[Due for payment 2026-06-08] Add AI Prompt section to Profile

[puneetlath]

Part of the Custom workflow agents project

Main issue: https://github.com/Expensify/Expensify/issues/614622
Doc section: https://expensify.enterprise.slack.com/docs/T03SC9DTT/F0AKV1FPD41?focus_section_id=temp:C:PDZa4644f0f9a49433fa55e205e5

Feature Description

Add an AI prompt section to the agent's own profile that can be accessed when copiloting into the agent account.

Manual Test Steps

Since the back-end API commands are not yet implemented, this can be tested while offline.

1. Create an agent with a prompt
2. Copilot into the agent's account
3. Go to the Profile section of account settings
4. Verify you see the "AI Prompt" section with the current prompt in an uneditable state
5. Click "edit prompt"
6. Verify the text box becomes editable
7. Edit the text and save the new promprt
8. Verify the text box becomes uneditable again
9. Return into the owner account
10. Go to the Agents section of the owner account
11. Click on the agent you just edited
12. Verify the updated prompt is shown

Automated Tests

Same as manual

Issue Owner

Current Issue Owner: @mallenexpensify

[NicolasBonet]

Not overdue

[NicolasBonet]

WIP should be out today