Release 0.4.0 Cuts the release that includes the read-only `stock tui` dashboard, `make dogfood` for container-based real-manager testing, the apt empty-cache fix, and the README restructure. Code has been on main since April 22 but no tag was pushed, so AUR / Nix / GitHub release artifacts and `go install @latest` users have been stuck on 0.3.1 without a TUI. This unblocks them.