Add managed UIKit iOS client

PROGRESS.md

@@ -10,6 +10,20 @@ up instantly. Newest status at the top.
 
 ## ▶ Where we left off / next action
 
+- **In progress (2026-09-19): managed iOS/UIKit replacement.** Chose native UIKit over MAUI
+  to preserve direct AVAudioSession/AVAudioEngine control and native VoiceOver semantics.
+  Added the .NET 10 iOS application, App Group profile/TOFU/Keychain migration, saved-server
+  and connected channel/chat/settings flows, managed client event/reconnect handling, and
+  foreground microphone/playback through an allocation-free callback and bounded PCM rings.
+  The Opus/RNNoise shim now cross-compiles as merged static device and simulator archives and
+  binds through `__Internal`. The Swift ReplayKit upload extension is retained, its ring ABI
+  is documented/versioned, and the managed pump drains it into a screen-audio stream; MSBuild
+  builds and embeds the appex. Corrected the historical App Group and extension bundle IDs.
+  CI now installs the iOS workload and builds both managed Apple clients. **Next:** run the
+  complete managed/native suite and Release/device packaging, then finish the remaining
+  advanced administration/audio controls and the physical-device VoiceOver/live-call matrix
+  before treating Swift as removable.
+
 - **In progress (2026-09-19): managed macOS functional-parity checkpoint.** Extended the
   .NET AppKit client across the remaining Swift desktop surface: persistent audio and
   notification settings; VAD, focus-scoped configurable PTT and always-on modes; input,