iOS remote: transcript fidelity + mid-session controls & model catalog

Bring NucleicRemote closer to desktop parity in two areas (the core
sync loop was already at parity — shared protocol, control scope).

Transcript fidelity (iOS): a client-side TranscriptProjection coalesces
streaming text by messageID and folds each tool call's lifecycle
(start/deltas/complete/result/fileChange) into one expandable card —
fixing the duplicate started+completed rows. Adds Markdown bubbles, the
gold Orchestra card for Task/Agent spawns, and the previously-dropped
usage/cost, rate-limit, file-change, turn-boundary and session-started
rows, plus a context-window % header badge.

Mid-session controls + model catalog (protocol/host/iOS): project the
host ModelCatalog over the wire as WireModelCatalog (in Welcome); add 5
control-scope setters (setSessionModel/Effort/Auto/AutoShip/ShipBranch)
backed by the existing AppStore.mutateSession + SessionController hooks;
enrich WireSessionSummary with model/effort/auto/autoShip/shipBranch/
contextInputTokens (all forward-compatible). The composer gains a model
picker and a catalog-driven effort menu (per-backend caps: Codex→xhigh,
Grok→auto), and the session header gains a model/effort/auto/autoship
control bar.

Tests: CBOR round-trips for the new messages, Welcome.modelCatalog, the
new summary fields, forward-compat decode of old bytes, and the setters
reaching the host. Verified in the Simulator (NUCLEIC_DEMO=1).

Co-Authored-By: Claude Opus 4.8 <[email protected]>

NucleicRemote/NucleicRemote/Views/SettingsView.swift

@@ -3,6 +3,8 @@ import SwiftUI
 struct SettingsView: View {
     @EnvironmentObject var store: RemoteStore
     @State private var showScanner = false
+    @AppStorage("nucleic.showRawEvents") private var showRaw = false
+    @AppStorage("nucleic.showLockEvents") private var showLockEvents = true
 
     var body: some View {
         NavigationStack {
@@ -22,6 +24,15 @@ struct SettingsView: View {
                         .font(.footnote.monospaced())
                 }
 
+                Section {
+                    Toggle("Show lock events", isOn: $showLockEvents)
+                    Toggle("Show raw events", isOn: $showRaw)
+                } header: {
+                    Text("Transcript")
+                } footer: {
+                    Text("Raw events are unrecognized backend output, shown for debugging.")
+                }
+
                 Section {
                     Button {
                         showScanner = true