refactor(test): consolidate temp home + vitest setup

src/commands/agent.test.ts

@@ -1,5 +1,4 @@
 import fs from "node:fs";
-import os from "node:os";
 import path from "node:path";
 
 import {
@@ -11,6 +10,8 @@ import {
   vi,
 } from "vitest";
 
+import { withTempHome as withTempHomeBase } from "../../test/helpers/temp-home.js";
+
 vi.mock("../agents/pi-embedded.js", () => ({
   abortEmbeddedPiRun: vi.fn().mockReturnValue(false),
   runEmbeddedPiAgent: vi.fn(),
@@ -39,15 +40,7 @@ const runtime: RuntimeEnv = {
 const configSpy = vi.spyOn(configModule, "loadConfig");
 
 async function withTempHome<T>(fn: (home: string) => Promise<T>): Promise<T> {
-  const base = fs.mkdtempSync(path.join(os.tmpdir(), "clawdbot-agent-"));
-  const previousHome = process.env.HOME;
-  process.env.HOME = base;
-  try {
-    return await fn(base);
-  } finally {
-    process.env.HOME = previousHome;
-    fs.rmSync(base, { recursive: true, force: true });
-  }
+  return withTempHomeBase(fn, { prefix: "clawdbot-agent-" });
 }
 
 function mockConfig(