4.16.0-alpha.0

First alpha of the 4.16.0 line.

✨ Improvements

• Workspace tabs as a display option — new default layout (#3394)
• Screen picker now opens on the originating popout window; concurrent capture requests are queued (#3399)
• Cmd+, shortcut opens Preferences on macOS (#3340)

🐛 Fixes

• Sidebar tooltip crash in shortcut formatting (#3326)
• Supported-versions hardening: exception scoping, malformed enforcement dates, and alignment with the real /api/info contract (#3404, #3407, #3406 — also shipped in 4.15.3)
• Startup screen-capture enumeration no longer opens the Wayland picker on launch (#3400 — also in 4.15.3)

🔒 Security

• Permission requests (geolocation/notifications/fullscreen) bound to known server origin (#3395)
• Non-http(s) main-frame navigation blocked in the server webview (#3397)
• Session data cleared on logout (#3398)
• Tightened CSP on local renderer windows (#3316)

🔧 Internal

• React 18.3 → 19 (#3384)
• Fuselage 0.78 → 0.80 (#3383)
• Expanded test coverage across preload and modules (#3393)
• Translation updates (#3392)
• Silent installation guide for enterprise deployments (#3178)