v0.6.3: finalize audit fixes and docs

feat(actions): remove pin/unpin from generic chat tools, moved to v0.7 group admin roadmap

docs: demote unsend/delete actions to roadmap v0.7 for group management

feat(file): resolve real download URLs for file segments using get_private_file_url/get_group_file_url APIs; fix context propagation for outbound message ids

fix(audio): remove ffmpeg fallback; fix memory leaks and uncaught exceptions in handler and outbound

chore: remove obsolete UPGRADE-PLAN-v0.5.md

v0.6.0: 10 new features + 17 bug fixes from 5-round audit

refactor: split channel.ts into 6 modules

chore: bump version to 0.4.0

v0.4: 修复 status WARN 误报 + 语音转写改用 SDK + README 更新

docs: update README with GitHub username

feat: openclaw-napcatqq v0.2 — full QQ channel plugin