[4o3F]

Summary

Moves the Windows session-end adapter, which has no Tauri dependency, out of backend/tauri into nyanpasu-platform. The GUI now only composes it, and a future CLI frontend can reuse it. Stacks on #6119. Refs #6054.

Changes

• backend/tauri/src/shutdown_hook.rs moves to nyanpasu-platform/src/session_end/windows.rs: the hidden Win32 window and its 2 Windows tests.
• backend/tauri/src/utils/session_end.rs moves to nyanpasu-platform/src/session_end/protocol.rs: the pure message decision, ShutdownCompletion and its 5 tests.
• Callers import the new location directly; no re-export shims remain in backend/tauri.
• The 30-second cleanup wait is now a parameter supplied by setup.rs. The first confirmation still fixes the deadline, and later confirmations keep it.
• Otherwise no behavior change. The moved files differ from the originals only in imports, visibility, doc comments and that parameter.

Verification

• Passing: platform session_end tests (5), clash-nyanpasu tests (184; the 5 moved tests now run in platform), clippy, rustfmt, lint:architecture-ledger and lint:backend-boundaries.
• The platform suite has only the known environment-specific proxy-port failure.
• The Windows code was not compiled locally (no mingw for aws-lc-sys), so the window tests need Windows CI.

CLI note (not implemented)

A future console frontend should treat CTRL_C/CTRL_BREAK as a normal stop. It should treat CTRL_CLOSE/CTRL_LOGOFF/CTRL_SHUTDOWN as a confirmed session end and block in the handler until cleanup is done. A process that loads user32 stops receiving the logoff and shutdown console events, so a CLI also needs this hidden-window hook.

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
backend/nyanpasu-platform/src/session_end/windows.rs	32% smaller
backend/nyanpasu-platform/src/session_end/protocol.rs	29% smaller
backend/Cargo.lock	Unsupported file format
backend/nyanpasu-platform/Cargo.toml	Unsupported file format
backend/nyanpasu-platform/src/lib.rs	0% smaller
backend/nyanpasu-platform/src/session_end/mod.rs	0% smaller
backend/tauri/Cargo.toml	Unsupported file format
backend/tauri/src/lib.rs	0% smaller
backend/tauri/src/setup.rs	0% smaller
backend/tauri/src/setup_tests.rs	0% smaller
backend/tauri/src/utils/exit.rs	0% smaller
backend/tauri/src/utils/mod.rs	0% smaller