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/fab.js

@@ -23,29 +23,28 @@ document.addEventListener('alpine:init', () => {
     window.Alpine.data('materialFab', () => ({
         collapsed: false,
         lastY: 0,
-        ticking: false,
-        listeners: [],
+        frame: null,
+        // Set in init(). Declared here, or Alpine writes them to the outermost x-data scope,
+        // where a second FAB in the same page scope would take the first one's listener.
+        schedule: null,
 
         init() {
             this.lastY = Math.max(window.scrollY, 0)
-            this.listen(window, 'scroll', () => this.queue(), { passive: true })
-        },
-
-        /** One reading a frame: `scroll` fires far more often than anything can be drawn. */
-        queue() {
-            if (this.ticking) {
-                return
+            this.schedule = () => {
+                this.frame ??= requestAnimationFrame(() => this.measure())
             }
 
-            this.ticking = true
+            window.addEventListener('scroll', this.schedule, { passive: true })
+        },
 
-            requestAnimationFrame(() => {
-                this.ticking = false
-                this.measure()
-            })
+        destroy() {
+            window.removeEventListener('scroll', this.schedule)
+            cancelAnimationFrame(this.frame)
         },
 
         measure() {
+            this.frame = null
+
             const y = Math.max(window.scrollY, 0)
             const moved = y - this.lastY
 
@@ -61,14 +60,5 @@ document.addEventListener('alpine:init', () => {
                 this.lastY = y
             }
         },
-
-        listen(target, type, handler, options) {
-            target.addEventListener(type, handler, options)
-            this.listeners.push(() => target.removeEventListener(type, handler, options))
-        },
-
-        destroy() {
-            this.listeners.forEach((remove) => remove())
-        },
     }))
 })