fix: update CSV import to correctly decode Windows-1252 encoding for venue names

backend/services/matchService.js

@@ -72,9 +72,12 @@ class MatchService {
     async importCSV(userToken, clubId, filePath) { 
         await checkAccess(userToken, clubId); 
         let seasonString = '';
+        const matches = [];
         try { 
             const fileStream = fs.createReadStream(filePath)
-                .pipe(iconv.decodeStream('utf8'))
+                // click-TT exports this file as Windows-1252 / ISO-8859-1.
+                // Decoding it as UTF-8 corrupts umlauts in venue names and addresses.
+                .pipe(iconv.decodeStream('win1252'))
                 .pipe(csv({ separator: ';' }));
             for await (const row of fileStream) {
                 const parsedDate = parse(row['Termin'], 'dd.MM.yyyy HH:mm', new Date());