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/kbd.wrn

@@ -3,8 +3,8 @@ page KbdDetail {
   layout = "showcase"
   state playground_size = ctx.url.searchParams.get("pg_size") ?? "default"
   state playground_color = ctx.url.searchParams.get("pg_color") ?? "primary"
-  state playground_label = ctx.url.searchParams.get("pg_label") ?? "Kbd"
-  state playground_class = ctx.url.searchParams.get("pg_class") ?? "showcase-instance showcase-instance--1"
+  state playground_label = ctx.url.searchParams.get("pg_label") ?? "⌘ K"
+  state playground_class = ctx.url.searchParams.get("pg_class") ?? ""
   seo {
     title = "Kbd"
     description = "Theme-aware, responsive kbd component."
@@ -31,15 +31,15 @@ page KbdDetail {
           <section class="playground-code" aria-label="Current component code">
             <header><span><span class="icon-[lucide--code-2] size-4" aria-hidden="true"></span>Component code</span><button type="button" data-playground-copy><span class="icon-[lucide--copy] size-4" aria-hidden="true"></span>Copy</button></header>
             <pre><code data-playground-code>&lt;Kbd
-  label="Kbd"
+  label="⌘ K"
 /&gt;</code></pre>
           </section>
           <div class="playground-status" data-playground-status aria-live="polite"></div>
-
+          
         </div>
         <form class="playground-controls" data-playground-form>
           <header><div><span>Component props</span><strong>4 controls</strong></div><button type="reset"><span class="icon-[lucide--rotate-ccw] size-4" aria-hidden="true"></span>Reset</button></header>
-          <div class="playground-fields"><label class="playground-field" for="playground-kbd-size"><span><strong>size</strong><small>string</small></span><select id="playground-kbd-size" name="pg_size"><option value="default" selected>default</option><option value="xs">xs</option><option value="sm">sm</option><option value="md">md</option><option value="lg">lg</option><option value="xl">xl</option><option value="icon">icon</option><option value="icon-xs">icon-xs</option><option value="icon-sm">icon-sm</option><option value="icon-lg">icon-lg</option></select></label><label class="playground-field" for="playground-kbd-color"><span><strong>color</strong><small>string</small></span><select id="playground-kbd-color" name="pg_color"><option value="primary" selected>primary</option><option value="secondary">secondary</option><option value="success">success</option><option value="warning">warning</option><option value="danger">danger</option><option value="info">info</option></select></label><label class="playground-field" for="playground-kbd-label"><span><strong>label</strong><small>string</small></span><input id="playground-kbd-label" name="pg_label" type="text" value="Kbd" /></label><label class="playground-field" for="playground-kbd-class"><span><strong>class</strong><small>string</small></span><input id="playground-kbd-class" name="pg_class" type="text" value="showcase-instance showcase-instance--1" /></label></div>
+          <div class="playground-fields"><label class="playground-field" for="playground-kbd-size"><span><strong>size</strong><small>string</small></span><select id="playground-kbd-size" name="pg_size"><option value="default" selected>default</option><option value="xs">xs</option><option value="sm">sm</option><option value="md">md</option><option value="lg">lg</option><option value="xl">xl</option><option value="icon">icon</option><option value="icon-xs">icon-xs</option><option value="icon-sm">icon-sm</option><option value="icon-lg">icon-lg</option></select></label><label class="playground-field" for="playground-kbd-color"><span><strong>color</strong><small>string</small></span><select id="playground-kbd-color" name="pg_color"><option value="primary" selected>primary</option><option value="secondary">secondary</option><option value="success">success</option><option value="warning">warning</option><option value="danger">danger</option><option value="info">info</option></select></label><label class="playground-field" for="playground-kbd-label"><span><strong>label</strong><small>string</small></span><input id="playground-kbd-label" name="pg_label" type="text" value="⌘ K" /></label><label class="playground-field" for="playground-kbd-class"><span><strong>class</strong><small>string</small></span><input id="playground-kbd-class" name="pg_class" type="text" value="" /></label></div>
         </form>
       </div>
     </section>
@@ -54,13 +54,13 @@ page KbdDetail {
         <div class="demo-workbench">
           <div id="kbd-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"><Kbd size="default" label="Kbd" class="showcase-instance showcase-instance--1" /></div>
+            
+            <div class="demo-render"><Kbd size="default" color="primary" label="⌘ K" class="" /></div>
           </div>
           <section class="demo-code" aria-label="Production default usage">
             <header><span><span class="icon-[lucide--code-2] size-4" aria-hidden="true"></span>Component usage</span><small>.wrn</small></header>
             <pre><code>&lt;Kbd
-  label="Kbd"
+  label="⌘ K"
 /&gt;</code></pre>
           </section>
         </div>
@@ -73,14 +73,13 @@ page KbdDetail {
         <div class="demo-workbench">
           <div id="kbd-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"><Kbd size="sm" label="Compact example" class="showcase-instance showcase-instance--2" /></div>
+            
+            <div class="demo-render"><Kbd size="default" color="primary" label="Esc" class="" /></div>
           </div>
           <section class="demo-code" aria-label="Compact application usage">
             <header><span><span class="icon-[lucide--code-2] size-4" aria-hidden="true"></span>Component usage</span><small>.wrn</small></header>
             <pre><code>&lt;Kbd
-  size="sm"
-  label="Compact example"
+  label="Esc"
 /&gt;</code></pre>
           </section>
         </div>
@@ -93,19 +92,18 @@ page KbdDetail {
         <div class="demo-workbench">
           <div id="kbd-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"><Kbd size="lg" label="Advanced example" class="showcase-instance showcase-instance--3" /></div>
+            
+            <div class="demo-render"><Kbd size="default" color="primary" label="Ctrl + Enter" class="" /></div>
           </div>
           <section class="demo-code" aria-label="Rich configuration usage">
             <header><span><span class="icon-[lucide--code-2] size-4" aria-hidden="true"></span>Component usage</span><small>.wrn</small></header>
             <pre><code>&lt;Kbd
-  size="lg"
-  label="Advanced example"
+  label="Ctrl + Enter"
 /&gt;</code></pre>
           </section>
         </div>
       </article></div></section>
-
+        
         <section id="api" class="detail-section"><div class="detail-section-heading"><span>Component API</span><h2>Props and configuration</h2><p>All content and behavior shown above is supplied through these props and slots.</p></div><div class="docs-table-wrap"><table class="docs-table"><thead><tr><th>Prop</th><th>Type</th><th>Default</th><th>Required</th></tr></thead><tbody><tr><td><code>size</code></td><td>string</td><td><code>"default"</code></td><td>No</td></tr><tr><td><code>color</code></td><td>string</td><td><code>"primary"</code></td><td>No</td></tr><tr><td><code>label</code></td><td>string</td><td><code>"K"</code></td><td>No</td></tr><tr><td><code>class</code></td><td>string</td><td><code>""</code></td><td>No</td></tr></tbody></table></div></section>
       </main>
       <aside class="detail-aside">