M4: NucleicRemote iPhone app — SwiftUI client over the shared protocol

A real iOS Xcode app (ios/NucleicRemote) linking the NucleicProtocol SwiftPM
library as a local package. Builds for the iOS 27 simulator and launches to the
pairing screen.

- Transport: NWFrameChannel (NWConnection) + LANDiscovery (Bonjour _nucleic._tcp).
- Engine: drives NucleicProtocol.SyncClient (Noise XXpsk0 pair / IK reconnect,
  hello/welcome, HostMsg→Event stream).
- State: RemoteStore (ObservableObject) — the single on-device projection of host
  state; IdentityStore persists the device identity (Keychain) + pinned host.
- UI (UX_IOS): attention-first SessionsView, SessionDetailView (transcript/diff +
  status-driven action area / composer), ApprovalCardView with Face ID gate on
  high-risk approvals + allow-always menu, PairingScannerView (AVFoundation QR),
  SettingsView, connection chip. Same status glyphs/semantics as the Mac.

Add-iPhone QR display + server start live on the macOS side (follow-up); push /
Live Activity are M5 (needs the relay). gitignore keeps this .xcodeproj despite
the blanket *.xcodeproj rule.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

NucleicRemote/NucleicRemote.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -0,0 +1,15 @@
+{
+  "originHash" : "8150c8a8a78c15ae48059529aee5044ae234d717fb91b94b39df933cf2fafaa6",
+  "pins" : [
+    {
+      "identity" : "grdb.swift",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/groue/GRDB.swift.git",
+      "state" : {
+        "revision" : "9ed8c8457e00ff9c7aedb3bf213f20a2cfdf509e",
+        "version" : "7.11.0"
+      }
+    }
+  ],
+  "version" : 3
+}