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/partials/timepicker-period.blade.php

@@ -0,0 +1,27 @@
+{{-- The AM/PM radio group, drawn once here and included from both the dial and the typing mode of
+     resources/views/components/timepicker.blade.php, since the two draw it byte for byte alike. --}}
+                    <div
+                        data-md-timepicker-period
+                        role="radiogroup"
+                        aria-label="{{ __('Select AM or PM') }}"
+                        x-show="! is24"
+                        x-on:keydown.arrow-right.prevent="movePeriod($event)"
+                        x-on:keydown.arrow-left.prevent="movePeriod($event)"
+                        x-on:keydown.arrow-down.prevent="movePeriod($event)"
+                        x-on:keydown.arrow-up.prevent="movePeriod($event)"
+                    >
+                        @foreach ([false => 'am', true => 'pm'] as $pm => $period)
+                            <button
+                                type="button"
+                                data-md-timepicker-period-option="{{ $period }}"
+                                class="md-state-layer md-focus-ring"
+                                role="radio"
+                                aria-checked="false"
+                                x-bind:aria-checked="({{ $pm ? '' : '! ' }}isPm).toString()"
+                                x-bind:tabindex="({{ $pm ? '' : '! ' }}isPm) ? 0 : -1"
+                                x-bind:disabled="! periodAllowed({{ $pm ? 'true' : 'false' }})"
+                                x-on:click="setPeriod({{ $pm ? 'true' : 'false' }})"
+                                x-text="periods[{{ (int) $pm }}]"
+                            >{{ $pm ? __('PM') : __('AM') }}</button>
+                        @endforeach
+                    </div>