feat(tray): 增加 windows 登录启动选项

[ByteColtX]

Summary

• add a Windows Run registry-backed Start at login platform helper
• add a Start at login check item to the Windows tray menu
• verify Windows target compilation and clippy for the new path

Tests

• cargo fmt --check
• cargo test
• cargo clippy --all-targets -- -D warnings
• cargo check --target x86_64-pc-windows-msvc
• cargo clippy --target x86_64-pc-windows-msvc --all-targets -- -D warnings