fix(tests): clear agent root env vars once in the vitest setup file

src/__tests__/helpers/clear-agent-session-env.ts

@@ -9,3 +9,11 @@ import { AGENT_SESSION_ENV } from '../../utils/session-id.js';
 for (const name of AGENT_SESSION_ENV) {
   delete process.env[name];
 }
+
+// The same shell may relocate an agent's root (CLAUDE_CONFIG_DIR, COPILOT_HOME,
+// OPENCLAW_STATE_DIR), which teamai honors, so a test that stubs only HOME
+// would still read, write or remove the developer's real Claude Code, Copilot
+// or OpenClaw files. A test that needs one sets it.
+for (const name of ['CLAUDE_CONFIG_DIR', 'COPILOT_HOME', 'OPENCLAW_STATE_DIR']) {
+  delete process.env[name];
+}

src/__tests__/local-agent-model-config.test.ts

@@ -35,7 +35,6 @@ let originalGuardedEnv: Record<string, string | undefined>;
 
 beforeEach(async () => {
   home = await fse.mkdtemp(path.join(os.tmpdir(), 'teamai-model-config-'));
-  vi.stubEnv('CLAUDE_CONFIG_DIR', undefined);
   originalHome = process.env.HOME;
   process.env.HOME = home;
   originalGuardedEnv = {};
@@ -54,7 +53,6 @@ beforeEach(async () => {
 
 afterEach(async () => {
   process.env.HOME = originalHome;
-  vi.unstubAllEnvs();
   for (const key of GUARDED_ENV_KEYS) {
     const value = originalGuardedEnv[key];
     if (value === undefined) delete process.env[key];

src/__tests__/uninstall.test.ts

@@ -205,7 +205,6 @@ describe('uninstall', () => {
 
   beforeEach(async () => {
     tmpDir = await fse.mkdtemp(path.join(os.tmpdir(), 'teamai-uninstall-test-'));
-    vi.stubEnv('CLAUDE_CONFIG_DIR', undefined);
     mockAutoDetectInit.mockReset();
     mockReconcileHooks.mockReset();
     mockSaveLocalConfig.mockReset();