v0.1.0-alpha.18

Added

• Cross-machine card sharing (end-to-end encrypted). Two new pills sit next to the dropzone — Send and Receive. Drag a card onto Send and it expands to the machines you've added (plus any groups); drop on one to send it there. Cards others send you land in Receive, which shows who they're from and when, flashes on arrival, and tracks an unread count. Set it up in Settings → Card Sharing: turn it on, share your code, add recipients by their code (name them however you like), and optionally group several recipients for one-drop sends. Everything is end-to-end encrypted — the relay server only ever sees opaque ciphertext, never your cards, who sent them, or to whom — and cards are deleted from the server after 3 hours. Desktop only.