Simplify menus with Enter navigation

src/tests/test_cli_invalid_input.py

@@ -52,12 +52,11 @@ def _make_pm(called, locked=None):
 def test_empty_and_non_numeric_choice(monkeypatch, capsys):
     called = {"add": False, "retrieve": False, "modify": False}
     pm, _ = _make_pm(called)
-    inputs = iter(["", "abc", "8"])
+    inputs = iter(["abc", ""])
     monkeypatch.setattr(main, "timed_input", lambda *_: next(inputs))
     with pytest.raises(SystemExit):
         main.display_menu(pm, sync_interval=1000, inactivity_timeout=1000)
     out = capsys.readouterr().out
-    assert "No input detected" in out
     assert "Invalid choice. Please select a valid option." in out
     assert not any(called.values())
 
@@ -65,7 +64,7 @@ def test_empty_and_non_numeric_choice(monkeypatch, capsys):
 def test_out_of_range_menu(monkeypatch, capsys):
     called = {"add": False, "retrieve": False, "modify": False}
     pm, _ = _make_pm(called)
-    inputs = iter(["9", "8"])
+    inputs = iter(["9", ""])
     monkeypatch.setattr(main, "timed_input", lambda *_: next(inputs))
     with pytest.raises(SystemExit):
         main.display_menu(pm, sync_interval=1000, inactivity_timeout=1000)
@@ -77,7 +76,7 @@ def test_out_of_range_menu(monkeypatch, capsys):
 def test_invalid_add_entry_submenu(monkeypatch, capsys):
     called = {"add": False, "retrieve": False, "modify": False}
     pm, _ = _make_pm(called)
-    inputs = iter(["1", "8", "7", "8"])
+    inputs = iter(["1", "8", "", ""])
     monkeypatch.setattr(main, "timed_input", lambda *_: next(inputs))
     monkeypatch.setattr("builtins.input", lambda *_: next(inputs))
     with pytest.raises(SystemExit):
@@ -92,7 +91,7 @@ def test_inactivity_timeout_loop(monkeypatch, capsys):
     pm, locked = _make_pm(called)
     pm.last_activity = 0
     monkeypatch.setattr(time, "time", lambda: 100.0)
-    monkeypatch.setattr(main, "timed_input", lambda *_: "8")
+    monkeypatch.setattr(main, "timed_input", lambda *_: "")
     with pytest.raises(SystemExit):
         main.display_menu(pm, sync_interval=1000, inactivity_timeout=0.1)
     out = capsys.readouterr().out