Massive Improvements & MVP Patches

tests/test_config.py

@@ -1,6 +1,13 @@
 from gitea_codex_bot.config import get_settings
 
 
-def test_openai_api_key_required() -> None:
+def test_openai_api_key_from_env() -> None:
     settings = get_settings()
-    assert settings.openai_api_key.get_secret_value() == "openai-key"
+    assert settings.openai_api_key is not None
+    assert settings.openai_api_key.get_secret_value() == "openai-key"
+
+
+def test_codex_auth_defaults_to_api_key_mode() -> None:
+    settings = get_settings()
+    assert settings.codex_auth_mode == "api_key"
+    assert settings.codex_auth_json_path is None