fix upload ydk

package-lock.json

@@ -19,6 +19,7 @@
         "class-transformer": "^0.5.1",
         "class-validator": "^0.14.1",
         "crypto-random-string": "3.3.1",
+        "iconv-lite": "^0.6.3",
         "lodash": "^4.17.21",
         "nesties": "^1.1.1",
         "nestjs-mycard": "^4.0.2",

package.json

@@ -30,6 +30,7 @@
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.1",
     "crypto-random-string": "3.3.1",
+    "iconv-lite": "^0.6.3",
     "lodash": "^4.17.21",
     "nesties": "^1.1.1",
     "nestjs-mycard": "^4.0.2",

src/utility/multer-to-participant.ts

 import { Participant } from '../participant/entities/participant.entity';
 import YGOProDeck from 'ygopro-deck-encode';
+import iconv from 'iconv-lite';
 
 export const multerToParticipant = (
   multerFile: Express.Multer.File,
@@ -8,7 +9,8 @@ export const multerToParticipant = (
   const participant = new Participant();
   participant.quit = false;
   participant.seq = 1000;
-  participant.name = multerFile.originalname.replace(/(\.ydk)+$/i, '');
+  const rawName = iconv.decode(Buffer.from(multerFile.originalname, 'binary'), 'utf-8');
+  participant.name = rawName.replace(/(\.ydk)+$/i, '');
   participant.tournamentId = tournamentId;
   participant.deckbuf = Buffer.from(
     YGOProDeck.fromYdkString(