bug: Missing retry button for first prompt after API failure

[eckartal]

Problem

• When an API failure occurs on the first prompt in a chat, there is no retry button, unlike later prompts
• Users must manually edit and resend, which is inconvenient.
• Source: https://www.reddit.com/r/LocalLLaMA/comments/1isaf0z/comment/mdfon3m/

Steps to Reproduce

• Start a new chat and send a prompt.
• Trigger an API failure (e.g., local TabbyAPI is down).
• Notice that only edit/delete options appear—no retry button.

Expected Behavior

• A retry button should be available for the first prompt, just like later ones.

Environment

• Platform: Mac
• API Setup: Local TabbyAPI

[louis-menlo]

There should be a "Generate button" when the last api call is failed (v0.6.6)