0.1.16 — hosted app moved to app.bettrcomms.com

The hosted app's primary domain moved from bettrcomms-production.up.railway.app to app.bettrcomms.com. Install this build to keep the desktop app working — the previous domain no longer accepts non-GET API calls or WebSocket connections from an older installed build.

Also introduces the first version of a selective forwarding unit (SFU) for group calls, deployed alongside the existing direct peer-to-peer path. Not yet used by default; direct peer-to-peer calling is unchanged.

Unsigned, non-notarized builds — Windows SmartScreen and macOS Gatekeeper will warn on first launch.

• Windows: BetterComms_0.1.16_x64-setup.exe (NSIS) or BetterComms_0.1.16_x64_en-US.msi
• macOS Apple Silicon: BetterComms_0.1.16_aarch64.dmg
• macOS Intel: BetterComms_0.1.16_x64.dmg

Full notes: docs/RELEASE_NOTES.md