Merge nucleic/keen-willow-wren-ydll into dev

NucleicRemote/NucleicRemote/Models/HostConnection.swift

@@ -797,6 +797,13 @@ final class HostConnection {
             // Collapsed Bash summary lines the owner pushes to peer *Macs* (mesh session sync).
             // The phone renders its own deterministic command summaries, so it ignores these.
             break
+        case .carbonHeads, .carbonHeadAdvanced, .carbonManifestData, .carbonManifestUnavailable,
+            .carbonShardData, .carbonShardUnavailable:
+            // Carbon shard replication (docs/CARBON_SHARDING.md §8.6, D13): phones hold no
+            // Carbon store, no key custody, and never mirror — every case is inert here. The
+            // phone never sends the fetch verbs (it doesn't advertise `canMirrorCarbon`), so
+            // these arrive only if a future host misroutes; ignoring them is the contract.
+            break
         case .transcriptReverted(let reverted):
             // The owner reverted/undid this chat — the transcript was truncated to `throughSeq`.
             // Tell RemoteStore first (it records the applied revert epoch so the summary-level

NucleicRemote/NucleicRemote/Models/RemoteStore.swift

@@ -2834,6 +2834,11 @@ final class RemoteStore: ObservableObject {
         // Session-owning intents → the Mac that has this session.
         case .subscribe(let s):
             connection(owningSession: s.sessionID)?.send(msg)
+        case .fetchCarbonHeads, .fetchCarbonManifests, .fetchCarbonShards, .carbonShardAck:
+            // Carbon shard replication (docs/CARBON_SHARDING.md §8.6, D13): phones never
+            // mirror — no Carbon store, no key custody — so these verbs are never issued from
+            // iOS. Inert by contract.
+            break
         case .unsubscribe(let id), .interrupt(let id), .deleteSession(let id), .discard(let id),
              .integrate(let id, _), .renameSession(let id, _), .setFavorite(let id, _),
              .setArchived(let id, _), .setSessionModel(let id, _), .setSessionEffort(let id, _),
@@ -3035,6 +3040,8 @@ final class RemoteStore: ObservableObject {
         switch msg {
         case .sendInput(let id, let input):
             demoRun(id, userText: input.plainText ?? "")
+        case .fetchCarbonHeads, .fetchCarbonManifests, .fetchCarbonShards, .carbonShardAck:
+            break  // Carbon replication: never issued from iOS (D13); inert in demo too.
         case .startChat(let req):
             demoStartChat(req)
         case .approvalRespond(let id, let decision):