Fixes
- Update banner Download button now works (ref #190). The scope guarding the
openUrlIPC command used a glob pattern that rejected multi-segment GitHub release URLs, so clicking Download did nothing. Widened the scope so release URLs pass through to the OS browser. - No more duplicate banner. Checking for updates no longer stacks a blue "Update available" banner on top of the persistent green one — the green banner already shows latest + current version with the Download CTA, so the blue copy was redundant.