Clear all auth cookies when API token refresh fails before redirecting to login

Co-Authored-By: Codex <codex@openai.com>

src/api/client.js

@@ -88,6 +88,8 @@ apiClient.interceptors.response.use(
 
       // Refresh failed: clear auth and redirect to login
       deleteCookie("luciaToken");
+      deleteCookie("luciaRefreshToken");
+      deleteCookie("isLuciaLoggedIn");
       window.location.href = "/login";
       return Promise.reject(refreshError);
     }