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/Browser/ShowcaseTest.php

@@ -7,8 +7,7 @@ it('opens the showcase in a real browser', function () {
 });
 
 it('moves between sections through the rail and the next-section link, keeping the rail', function () {
-    $page = visit('/material')->waitForEvent('networkidle')
-        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+    $page = ready(visit('/material'));
 
     $page->click('[data-md-navigation-rail-panel] a[href$="/material/buttons"]')
         ->assertSee('Variants')
@@ -21,8 +20,7 @@ it('moves between sections through the rail and the next-section link, keeping t
 });
 
 it('finds a component from anywhere and opens its section', function () {
-    $page = visit('/material/buttons')->waitForEvent('networkidle')
-        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+    $page = ready(visit('/material/buttons'));
 
     $page->keys('#content', '/')
         ->assertScript("document.activeElement.id === 'showcase-search'");
@@ -36,8 +34,7 @@ it('finds a component from anywhere and opens its section', function () {
 });
 
 it('opens an example on another page at the example', function () {
-    $page = visit('/material')->waitForEvent('networkidle')
-        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+    $page = ready(visit('/material'));
 
     $page->click('#showcase-search')
         ->type('#showcase-search', 'split button')
@@ -47,8 +44,7 @@ it('opens an example on another page at the example', function () {
 });
 
 it('says so when nothing matches', function () {
-    visit('/material')->waitForEvent('networkidle')
-        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'")
+    ready(visit('/material'))
         ->click('#showcase-search')
         ->type('#showcase-search', 'zzzz')
         ->assertSeeIn('[data-md-search-view]', 'Nothing matches');