v0.13.0

Changed

• Extract shared utilities to src/shared/: claude-binary, tool-labels, image-type — eliminate code duplication across modules
• Replace string concatenation with string[] for text/thinking buffers in agent loop
• Replace polling-based card creation with Promise-based approach in CardKit controller
• Tighten types: replace any with proper types across config, cardkit, claude modules
• Add null safety for getReadableStream calls in download module
• Include appId in token cache to prevent cross-profile token reuse

Fixed

• Add try/catch for all JSON.parse calls in message handler
• Add buffer truncation in flush controller to prevent unbounded memory growth
• Fix async signal handler (SIGINT/SIGTERM) to properly catch errors
• Add error logging for WebSocket connection and bot info fetch failures