Release v3.0

1. Support mainstream reasoning models now. i.e., gpt-5.x series from OpenAI, deepseek-chat/reasoner from Deepseek, gemini-3-pro-preview/gemini-2.5-flash from Google, and kimi-k2.5 from Moonshot.
2. Improve UI; add the thinking block, so users can see the reason content from the model.
3. fix other relevant bugs. such as google gemini wrong api issue.