The status-line renderer's #lookupPr method called `gh pr view` through
Bun's raw `$` shell with no signal, no timeout, and no non-interactive
environment. A stalled `gh` process (keychain prompt, network hang, auth
deadlock) wedged the await forever; because #prLookupInFlight was set
before the call and never reset, subsequent renders skipped the lookup
and the child leaked indefinitely.
Route the lookup through the existing `git.github.run` helper with
`AbortSignal.timeout(git.GIT_COMMAND_TIMEOUT_MS)` so the child inherits
GH_NON_INTERACTIVE_ENV (disabling terminal and keychain prompts) and
receives SIGTERM on the standard 5-minute deadline. Non-zero exit still
falls through to the null cache, preserving the failure-tolerant
behavior.
Fixes#4234
roboomp
8f6bd66a5f