Replace the old "Backup & Upgrade" button (which opened GitHub releases) with a proper multi-step upgrade dialog: confirm → backup → run upgrade command → done. Works for both local and remote (SSH) instances. Generated with [Claude Code](https://claude.ai/code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>