.changelog/3399.md
PVWebServerManager, a Swift actor that can coordinate between the legacy GCDWebServer and the new Hummingbird 2-based PVModernWebServer. In this release it defaults to the legacy GCDWebServer unless you explicitly enable the modern backend via the Settings › Advanced › Feature Flags debug override (modernWebServer = true). The new server delivers a dark-mode-aware drag-and-drop HTML file manager, async/await start/stop, WebDAV class-1 support, and proper multipart upload with the same PVWebServer*Notification constants. Part of Epic #2758.modernWebServer Feature Flag — Added to PVFeatureFlags/features.json and surfaced in Settings for future rollout; it currently defaults to false, so the legacy ObjC server remains active unless you override it for debugging. Full PVFeatureFlags/features.json integration is planned for a follow-up PR.