fix: unify responsive design across documentation portal

app/pages/packages/router.wrn

@@ -9,9 +9,8 @@ page wrnexusrouter {
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       <aside class="sidebar"><a href="/packages">← All packages</a><span class="category">Core</span><h2>@wrnexus/router</h2><p>Filesystem discovery, route matching, and typed route generation.</p><span class="status status-beta">Private preview · 0.2.15</span><nav><a href="#access">Access</a><a href="#guide">Guide</a><a href="#api">Complete API</a></nav></aside>
@@ -19,7 +18,6 @@ page wrnexusrouter {
 <p>Part of the <strong>WRNexusJS</strong> framework — an SSR-first, Bun-native full-stack web framework.</p>
 <h3 id="overview">Overview</h3>
 <p><code>@wrnexus/router</code> scans an application's <code>app/</code> directory once at startup and builds route tables for pages, API endpoints, realtime channels, middleware, server-rendered <code>.wrn</code> components, layouts, and validation schemas. It also compiles URL patterns (<code>/users/[id]</code>) into RegExps and matches request paths against them. Request input is never turned into a file path, which makes the router immune to path traversal. This is a server-side package used by the WRNexusJS runtime to resolve incoming requests, plus a codegen helper for compile-time typed links.</p>
-<h3 id="installation">Installation</h3>
 <pre data-language="bash"><code>bun add @wrnexus/router</code></pre>
 <blockquote>Private package — the machine must be authenticated to the <code>wrnexus</code> npm org</blockquote>
 <blockquote>(a read token in <code>~/.npmrc</code>). Requires <strong>Bun</strong> (Node is not supported).</blockquote>
@@ -260,7 +258,7 @@ interface ComponentRef &#123;
   /** Absolute path to the component's `.wrn` module. */
   file: string;
 &#125;</code></pre></article></div></section></article>
-      <aside class="on-this-page"><h2>On this page</h2><nav><a class="toc-level-2" href="#guide">Guide</a><a class="toc-level-3" href="#overview">Overview</a><a class="toc-level-3" href="#installation">Installation</a><a class="toc-level-3" href="#directory-conventions">Directory conventions</a><a class="toc-level-3" href="#api">API</a><a class="toc-level-4" href="#buildrouter-appdir-opts-router">buildRouter(appDir, opts?): Router</a><a class="toc-level-4" href="#route-matching">Route matching</a><a class="toc-level-4" href="#typed-routes-codegen">Typed-routes codegen</a><a class="toc-level-4" href="#re-exports">Re-exports</a><a class="toc-level-3" href="#usage">Usage</a><a class="toc-level-3" href="#requirements-notes">Requirements / Notes</a><a class="toc-level-2" href="#api">Complete API</a><a class="toc-level-2" href="#examples">Examples</a></nav></aside>
+      <aside class="on-this-page"><h2>On this page</h2><nav><a class="toc-level-2" href="#guide">Guide</a><a class="toc-level-3" href="#overview">Overview</a><a class="toc-level-3" href="#directory-conventions">Directory conventions</a><a class="toc-level-3" href="#api">API</a><a class="toc-level-4" href="#buildrouter-appdir-opts-router">buildRouter(appDir, opts?): Router</a><a class="toc-level-4" href="#route-matching">Route matching</a><a class="toc-level-4" href="#typed-routes-codegen">Typed-routes codegen</a><a class="toc-level-4" href="#re-exports">Re-exports</a><a class="toc-level-3" href="#usage">Usage</a><a class="toc-level-3" href="#requirements-notes">Requirements / Notes</a><a class="toc-level-2" href="#api">Complete API</a><a class="toc-level-2" href="#examples">Examples</a></nav></aside>
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