chore: Added redirect URL. APP_BASE_URL set in .env

auth.py

@@ -101,5 +101,7 @@ async def auth_twitch_callback(code: str, state: str, request: Request, db: Sess
         db.add(user)
     
     db.commit()
-
-    return {"message": f"Successfully authenticated as {user_data['display_name']}. User data has been saved."}
+    
+    # Redirect to a future dashboard page for a better user experience
+    # For now, we can redirect back to the home page.
+    return RedirectResponse(url="/")