Merge main and reduce the change to the defect that reproduces: the server's
synchronous login-shell probes (env snapshot and command -v for opencode,
node, bun) ran with no timeout, so a slow or interactive rc file held startup
until it returned — on macOS that is what made a brew-installed opencode look
undetected from a Dock launch. Every probe now carries the same 5s bound the
Electron shell probe already uses and falls through on overrun; the known
install locations already include both Homebrew prefixes.
The non-login command -v fast path and the reproduction script are dropped:
a plain sh inherits the same PATH the resolver has already walked.
Closes#1720
Bohdan Triapitsyn
1151c40f13