[bug]: error listing agents (in the UI) when there are no models

[peterj]

need to re-reproduce it again, but I was getting "failed to fetch models" error in the UI when refreshing the main page when there were no model configs deployed. we should still show the "no agents yet" page instead of failing,

[gauravshinde1729]

I would like to work on this
/assign

[peterj]

thanks -- assigned to you!

[gauravshinde1729]

@peterj Can you please check this PR https://github.com/kagent-dev/kagent/pull/1944/changes
Thanks !