test(cli): stabilize AuthDialog ESC assertion

[liqiongyu]

TLDR

• Stabilize the AuthDialog ESC-key test by waiting for the async frame update before asserting.

Dive Deeper

AuthDialog renders the ESC error output asynchronously. The test could sometimes assert against a previous frame and flake. This change uses vi.waitFor to wait until the frame contains both:

• "You must select an auth method"
• "Press Ctrl+C again to exit"

This PR is split out from #1531 to keep the MCP resource expansion PR focused.

Reviewer Test Plan

1. Run npx vitest packages/cli/src/ui/auth/AuthDialog.test.tsx.
2. Optional: npx vitest packages/cli/src/ui/auth/AuthDialog.test.tsx -t "escape key".

Testing Matrix

	🍏	🪟	🐧
npm run	❓	❓	❓
npx	✅	❓	❓
Docker	❓	❓	❓
Podman	❓	-	-
Seatbelt	❓	-	-

Linked issues / bugs

• Split out from fix(cli): expand MCP @server: resource references #1531