fix: Wayback-Suche via Backend-Proxy, Clipboard-Button entfernt

backend/src/tools/paywallkiller/routes.js

@@ -229,4 +229,35 @@ router.post('/pdf', authenticate, async (req, res) => {
   }
 });
 
+
+// ── GET /api/tools/paywallkiller/wayback?url=... ──────────────────────────
+// Proxyt die Wayback CDX API – umgeht CORS/CSP Probleme im Browser
+router.get('/wayback', authenticate, async (req, res) => {
+  const { url } = req.query;
+  if (!url || typeof url !== 'string') return res.status(400).json({ error: 'url Parameter fehlt' });
+
+  let targetUrl = url.trim();
+  if (!targetUrl.startsWith('http')) targetUrl = 'https://' + targetUrl;
+
+  const cdxUrl = `https://web.archive.org/cdx/search/cdx?url=${encodeURIComponent(targetUrl)}&output=json&limit=1&fl=timestamp&filter=statuscode:200&fastLatest=true`;
+
+  try {
+    const result = await fetchPage(cdxUrl);
+    if (result.statusCode !== 200) {
+      return res.status(502).json({ error: `Wayback API Fehler: ${result.statusCode}` });
+    }
+    let data;
+    try { data = JSON.parse(result.body); } catch { return res.status(502).json({ error: 'Ungültige Wayback-Antwort' }); }
+
+    // data = [["timestamp"],["20260608201434"]] oder [] wenn nichts gefunden
+    if (!Array.isArray(data) || data.length < 2 || !data[1]?.[0]) {
+      return res.json({ found: false });
+    }
+    const timestamp = data[1][0];
+    return res.json({ found: true, waybackUrl: `https://web.archive.org/web/${timestamp}/${targetUrl}` });
+  } catch (err) {
+    return res.status(500).json({ error: 'Fehler: ' + err.message });
+  }
+});
+
 module.exports = router;