refactor: 程式碼品質優化、LangChain 遷移與內容擴充#85

markl-a merged 3 commits intomainmarkl-a/My-AI-Learning-Notes:mainfrom

claude/merge-to-main-NHI8Mmarkl-a/My-AI-Learning-Notes:claude/merge-to-main-NHI8MCopy head branch name to clipboard