Small UX idea for LLM profile setup: can we add a Test Connection button before Save? Right now, if the API key/model/provider details are wrong, the failure shows up later in a conversation, which can be frustrating because you may need to start over. A quick connectivity check could validate the key, provider, and model availability upfront.

As long as I know before I leave the page and start the conversation, it works for me

I'll have to finish this later, got to run to the dentist. I've got 2 approaches. The first has everything done in agent-canvas, the second adds an LLM verify endpoint to the agent server and has agent-canvas call this endpoint. I'm leaning towards option 2 at this point but will have both ready tonight.