fix: xREL Sonderzeichen im Titel entfernen, leere Ergebnisse nur 30min cachen, Cache-Clear Endpoint

backend/src/tools/media/routes.js

@@ -118,14 +118,30 @@ function enrichMovie(movie, genreMap, fsk, rank) {
 // Jeder Eintrag hat ext_info.title für exakten Match + main_lang für German-Filter
 // Das spart den ext_info_id Lookup komplett
 
+// Sonderzeichen aus Suchtitel entfernen die xREL verwirren
+function cleanTitle(t) {
+  return (t || '').replace(/[*#@!?]/g, '').replace(/\s+/g, ' ').trim();
+}
+
 async function xrelSearchGerman(title, originalTitle) {
-  const cacheKey = `xrel:${originalTitle || title}`.toLowerCase();
+  const cleanOrig  = cleanTitle(originalTitle);
+  const cleanTitle_ = cleanTitle(title);
+  const cacheKey = `xrel:${cleanOrig || cleanTitle_}`.toLowerCase();
   const cached = dbCacheGet(cacheKey);
   if (cached !== undefined) return cached;
 
-  const queries = [originalTitle, title].filter(Boolean)
+  // Queries: original ohne Sonderzeichen, dann deutsch, dann ohne Artikel
+  const rawQueries = [cleanOrig, cleanTitle_]
+    .filter(Boolean)
     .filter((v, i, a) => a.indexOf(v) === i);
 
+  // Zusätzlich: deutschen Artikel entfernen (Der/Die/Das am Anfang)
+  const extraQueries = rawQueries
+    .map(q => q.replace(/^(Der|Die|Das|Ein|Eine)\s+/i, '').trim())
+    .filter(q => q && !rawQueries.includes(q));
+
+  const queries = [...rawQueries, ...extraQueries];
+
   const results = [];
   const seen = new Set();
 
@@ -182,7 +198,13 @@ async function xrelSearchGerman(title, originalTitle) {
   }
 
   results.sort((a, b) => (b.date || '').localeCompare(a.date || ''));
+  // Leere Ergebnisse nur kurz cachen (30 Min) damit xREL später nochmal gefragt wird
+  if (results.length > 0) {
     dbCacheSet(cacheKey, results);
+  } else {
+    db.prepare('INSERT OR REPLACE INTO xrel_cache (cache_key, value, expires_at) VALUES (?,?,?)')
+      .run(cacheKey, '[]', Date.now() + 30 * 60 * 1000);
+  }
   return results;
 }
 
@@ -301,4 +323,10 @@ router.put('/settings', authenticate, requireAdmin, (req, res) => {
   res.json({ ok: true });
 });
 
+// DELETE /api/tools/media/xrel-cache – Cache leeren (Admin)
+router.delete('/xrel-cache', authenticate, requireAdmin, (req, res) => {
+  const info = db.prepare('DELETE FROM xrel_cache').run();
+  res.json({ deleted: info.changes });
+});
+
 module.exports = router;