fix: KöPi - Bilder mit korrekten sec-fetch Headers laden

backend/src/tools/koepi/routes.js

@@ -95,19 +95,37 @@ async function scrapeMarktguru() {
       });
     });
 
-    // Bilder: separaten Tab öffnen pro Bild-URL und screenshotten
-    const imgPage = await browser.newPage();
-    await imgPage.setViewport({ width: 300, height: 300 });
+    // Bilder via Node https mit exakten Browser-Headers laden
+    const nodeHttps = require('https');
     for (let i = 0; i < offers.length; i++) {
       const url = offers[i].image;
       if (!url || !url.startsWith('https://')) continue;
-      try {
-        await imgPage.goto(url, { waitUntil: 'networkidle0', timeout: 10000 });
-        const b64 = await imgPage.screenshot({ encoding: 'base64' });
-        offers[i].image = b64 ? `data:image/png;base64,${b64}` : null;
-      } catch { offers[i].image = null; }
+      offers[i].image = await new Promise(resolve => {
+        const req = nodeHttps.get(url, {
+          headers: {
+            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
+            'Accept': 'image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8',
+            'Accept-Language': 'de-DE,de;q=0.9',
+            'Referer': 'https://www.marktguru.de/',
+            'Origin': 'https://www.marktguru.de',
+            'sec-fetch-dest': 'image',
+            'sec-fetch-mode': 'no-cors',
+            'sec-fetch-site': 'cross-site',
+          }
+        }, res => {
+          if (res.statusCode !== 200) return resolve(null);
+          const chunks = [];
+          res.on('data', c => chunks.push(c));
+          res.on('end', () => {
+            const b64 = Buffer.concat(chunks).toString('base64');
+            const mime = res.headers['content-type'] || 'image/webp';
+            resolve(`data:${mime};base64,${b64}`);
+          });
+        });
+        req.on('error', () => resolve(null));
+        req.setTimeout(8000, () => { req.destroy(); resolve(null); });
+      });
     }
-    await imgPage.close();
 
     // Filtern auf Ziel-Händler + nur König Pilsener
     const filtered = offers.filter(o => {