Prefetch opening over WebSocket from the conversations list before navigation, with prepared-session handoff into the chat screen. Add a single-slot background pool so leaving chat (in-app) keeps the last session socket with UI callbacks stripped; dispose on app background and reconnect after resume when the chat screen is mounted. Tear down pooled sockets on logout, purge, and conversation delete. RealtimeSession supports attachUiCallbacks and idempotent dispose, and the chat composer hides the connection notice while connecting if assistant history already exists. Fix pause handler wiring in the conversation screen.
Co-authored-by: Cursor <cursoragent@cursor.com>
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