[Bug] [OpenaiChat] Empty reply

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Configuration
(Required)

• Model: gpt-4o-mini
• Provider: OpenaiChat
• Interface: API or Web

Bug description Clear steps to reproduce:

1. Start a new chat with OpenaiChat
2. All replies are empty

Environment

• Python version: 3.14.6
• OS: Microsoft Windows [Version 10.0.19045.2673]

Screenshots/Logs