Briar v1.2.104

What's Changed

• fix(ios): restore mobile CI on Swift 6 by @siisee11 in #894
• feat: release iOS TestFlight 1.2.103 build 1 by @siisee11 in #895
• fix: mark issue replies read from issue detail by @wordbricks-dev in #896
• 완료 이슈의 마지막 Worker 할당 유지 by @siisee11 in #897
• feat: 채널 동기화를 SSE + delta 방식으로 전환 by @siisee11 in #898
• Optimize Project Agent session synchronization by @wordbricks-dev in #899
• Add on-demand Organization Agent context by @wordbricks-dev in #900
• Optimize dashboard and tray polling by @wordbricks-dev in #901
• Enforce migration-first Worker claims by @wordbricks-dev in #902
• chore: release v1.2.104 by @wordbricks-dev in #903

Full Changelog: v1.2.103...v1.2.104