diff --git a/frontend/src/calendar.jsx b/frontend/src/calendar.jsx
index d77b041..02c9c87 100644
--- a/frontend/src/calendar.jsx
+++ b/frontend/src/calendar.jsx
@@ -92,11 +92,15 @@ export default function CalendarWidget() {
   const [loading, setLoading] = useState(false);
   const [selected, setSelected] = useState(null); // date object
 
+  const [errors, setErrors] = useState([]);
+
   // Load all feeds
   const loadFeeds = async (feedList) => {
     if (!feedList.length) { setEvents([]); return; }
     setLoading(true);
+    setErrors([]);
     const all = [];
+    const errs = [];
     for (const f of feedList) {
       try {
         const res = await fetch(`/api/calendar/fetch?url=${encodeURIComponent(f.url)}`, {
@@ -106,14 +110,18 @@ export default function CalendarWidget() {
           const text = await res.text();
           const evs  = parseIcal(text).map(e => ({ ...e, color: f.color, feedName: f.name }));
           all.push(...evs);
+        } else {
+          const d = await res.json().catch(()=>({error:'Unbekannter Fehler'}));
+          errs.push(`${f.name}: ${d.error}`);
         }
-      } catch {}
+      } catch(e) { errs.push(`${f.name}: ${e.message}`); }
     }
     setEvents(all);
+    setErrors(errs);
     setLoading(false);
   };
 
-  useEffect(() => { if (isOpen) loadFeeds(feeds); }, [isOpen]);
+  useEffect(() => { if (isOpen && feeds.length > 0) loadFeeds(feeds); }, [isOpen]);
 
   // Calendar grid
   const days = useMemo(() => {
@@ -135,15 +143,37 @@ export default function CalendarWidget() {
   return (
     <div style={{ ...S.card, marginBottom:10 }}>
       {/* Header */}
-      <button onClick={()=>setIsOpen(v=>!v)} style={{ width:'100%', background:'transparent', border:'none',
-        display:'flex', justifyContent:'space-between', alignItems:'center', cursor:'pointer', padding:0 }}>
-        <div style={S.head}>KALENDER{loading?' …':''}</div>
-        <span style={{ color:'rgba(255,255,255,0.4)', fontSize:11, display:'inline-block',
-          transform:isOpen?'rotate(90deg)':'rotate(0)', transition:'transform 0.2s' }}>▶</span>
-      </button>
+      <div style={{ display:'flex', justifyContent:'space-between', alignItems:'center' }}>
+        <button onClick={()=>setIsOpen(v=>!v)} style={{ flex:1, background:'transparent', border:'none',
+          display:'flex', justifyContent:'space-between', alignItems:'center', cursor:'pointer', padding:0 }}>
+          <div style={S.head}>KALENDER</div>
+          <span style={{ color:'rgba(255,255,255,0.4)', fontSize:11, display:'inline-block',
+            transform:isOpen?'rotate(90deg)':'rotate(0)', transition:'transform 0.2s' }}>▶</span>
+        </button>
+        {isOpen && feeds.length > 0 && (
+          <button onClick={()=>loadFeeds(feeds)} disabled={loading}
+            style={{ background:'transparent', border:'none', color:'rgba(255,255,255,0.4)',
+              cursor:'pointer', fontSize:13, padding:'0 0 0 8px', marginLeft:8 }}
+            title="Neu laden">
+            {loading ? '⏳' : '↻'}
+          </button>
+        )}
+      </div>
 
       {isOpen && (
         <div style={{ marginTop:12 }}>
+          {/* Fehler */}
+          {errors.length > 0 && (
+            <div style={{ marginBottom:10 }}>
+              {errors.map((e,i) => (
+                <div key={i} style={{ color:'#ff6b9d', fontFamily:'monospace', fontSize:10,
+                  background:'rgba(255,107,157,0.08)', borderRadius:6, padding:'4px 8px', marginBottom:3 }}>
+                  ✕ {e}
+                </div>
+              ))}
+            </div>
+          )}
+
           {/* Monat Nav */}
           <div style={{ display:'flex', justifyContent:'space-between', alignItems:'center', marginBottom:10 }}>
             <button onClick={prevMonth} style={{ background:'transparent', border:'none', color:'rgba(255,255,255,0.5)',