fix: avoid Claude token refresh races across services

src/token-refresh.test.ts

@@ -0,0 +1,13 @@
+import { describe, expect, it } from 'vitest';
+
+import { shouldStartTokenRefreshLoop } from './token-refresh.js';
+
+describe('shouldStartTokenRefreshLoop', () => {
+  it('starts refresh for the Claude service', () => {
+    expect(shouldStartTokenRefreshLoop('claude-code')).toBe(true);
+  });
+
+  it('skips refresh for the Codex service', () => {
+    expect(shouldStartTokenRefreshLoop('codex')).toBe(false);
+  });
+});