diff --git a/frontend/src/calendar.jsx b/frontend/src/calendar.jsx
index 84c8be3..aebc194 100644
--- a/frontend/src/calendar.jsx
+++ b/frontend/src/calendar.jsx
@@ -93,31 +93,41 @@ export default function CalendarWidget() {
   const [selected, setSelected] = useState(null); // date object
 
   const [errors, setErrors] = useState([]);
+  const [debug,  setDebug]  = useState([]);
 
   // Load all feeds
   const loadFeeds = async (feedList) => {
-    if (!feedList.length) { setEvents([]); return; }
+    if (!feedList.length) { setEvents([]); setDebug(['Keine Feeds konfiguriert']); return; }
     setLoading(true);
     setErrors([]);
     const all = [];
     const errs = [];
+    const dbg = [];
+    dbg.push(`Feeds: ${feedList.length}`);
     for (const f of feedList) {
       try {
+        dbg.push(`Lade: ${f.name} (${f.url.slice(0,50)}…)`);
         const res = await fetch(`/api/calendar/fetch?url=${encodeURIComponent(f.url)}`, {
           headers: { Authorization: `Bearer ${localStorage.getItem('sk_token')}` }
         });
+        dbg.push(`HTTP: ${res.status}`);
         if (res.ok) {
           const text = await res.text();
+          dbg.push(`Bytes: ${text.length}, VCALENDAR: ${text.includes('BEGIN:VCALENDAR')}, VEVENTs: ${(text.match(/BEGIN:VEVENT/g)||[]).length}`);
           const evs  = parseIcal(text).map(e => ({ ...e, color: f.color, feedName: f.name }));
+          dbg.push(`Geparst: ${evs.length} Termine`);
+          if (evs.length > 0) dbg.push(`Erstes: ${evs[0].summary} @ ${evs[0].dtstart}`);
           all.push(...evs);
         } else {
           const d = await res.json().catch(()=>({error:'Unbekannter Fehler'}));
           errs.push(`${f.name}: ${d.error}`);
+          dbg.push(`Fehler: ${d.error}`);
         }
-      } catch(e) { errs.push(`${f.name}: ${e.message}`); }
+      } catch(e) { errs.push(`${f.name}: ${e.message}`); dbg.push(`Exception: ${e.message}`); }
     }
     setEvents(all);
     setErrors(errs);
+    setDebug(dbg);
     setLoading(false);
   };
 
@@ -258,6 +268,17 @@ export default function CalendarWidget() {
               Noch keine Kalender abonniert. Füge Kalender in den Einstellungen hinzu.
             </div>
           )}
+
+          {/* Debug Panel */}
+          {debug.length > 0 && (
+            <div style={{ marginTop:10, background:'rgba(0,0,0,0.4)', borderRadius:8,
+              padding:'8px 10px', border:'1px solid rgba(255,255,255,0.08)' }}>
+              <div style={{ color:'rgba(255,255,255,0.3)', fontFamily:'monospace', fontSize:9, marginBottom:4 }}>DEBUG</div>
+              {debug.map((d,i) => (
+                <div key={i} style={{ color:'rgba(255,255,255,0.55)', fontFamily:'monospace', fontSize:10, lineHeight:1.6 }}>{d}</div>
+              ))}
+            </div>
+          )}
         </div>
       )}
     </div>