feat: MakerWorld Debug-Screenshot + bessere Fehlerdiagnose bei fehlgeschlagenem Abruf

frontend/src/tools/statistik.jsx

@@ -214,6 +214,9 @@ function MakerworldTab({ toast }) {
   const [savingCookie, setSavingCookie] = useState(false);
   const [showCookieFallback, setShowCookieFallback] = useState(false);
 
+  const [debugImgUrl, setDebugImgUrl] = useState(null);
+  const [loadingScreenshot, setLoadingScreenshot] = useState(false);
+
   const load = () => {
     setLoading(true);
     api('/tools/makerworld/stats').then(setState).catch(()=>{}).finally(()=>setLoading(false));
@@ -268,6 +271,20 @@ function MakerworldTab({ toast }) {
     } catch(e) { toast?.(e.message,'error'); }
   };
 
+  const viewDebugScreenshot = async () => {
+    setLoadingScreenshot(true);
+    try {
+      const token = localStorage.getItem('sk_token');
+      const res = await fetch('/api/tools/makerworld/debug-screenshot', {
+        headers: token ? { 'Authorization': 'Bearer '+token } : {},
+      });
+      if (!res.ok) { toast?.('Kein Debug-Screenshot vorhanden','error'); return; }
+      const blob = await res.blob();
+      setDebugImgUrl(URL.createObjectURL(blob));
+    } catch(e) { toast?.(e.message,'error'); }
+    finally { setLoadingScreenshot(false); }
+  };
+
   const submitCode = async () => {
     if (!codeInput.trim()) return;
     setSubmittingCode(true);
@@ -393,11 +410,20 @@ function MakerworldTab({ toast }) {
         </div>
       )}
 
-      {state?.error && d && (
+      {state?.error && (
         <div style={{...S.card,borderColor:'rgba(248,113,113,0.3)',background:'rgba(248,113,113,0.06)'}}>
-          <div style={{color:'#f87171',fontFamily:'monospace',fontSize:11}}>
-            ⚠ Letzter Abruf fehlgeschlagen ({state.error}) — zeige zuletzt bekannten Stand.
+          <div style={{color:'#f87171',fontFamily:'monospace',fontSize:11,marginBottom:8}}>
+            ⚠ {state.error}{d ? ' — zeige zuletzt bekannten Stand.' : ''}
           </div>
+          <button onClick={viewDebugScreenshot} disabled={loadingScreenshot}
+            style={{...S.btn('#888888'),opacity:loadingScreenshot?0.5:1}}>
+            {loadingScreenshot?'…':'🖼 Debug-Screenshot ansehen'}
+          </button>
+          {debugImgUrl && (
+            <div style={{marginTop:10}}>
+              <img src={debugImgUrl} alt="Debug-Screenshot" style={{width:'100%',borderRadius:8,border:'1px solid rgba(255,255,255,0.1)'}}/>
+            </div>
+          )}
         </div>
       )}