Implement unified story generation flow

backend/tests/test_provider_router.py

@@ -299,6 +299,21 @@ class TestProviderPolicy:
         assert result.transcript_text == "我想听一个小熊找星星的故事"
         assert result.confidence == 1.0
         assert result.provider == "demo"
+
+    def test_openai_asr_default_config_uses_openai_env(self):
+        from app.services.provider_router import _get_default_config
+
+        with patch("app.services.provider_router.settings") as mock_settings:
+            mock_settings.openai_api_key = "openai-key"
+            mock_settings.openai_api_base = "https://api.example.com/v1"
+            mock_settings.voice_transcription_model = "gpt-4o-mini-transcribe"
+
+            config = _get_default_config("openai_asr")
+
+        assert config is not None
+        assert config.api_key == "openai-key"
+        assert config.api_base == "https://api.example.com/v1"
+        assert config.model == "gpt-4o-mini-transcribe"
 
 
 class TestProviderConfigFromDB: