[ENHANCEMENT] Openrouter Preset

[frkr]

Problem (one or two sentences)

On Openrouter I have preset models that only appears when use /models/user or using the openrouter_api_key.

Context (who is affected and when)

So. I have an @preset/flash that combines some configurations.

Desired behavior (conceptual, not technical)

Check an model that exists before declares it as not found

Constraints / preferences (optional)

No response

Request checklist

• I've searched existing Issues and Discussions for duplicates
• This describes a specific problem with clear context and impact

Zoo Code Task Links (optional)

No response

Acceptance criteria (optional)

No response

Proposed approach (optional)

No response

Trade-offs / risks (optional)

No response

[frkr]

Add a pullrequest

#1276