ChatMessageCapture

Thread-safe singleton that captures chat messages injected via the mixin.

The MCP command executor starts/stops capturing around command execution, then polls for resulting server feedback messages.

Functions

Called from the mixin when a chat message is added to the HUD.

Begins capturing messages. Clears any stale messages from the queue.

Stops capturing messages.

Blocks up to timeoutMs for a message, returns null if none arrives.