Fix QuickLinkIcon: Favicon immer aus URL ableiten wenn kein gespeichertes Icon, Fallback auf Emoji

frontend/src/App.jsx

@@ -453,15 +453,31 @@ function QuickLinksCarousel({ links }) {
 }
 
 function QuickLinkIcon({ l }) {
+  const [imgOk, setImgOk] = useState(true);
+
+  // Favicon-URL bauen: gespeicherten Wert nehmen oder aus URL ableiten
+  const faviconUrl = (() => {
+    if (l.icon && l.icon.startsWith('http')) return l.icon;
+    try {
+      const host = new URL(l.url).hostname;
+      return `https://www.google.com/s2/favicons?sz=64&domain=${host}`;
+    } catch { return null; }
+  })();
+
+  const showEmoji = !faviconUrl || !imgOk;
+  const fallbackEmoji = l.icon && !l.icon.startsWith('http') ? l.icon : '🔗';
+
   return (
     <a href={l.url} target="_blank" rel="noopener noreferrer"
       style={{ display:'flex', flexDirection:'column', alignItems:'center', justifyContent:'center', gap:3,
         padding:'4px 2px', background:'rgba(255,255,255,0.04)',
         border:'1px solid rgba(255,255,255,0.08)', borderRadius:10,
         textDecoration:'none', height:48, width:'100%', boxSizing:'border-box', cursor:'pointer' }}>
-      {l.icon && l.icon.startsWith('http')
-        ? <img src={l.icon} alt="" style={{width:16,height:16,objectFit:'contain'}} onError={e=>e.target.style.display='none'}/>
-        : <span style={{ fontSize:16 }}>{l.icon}</span>}
+      {!showEmoji
+        ? <img src={faviconUrl} alt="" style={{width:18,height:18,objectFit:'contain'}}
+            onError={() => setImgOk(false)}/>
+        : <span style={{ fontSize:16 }}>{fallbackEmoji}</span>
+      }
       <span style={{ color:'rgba(255,255,255,0.65)', fontSize:8, fontFamily:'monospace',
         maxWidth:52, overflow:'hidden', textOverflow:'ellipsis', whiteSpace:'nowrap' }}>{l.title}</span>
     </a>