`bun run desktop-prod` (and its :run/:upgrade/:pill/:run:pill variants)
invoked `bash scripts/desktop-prod.sh` directly. On Windows, cmd and
PowerShell have no `bash` on PATH unless Git Bash happens to be there,
so the documented from-source install path died with a cryptic spawn
failure before printing anything — the exact first step in issue #282's
repro.
Add scripts/desktop-prod.mjs, a tiny launcher (runs under bun or node):
- macOS/Linux: execs the bash script unchanged — zero behavior change.
- Windows: locates Git Bash via `where.exe bash`, well-known Git for
Windows install paths, or derived from git.exe's location; explicitly
skips C:\Windows\System32\bash.exe (the WSL launcher, which would run
the script inside Linux and wipe/launch the wrong paths).
- No usable bash: prints an actionable error (install Git for Windows,
use `bun run desktop`, or use the installer) instead of a spawn error.
All flags are forwarded untouched and the child's exit code is
propagated. scripts/desktop-prod.sh itself is unchanged, and
docs/install/windows.md now lists Git for Windows as a prerequisite
for from-source installs.
Refs #282
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
