[Bug]: 从0.15.0开始非Open Design的API调用一直报额度已用尽的问题，但实际上所接API的模型根本不存在这个问题

### Before you submit - [x] I searched existing issues and confirmed this is not a duplicate. - [x] I replaced the example text with the real behavior, reproduction steps, expected result, and version from the app's About menu or `od --version`. ### What happened? 报错源码：Agent completed without producing any output. The model or provider may have returned an empty response. Check the agent logs for upstream errors, then try re-authenticating the agent, checking quota, or switching models. Open Design run error diagnostics trace_id: 87cb4766-ee8e-42e2-a578-20e0a7414e18 run_id: 87cb4766-ee8e-42e2-a578-20e0a7414e18 error_code: AGENT_EXECUTION_FAILED project_id: d87deb13-3c5b-46b4-88aa-74d9ea16a80a conversation_id: 45b7901f-c53e-4826-ac5a-e9d86791af80 assistant_message_id: 16290b36-dce8-4b0b-aa8e-357776e37e06 agent_id: openai-api 从0.15.0的版本开始使用非OpenDesign的API，一直有这个报错，导致更本执行不了任务，只有降级到0.14.1的版本才可以用，这是软件的BUG呢，还是说Open Design现在要强制使用Open Design Cloud提供的模型才让用了 ### Steps to reproduce 在设置中配置第三方API执行任务就会出现这个问题，不管是DeepSeek、KiMi官方的API调用还是中转的都有 ### Expected behavior 希望能够解决这个问题，不然都用不了 ### Open Design version 0.15.0-0.16.1 ### Platform macOS (Apple Silicon) ### Logs (optional) ```shell Agent completed without producing any output. The model or provider may have returned an empty response. Check the agent logs for upstream errors, then try re-authenticating the agent, checking quota, or switching models. Open Design run error diagnostics trace_id: 87cb4766-ee8e-42e2-a578-20e0a7414e18 run_id: 87cb4766-ee8e-42e2-a578-20e0a7414e18 error_code: AGENT_EXECUTION_FAILED project_id: d87deb13-3c5b-46b4-88aa-74d9ea16a80a conversation_id: 45b7901f-c53e-4826-ac5a-e9d86791af80 assistant_message_id: 16290b36-dce8-4b0b-aa8e-357776e37e06 agent_id: openai-api ``` ### Screenshots (optional) _No response_ ### Additional context _No response_