logo and architecture fixes

backend/igny8_core/settings.py

@@ -89,6 +89,11 @@ SESSION_SAVE_EVERY_REQUEST = False  # Don't update session on every request (red
 SESSION_COOKIE_PATH = '/'  # Explicit path
 # Don't set SESSION_COOKIE_DOMAIN - let it default to current domain for strict isolation
 
+# CRITICAL: Custom authentication backend to disable user caching
+AUTHENTICATION_BACKENDS = [
+    'igny8_core.auth.backends.NoCacheModelBackend',  # Custom backend without caching
+]
+
 MIDDLEWARE = [
     'django.middleware.security.SecurityMiddleware',
     'whitenoise.middleware.WhiteNoiseMiddleware',