docs: document issue 28 README redesign and validation
docs: add issue 40 proxy settings UI design and prototype
docs: 记录 issue 29 worktree 设计与验收
docs: document issue 36 commit graph and validation
docs: 归档 Issue 31 界面重构与验收截图
docs: deliver issue 31 as light theme design images
docs: add issue 31 UI design and prototype
docs: record migration verification and link implementation PR
docs: migrate issue designs and validation assets to wiki