- Upgrade go-version from 1.24 to 1.25 in build.yml (required by go-selfupdate v1.6.0)
- Add kctl-tui update command and interactive startup check to README.md
- Document new features in CHANGELOG.md
- Update Go version requirement to 1.25+ in README.md and CONTRIBUTING.md
- Add Phase 5 (Self-update) to PLAN.md roadmap
- SPEC.md: Windows is now a fully supported platform (not secondary)
- SPEC.md: Remove outdated 'manual pane handling' claim for Windows
- SPEC.md: Update non-functional requirements (Linux/macOS/Windows)
- README.md: Remove duplicate 'This downloads...' paragraph
- README.md: Use --namespace instead of -n in k9s examples