- App.tsx and main.tsx ErrorBoundary gate rendererReady() on
VITE_FORCE_BOOT_STALL build env var. When set, the ping is suppressed
so the main-process boot timer fires (exercising the renderer-stalled
recovery path without hand-editing source).
- vite-env.d.ts declares the env var type so TS doesn't complain.
- scripts/smoke-recovery.sh automates scenarios 2 (bad URL → load-failed)
and 4 (forced stall → renderer-stalled), grepping stderr for the
[recovery] entered: ... lines added by the prior commit. Backs up and
restores the user's instance-url.json. Manual scenarios documented in
the script header.