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/card.blade.php

@@ -33,8 +33,7 @@
      lands on the card itself. Elevation is separate from the tint — M3 gives each variant its own
      per-state box-shadow (elevated 1dp rest → 2dp hover → 1dp focus/pressed; filled and outlined
      0dp rest → 1dp hover → 0dp focus/pressed) — so it is drawn directly on `[data-md-card]`, never
-     inside the shared class. Its corner does not move, because
-     M3 gives a card one shape (docs/audits/m3-alignment/containment.md, C-13, C-23).
+     inside the shared class. Its corner does not move, because M3 gives a card one shape.
 
      `data-md-dragged` is M3's dragged card, row or not: the top of a card's elevation scale — 8dp
      elevated, 6dp filled and outlined — under the shared class's own 16% dragged tint (it already
@@ -68,14 +67,14 @@
 @endphp
 
 <div
-    {{ $attributes->merge(array_filter([
+    {{ $attributes->merge([
         'data-md-card' => $variant,
         'data-md-list-row' => $actionable ? true : null,
         'data-md-list-actionable' => $actionable ? true : null,
         'tabindex' => $actionable ? '0' : null,
         'role' => $role,
         'aria-label' => $actionable && filled($title) ? $title : null,
-    ], fn ($value): bool => $value !== null))->class([
+    ])->class([
         // Every card: the application sets `data-md-dragged` from script, after this renders.
         'md-state-layer',
         'md-focus-ring' => $isRow,