v8.2.0-dev.6

• Merge pull request #1506 from kaitranntt/kai/feat/1504-bar-install-ux
• Merge pull request #1505 from kaitranntt/kai/fix/1502-1503-bar-multiscreen
• fix(bar): stage downloads and swap so reinstall never strands the user
• fix(bar): verify server compat before Gatekeeper steps and harden reinstall
• fix(bar): stop install at the manual step when quarantine clearing fails
• fix(bar): harden install handoff per review
• fix(bar): capture click location synchronously before async panel anchoring
• feat(bar): one-flow install with quarantine automation and launch handoff
• fix(bar): keep menu bar panel on the clicked screen in multi-display setups