Update ROADMAP.md, remove CORS & flask-cors from app.py, and update requirements.txt: no longer use CORS for Flask-SocketIO.

app.py

@@ -17,7 +17,6 @@ import secrets
 from sqlalchemy.sql import func
 from openai import OpenAI
 from dotenv import load_dotenv
-from flask_cors import CORS
 from flask_socketio import SocketIO, emit
 from flask_wtf.csrf import CSRFProtect
 
@@ -92,9 +91,8 @@ login_manager.login_view = 'login'
 # Erst nach der App-Initialisierung die DB-Check-Funktionen importieren
 from utils.db_check import check_db_connection, initialize_db_if_needed
 
-# CORS und SocketIO initialisieren
-CORS(app)
-socketio = SocketIO(app, cors_allowed_origins="*")
+# SocketIO initialisieren
+socketio = SocketIO(app)
 
 # Security
 csrf = CSRFProtect(app)