Release v1.6.1：support openrouter.ai provider

Support OpenRouter.ai provider.

Release v1.5.1: support DeepSeek's official OpenAPI

• Support DeepSeek's official OpenAPI, you can change model provider in the configuation page.
• You can change timeout setting in configuration page.

Release v1.4.1：support WebSearch mode

Use Fn↩︎ to trigger web search.

Web search mode is backed by Volcengine Ark's application, please refer to README.md 's Configuration section for more information.