[codex] cli: keep setup and switch its browser modes to local/cloud

[mcfn]

Summary

• keep the actionbook setup command available
• switch the setup browser-mode contract to local|cloud and reject extension inside setup
• preserve supported cloud configs during setup reruns and update setup-focused regression coverage

Why

The setup command itself should remain available. The actual change needed here was narrower: inside setup, the supported browser modes are local|cloud, and extension should no longer be accepted as a real setup mode.

Impact

Users can still run actionbook setup, and top-level help still lists it as an available command. Within setup, --browser extension is rejected, while local and cloud are the supported setup modes. Existing cloud configs continue through setup without being treated as unsupported.

Validation

• cargo test try_parse_from_parses_setup_non_interactive_flags --lib -- --nocapture
• cargo test top_level_help_lists_setup_command --test help_cli -- --nocapture
• cargo test parse_browser_flag_rejects_extension -- --nocapture
• cargo test setup_extension_browser_value_exits_non_zero --test setup_cli -- --nocapture
• cargo test parse_browser_flag_accepts_supported_values -- --nocapture
• cargo test setup_json_non_interactive_cloud_mode_writes_config_without_daemon_side_effects --test setup_cli -- --nocapture
• cargo test setup_non_interactive_existing_cloud_config_is_preserved --test setup_cli -- --nocapture
• cargo test --lib setup:: -- --nocapture

Notes

• cargo test --test setup_cli -- --nocapture still reports one pre-existing failure around env API key persistence that was outside this change.

[chatgpt-codex-connector]

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