[Marc-André Moreau (mamoreau-devolutions)]

Jiffshot (a screen capture tool and editor) now runs as one Rustolonia app: a tray icon, windows created hidden and shown later, topmost and see-through capture UI, and windows left out of screen captures. This adds what the projection did not cover yet.

What's in it

• IAvnApplication6 (stage 33), a separately versioned capability. Existing hosts and consumers are unaffected:
  • SetShutdownMode: last window, main window or explicit (Run uses it).
  • CreateRustVmTray: tray icons are released when Run ends.
  • GetPlatformHandle, SetWindowTopmost, SetWindowTransparent.
  • SetWindowExcludedFromCapture: Windows only, E_NOTIMPL elsewhere.
• Tray icons declared in the view-model schema:
  • A top-level trays list: model, a Tray-kind menu, icon, tooltip, activate command.
  • The Tray menu kind rejects gestures; Recent Files and toggles work as in application menus.
  • Generated Create{Menu} and Attach{Tray}Tray, plus RustViewRegistry.CreateTray.
  • The managed RustTrayAttachment, and a generated Rust mount_<tray>.
• Hidden mounts:
  • AppScope::mount_hidden.
  • mount_dynamic_view_model_hidden, which returns the Window.
  • Generated mount_<view>_hidden, and Window::show.
• Rust: rustolonia::shell (ShutdownMode, set_shutdown_mode, platform_handle, set_topmost, set_transparent, set_excluded_from_capture) over the rustolonia-sys vtable.
• Docs: rust/COMPATIBILITY.md, rust/MENUS.md.

The schema gains trays only when one is declared, so existing IR files normalize unchanged. The sample and app outputs are regenerated: each registry gains an empty CreateTray, and nothing else changes.

Testing

• Before the rebase:
  • tests/Avalonia.Projection.Ir.Tests: 138 passed, including the new ViewModelTrayIrTests.
  • tests/Avalonia.Projection.Generator.Tests: 98 passed, including the new ViewModelTrayEmitterTests.
  • rustolonia-sys nativeaot_fixture: 11 passed, including the new capability.
• After rebasing onto master (which only adds the 12.1.1 host checksums): the IR and generator suites pass again. The native fixture was not rerun.
• In use: Jiffshot has run on this branch through its whole move to one process. That covers the tray icon and its menu, the hidden editor and Capture windows, the explicit shutdown, and the platform handle.

Notes for review

• This adds a new host capability, so per rust/COMPATIBILITY.md it belongs in a release that bumps all three crates. No version is bumped here.
• Jiffshot builds these from source today. It needs a published release before it can use the prebuilt host.

🤖 Generated with Claude Code