[fix]. Remove host review fallback

tests/test_container_runner.py

@@ -117,11 +117,6 @@ def test_run_review_ephemeral_chatgpt_does_not_fallback_to_api_key_path(
         lambda *_args, **_kwargs: (_ for _ in ()).throw(RuntimeError("docker unavailable")),
     )
 
-    def _api_fallback_should_not_run(*_args, **_kwargs):
-        raise AssertionError("API-key fallback should not run in chatgpt mode")
-
-    monkeypatch.setattr("gitea_codex_bot.workers.container_runner.run_review_for_pr", _api_fallback_should_not_run)
-
     from gitea_codex_bot.types import ParsedCommand
 
     result, _repo_cfg = run_review_ephemeral(
@@ -135,6 +130,33 @@ def test_run_review_ephemeral_chatgpt_does_not_fallback_to_api_key_path(
     assert "ChatGPT auth runner failed" in result["summary"]
 
 
+def test_run_review_ephemeral_api_key_mode_does_not_fallback_to_host(monkeypatch: pytest.MonkeyPatch) -> None:
+    get_settings.cache_clear()
+    settings = get_settings()
+
+    monkeypatch.setattr(
+        "gitea_codex_bot.workers.container_runner.prepare_review_prompt",
+        lambda *_args, **_kwargs: ("prompt", {"diff": ""}, object()),
+    )
+    monkeypatch.setattr("gitea_codex_bot.workers.container_runner.GiteaClient", lambda _settings: object())
+    monkeypatch.setattr(
+        "gitea_codex_bot.workers.container_runner.subprocess.run",
+        lambda *_args, **_kwargs: (_ for _ in ()).throw(RuntimeError("docker unavailable")),
+    )
+
+    from gitea_codex_bot.types import ParsedCommand
+
+    result, _repo_cfg = run_review_ephemeral(
+        settings,
+        repo="acme/repo",
+        pr_number=1,
+        command=ParsedCommand(name="review", raw="@codex review"),
+    )
+
+    assert result["verdict"] == "has_issues"
+    assert "API-key auth runner failed" in result["summary"]
+
+
 def test_parse_codex_exec_stdout_from_stream_item_text_json() -> None:
     stdout = '\n'.join(
         [