fix(cli): disable Ink's built-in exitOnCtrlC so our handler runs

Ink's render() defaults to exitOnCtrlC:true, which terminates the
process before useInput ever fires. Pass exitOnCtrlC:false so the
double-press logic in TuiApp (clear → hint → exit) takes effect.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/cli/src/cli.ts

@@ -177,6 +177,7 @@ program
           agentName: agentName ?? undefined,
           projectId,
         }),
+        { exitOnCtrlC: false },
       );
     },
   );