allow-discrete
on the x-show-driven panel, the asymmetric open (spatial-default,
emphasized-decelerate) vs close (effects-default, emphasized-
accelerate) timing coming from the more specific open-state selector's
own transition-duration/-timing-function, which a CSS transition
always takes from the after-change style. data-md-preset adds the
height-between-stops transition (the spatial spring) alongside it,
independent of the open/close slide.

The drag handle (C-01, already fixed in the Tailwind-era markup this
replaces) renders the shared md-focus-ring and md-touch-target classes
instead of a hand-rolled ring: unlike the datepicker's day, its own
visible bar is not a smaller indicator drawn inside a bigger box those
classes cannot reach, so nothing here refines them further. Its 22px
vertical padding (SheetDefaults.kt's DragHandleVerticalPadding) is a
literal, matching alert.css's 12px for the same reason: 22 is not on
the measurement scale.

Hooks renamed data-drag-handle -> data-md-bottom-sheet-handle,
updated in resources/js/bottom-sheet.js and
tests/Browser/ContainmentTest.php; data-sheet -> data-md-drawer in
that test's comment. <x-menu sheet-at-compact> renders this component
unchanged; menu.css now imports bottom-sheet.css, and
tests/Feature/Components/MenuTest.php's stale Tailwind-class assertion
for the embedded sheet is replaced with a hook check. The two
sheet-at-compact browser tests in ActionsTest.php stay on
assertVisible(): the sheet is still x-show-driven (a deliberate choice
for this batch, keeping the existing modal/side-sheet/bottom-sheet
architecture and converting only their styling), so open still shows
as visibility rather than :popover-open; their comments no longer say
"not rewritten in this batch".

Imported from the Containment block of components.css. Browser tests
owed by docs/plans/material-3-browser-tests.md, added to
ContainmentTest.php but not run: dialog divider marks on scroll
(including that a nested dialog keeps its own marks), the full-screen
phone bar, separator always, no fade under reduced motion, the
scrolling body's inset focus ring; bottom sheet preset-height cycling
with its announcement and a drag settling on the nearest stop; the
standard side sheet from 840px without a scrim or a focus trap, modal
below it.

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

tests/Feature/Components/OverlayTest.php

@@ -200,18 +200,19 @@ it('slides a side sheet in from either edge', function () {
 it('draws a modal bottom sheet with a drag handle, or a standard one without a scrim', function () {
     expect((string) $this->blade('<x-bottom-sheet title="Share via">Body</x-bottom-sheet>'))
         ->toContain('...materialBottomSheet(false, JSON.parse(')
-        ->toContain('bg-scrim/32')
+        ->toContain('data-md-bottom-sheet-scrim')
         ->toContain('x-trap.inert.noscroll="open"')
-        ->toContain('rounded-t-corner-xl bg-surface-container-low')
-        ->toContain('data-drag-handle')
+        ->toContain('data-md-bottom-sheet-panel')
+        ->toContain('data-md-bottom-sheet-handle')
+        ->toContain('data-md-bottom-sheet-grip')
         ->toContain('aria-modal="true"')
-        ->toContain('py-5.5')
-        ->toContain('touch-target h-1 w-8 rounded-corner-full bg-on-surface-variant ')
+        ->toContain('md-focus-ring md-touch-target')
         ->toContain('--sheet-max-height: min(50dvh, calc(100dvh - 72px))')
         ->and((string) $this->blade('<x-bottom-sheet standard>Body</x-bottom-sheet>'))
         ->toContain('...materialBottomSheet(true, JSON.parse(')
-        ->not->toContain('bg-scrim/32')
+        ->not->toContain('data-md-bottom-sheet-scrim')
         ->not->toContain('aria-modal')
+        ->toContain('data-md-standard')
         ->and((string) $this->blade('<x-bottom-sheet height="90dvh">Body</x-bottom-sheet>'))
         ->toContain('--sheet-max-height: min(90dvh, calc(100dvh - 72px))');
 });
@@ -258,12 +259,13 @@ it('gives a bottom sheet M3\'s preset heights, cycled from the drag handle', fun
 
     expect($html)
         ->toContain('--sheet-stop: 50dvh; --sheet-max-height: min(var(--sheet-stop), calc(100dvh - 72px))')
-        ->toContain('h-(--sheet-max-height) transition-[height]')
+        ->toContain('data-md-preset')
         ->toContain('x-ref="probe"')
+        ->toContain('data-md-bottom-sheet-probe')
         ->toContain('aria-label="Change the sheet height"')
         ->toContain('x-bind:aria-label="handleLabel"')
         ->toContain('x-on:click="activate()"')
-        ->toContain('<span class="sr-only" aria-live="polite" x-text="announcement"></span>')
+        ->toMatch('/<span data-md-bottom-sheet-announce class="md-visually-hidden" aria-live="polite" x-text="announcement"><\/span>/')
         ->toContain('25dvh')
         ->toContain('90dvh')
         ->toContain('Height 2 of 3')
@@ -275,6 +277,16 @@ it('gives a bottom sheet M3\'s preset heights, cycled from the drag handle', fun
         ->and((string) $this->blade('<x-bottom-sheet heights="50dvh">Body</x-bottom-sheet>'))
         ->toContain('--sheet-max-height: min(50dvh, calc(100dvh - 72px))')
         ->not->toContain('--sheet-stop')
-        ->not->toContain('sr-only')
+        ->not->toContain('data-md-preset')
         ->toContain('aria-label="Close"');
 });
+
+it('draws the bottom sheet from a stylesheet imported from the containment block and by the menu', function () {
+    expect(File::get(__DIR__.'/../../../resources/css/components.css'))
+        ->toContain("@import './components/bottom-sheet.css';")
+        ->and(File::get(__DIR__.'/../../../resources/css/components/menu.css'))
+        ->toContain("@import './bottom-sheet.css';")
+        ->and(File::get(__DIR__.'/../../../resources/js/bottom-sheet.js'))
+        ->toContain('data-md-bottom-sheet-handle')
+        ->not->toContain('data-drag-handle');
+});