Refactor: Improve logging and error handling

Set default log level to INFO for app and Uvicorn access

Set log level to DEBUG for authentication debugging

将所有API Key相关表述和变量名称调整为认证令牌

Feat: Embed Gemini images and improve health checks

feat: Move health endpoint to v1 and add API key auth

Refactor: Move health check and simplify Mermaid parsing

feat: Integrate metrics API router

Refactor and enhance Gemini proxy and documentation

Enhance logging and memory metrics; fix UI link

feat: Refactor Gemini proxy with native types; add Chinese license

Refactor: Enhance UI, improve documentation, and streamline setup

Improve login and client-side access control

Configure dynamic logging and improve documentation

Initial project setup