Harden setup provider flows

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tests/hermes_cli/test_terminal_menu_fallbacks.py

@@ -0,0 +1,106 @@
+"""Regression tests for numbered fallbacks when TerminalMenu cannot initialize."""
+
+import subprocess
+import sys
+import types
+
+from hermes_cli.config import load_config, save_config
+
+
+class _BrokenTerminalMenu:
+    def __init__(self, *args, **kwargs):
+        raise subprocess.CalledProcessError(2, ["tput", "clear"])
+
+
+def test_prompt_model_selection_falls_back_on_terminalmenu_runtime_error(monkeypatch):
+    from hermes_cli.auth import _prompt_model_selection
+
+    monkeypatch.setitem(
+        sys.modules,
+        "simple_term_menu",
+        types.SimpleNamespace(TerminalMenu=_BrokenTerminalMenu),
+    )
+    responses = iter(["2"])
+    monkeypatch.setattr("builtins.input", lambda _prompt="": next(responses))
+
+    selected = _prompt_model_selection(["model-a", "model-b"])
+
+    assert selected == "model-b"
+
+
+def test_prompt_reasoning_effort_falls_back_on_terminalmenu_runtime_error(monkeypatch):
+    from hermes_cli.main import _prompt_reasoning_effort_selection
+
+    monkeypatch.setitem(
+        sys.modules,
+        "simple_term_menu",
+        types.SimpleNamespace(TerminalMenu=_BrokenTerminalMenu),
+    )
+    responses = iter(["3"])
+    monkeypatch.setattr("builtins.input", lambda _prompt="": next(responses))
+
+    selected = _prompt_reasoning_effort_selection(["low", "medium", "high"], current_effort="")
+
+    assert selected == "high"
+
+
+def test_remove_custom_provider_falls_back_on_terminalmenu_runtime_error(tmp_path, monkeypatch):
+    from hermes_cli.main import _remove_custom_provider
+
+    monkeypatch.setenv("HERMES_HOME", str(tmp_path))
+    monkeypatch.setitem(
+        sys.modules,
+        "simple_term_menu",
+        types.SimpleNamespace(TerminalMenu=_BrokenTerminalMenu),
+    )
+
+    cfg = load_config()
+    cfg["custom_providers"] = [
+        {"name": "Local A", "base_url": "http://localhost:8001/v1"},
+        {"name": "Local B", "base_url": "http://localhost:8002/v1"},
+    ]
+    save_config(cfg)
+
+    responses = iter(["1"])
+    monkeypatch.setattr("builtins.input", lambda _prompt="": next(responses))
+
+    _remove_custom_provider(cfg)
+
+    reloaded = load_config()
+    assert reloaded["custom_providers"] == [
+        {"name": "Local B", "base_url": "http://localhost:8002/v1"},
+    ]
+
+
+def test_named_custom_provider_model_picker_falls_back_on_terminalmenu_runtime_error(tmp_path, monkeypatch):
+    from hermes_cli.main import _model_flow_named_custom
+
+    monkeypatch.setenv("HERMES_HOME", str(tmp_path))
+    monkeypatch.setitem(
+        sys.modules,
+        "simple_term_menu",
+        types.SimpleNamespace(TerminalMenu=_BrokenTerminalMenu),
+    )
+    monkeypatch.setattr("hermes_cli.models.fetch_api_models", lambda *args, **kwargs: ["model-a", "model-b"])
+    monkeypatch.setattr("hermes_cli.auth.deactivate_provider", lambda: None)
+
+    cfg = load_config()
+    save_config(cfg)
+
+    responses = iter(["2"])
+    monkeypatch.setattr("builtins.input", lambda _prompt="": next(responses))
+
+    _model_flow_named_custom(
+        cfg,
+        {
+            "name": "Local",
+            "base_url": "http://localhost:8000/v1",
+            "api_key": "",
+            "model": "",
+        },
+    )
+
+    reloaded = load_config()
+    assert reloaded["model"]["provider"] == "custom"
+    assert reloaded["model"]["base_url"] == "http://localhost:8000/v1"
+    assert reloaded["model"]["default"] == "model-b"