[oliverlaz]

Ticket: https://linear.app/stream/issue/RN-524

What

• @stream-io/calypso ^0.3.0 → @stream-io/stream-agents ^0.4.1 in ExpoChatGPTSample and ExpoCrewAssistant (the same JS SDK, renamed). Imports move to @stream-io/stream-agents and /chat. stream-chat stays on 9.55; /chat supports 9 and 10. .yarnrc.yml swaps calypso for stream-agents on the age-gate allowlist, since 0.4.1 is newer than three days.
• Each example's agent/agentChat.ts and agent/agentTransport.ts are deleted. contexts/AppContext.tsx builds the controller from new AgentChat({ sessionId, open }) and agentChatTransport(chat, { adapt, images, reasoningEffort }), with actions: { edit: false, regenerate: false }. The transport sends the controller's messageId as requestId and a generated-UI action from custom.uiAction; a failed reply shows the kit's translated error.
• agent/conversation.ts (new, per app): the Chat/ChatState types over LocalMessage, chatStore(chat) for useStateStore (typed for stream-chat's StateStore; the SDK's store has the same shape), a React key per chat, and whenUsed, which refreshes the drawer each time a new conversation's session is used (a first question that never reached the router has its session deleted, and the retry creates another).
• Tools.register's run is (input, call) in 0.4 and the SDK stops waiting on a cancelled call itself, so deviceTools.ts drops the abort signal.

ExpoCrewAssistant keeps in the app what the SDK doesn't do:

• DISPLAY_TITLES for the backend's tool steps, by wrapping adapt.
• "Crew is getting things ready" while the agent opens a conversation about an event (awaitingAgent, now on the context, derived from whether a reply has shown).
• lastRequest for "Try again" (questions, events and voice memos). A composer retry doesn't overwrite it, so a generated-UI action keeps its uiAction.
• Voice memos and event-opened conversations call chat.use() once the router or backend has the request, so they're kept and listed, and a failed one isn't left behind.
• On returning to the foreground, chat.prepare() when the session's socket is no longer live.

Checks

• yarn lint
• yarn workspace expochatgptsample typecheck / yarn workspace expocrewassistant typecheck
• Run on a simulator against the local router (not done: no dev client build and no Stream API key in this checkout)