• Cooperative mode protects itself. If you force ShelvesHub to host Deck Shelves while a
  plugin loader is installed and that keeps making the Steam screen go black, ShelvesHub now
  backs off to plain coexistence for the session instead of fighting the loader — and the tab
  explains why. You can keep forcing through it with SHELVES_COOP_SAFE_MODE=0. It also holds
  back hub-driven plugin updates in this mode so your two copies can't drift apart in version.
• Optional desktop tray icon — tick one box in the installer. The installer now has an
  off-by-default option to add a small menu-bar / system-tray app showing whether ShelvesHub is
  hosting, with quick actions (pause/resume, restart the service, restart the data backend). It is
  a separate helper installed by the same installer (no extra download) and removed cleanly on
  uninstall. See docs/installation.md.
• Restart the data backend without restarting everything. If the data backend gets stuck,
  the tab's Troubleshooting section now has a "Restart backend" button that restarts only it —
  your shelves and hosting keep running.
• A setup checker that can fix itself. shelveshub doctor checks the things that stop
  ShelvesHub from appearing — the Steam debug flag, the debug port, Steam running, the
  background service — and tells you exactly what to do for any that fail. shelveshub doctor --fix creates the Steam debug flag for you.
• One-command diagnostics. shelveshub status prints a report (OS, architecture,
  glibc, Python, and — on Linux — device model and displays) you can paste into a bug
  report, especially on ARM64.
• Smarter automatic recovery. It now detects whether your system has the SteamOS
  session service: a Steam Deck still restarts it, a generic Linux without it just pauses
  instead of running a pointless restart.
• Safer bundle downloads. When a Deck Shelves release ships a SHA256SUMS, ShelvesHub
  checks the bundle and backend it downloads against it and refuses anything that doesn't
  match — a corrupted or tampered download is rejected, not injected.