Post-migration RenderJS/JS audit follow-up (plan drifting-yawning-flurry):

A — correctness:
- gadget_jio.js: createJio now returns an RSVP.Queue (RJS-002).
- gadget_zip_loader.js: error-swallowing .push(console.log, console.log)
  replaced with CancellationError-aware rethrow; RSVP.Queue() -> new
  RSVP.Queue(); both submit callbacks now return the import promise.
- import.js (4 sites) / compare.js (5 sites): empty .push(undefined,
  function(){}) swallows now console.warn the cleanup/best-effort failure
  instead of dropping it silently (primary err still surfaced via logStatus).
- editor.js: throw new Error(...) instead of a string.

B — minor cleanups:
- editor.js: .style.display instead of clobbering cssText.
- crib-sw-gadget.js: == -> ===, new RSVP.Queue(), header mirrored.
- gadget_interface.js: removed dead commented error-handler.
- save_load.js: magnet textarea writes .value not .textContent.

C — header hygiene (/*global*/ aligned to usage): router (+loopEventListener),
add (dropped unused jIO param), snapshots (removed stale blobToDataUrl),
landing (/*globals*/->/*global*/, completed). Cross-script window helpers
kept as bare globals (not IIFE-injected) to avoid undefined-at-eval capture.

D — torrent migration: gadget_cribjs_page_torrent.js now holds the list +
copy feedback in this.state (torrent_view, copy_feedback, render_timestamp);
the polling service and click handlers call changeState, and onStateChange is
the only DOM site. Closes the one remaining state-pattern gap.

Tests: new test/playwright/cribjs_torrent_checks.py (7 checks) verifies the
migration end-to-end (empty-in-HTML summary becomes populated only via
onStateChange). Null-guarded three wait_for_function predicates in
cribjs_compare_checks.py that could deref a transiently-absent .compare-status.

Verified live: deploy verify OK; torrent 7/7, smoke 22/22, QUnit 113/113,
export 12/12, import 15/15, compare 15/15; import.js + compare.js JSLint clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>