fix: KöPi - Bilder via Puppeteer Element-Screenshot

backend/src/tools/koepi/routes.js

@@ -89,34 +89,20 @@ async function scrapeMarktguru() {
       });
     });
 
-    // Bilder alle auf einmal im Browser-Kontext laden (hat Zugriff auf CDN)
-    const imageUrls = offers.map(o => o.image).filter(Boolean);
-    if (imageUrls.length > 0) {
-      const b64Images = await page.evaluate(async (urls) => {
-        const results = {};
-        await Promise.all(urls.map(async url => {
-          try {
-            const resp = await fetch(url);
-            if (!resp.ok) { results[url] = null; return; }
-            const blob = await resp.blob();
-            results[url] = await new Promise(res => {
-              const r = new FileReader();
-              r.onloadend = () => res(r.result);
-              r.onerror = () => res(null);
-              r.readAsDataURL(blob);
-            });
-          } catch { results[url] = null; }
-        }));
-        return results;
-      }, imageUrls);
-
-      for (const offer of offers) {
-        if (offer.image && b64Images[offer.image]) {
-          offer.image = b64Images[offer.image];
-        } else {
-          offer.image = null;
-        }
-      }
+    // Bilder via Puppeteer screenshot der img-Elemente
+    const imgElements = await page.$$('img.offer-list-item-img');
+    for (let i = 0; i < offers.length; i++) {
+      if (!offers[i].image || !imgElements[i]) continue;
+      try {
+        // Warte bis Bild geladen
+        await page.evaluate(el => new Promise(res => {
+          if (el.complete) return res();
+          el.onload = res; el.onerror = res;
+          setTimeout(res, 3000);
+        }), imgElements[i]);
+        const b64 = await imgElements[i].screenshot({ encoding: 'base64' });
+        offers[i].image = b64 ? `data:image/png;base64,${b64}` : null;
+      } catch { offers[i].image = null; }
     }
 
     // Filtern auf Ziel-Händler + nur König Pilsener