[Reasoning] Don't open and close when showing old message

[bestickley]

In my chat app built with AI Elements, when a user reloads a chat with a reasoning message, the reasoning message by default show open for a split second then closes. This behavior makes sense when the message is streaming in (to show something to the user while waiting), but doesn't make sense IMO to be shown for older messages when they're being reloaded. I think the fix for this would be to remove defaultOpen from this line:

ai-elements/packages/elements/src/reasoning.tsx

Line 81 in ecc0347

if (defaultOpen && !isStreaming && isOpen && !hasAutoClosed) {

I tried changing defaultOpen={false} but this results in streamed in new messages not showing the reasoning which I want.

[songkeys]

I used an isStreaming attr to determine if it's should be open