fix(llm): sanitize model endpoint errors (#6021)

tests/test_llm_endpoint_error_messages.py

@@ -24,3 +24,54 @@ def test_llm_test_maps_internal_model_dump_error_to_base_url_hint():
     assert "基础地址" in resp.message
     assert "API Base URL" in resp.message
     assert "model_dump" not in resp.message
+
+
+def test_llm_test_maps_internal_private_attribute_error_to_base_url_hint():
+    """LLM 测试遇到 SDK 内部属性错误时应提示检查基础地址。"""
+    with patch.object(llm_endpoint.settings, "AI_AGENT_ENABLE", True), patch.object(
+        llm_endpoint.settings, "LLM_PROVIDER", "openai"
+    ), patch.object(llm_endpoint.settings, "LLM_MODEL", "gpt-4o-mini"), patch.object(
+        llm_endpoint.settings, "LLM_API_KEY", "sk-test"
+    ), patch.object(
+        llm_endpoint.LLMHelper,
+        "test_current_settings",
+        AsyncMock(
+            side_effect=AttributeError(
+                "'str' object has no attribute '_set_private_attributes'"
+            )
+        ),
+        create=True,
+    ):
+        resp = asyncio.run(llm_endpoint.llm_test(_="token"))
+
+    assert not resp.success
+    assert "基础地址" in resp.message
+    assert "API Base URL" in resp.message
+    assert "_set_private_attributes" not in resp.message
+
+
+def test_llm_models_maps_internal_private_attribute_error_to_base_url_hint():
+    """LLM 模型列表遇到 SDK 内部属性错误时应提示检查基础地址。"""
+    with patch.object(
+        llm_endpoint.LLMHelper,
+        "get_models",
+        AsyncMock(
+            side_effect=AttributeError(
+                "'str' object has no attribute '_set_private_attributes'"
+            )
+        ),
+        create=True,
+    ):
+        resp = asyncio.run(
+            llm_endpoint.get_llm_models(
+                provider="openai",
+                api_key="sk-test",
+                base_url="https://example.com",
+                _="token",
+            )
+        )
+
+    assert not resp.success
+    assert "基础地址" in resp.message
+    assert "API Base URL" in resp.message
+    assert "_set_private_attributes" not in resp.message