Issue Summary

When a user creates a card via email-to-board, and it's summarized by AI, then pressing shift while viewing the email preview triggers a loading animation that hides the original email content.

Steps to Reproduce

1. Open a board
2. Copy the email-to-board address from the board menu
3. Confirm Summarize with AI is enabled for email-to-board
4. Send an email with enough content to be summarized to the board's email-to-board address
5. Note that the card shows "AI is working on your card" while summarization happens. Wait until it finishes, then open the card
6.  select View in the Created from email section
7. Press shift

Expected Results

The email preview remains visible

Actual Results

The email preview changes to a loading animation, which persists until the preview is closed

Workaround

Don't press any keyboard shortcuts that use the shift key while viewing the original content of an email (screenshots, for example)