Make session time arbitrary, agent game ending monologue

[Gawor270]

No description provided.

[linear]

FCE-2432 Implement game timer when using gemini

[Copilot]

Pull request overview

This PR implements a configurable game time limit with automatic agent announcements when time expires, and adds session resumption with automatic reconnection for the Gemini voice agent.

• Adds timeout mechanism to automatically announce game time expiration and guide the agent to end the game
• Implements session resumption and auto-reconnection logic for Gemini sessions to handle connection interruptions
• Updates the endGame function description to clarify when it should be called by the agent

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
deep-sea-stories/packages/backend/src/game/session.ts	Adds announceTimeExpired() method to mute the agent and notify it when game time limit is reached
deep-sea-stories/packages/backend/src/game/room.ts	Implements game timeout using setTimeout and cleans up timeout on game stop
deep-sea-stories/packages/backend/src/agent/session.ts	Adds announceTimeExpired() method to the VoiceAgentSession interface
deep-sea-stories/packages/backend/src/agent/gemini/session.ts	Implements timeout announcement, session resumption via handle, auto-reconnection on unexpected closure, and improved state management with opening/reconnecting flags
deep-sea-stories/packages/backend/src/agent/elevenlabs/session.ts	Adds stub implementation of announceTimeExpired() for ElevenLabs session (handled by platform)

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[AHGIJMKLKKZNPJKQR]

The timeout didn't work.
I also was able to undeafen the agent while it was saying the closing speech.
Maybe it would be better to "server-deafen" the agent instead, by just not forwarding the audio tracks to it when the game timed out