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/search-box.wrn

@@ -64,7 +64,7 @@ page SearchBoxDetail {
         <div class="demo-workbench">
           <div id="search-box-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"><SearchBox size="default" label="Search documentation" name="site-search" value="sample-1" placeholder="Search components and guides" type="search" disabled="false" required="false" class="showcase-instance showcase-instance--1" /></div>
           </div>
           <section class="demo-code" aria-label="Site search usage">
@@ -86,7 +86,7 @@ page SearchBoxDetail {
         <div class="demo-workbench">
           <div id="search-box-demo-2" class="demo-canvas demo-canvas--2">
             <div class="demo-browser-chrome"><span></span><span></span><span></span><small>Live preview</small></div>
-
+            
             <div class="demo-render"><SearchBox size="sm" label="Search stations" name="station-search" value="sample-2" placeholder="Name, district, or jurisdiction" disabled="false" required="false" class="showcase-instance showcase-instance--2" /></div>
           </div>
           <section class="demo-code" aria-label="Compact directory search usage">
@@ -109,7 +109,7 @@ page SearchBoxDetail {
         <div class="demo-workbench">
           <div id="search-box-demo-3" class="demo-canvas demo-canvas--3">
             <div class="demo-browser-chrome"><span></span><span></span><span></span><small>Live preview</small></div>
-
+            
             <div class="demo-render"><SearchBox size="lg" color="info" label="Complaint reference" name="complaint-reference" value="sample-3" placeholder="Enter reference number" disabled="false" required="true" class="showcase-instance showcase-instance--3" /></div>
           </div>
           <section class="demo-code" aria-label="Required service lookup usage">