Bug-fix release.
Fixes
- macOS agent: Borg not installed without Homebrew (#311) — on macOS, Borg has to come from Homebrew; the agent's first-run fallbacks don't work there, so without Homebrew the agent ended up with "borg command not found" and backups failed. The installer now checks for Homebrew up front and, if it's missing, asks whether to install it (and installs it as your normal user). If you decline — or there's no terminal to prompt — it stops with clear instructions instead of producing a Borg-less agent.