mcp(fix[_utils]): Log unexpected errors in handle_tool_errors

why: Generic exceptions were re-raised as ToolError without logging,
making it impossible to diagnose unexpected errors in server logs.
what:
- Add logger.exception() before re-raising generic Exception as ToolError

Author: tony

src/libtmux/mcp/_utils.py

@@ -387,6 +387,7 @@ def wrapper(*args: P.args, **kwargs: P.kwargs) -> R:
             msg = f"tmux error: {e}"
             raise ToolError(msg) from e
         except Exception as e:
+            logger.exception("unexpected error in MCP tool %s", fn.__name__)
             msg = f"Unexpected error: {type(e).__name__}: {e}"
             raise ToolError(msg) from e