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/AppBarTest.php

@@ -179,11 +179,11 @@ it('centres a headline on a three-column row and curves the search container', f
     $css = ComponentStylesheet::read('app-bar');
 
     expect(file_get_contents(__DIR__.'/../../../resources/css/components/app-bar.css'))
-        // Not a fixed 56px inset, which fits exactly one of M3's two trailing buttons (N-11).
+        // Not a fixed 56px inset, which fits exactly one of M3's two trailing buttons.
         ->not->toContain('inset-inline: 56px;')
         ->and($css->declarations('[data-md-app-bar][data-md-variant=\'center\'] [data-md-app-bar-row]'))
         ->toBe(['display' => 'grid', 'grid-template-columns' => '1fr auto 1fr'])
-        // 312dp, then half of what is left (N-09).
+        // 312dp, then half of what is left.
         ->and($css->declarations('[data-md-app-bar-search]'))
         ->toHaveKey('max-width', 'calc(312px + (100% - 312px) / 2)');
 });
@@ -204,20 +204,21 @@ it('keeps a toolbar at the bottom clear of the navigation bar', function () {
     $css = ComponentStylesheet::read('toolbar');
 
     expect($css->declarations('[data-md-toolbar-place=\'bottom\']'))
-        // Never a sum: --material-bottom-bar already swallows the bottom safe area (N-02).
+        // Never a sum: --material-bottom-bar already swallows the bottom safe area.
         ->toHaveKey('bottom', 'calc(max(var(--material-bottom-bar, 0px), var(--material-safe-bottom, env(safe-area-inset-bottom))) + var(--md-sys-measurement-space200))')
         ->and($css->declarations('[data-md-toolbar][data-md-variant=\'docked\'][data-md-toolbar-place=\'bottom\']'))
         ->toHaveKey('bottom', 'var(--material-bottom-bar, 0px)')
-        // A vertical toolbar keeps 24dp from the edge where a horizontal one keeps 16 (N-12).
+        // A vertical toolbar keeps 24dp from the edge where a horizontal one keeps 16.
         ->and($css->declarations('[data-md-toolbar][data-md-vertical][data-md-toolbar-place=\'end\'], [data-md-toolbar-group][data-md-vertical][data-md-toolbar-place=\'end\']'))
         ->toBe(['inset-inline-end' => 'calc(var(--md-sys-measurement-space300) + var(--material-safe-right, env(safe-area-inset-right)))'])
-        // A standard toolbar's standard buttons are primary (N-13).
+        // A standard toolbar's standard buttons are primary.
         ->and($css->declarations('[data-md-toolbar]:not([data-md-vibrant]) [data-md-icon-button]:not([data-md-variant=\'filled\'], [data-md-variant=\'tonal\'], [data-md-selected=\'true\'], [aria-pressed=\'true\'], :disabled, [aria-disabled=\'true\'])'))
         ->toBe(['color' => 'var(--md-sys-color-primary)']);
 
-    // N-13 names the *standard* button, so a button that fills its own container keeps the label
-    // colour that goes with that fill: a filled button painted primary put a primary icon on a
-    // primary fill, and the current page's button in a navigation toolbar came out a blank circle.
+    // The rule above names the *standard* button, so a button that fills its own container keeps
+    // the label colour that goes with that fill: a filled button painted primary put a primary
+    // icon on a primary fill, and the current page's button in a navigation toolbar came out a
+    // blank circle.
     foreach (['[data-md-toolbar]:not([data-md-vibrant]) [data-md-icon-button]', '[data-md-toolbar][data-md-vibrant] [data-md-icon-button]'] as $scope) {
         preg_match_all('/'.preg_quote($scope, '/').':not\([^{]*\{[^}]*\bcolor:/', $css->css, $rules);
 
@@ -256,7 +257,7 @@ it('offers M3\'s three contrast levels, marking the one in force', function () {
     expect((string) $this->blade('<x-theme-toggle mode="contrast" />'))
         ->toContain('data-md-theme-toggle="contrast"')
         ->toContain('aria-label="Contrast"')
-        // A connected button group over native radios, not the deprecated segmented button (N-04).
+        // A connected button group over native radios, not the deprecated segmented button.
         ->toContain('data-md-button-group="connected"')
         ->toContain('name="material-contrast"')
         ->toContain('value="standard"')
@@ -281,7 +282,7 @@ it('switches the theme through the store in three shapes', function () {
         ->toContain('data-md-theme-toggle="toggle"')
         ->toContain('data-md-icon-button')
         ->toContain('aria-label="Dark theme"')
-        // 40px drawn, 48px reached: M3's minimum target (N-01).
+        // 40px drawn, 48px reached: M3's minimum target.
         ->toContain('md-touch-target')
         ->toContain('$store.theme.toggle()')
         ->and((string) $this->blade('<x-theme-toggle mode="cycle" />'))
@@ -315,8 +316,8 @@ it('opens an account menu from the initials of a name', function () {
     expect($html)
         ->toContain('aria-label="Account"')
         ->toContain('data-md-account-menu')
-        // The 40px avatar reaches 48px, and nothing clips the pseudo-target (N-01); the trigger
-        // has a hover and a pressed state like every other trigger in the library (N-15).
+        // The 40px avatar reaches 48px, and nothing clips the pseudo-target; the trigger
+        // has a hover and a pressed state like every other trigger in the library.
         ->toContain('md-state-layer md-touch-target md-focus-ring')
         ->not->toContain('overflow-hidden')
         ->toMatch('/>\s*AM\s*<\/button>/')
@@ -335,6 +336,6 @@ it('opens an account menu from the initials of a name', function () {
         ->toHaveKey('border-radius', 'var(--md-sys-shape-corner-full)')
         ->and($css->declarations('[data-md-account-menu-avatar]'))
         // Behind the state layer's ::before (z-index -1), so a hover or a press still washes over
-        // the picture instead of under it (N-15).
+        // the picture instead of under it.
         ->toHaveKey('z-index', '-2');
 });