fix: resolve login network error behind Traefik proxy

app.py

@@ -16,11 +16,9 @@ def create_app():
     app.secret_key = SECRET_KEY
     app.config['SESSION_COOKIE_HTTPONLY'] = True
     app.config['SESSION_COOKIE_SAMESITE'] = 'Lax'
-    app.config['SESSION_COOKIE_SECURE'] = os.getenv('FLASK_ENV') == 'production'
     app.config['PERMANENT_SESSION_LIFETIME'] = 86400  # 24 hours
-    app.config['PREFERRED_URL_SCHEME'] = 'https'
     
-    # Trust the reverse proxy headers from Coolify/Traefik
+    # Behind Coolify/Traefik: trust proxy headers
     from werkzeug.middleware.proxy_fix import ProxyFix
     app.wsgi_app = ProxyFix(app.wsgi_app, x_for=1, x_proto=1, x_host=1, x_prefix=1)
     
@@ -53,4 +51,4 @@ if __name__ == '__main__':
     
     print("=" * 60)
     
-    app.run(debug=True, port=5009)
+    app.run(debug=True, port=5009)