Replaces the zip option. Copy now offers two real destinations, both filing
under <party>/<received|issued>/<transmittal>/<name>:
- Server archive — PUTs each file into a zddc-server over HTTP via the
zddc-source HttpDirectoryHandle (mkdir as needed). Offered only over http(s);
prompts for the archive URL (guessed from the current path's archive/ segment).
- Local folder — the File System Access picker (choose archive/ to file directly).
Both reuse the one copy engine and are efficiently resumable: copyOne probes the
target with a cheap stat/HEAD and SKIPS anything already present — no source
read, no hashing — so a re-run after an interruption only does what's left.
Canonical ZDDC names + the WORM archive mean an existing name is the same
document, so we never overwrite (the old content-diff path is dropped).
Tests: re-run skips an existing local target; PUT into a server-style handle then
resume-skips it (52 green).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
ZDDC
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