Merge nvrsion promote (trunk → dev); land iOS host_exec formatting

Concludes an in-progress merge the auto-lander could not finish with
partial commits. Lands the iOS host_exec command breakdown and the
RemoteStore preview-data missing-return fix.

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

NucleicRemote/NucleicRemote/Views/Transcript/ToolGroupRow.swift

@@ -32,7 +32,7 @@ struct ToolCallCard: View {
         HStack(spacing: 8) {
             Image(systemName: ToolGlyph.icon(group.name))
                 .font(.caption).foregroundStyle(group.isError ? Palette.danger : .secondary)
-            Text(group.name).font(.caption.weight(.semibold))
+            Text(group.displayName).font(.caption.weight(.semibold))
             Text(group.input.compactSummary)
                 .font(.caption.monospaced()).foregroundStyle(.secondary).lineLimit(1)
             Spacer(minLength: 4)
@@ -105,7 +105,7 @@ struct ToolBlockCard: View {
                     Image(systemName: ToolGlyph.icon(group.name))
                         .font(.caption).foregroundStyle(group.isError ? Palette.danger : .secondary)
                         .frame(width: 16)
-                    Text(group.name).font(.caption.weight(.semibold))
+                    Text(group.displayName).font(.caption.weight(.semibold))
                     Text(group.input.compactSummary)
                         .font(.caption.monospaced()).foregroundStyle(.secondary).lineLimit(1)
                     Spacer(minLength: 4)
@@ -447,6 +447,7 @@ enum ToolGlyph {
         case "Task", "Agent": return "person.2"
         case "TodoWrite": return "checklist"
         case "AskUserQuestion": return "questionmark.bubble"
+        case HostCommandSummary.hostExecToolName: return "desktopcomputer"
         default: return "wrench.and.screwdriver"
         }
     }