Chats: Edited Text Remains in Prompt After Canceling

## Summary:
Canceled edits still show in the prompt field.

## Steps to Reproduce:

1. Login to the application
2. Go to conversations - click on any
3. Edit a chat
4. Click cancel
5. Re-open edit mode

## Expected Result:
Prompt should be reset.

## Actual Result:
Old edits remain.

## Impact:
Confusing for users.

## Severity:
Low
