Remove embedded music player

The music feature is retired: delete the Media tab, MediaAPI,
MediaPlayerController, PinnedMediaResourceLoader, MediaPanelView, the
media_state control publish, media scope handling in VoiceSession, the
volume setting, and all media tests. App is now Talk + Activity tabs.

Backend media API in hope-voice-api is untouched (still serves the web UI).

README.md

@@ -1,19 +1,19 @@
 # Voice — iOS client for Hope Voice
 
 Native SwiftUI iOS app (iOS 17+) that talks to the [Hope Voice](https://github.com/) agent:
-voice/text conversation, transcript history, voice & model pickers, media player, and a
-background-tasks panel. Uses `hope-voice-api`, including cached AAC conversion for iOS music playback.
+voice/text conversation, transcript history, voice & model pickers, and a background-tasks
+panel. Uses `hope-voice-api`.
 
 > **Status:** Core functionality is implemented and verified in simulator to the extent the
-> environment allows. Full device qualification (mic capture, audible media playback,
-> interruption behavior) remains pending. The native Talk/Music/Activity redesign is implemented —
+> environment allows. Full device qualification (mic capture, interruption behavior)
+> remains pending. The native Talk/Activity redesign is implemented —
 > see [PLAN.md](PLAN.md) and [docs/DEVICE_TESTING.md](docs/DEVICE_TESTING.md).
 
 ## Prerequisites
 
 - Xcode 16+ (Swift 6), iOS 17 simulator or a real iPhone on the LAN.
 - [xcodegen](https://github.com/yonaskolb/XcodeGen) (`brew install xcodegen`).
-- The `voice` container running on Unraid (LiveKit + token server + media API).
+- The `voice` container running on Unraid (LiveKit + token server).
 - Mic: the simulator mic is unreliable in this environment (CoreAudio `-4010`, 0 input
   channels) — voice mode needs a real device. If the simulator was wiped, grant permission
   first: `xcrun simctl privacy booted grant microphone dev.shane.voice`.
@@ -33,7 +33,7 @@ To run in the simulator, use Xcode or `xcrun simctl` with the built app.
 
 Default base URL is `https://192.168.86.2:9178` (see `Sources/App/SettingsStore.swift`).
 Change it at runtime in **Settings → Server URL** (the app disconnects and recreates the
-session when idle). The app derives LiveKit signaling and media endpoints from this base URL.
+session when idle). The app derives the LiveKit signaling endpoint from this base URL.
 
 ### TLS cert pinning
 
@@ -46,7 +46,7 @@ openssl s_client -connect 192.168.86.2:9178 </dev/null 2>/dev/null \
   | openssl x509 -outform der | openssl dgst -sha256
 ```
 
-Paste the new hash into `TLSPinning.pinnedCertSHA256Hex`. Until you do, token/media calls
+Paste the new hash into `TLSPinning.pinnedCertSHA256Hex`. Until you do, token calls
 fail with a pin mismatch (not a network error).
 
 ## Features
@@ -58,10 +58,6 @@ fail with a pin mismatch (not a network error).
   stripping, last-50 history persisted to UserDefaults, clear button.
 - **Voice & model pickers** — 13 Azure TTS voices; LLM models from the agent's `models`
   message. Both persist and sync on join (`set_voice`/`set_model`).
-- **Media player** — now-playing card (art/title/channel/status), transport (play/pause,
-  ±10 s, stop), seek + volume sliders, search with "in library" tags, agent-offered choices,
-  library list (play/remove), add-stream form. AVPlayer-backed with a pinned-TLS Range proxy;
-  1.5 s `/state` polling and full web-parity reconciliation/reporting.
 - **Activity tab** — live `task_event` updates (steps, result, error) with an active
   count badge on the tab.
 
@@ -69,11 +65,9 @@ fail with a pin mismatch (not a network error).
 
 - **Simulator mic**: CoreAudio returns `-4010` (no usable input source) in this environment;
   voice capture must be verified on a real device. Text mode works in the simulator.
-- **Music compatibility**: library WebM files are requested as cached AAC on iOS.
-  This requires the deployed backend compatibility patch; see [deployment](docs/DEPLOYMENT.md).
 - **Cert pin rotation**: see above — re-export the pin after each server cert regeneration.
 - **LiveKit signaling** uses plain `ws://192.168.86.2:7880` (not wss) because the Swift SDK
-  cannot trust the self-signed cert on its WebSocket; token + media still go over pinned TLS.
+  cannot trust the self-signed cert on its WebSocket; token calls still go over pinned TLS.
 
 ## Docs