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/CarouselTest.php

@@ -135,7 +135,7 @@ it('leaves an uncontained carousel unsnapped, and scrolls a full-screen one down
         ->toContain('data-md-carousel="multi-browse"');
 
     // M3: one edge-to-edge item at a time, scrolled vertically, 16px apart, no corner, no mask,
-    // and never wider than the medium window it is meant for (C-11).
+    // and never wider than the medium window it is meant for.
     expect($carousel->declarations("[data-md-carousel='full-screen'] > [data-md-carousel-scroller]"))
         ->toBe([
             'margin-inline' => 'auto',
@@ -210,7 +210,7 @@ it('lays a label over an item on a scrim, and passes attributes to the item', fu
 
     $item = ComponentStylesheet::read('carousel-item');
 
-    // The scrim under the label and the item's literal white ink over it are deliberate (C-25).
+    // The scrim under the label and the item's literal white ink over it are deliberate.
     expect($item->declarations('[data-md-carousel-surface] > [data-md-carousel-label]'))
         ->toHaveKey('background', 'linear-gradient(to top, color-mix(in srgb, var(--md-sys-color-scrim) 60%, transparent), transparent)')
         ->and($item->declarations('[data-md-carousel-label] > [data-md-carousel-label-text]'))