#12 multi-device tiles + #5 native iOS transcript

#12 — same user on two devices now shows as two independent tiles (was: LiveKit
kicked the older connection, "audio jumps to whichever joined last"):
- LiveKit identity is now the per-connection mesh peerId, not the user id.
  /api/meetings/token + guest-token mint identity=peerId when the client supplies
  it (anti-hijack: never mint another live user's peerId). Web maps SFU tracks by
  identity==peerId, keeping peerIdForUid as a fallback for the transition/native.
- Mesh dedup (dropDupPeers) now keys on a stable per-device clientId (persisted,
  sent on meeting-join, echoed by the server) instead of user id — so two real
  devices keep separate tiles while a same-device reconnect ghost still collapses.
  Verified in a real browser: 2 devices -> 2 tiles; same-device reconnect -> 1.
- Native: plugin gains reconnectRoom(); after the native WebView joins the mesh it
  re-homes the LiveKit media onto its peerId identity. syncVideoTiles keys by peerId.
  Token-identity + anti-hijack + clientId echo verified by a server test.

#5 — iOS live transcript (WKWebView has no Web Speech API, so an iOS participant
was never transcribed; desktop already works):
- native-call plugin transcribes the local mic with SFSpeechRecognizer, fed by a
  LiveKit AudioRenderer on the local mic track (reuses the call's open mic — no 2nd
  AVAudioEngine). Finalized segments -> 'transcript' event -> web sends
  meeting-transcript (same server assembly as desktop). startSR/stopSR use the
  native recognizer on native calls; Web Speech API path unchanged elsewhere.
- NSSpeechRecognitionUsageDescription added to the iOS Info.plist.

Native pieces (#12 reconnect, #5 transcript) need a Codemagic build; the web+server
half is verified and deploys now (already fixes the reported laptop+phone case).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

mobile/scripts/ios-patch.sh

@@ -17,6 +17,7 @@ set_str NSCameraUsageDescription      "Biz Connect uses the camera for video cal
 set_str NSMicrophoneUsageDescription  "Biz Connect uses the microphone for voice and video calls."
 set_str NSPhotoLibraryUsageDescription      "Biz Connect needs photo access so you can send images in chat."
 set_str NSPhotoLibraryAddUsageDescription   "Biz Connect saves images and recordings you download to your photos."
+set_str NSSpeechRecognitionUsageDescription "Biz Connect uses speech recognition to create live meeting transcripts from your microphone."
 
 # Human-readable display name on the home screen.
 set_str CFBundleDisplayName "Biz Connect"
@@ -140,3 +141,4 @@ fi
 echo "Info.plist patched:"
 "$PB" -c "Print :NSCameraUsageDescription" "$PLIST"
 "$PB" -c "Print :NSMicrophoneUsageDescription" "$PLIST"
+"$PB" -c "Print :NSSpeechRecognitionUsageDescription" "$PLIST"