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/Info.plist

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSCameraUsageDescription</key>
+	<string>Scan the pairing QR code shown on your Mac.</string>
+	<key>NSLocalNetworkUsageDescription</key>
+	<string>Connect to your Mac running Nucleic on the local network.</string>
+	<key>NSBonjourServices</key>
+	<array>
+		<string>_nucleic._tcp</string>
+	</array>
+</dict>
+</plist>