feat(webui): remove menubar Channel item; brand acts as channel selector only on dashboard; hover to open; commit text toned down

internal/httpapi/static/app.css

@@ -1,7 +1,7 @@
 html, body { height: 100%; }
 body { padding: 0; min-height: 100vh; }
 header.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: .6rem 1rem; border-bottom: 1px solid var(--muted-border-color); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; background-color: var(--pico-background-color, #fff); }
-header.nav .brand { justify-self: start; }
+header.nav .brand { justify-self: start; cursor: pointer; }
 header.nav .commit { justify-self: center; font-size: .7rem; opacity: .55; }
 header.nav nav { justify-self: end; }
 main, article, .dash { margin-top: var(--headerH, 56px); margin-bottom: var(--footerH, 44px); }

internal/httpapi/static/app.js

@@ -76,6 +76,12 @@ window.addEventListener('DOMContentLoaded', ()=>{
   if('scrollRestoration' in history){ history.scrollRestoration = 'manual'; }
   measureBars();
   loadChannels();
+  // Open brand dropdown on hover (desktop) for the dashboard
+  const brandDetails = document.getElementById('brand-chans');
+  if(brandDetails){
+    brandDetails.addEventListener('mouseenter', ()=>{ brandDetails.setAttribute('open',''); });
+    brandDetails.addEventListener('mouseleave', ()=>{ brandDetails.removeAttribute('open'); });
+  }
   if(document.getElementById('channel')){
     fetch('/api/channels').then(r=>r.json()).then(arr=>{ const sel=document.getElementById('channel'); arr.forEach(c=>{ const o=document.createElement('option'); o.value=c; o.textContent=c; sel.appendChild(o); }); }).catch(()=>{});
   }

internal/httpapi/templates/layout.tmpl

@@ -24,12 +24,6 @@
     <div class="commit">{{ .CommitShort }}</div>
     <nav>
       <ul>
-        <li class="chan">
-          <details role="list">
-            <summary aria-haspopup="listbox">Channel</summary>
-            <ul id="nav-chans" role="listbox"></ul>
-          </details>
-        </li>
         <li><a href="/summarizer">Summarizer</a></li>
         <li><a href="/logout">Logout</a></li>
       </ul>