Panel: pulsing dot on Update when a new server version is available

The dot replaces the small 'new' badge; the first update check now starts as
soon as the panel asks for the update status instead of 60 s after start.

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

Panel/app.css

@@ -292,3 +292,10 @@ input[type=file]::file-selector-button { background: var(--panel); color: var(--
   .us-steps li { font-size: 11px; }
 }
 @media (prefers-reduced-motion: reduce) { .us-fill, .us-steps li.active .us-dot, .update-overlay { animation: none; } }
+
+/* Punkt an "Update", wenn eine neue Server-Version da ist */
+nav button { position: relative; }
+.nav-dot { margin-left: auto; width: 9px; height: 9px; flex: none; border-radius: 50%; background: var(--accent);
+  box-shadow: 0 0 0 3px rgba(242, 107, 29, .22); animation: nav-dot-pulse 1.8s ease-in-out infinite; }
+@keyframes nav-dot-pulse { 50% { box-shadow: 0 0 0 6px rgba(242, 107, 29, .08); } }
+@media (prefers-reduced-motion: reduce) { .nav-dot { animation: none; } }

Panel/app.js

@@ -185,7 +185,7 @@ function renderNav() {
     if (p.group !== group) { group = p.group; items.push(h("div", { class: "nav-group" }, group)); }
     items.push(h("button", { type: "button", class: p.id === state.page ? "active" : "", onclick: () => go(p.id) },
       h("span", { class: "ico" }, p.icon), h("span", { class: "nav-label" }, p.label),
-      p.id === "update" && state.updateAvailable ? h("span", { class: "nav-badge", title: "Update available" }, "new") : null));
+      p.id === "update" && state.updateAvailable ? h("span", { class: "nav-dot", title: "Update available", "aria-label": "Update available" }) : null));
   }
   nav.replaceChildren(...items);
   $("meButton").classList.toggle("active", state.page === "account");

Updater.cs

@@ -132,8 +132,16 @@ public sealed class Updater
         });
     }
 
+    bool firstCheckStarted;
+
     public object Status()
     {
+        // Noch nie geprüft (gerade erst gestartet): jetzt im Hintergrund prüfen, damit das Panel den Punkt bald zeigt
+        if (lastCheckUtc == null && !firstCheckStarted)
+        {
+            firstCheckStarted = true;
+            _ = Task.Run(async () => { try { await CheckAsync(); } catch { } });
+        }
         lock (gate)
         {
             var sdkInfo = sdk;