fix: EnhancedCLI timeout e fallback a CLI semplice

- Rimosso CursorShape.BEAM che causa hang su alcuni terminali
- Aggiunto timeout 30s con fallback a CLI semplice
- Cattura KeyboardInterrupt, EOFError, OSError per hang
- Signal handler per Ctrl+C in EnhancedCLI

enhanced_cli.py

@@ -428,7 +428,6 @@ class EnhancedCLI:
             key_bindings=self.key_bindings,
             auto_suggest=AutoSuggestFromHistory(),
             multiline=True,
-            cursor=CursorShape.BEAM,
             mouse_support=self.enable_mouse,
         )
     
@@ -656,6 +655,16 @@ class EnhancedCLI:
         Args:
             agent_callback: Function that takes user input and returns agent response
         """
+        import signal
+        import sys
+        
+        # Register signal handler for Ctrl+C
+        def handle_sigint(signum, frame):
+            print("\n\n👋 Arrivederci!")
+            sys.exit(0)
+        
+        signal.signal(signal.SIGINT, handle_sigint)
+        
         # Print welcome
         print(self.welcome_message)