Add optional image upload support with better UI layout

Add real-time CoT (Chain of Thought) streaming display

Fix proxies error with robust client initialization and httpx fallback

Fix message submission logic - properly pass message to API

Redesign interface similar to Qwen3-Demo with cleaner layout and better functionality

Revert to stable Gradio 4.19.2 and redesign interface without MultimodalTextbox

Downgrade Gradio to 4.36.0 and fix server configuration

Upgrade Gradio to 4.44.1 for MultimodalTextbox support

Support multimodal input with paste image, add CoT streaming display

Add debug logging and remove instructions section

Fix conversation disappearing issue, change UI to English, remove model selection

修复avatar_images导致的FileNotFoundError

改造为多轮对话聊天机器人界面，添加StepFun logo

使用官方示例代码结构，简化实现，固定依赖版本

彻底解决代理参数问题，添加 requests 备用方案

修复OpenAI客户端proxies参数错误，优化依赖版本

修复OpenAI客户端初始化问题，支持纯文本输入（图片可选）

简化界面，去掉多余说明和示例

支持CoT推理展示，优化界面布局，简化说明文档

优化代码结构，改进错误处理，支持环境变量配置API密钥

完全重写应用：使用更稳定的Gradio 3.50.2版本和简化的代码结构

修复Gradio兼容性问题：指定chatbot type参数，简化代码结构

进一步降级Gradio到4.36.1版本以修复兼容性问题

修复Gradio版本兼容性问题 - 降级到4.42.0版本

Update requirements.txt

Update app.py

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Update requirements.txt

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Update requirements.txt

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Update requirements.txt

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Hide API button and avoid 'No API found' error

Upload app.py

Update app.py to use step-3 model and StepFun API endpoint

Update app.py

Update requirements.txt

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Update requirements.txt

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initial commit