test(agents): dedupe copilot models-config token setup

src/agents/models-config.uses-first-github-copilot-profile-env-tokens.e2e.test.ts

@@ -1,11 +1,11 @@
 import fs from "node:fs/promises";
 import path from "node:path";
-import { describe, expect, it, vi } from "vitest";
-import { captureEnv } from "../test-utils/env.js";
+import { describe, expect, it } from "vitest";
 import { resolveOpenClawAgentDir } from "./agent-paths.js";
 import {
   installModelsConfigTestHooks,
   mockCopilotTokenExchangeSuccess,
+  withCopilotGithubToken,
   withUnsetCopilotTokenEnv,
   withModelsTempHome as withTempHome,
 } from "./models-config.e2e-harness.js";
@@ -53,19 +53,7 @@ describe("models-config", () => {
 
   it("does not override explicit github-copilot provider config", async () => {
     await withTempHome(async () => {
-      const envSnapshot = captureEnv(["COPILOT_GITHUB_TOKEN"]);
-      process.env.COPILOT_GITHUB_TOKEN = "gh-token";
-      const fetchMock = vi.fn().mockResolvedValue({
-        ok: true,
-        status: 200,
-        json: async () => ({
-          token: "copilot-token;proxy-ep=proxy.copilot.example",
-          expires_at: Math.floor(Date.now() / 1000) + 3600,
-        }),
-      });
-      globalThis.fetch = fetchMock as unknown as typeof fetch;
-
-      try {
+      await withCopilotGithubToken("gh-token", async () => {
         await ensureOpenClawModelsJson({
           models: {
             providers: {
@@ -85,9 +73,7 @@ describe("models-config", () => {
         };
 
         expect(parsed.providers["github-copilot"]?.baseUrl).toBe("https://copilot.local");
-      } finally {
-        envSnapshot.restore();
-      }
+      });
     });
   });
 });