fix: retire freefirst fast alias

scripts/task-ai-management-browser-smoke.js

@@ -105,7 +105,7 @@ async function main() {
     await page.locator("#ai-admin-models.is-active").waitFor();
     const modelPanel = page.locator("#ai-admin-models");
     await modelPanel.locator('[data-field="allowedModels"]').fill(
-      "omniroute/freefirst, omniroute/freefirst-fast",
+      "omniroute/freefirst, omniroute/gpt-5.4-mini",
     );
     await modelPanel.locator('[data-field="secretRef"]').fill("env://OMNIROUTE_API_KEY");
     await modelPanel.getByRole("button", { name: "保存配置" }).click();
@@ -250,7 +250,7 @@ async function main() {
     });
     assert.equal(effective.defaultModel, "omniroute/freefirst");
     assert(
-      (effective.models || []).some((model) => model.id === "omniroute/freefirst-fast"),
+      (effective.models || []).some((model) => model.id === "omniroute/gpt-5.4-mini"),
       "effective models 应包含管理员允许的模型",
     );
     assert(