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>

resources/views/components/menu-item.blade.php

@@ -34,10 +34,10 @@
      the icon over the ink this file gives it, because a caller's unlayered class always outranks
      the package's layer — except a disabled item's icon, which stays disabled regardless.
 
-     48px tall (M3's published row height wins over SegmentedMenuTokens' own 44dp, ACT-28),
-     body-large label, 20px icons, 16px either side (SegmentedMenuTokens' Expressive spacing,
-     ACT-11), 4px corners that open to 12px at the ends of the list — the corner on the spatial
-     spring and the colour on the effects one, apart (ACT-19).
+     48px tall (M3's published row height wins over SegmentedMenuTokens' own 44dp),
+     body-large label, 20px icons, 16px either side (SegmentedMenuTokens' Expressive spacing),
+     4px corners that open to 12px at the ends of the list — the corner on the spatial
+     spring and the colour on the effects one, apart.
 
      Drawn by resources/css/components/menu-item.css from `data-md-menu-item`,
      `data-md-description` and the item's aria-* state. --}}
@@ -84,10 +84,7 @@
         'aria-controls' => $submenu ? "material-submenu-{$key}" : null,
         'x-on:click' => $submenu ? "toggle('first')" : null,
         'type' => $isLink ? null : 'button',
-        'href' => $isLink ? $link : null,
-        'target' => $isLink && $external ? '_blank' : null,
-        'rel' => $isLink && $external ? 'noopener' : null,
-        'wire:navigate' => $isLink && ! $external && ! $noWireNavigate && ! $attributes->has('wire:navigate') ? true : null,
+        ...\NoNameWeb\LivewireMaterial\Support\Link::attributes($isLink, $link, $external, $attributes, $noWireNavigate),
         // Opening a submenu is not choosing anything: the outer menu stays where it was.
         'data-md-keep-open' => $keepOpen || $submenu ? true : null,
     ], fn ($value): bool => $value !== null))->class(['md-state-layer', 'md-focus-ring']);