Initial scaffold — NASBackup iOS app

Full project scaffold: XcodeGen project.yml, Core models/protocols/errors,
SMBService (kishikawakatsumi/SMBClient), SFTPService (Citadel 0.9.2),
PhotoLibraryService, LANMonitor, BackupEngine, BackgroundTaskManager,
all feature UIs (Login, Connect, Browse, Backup, History, Settings),
Shared components and theme. Builds clean with zero errors.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Shared/Components/ToggleRow.swift

@@ -0,0 +1,35 @@
+import SwiftUI
+
+struct ToggleRow: View {
+    let icon: String
+    let title: String
+    var subtitle: String? = nil
+    @Binding var isOn: Bool
+
+    var body: some View {
+        HStack(spacing: 12) {
+            Image(systemName: icon)
+                .font(.system(size: 16, weight: .medium))
+                .foregroundColor(AppTheme.blue)
+                .frame(width: 24)
+
+            VStack(alignment: .leading, spacing: 2) {
+                Text(title)
+                    .font(AppTheme.bodyFont)
+                    .foregroundColor(AppTheme.textPrimary)
+                if let subtitle {
+                    Text(subtitle)
+                        .font(AppTheme.captionFont)
+                        .foregroundColor(AppTheme.textSecondary)
+                }
+            }
+
+            Spacer()
+
+            Toggle("", isOn: $isOn)
+                .labelsHidden()
+                .tint(AppTheme.blue)
+        }
+        .padding(.vertical, 4)
+    }
+}