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/js/toolbar.js

@@ -4,12 +4,13 @@
  * on a right-to-left page; Home and End to its ends). Every control stays in the Tab order, so a
  * control added by a Livewire render is reachable without any bookkeeping.
  */
+import { ringIndex } from './util.js'
+
 const CONTROLS = 'button:not([disabled]), a[href], input:not([disabled]), select:not([disabled]), [tabindex]:not([tabindex="-1"])'
 
 document.addEventListener('alpine:init', () => {
     window.Alpine.data('materialToolbar', (vertical = false) => ({
         move(event) {
-            const keys = vertical ? { ArrowUp: -1, ArrowDown: 1 } : { ArrowLeft: -1, ArrowRight: 1 }
             const controls = [...this.$root.querySelectorAll(CONTROLS)].filter((control) => control.getClientRects().length > 0)
             const at = controls.indexOf(document.activeElement)
 
@@ -17,22 +18,12 @@ document.addEventListener('alpine:init', () => {
                 return
             }
 
-            let next = null
+            const rtl = !vertical && getComputedStyle(this.$root).direction === 'rtl'
+            const next = ringIndex(event.key, at, controls.length, { rtl, vertical })
 
-            if (event.key === 'Home') {
-                next = controls[0]
-            } else if (event.key === 'End') {
-                next = controls.at(-1)
-            } else if (event.key in keys) {
-                const rtl = !vertical && getComputedStyle(this.$root).direction === 'rtl'
-                const by = keys[event.key] * (rtl ? -1 : 1)
-
-                next = controls[(at + by + controls.length) % controls.length]
-            }
-
-            if (next) {
+            if (next !== null) {
                 event.preventDefault()
-                next.focus()
+                controls[next].focus()
             }
         },
     }))