Both the in-app restart and the auto-update install previously
shelled out to cmd.exe so the new instance could wait for the old
one to release the singleton mutex and the locked exe file. On
some Windows configurations the `start ""` inside `cmd /c ...` can
flash a console window despite CREATE_NO_WINDOW + DETACHED_PROCESS
flags. The replacement spawns the child binary directly via
CreateProcessW; since the main exe is built with
windows_subsystem = "windows", no console is ever allocated.
- New `src/update/handoff.rs` exposes `spawn_detached`,
`wait_for_parent_exit`, and `cleanup_stale_old_exes`.
- New CLI flags `--wait-pid <pid>` and `--updated-to <version>`
parsed early in `main`; the child waits up to 5s on the parent
PID via OpenProcess+WaitForSingleObject before falling through
to a 3s mutex-acquisition retry.
- `restart_app` and `install::begin` both spawn detached children
using the new helper.
- Update install now uses MoveFileExW twice (rename running exe
sideways, then move staged exe into place with
MOVEFILE_REPLACE_EXISTING | MOVEFILE_COPY_ALLOWED so portable
installs on non-system drives still work). Rollback restores
the backup if either the swap OR the post-swap detached spawn
fails, and a MessageBoxW modal surfaces the backup path if the
rollback itself fails.
- First launch after an auto-update shows a blue-info tray
balloon "Updated to vX.Y.Z" via a new `tray::notify_info` (the
existing `tray::notify` is split into `notify_warning` +
`notify_info` sharing a `notify_inner`).
- Startup sweeps stale `<exe>.old.<pid>` siblings left by past
in-place updates.
- Three new `LocaleStrings` fields translated across all 8
supported locales (en/nl/es/fr/de/ja/ko/zh-TW).
Advisory artifacts produced by the three agents spawned to audit the
project. Code-reviewer found the P0/P1 set fixed in 1ef1bfa;
brainstormer ranked feature ideas; researcher surveyed the
self-update / code-signing / distribution space.
Replaces the "build from source only" Install section with a
Releases-page download path plus a SmartScreen note, and adds
docs/release-process.md so the tag-bump-build flow is captured for
future maintainers.
tiennm99