abkslmandClaude Opus 4.8
630380085e
First step of Phase 3 (iOS multi-host), per docs/MESH_TRANSFER.md. Converts IdentityStore from a single `nucleic.pairedHost` slot to a `nucleic.pairedHosts` registry (ordered [PairedHost], keyed by fingerprint = hostID), with a one-time migration of the legacy single value on first read (then the old key is removed) so an upgrade keeps its Mac. New registry API — pairedHosts(), pairedHost(id:), upsertPairedHost(_:), removePairedHost(id:) — for the coming RemoteStore multiplexer. A single-host bridge keeps every current caller unchanged and behavior identical: loadPairedHost() returns the active (most-recently-paired) host, savePairedHost upserts + makes active, clearPairedHost removes the active. RemoteStore is untouched and still holds one connection. Settings gains a "Paired Macs" list (the visible artifact): each registered Mac with its fingerprint, an "Active" marker, and a per-host remove (removing the active one unpairs the live connection; removing another just forgets it) — this also gives a removal path now that pairing a new Mac keeps the old one in the registry instead of overwriting it. Verified with an iOS Simulator build (BUILD SUCCEEDED). Remaining Phase 3: the RemoteStore [HostID: HostConnection] multiplexer (simultaneous connections, (hostID, sessionID) keying), host-qualified notifications/Live Activity, host switcher UI, demo N-hosts, and the two-Mac tailnet spike. Co-Authored-By: Claude Opus 4.8 <[email protected]>