Deck export/import as a portable artifact

[rlnorthcutt]

Problem statement

A deck's contents currently aren't portable: there's no way to archive one, move it to another machine, or hand it to a client as a self-contained artifact.

What success looks like

A deck can be exported to a portable artifact and re-imported elsewhere, making "this is yours to keep" demonstrable rather than asserted.

Impacted repositories

• omnideck

Acceptance criteria

• A deck can be exported and re-imported on a different machine, preserving its contents.

Related

• Extends the existing backup capability rather than building parallel infrastructure. Open question raised alongside this: could the same mechanism be used for syncing a deck between a user's own devices? Worth a design pass, not scoped into this epic yet.