I’d love to see a more fluid drag-and-drop workflow for labels in Proton Mail.

In list view, drag a label from the left sidebar onto a message to apply that label. If multiple messages are selected, dropping the label onto one of the selected messages would apply it to all selected messages. When viewing an individual email, dragging a label onto the open message would apply it there as well.

This would make organizing mail much faster and more intuitive, especially for users who manage workflows heavily with labels. It also feels like a very natural desktop-style interaction that many users already expect.