• Fixed SSO sign-in loop — when starting a new Google sign-in, the existing auth tab is now reused instead of opening a new one, preventing users from completing sign-in in an expired tab
• Extended SSO session timeout from 10 to 30 minutes to allow more time for Google consent screens

Build environment: Windows 10/11, Node.js 20.x, Python 3.12

Steps to reproduce Firefox package:
1. npm ci
2. node build/sync-runtime.mjs
3. node build/generate-manifest.mjs --profile market
4. python build/make-source-zip.py ← creates source zip
5. python -c "see build/rebuild-market-zips.ps1" for final firefox-extension.zip
(uses Python zipfile to ensure forward slashes in ZIP paths)

All JS files are human-readable and unmodified from src/runtime/.
Only manifest.json is generated from platform/manifests/base.json + overrides.
No minification or bundling is used.