v0.4.0

✨ Features

• use the shared Steam notification style with the NVIDIA icon (moi952)

🐛 Bug Fixes

• support Main driver staging and guard EFI shutdown migration (60plus)
  Omit empty Arch pin arguments and recognize Valve's complete Main finalizer
  loop before inserting the driver repair hook.
  Arm a verified runtime systemd override before staging on the affected Main
  implementation. Keep EFI mounts in a private namespace during shutdown,
  preserve custom overrides, and let the guard expire automatically at reboot.
  Validate with 109 Python tests, namespace probes, frontend checks, and a real
  Main 610-to-615 Decky update and reboot on a 5 GiB read-only root. Record the
  hardware scope and remaining unrelated preparation warnings.
• migrate legacy builds and collect only unpinned driver caches (60plus)

🔧 Chores

• add the 0.4.0 what's new entry (moi952)
• reset version to 0.3.0 for the 0.4.0 release (moi952)
• use upstream decky-ui-kit 0.6.1 without local patch (60plus)
• prepare SteamOS adaptation for upstream (60plus)
• v0.4.0-standalone.9 (60plus)

📦 Other

• Merge pull request #2 from 60plus/pr/steamos-ab-upstream (moi952)
  Support SteamOS A/B driver updates without requiring an 8 GiB root
• Restore plugin self-updates and retain upstream README structure (60plus)
• Adapt plugin to standalone SteamOS A/B driver updates (60plus)