[Bug] The environment variable DEFAULT_MODEL configuration is invalid

[chiachan163]

📦 Deployment Method

Vercel

📌 Version

v2.15.8

💻 Operating System

Other

📌 System Version

vercel

🌐 Browser

Chrome

📌 Browser Version

131.0.6778.140

🐛 Bug Description

fetch("/api/config", {
        method: "post",
        body: null,
        headers: {
          ...getHeaders(),
        },
      })
        .then((res) => res.json())
        .then((res) => {
          const defaultModel = res.defaultModel ?? "";
          if (defaultModel !== "") {
            const [model, providerName] = getModelProvider(defaultModel);
            DEFAULT_CONFIG.modelConfig.model = model;
            DEFAULT_CONFIG.modelConfig.providerName = providerName as any;
          }

          return res;
        })

配置了环境变量DEFAULT_MODEL=gpt-3.5-turbo@OpenAi ，发现不生效。
看来源码，是有处理的。

最后定位到这里，发现是接口返回数据并没有写入。所以取数据还是默认值gpt-4o-mini

📷 Recurrence Steps

No response

🚦 Expected Behavior

No response

📝 Additional Information

No response

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Title: [Bug] The environment variable DEFAULT_MODEL configuration is invalid