feat: sync showcase with WRNexusJS 0.8.72 and @wrnexus/ui 0.8.88

- Sync app, public, scripts, test and examples from the framework's
  component-showcase: redesigned component demos, marketing blocks under
  /blocks, template and preview galleries, distinct Timeline/Section
  variants, Chat Bubble receipts, a top-placement Drawer demo, and the
  playground code panel fix (objects in array props no longer blank out).
- Standalone adaptations kept: the generator and tests read
  component-reference.json from the published @wrnexus/ui, and tests use
  the published @wrnexus/compiler and @wrnexus/syntax.
- Dependencies: every @wrnexus/* package to its latest release (ui 0.8.88,
  styles 0.8.26, core 0.8.16, cli 0.8.72, ...), happy-dom for the
  playground tests, Tailwind 4.3; bun.lock and package-lock.json refreshed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/pages/components/toaster.wrn

@@ -65,7 +65,7 @@ page ToasterDetail {
         <div class="demo-workbench">
           <div id="toaster-demo-1" class="demo-canvas demo-canvas--1">
             <div class="demo-browser-chrome"><span></span><span></span><span></span><small>Live preview</small></div>
-
+            
             <div class="demo-render"><div class="showcase-toast-demo"><button type="button" @click='toast.success("Your changes are live", { title: "Published" })'>success</button><button type="button" @click='toast.error("We could not reach the server", { title: "Network error" })'>danger</button><button type="button" @click='toast.warning("Your trial ends in 3 days", { title: "Heads up", icon: "icon-[lucide--hourglass]" })'>warning + custom icon</button><button type="button" @click='toast.info("Export queued")'>info</button><button type="button" @click='toast("Note deleted", { title: "Deleted", actionLabel: "Undo" })'>one action</button><button type="button" @click='toast.warning("This file changed elsewhere", { title: "Conflict", duration: 0, actions: [{ label: "Keep mine" }, { label: "Discard", tone: "danger" }] })'>two actions (sticky)</button><button type="button" @click='toast("No icon on this one", { icon: false })'>icon suppressed</button><button type="button" @click='toast.success("Gone in 1.5s", { duration: 1500 })'>short duration</button><button type="button" @click='toast.clear()'>clear all</button></div><Toaster size="default" position="bottom-right" duration="4500" max="4" pauseOnHover="true" showIcon="true" closable="true" showProgress="true" closeLabel="Toaster" class="showcase-instance showcase-instance--1" /></div>
           </div>
           <section class="demo-code" aria-label="Raise notifications from anywhere usage">