update simple_jwt

AppImage/scripts/flask_server.py

@@ -29,7 +29,12 @@ from datetime import datetime, timedelta
 from functools import wraps
 from pathlib import Path
 
-import jwt
+# Try PyJWT first, fall back to our simple implementation (no cryptography dependency)
+try:
+    import jwt
+except ImportError:
+    import simple_jwt as jwt
+
 import psutil
 from flask import Flask, jsonify, request, send_file, send_from_directory, Response
 from flask_cors import CORS