fix(mcp): improve log sanitization by replacing control characters with spaces

Author: mahmudunnabikajal

bin/niftycli-mcp.js

@@ -2,7 +2,7 @@
 import { startServer } from "../src/mcp/server.js";
 
 function sanitizeForLog(text) {
-  return String(text).replace(/[\x00-\x1f]+/g, " ");
+  return Array.from(String(text), (ch) => (ch.charCodeAt(0) < 0x20 ? " " : ch)).join("");
 }
 
 try {