test: scope search setup locale

src/flows/search-setup.test.ts

@@ -173,8 +173,6 @@ describe("runSearchSetupFlow", () => {
   });
 
   it("localizes setup copy for web search provider selection", async () => {
-    const previousLocale = process.env.OPENCLAW_LOCALE;
-    process.env.OPENCLAW_LOCALE = "zh-CN";
     const note = vi.fn(async () => {});
     const select = vi.fn().mockResolvedValueOnce("__skip__");
     const prompter = createWizardPrompter({
@@ -182,19 +180,13 @@ describe("runSearchSetupFlow", () => {
       select: select as never,
     });
 
-    try {
+    await withEnvAsync({ OPENCLAW_LOCALE: "zh-CN" }, async () => {
       await runSearchSetupFlow(
         { plugins: { allow: ["xai"] } },
         createNonExitingRuntime(),
         prompter,
       );
-    } finally {
-      if (previousLocale === undefined) {
-        delete process.env.OPENCLAW_LOCALE;
-      } else {
-        process.env.OPENCLAW_LOCALE = previousLocale;
-      }
-    }
+    });
 
     expect(note).toHaveBeenCalledWith(expect.stringContaining("在线查询资料"), "网页搜索");
     expect(select).toHaveBeenCalledWith(