Requirement	Priority	Dependency	Priority 1-2-3
5.1 View inbound attachments in-app. PDF and image files render in-app preview; other file types offer download. (Feeds goal G9)	Must	—	1
5.2 Send outbound attachments as real email attachments (not URL workaround). Until the email API supports this, outbound attachments are unavailable. (Feeds G1, G9)	Must	Blocked on email API enhancement	1
5.3 Attachment file size and count limits are enforced with clear feedback to the user	Should	—