The portable shared-clipboard plane in punktfunk-core, all behind the `quic`
feature (design/clipboard-and-file-transfer.md §3):
- Control messages 0x40–0x44 (ClipControl / ClipOffer / ClipFetch...) and the
HOST_CAP_CLIPBOARD capability bit, negotiated in the Welcome caps.
- Per-transfer QUIC bi-streams ("PKFs" magic) for lazy fetch of offered content,
with ClipFetchHdr status/size framing (quic::clipstream).
- The §3.5 portable wire-MIME vocabulary (text/plain;utf-8, text/html, text/rtf,
image/png) shared by both ends.
- Client-side clipboard task (client.rs) + C ABI surface bumped to v6 (abi.rs,
regenerated include/punktfunk_core.h).
- Loopback transport tests (quic::tests).
No OS clipboard integration yet — that is the host backends (Phase 1/3) and the
macOS client (Phase 1).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler
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