feat(mobile): add huddles with LiveKit
Mirrors the desktop huddle window: tap the headphones button on a stream to fetch a LiveKit token from Orion and join a video room. Active huddles show a red badge on the stream card (participant count) and a red Join pill in the stream top bar — both driven by huddle_active_participants synced from the LiveKit webhook. The HuddleScreen lives at its own route (not a modal/window): video tile grid with placeholders for camera-off, mic/camera toggles, and a leave button. Adds the LiveKit RN SDK plus the WebRTC + LiveKit Expo config plugins for prebuild. https://claude.ai/code/session_01Po5tAD17MXhnqGQ9hKh6PC
This commit is contained in: