Every update failed at "Could not replace the existing files": the app
relaunches the installer via ShellExecute without a working directory, so
it inherited the app's CWD - which the Start Menu shortcut sets to
<InstallDir>\app. A process's current directory is locked by Windows, so
the installer blocked its own `app` -> `app.bak` rename. Retries and
reboots could not help.
- installer moves its CWD to %TEMP% at startup, and both relaunch sites
in the UI pass an explicit WorkingDirectory
- cache the release zip in %TEMP%\ClaudeDo-download-cache and reuse it on
a retry while its SHA-256 still matches, so a failed attempt no longer
costs another full download; drop it after a successful install, delete
a mismatching one, prune zips of other versions
- roll back a half-done stash: a leftover app.bak was deleted as a stale
stash on the next attempt, and that copy was the only one left
- name the blocked path in the error message
Release workflow now names the installer asset ClaudeDo.Installer.exe (no version) for a permanent download URL; it is still uploaded and checksummed on every release. App + worker keep the git tag version.
Removes the self-update preflight from App.OnStartup and deletes the now-dead SelfUpdater / SelfUpdatePromptWindow / SelfUpdateResult plus their tests. App-update detection is unaffected: the manifest records the release tag via DownloadAndExtractStep.
Updates the installer CLAUDE.md.