fix: warning text cli correctness issue (#74964)

Co-authored-by: openclaw-clawsweeper[bot] <280122609+openclaw-clawsweeper[bot]@users.noreply.github.com>

src/cli/cron-cli.test.ts

@@ -569,7 +569,7 @@ describe("cron cli", () => {
       expect.stringContaining("No --agent specified"),
     );
     expect(defaultRuntime.error).toHaveBeenCalledWith(
-      expect.stringContaining("default agent (main)"),
+      expect.stringContaining("configured default agent"),
     );
   });
 

src/cli/cron-cli/register.cron-add.ts

@@ -235,7 +235,7 @@ export function registerCronAddCommand(cron: Command) {
           if (payload.kind === "agentTurn" && !agentId) {
             defaultRuntime.error(
               theme.warn(
-                "No --agent specified; the job will run with the default agent (main). " +
+                "No --agent specified; the job will run with the configured default agent. " +
                   "Specify --agent to choose a specific agent.",
               ),
             );