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/FolderRow.swift

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+import SwiftUI
+
+struct FolderRow: View {
+    let item: NASItem
+    let isSelected: Bool
+    let onTap: () -> Void
+
+    var body: some View {
+        Button(action: onTap) {
+            HStack(spacing: 12) {
+                Image(systemName: item.isDirectory ? "folder.fill" : "doc.fill")
+                    .font(.system(size: 18))
+                    .foregroundColor(isSelected ? .white : (item.isDirectory ? AppTheme.blue : AppTheme.textSecondary))
+
+                Text(item.name)
+                    .font(AppTheme.bodyFont)
+                    .fontWeight(isSelected ? .semibold : .regular)
+                    .foregroundColor(isSelected ? .white : AppTheme.textPrimary)
+
+                Spacer()
+
+                if isSelected {
+                    Image(systemName: "checkmark")
+                        .font(.system(size: 13, weight: .bold))
+                        .foregroundColor(.white)
+                } else if item.isDirectory {
+                    Image(systemName: "chevron.right")
+                        .font(.system(size: 13, weight: .medium))
+                        .foregroundColor(AppTheme.textTertiary)
+                }
+            }
+            .padding(.horizontal, 16)
+            .padding(.vertical, 12)
+            .background(isSelected ? AppTheme.blue : Color.clear)
+        }
+        .buttonStyle(.plain)
+    }
+}

Shared/Components/ProgressRing.swift

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+import SwiftUI
+
+struct ProgressRing: View {
+    let progress: Double
+    var lineWidth: CGFloat = 14
+    var size: CGFloat = 200
+    var color: Color = AppTheme.blue
+    var backgroundColor: Color = Color(hex: "#E5E7EB")
+
+    var body: some View {
+        ZStack {
+            Circle()
+                .stroke(backgroundColor, lineWidth: lineWidth)
+
+            Circle()
+                .trim(from: 0, to: CGFloat(min(progress, 1.0)))
+                .stroke(
+                    color,
+                    style: StrokeStyle(lineWidth: lineWidth, lineCap: .round)
+                )
+                .rotationEffect(.degrees(-90))
+                .animation(.easeInOut(duration: 0.4), value: progress)
+        }
+        .frame(width: size, height: size)
+    }
+}

Shared/Components/ToggleRow.swift

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+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)
+    }
+}