Self-review of #38465 surfaced three real items: 1. SystemExit escape (defense): `_login_nous` raises SystemExit(130)/(1) on cancel/failure. The logged-out login path inside `_model_flow_nous` catches it, but the expired-session re-login path (main.py) only catches Exception, so a Ctrl-C during re-auth could propagate past `_run_portal_one_shot` and kill the CLI. Add SystemExit to the portal handler so all cancel/abort cases end with the graceful 'Setup cancelled / retry later' message. 2. Doc sweep: the model-pick step was only added to the bare-`hermes portal` prose. Propagate it to the surfaces describing `hermes setup --portal` behavior that still omitted model selection: - `--portal` argparse help (main.py) - nous-portal.md intro + the numbered 'what it does' step list (EN + zh-Hans) - run-hermes-with-nous-portal.md 'default model after setup --portal' line, which was now contradictory (there's a picker, not a forced default) (EN + zh) 3. Test coverage: add parametrized regression test asserting the portal handler swallows KeyboardInterrupt / EOFError / SystemExit (returns None, no escape). Note on 'Skip (keep current)': delegating to _model_flow_nous means picking Skip preserves the prior provider instead of force-switching to nous — this is intentional and matches quick setup exactly; docs now say 'sets Nous as your provider (when you pick a model)' rather than unconditionally.
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