Retire legacy sources and verify managed iOS deployment

docs/voice.md

@@ -324,7 +324,7 @@ independent.
   chose not to denoise his mic, Sam can locally suppress Alex's background noise without
   affecting how anyone else hears Alex.
 
-**Backend: RNNoise** (vendored in [`third_party/rnnoise/`](../third_party/rnnoise), BSD-3 + CC0).
+**Backend: RNNoise** (vendored in [`native/rnnoise/`](../native/rnnoise), BSD-3 + CC0).
 The original plan was WebRTC's APM, but `webrtc-audio-processing` has no working Windows/MSVC
 build (see §8). RNNoise is a small, dependency-free C library — a hybrid DSP/RNN speech denoiser
 that runs ~60× faster than real time. Both NR paths share one `ApmProcessor` implementation
@@ -437,14 +437,14 @@ user (exactly like macOS/Windows), and no credentials are ever persisted to disk
 
 - The user starts a broadcast from Control Center's screen-record button; we surface it via
   `RPSystemBroadcastPickerView` from inside the app (`VoiceControlsView`) for one-tap start.
-- The **Broadcast Upload Extension** (`clients/apple/iOS/VoiceCatBroadcast/SampleHandler.swift`)
+- The **Broadcast Upload Extension** (`native/apple/broadcast/SampleHandler.swift`)
   receives `RPSampleBufferType.audioApp` (system/app audio), `.audioMic`, and `.video`. We
   consume **`.audioApp`** only and drop video + mic — video is what blows the **~50 MB**
   extension memory budget, so an audio-only consumer stays comfortably inside it. The extension
-  does **not** link `libvoicecat`.
+  does **not** link the managed host or native media shim.
 - The extension converts each chunk to the core's canonical format (48 kHz int16 stereo, via
   `AVAudioConverter`) and writes it into a lock-free single-producer/single-consumer ring in a
-  shared **App Group** mmap'd file (`clients/apple/iOS/Shared/BroadcastAudioRing.swift`). It
+  shared **App Group** mmap'd file (`native/apple/broadcast/BroadcastAudioRing.swift`). It
   posts Darwin notifications on start/stop so the host reacts promptly.
 - The **host app** owns the stream: its `BroadcastAudioPump` announces the `SCREEN_AUDIO`
   stream over the control channel (`StreamAnnounce`), drains the ring, and calls