This PR implements automatic timeout functionality for turn-based casino games to prevent games from stalling indefinitely when players become inactive.

Changes Made

Core Features

• 2-minute timeout per player turn (configurable in GameSession)
• Visual countdown timer displayed in Discord embeds showing remaining time
• Automatic default actions performed when players time out:
  • Blackjack: Stand (conservative, safe play)
  • Rock Paper Scissors: Rock (standard default choice)
  • Poker: Confirm discard with no cards selected (keep all cards)
• Background monitoring service that checks all active games every 10 seconds

Technical Implementation

• Extended the IGameSession interface and GameSession<T> class with timeout properties:
  • PlayerTurnTimeout: Configurable timeout duration (default 2 minutes)
  • CurrentPlayerTurnStartTime: Tracks when current player's turn began
  • TimeRemaining: Calculates remaining time for current player
  • IsCurrentPlayerTimedOut: Determines if current player has exceeded timeout
• Added abstract GetDefaultAction() method to ACasinoGame<T> base class
• Implemented default actions in all three game types (Blackjack, RockPaperScissors, Poker)
• Created GameTimeoutService as a background service registered in the DI container
• Updated Discord embed generation to display timer information next to current player

User Experience

The timeout feature integrates seamlessly with existing gameplay:

Current Player: @User (⏱️ 1m 30s)  // Shows remaining time
Current Player: @User (⏱️ 45s)     // Countdown continues
Current Player: @User (⏰ TIME UP!) // When expired

After timeout, the default action is performed automatically and the game continues normally. AI players are excluded from timeouts as they act immediately.

Files Changed

• Domain layer: Updated game sessions, base game class, and all game implementations
• Service layer: Added GameTimeoutService and updated GameService
• Module layer: Enhanced CasinoSlashModule to track turn timing
• Discord layer: Updated all game-specific Discord sessions to show timer
• Dependency injection: Registered new service in Program.cs

The implementation maintains backward compatibility and follows the existing architecture patterns. Games that are already in progress will continue working normally, with timeout functionality applying to new games.

Fixes #348.

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.