fix: Ctrl+C ora esce correttamente con signal handler

langcode.py

@@ -31,9 +31,19 @@ VERSION = "1.0.0"
 
 def cmd_chat(args):
     """Avvia l'agent in modalità chat interattiva"""
+    import signal
+    import sys
     from main import create_langcode_agent, process_command
     from langchain_core.messages import HumanMessage
 
+    # Signal handler for Ctrl+C
+    def handle_sigint(signum, frame):
+        print("\n\n👋 Arrivederci!")
+        sys.exit(0)
+    
+    # Register signal handler
+    signal.signal(signal.SIGINT, handle_sigint)
+
     print("🚀 Inizializzo LangCode Agent...")
 
     try: