Cut duplicated and speculative code across the package

An over-engineering audit of the whole tree, applied in five reviewed
batches. Behaviour stays the same except where UPGRADE.md says otherwise.

PHP: the showcase and error-page stylesheets are prebuilt into
resources/dist by bin/stylesheets.mjs, through Vite's own postcss-import
(first occurrence kept, the order an application's build gives), instead
of Stylesheets::bundle() inlining imports on every request; only the
import walk DesignGuard needs stays. SchemeStylesheet::withProfiles()
replaces three copies of the scheme-plus-profiles loop, material:scheme
leaves spec and contrast checks to the node script that already made
them, and the error page's scheme cache, the hashed view namespace, the
translations path with no lang/ folder and DesignGuard's 1.x-name hints
are gone.

JS: the androidx shape port progress.js and both bin scripts each carried
lives once in resources/js/shapes.js (the generated SVGs are unchanged);
util.js holds ringIndex(), ms(), reopenGuard() and remember(), which
were written out several times; listeners are released through
AbortController; tooltip.js's hoverPopover() serves the rich tooltip too.

CSS: every rule for an element inside the navigation rail queries
`--md-navigation-rail-value` instead of repeating the seven collapsed
conditions under five media branches; badge, alert, progress, slider and
button read one non-inheriting colour-role table (components/color.css);
the dialog chrome, the submenu's popover chrome, the chip's state layer
and touch target, and the visually-hidden inputs use the shared rules
they copied; foundation/tokens.css is folded into foundation.css.

Views: Support\Field and Support\Link replace the error-key, bound-value
and link-attribute blocks copied into the fields and link components;
the timepicker period group, the menu filter and the showcase head are
partials; the datepicker's steppers and entry fields are loops; component
docblocks no longer restate SKILL.md.

Tests and tooling: one dataset-driven ComponentStylesheetsTest replaces
four per-group files, DesignGuardTest and the layout-component tests use
datasets, browser tests share one ready() helper, CSS parsing lives in
ComponentStylesheet alone. docs/audits and the finding IDs citing it are
removed, as are pestphp/pest-plugin-laravel, the unused composer scripts
and check:font; the lint job runs in the feature job, which now installs
node packages so the prebuilt-stylesheet staleness test runs in CI.

Feature suite 1177 passed, Chrome browser suite 299 passed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/Feature/Components/FeedTest.php

@@ -16,27 +16,10 @@ it('takes a minimum item width as a length or a number of px', function () {
     expect(layoutRoot((string) $this->blade('<x-feed min-item="a third" />'))['style'])->toBe('--md-min-item: 240px;');
 });
 
-it('replaces the spacer with a spacing token, and with no gap for an unknown one', function () {
-    expect(layoutRoot((string) $this->blade('<x-feed gap="space400" />'))['data-md-gap'])->toBe('space400')
-        ->and(layoutRoot((string) $this->blade('<x-feed gap="wide" />'))['data-md-gap'])->toBe('none');
-});
-
-it('takes the element, the visibility props, and the caller\'s class and style after its own', function () {
-    expect(layoutRoot((string) $this->blade('<x-feed as="ul" hide-below="medium" class="photos" style="padding-block: 1rem" />')))
-        ->toMatchArray([
-            '<' => 'ul',
-            'data-md-hide-below' => 'medium',
-            'class' => 'photos',
-            'style' => '--md-min-item: 240px; padding-block: 1rem;',
-        ]);
-});
-
-it('keeps one column on a compact window and fills columns from medium, in the layout layer', function () {
+it('keeps one column on a compact window and fills columns from medium', function () {
     $css = (string) file_get_contents(__DIR__.'/../../../resources/css/layout/feed.css');
 
-    expect($css)->toContain('@layer material.layout')
-        ->toContain("[data-md-feed] {\n        display: grid;\n        grid-template-columns: minmax(0, 1fr);")
+    expect($css)->toContain("[data-md-feed] {\n        display: grid;\n        grid-template-columns: minmax(0, 1fr);")
         ->toContain("@media (width >= 600px) {\n            grid-template-columns: repeat(auto-fill, minmax(min(100%, var(--md-min-item, 240px)), 1fr));")
-        ->not->toContain('grid-auto-flow')
-        ->and((string) file_get_contents(__DIR__.'/../../../resources/css/all.css'))->toContain("@import './layout/feed.css';");
+        ->not->toContain('grid-auto-flow');
 });