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/css/components/toast.css

@@ -15,19 +15,19 @@
  * as M3 nudges a snackbar clear of a docked toolbar and never in front of navigation;
  * `data-md-position="bottom-start"` moves it to the start edge, with M3's margin growing from `medium`. resources/js/snackbar.js
  * publishes the snackbar's own height as `--material-snackbar-height`, so a FAB (fab.css) can
- * lift clear of it — M3 puts a snackbar above a FAB, never in front of or behind one (ACT-17).
+ * lift clear of it — M3 puts a snackbar above a FAB, never in front of or behind one.
  * Below `medium` it is full width; from there it hugs its line length, which an application's own
  * class can still bound.
  *
  * The action and the close button are both drawn at 40px and render the foundation's
  * `md-state-layer`, `md-focus-ring` and `md-touch-target` (foundation/interaction.css) to reach
- * M3's 48px target (ACT-18); nothing here copies their rules.
+ * M3's 48px target; nothing here copies their rules.
  *
  * It enters on a translate and a fade on the fast spatial spring, `@starting-style` giving both a
- * start. No state icon: M3 says to avoid one in a snackbar (ACT-20). The live region is the host
- * itself, in the page before any message is, never the snackbar that comes and goes (ACT-02);
+ * start. No state icon: M3 says to avoid one in a snackbar. The live region is the host
+ * itself, in the page before any message is, never the snackbar that comes and goes;
  * resources/js/snackbar.js queues, times and dismisses a toast, including on Escape while it
- * holds the focus and on Alt+G, which moves the focus to one carrying an action (ACT-34).
+ * holds the focus and on Alt+G, which moves the focus to one carrying an action.
  */
 
 @layer material.reset, material.tokens, material.base, material.layout, material.components, material.text, material.visibility;