Add clipboard history to shared inboxes

Problem
When multiple team members work in a shared inbox, each person has their own independent clipboard history, making it difficult to efficiently share and reuse cut/paste items across the team.

Request
Provide a shared clipboard feature (similar to Windows clipboard history) that stores the last ~10 cut and paste items and is accessible to all team members in a shared inbox, allowing them to click, drag, and insert previously copied content.