Let errors propagate to the caller instead of catching locally,
simplify the request body construction, and snapshot perf.timing
before the fetch to avoid a TOCTOU race.
The PerfState interface was only used twice, so inline it. Move
onChange/onHostLog subscriptions above the route definitions to keep
side-effects grouped. Skip perf.now() in proxy when timing is off.
Colocate the setter with its variable for readability. Remove the
conditional around performance.now() since the call is negligible
and simplifies the timing logic.
Early-return on invalid input, then unify the GET/POST and display
paths so each concern is handled once instead of per-subcommand.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
