feat(tui): Phase 8 多模态接入（图片/文件）+ Phase 9 会话切换（/session#308

phantom5099 merged 7 commits into

1024XEngineer:main1024XEngineer/neo-code:mainfrom

creatang:codex/issue-266-header-render-fixcreatang/neo-code:codex/issue-266-header-render-fixCopy head branch name to clipboard