2005424 - Limit data uris for user messages

Status: NEW

(Core :: Machine Learning: Frontend, task)

Description

[:omarg]

Limit, or filter out, data uris when saving user messages in chat conversations.

https://phabricator.services.mozilla.com/D274644#inline-1503028

From PRD:

Large Copy/Paste Inputs

• When users copy/paste a large amount (exact number TBD) of text into the chat input box, turn the text into an attachment as context for LLM input.
• Support emoji and rich formatting such as bullets, bold, italic, etc. Image and other media is out of scope.
• User can click on the attachment to review the text
• User can click on the attachment to in-line edit the text
• Display an error message when input exceeds max limitations
• Prevent PII being passed into the LLM