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/BarsTest.php

@@ -82,8 +82,7 @@ function barsProbe()
         </html>
         BLADE));
 
-    return visit('/bars-probe')->waitForEvent('networkidle')
-        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+    return ready(visit('/bars-probe'));
 }
 
 it('moves between tabs with the arrow keys, skipping disabled ones, and tells Livewire', function () {
@@ -285,8 +284,7 @@ function appBarOverflowProbe()
         </html>
         BLADE));
 
-    return visit('/app-bar-overflow-probe')->waitForEvent('networkidle')
-        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+    return ready(visit('/app-bar-overflow-probe'));
 }
 
 it('shows the app bar overflow at exactly 599 and 600px', function () {
@@ -370,8 +368,7 @@ function toolbarScaffoldProbe()
         </html>
         BLADE));
 
-    return visit('/toolbar-scaffold-probe')->waitForEvent('networkidle')
-        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+    return ready(visit('/toolbar-scaffold-probe'));
 }
 
 it('keeps a docked toolbar clear of the navigation bar below medium', function () {
@@ -414,8 +411,7 @@ it('lifts a snackbar above a floating toolbar placed at the bottom, without a sc
         </html>
         BLADE));
 
-    $page = visit('/floating-toolbar-probe')->resize(393, 800)->waitForEvent('networkidle')
-        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+    $page = ready(visit('/floating-toolbar-probe')->resize(393, 800));
 
     $page->script("materialToast('Link copied', { timeout: 10000 })");
     $page->wait(1);
@@ -490,11 +486,10 @@ it('never flashes a tab panel before Alpine boots', function () {
 
     // Only the chosen ("people") panel is on screen at the moment the inline script right after
     // the panels runs — the server's own `style="display: none"`, not Alpine's x-show, is what
-    // kept the other two off screen up to here (N-05).
+    // kept the other two off screen up to here.
     $page = visit('/tabs-first-paint-probe')
         ->assertScript("window.eval('window.firstPaint.join(\",\")') === 'none,block,none'");
 
-    $page->waitForEvent('networkidle')
-        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined'")
+    ready($page, livewire: false)
         ->assertNoJavaScriptErrors();
 });