Mirrors the FR1 live_gui smoke test: the full end-to-end live_gui FR3
test would require mock injection into the live_gui subprocess. The
mock-based regression coverage for FR3 is already in
test_ai_loop_regressions_20260614.py::test_fr3_minimax_thinking_in_returned_text.
This smoke test verifies the disc_entries field is exposed via the
Hook API, establishing the integration substrate for follow-up work.
