style(header): remove logo subtitle and center instance title next to icon

frontend/index.html

@@ -12,7 +12,7 @@
     <link rel="manifest" href="/manifest.json" />
     <link rel="icon" type="image/svg+xml" href="/icon.svg" />
     <link rel="apple-touch-icon" href="/icon.svg" />
-    <title>MindSift — Der Kopf frei in drei Sekunden</title>
+    <title>MindSift</title>
     <script>
       window.__deferredPwaPrompt = null;
       window.addEventListener('beforeinstallprompt', function (e) {

frontend/src/App.tsx

@@ -484,14 +484,9 @@ export const App: React.FC = () => {
             <div className="w-7 h-7 bg-accent text-on-accent rounded-btn flex items-center justify-center">
               <Brain className="w-4 h-4" />
             </div>
-            <div className="flex flex-col">
-              <span className="font-bold text-sm sm:text-base text-main tracking-tight leading-none">
-                {authStatus.instanceName || 'MindSift'}
-              </span>
-              <span className="text-[11px] text-muted mt-0.5 hidden sm:inline-block">
-                Der Kopf frei in drei Sekunden
-              </span>
-            </div>
+            <span className="font-bold text-sm sm:text-base text-main tracking-tight leading-none">
+              {authStatus.instanceName || 'MindSift'}
+            </span>
           </div>
 
           {/* Quick-Capture Input Bubble directly in Header (above Tabs) */}

frontend/src/features/auth/SetupAndAuthView.tsx

@@ -356,12 +356,9 @@ export const SetupAndAuthView: React.FC<SetupAndAuthViewProps> = ({
             <div className="w-7 h-7 bg-accent text-on-accent rounded-btn flex items-center justify-center">
               <Brain className="w-4 h-4" />
             </div>
-            <div>
-              <h1 className="text-sm font-bold text-main tracking-tight leading-none">
-                {authStatus.instanceName || 'MindSift'}
-              </h1>
-              <p className="text-[11px] text-muted mt-0.5">Der Kopf frei in drei Sekunden</p>
-            </div>
+            <h1 className="text-sm font-bold text-main tracking-tight leading-none">
+              {authStatus.instanceName || 'MindSift'}
+            </h1>
           </div>
           <Lock className="w-4 h-4 text-faint" />
         </div>