Studio Code not responding to any dialog

### Quick summary

When entering a prompt in the Studio Code dialog and submitting, it appears as being treated for one second, then the screen goes back to its starting appearance. No response, no dialog history, just back to New conversation with the six example prompt buttons...

This happens on the new Linux version 1.15.0 (linux x64)

Note that the Platform select at be bottom of this issue report does not have Linux as an option.

### Steps to reproduce

1. Start a site
2. Go to the Studio Code tab
3. Enter any question or prompt from the preset buttons
4. Submit with Ctrl + Enter
5. See the short message about the prompt being processed disappear after about a second

### What you expected to happen

An AI response.

### What actually happened

The dialog returns to its default state without any response.

### Impact

One

### Available workarounds?

No but the app is still usable

### Platform

_No response_

### Logs or notes

Debian based Linux (Ubuntu 26.04), Studio version 1.15.0 (linux x64)

Reproduce the failure in the Studio Code tab on Linux x64 version 1.15.0 using a preset prompt and Ctrl + Enter. Trace the prompt-processing path from that entry point and verify that submitting a prompt produces an AI response and preserves the conversation instead of returning to New conversation.

Written by the indexing model from the issue text.