# Phase 6: Polish & Release

**Goal:** Production-ready application with comprehensive error handling, accessibility, performance optimization, and full test coverage

**Prerequisites:** Phase 5 complete (Plant collection working, Core Data persistence functional, image caching implemented, search/filter operational)

---

## Tasks

### 6.1 Build Settings View
- [ ] Create `Presentation/Scenes/Settings/SettingsView.swift`:
  ```swift
  struct SettingsView: View {
      @State private var viewModel: SettingsViewModel
      @State private var showingClearCacheAlert = false
      @State private var showingDeleteDataAlert = false

      var body: some View {
          NavigationStack {
              List {
                  identificationSection
                  cacheSection
                  apiStatusSection
                  aboutSection
                  dangerZoneSection
              }
              .navigationTitle("Settings")
          }
      }

      private var identificationSection: some View {
          Section("Identification") {
              Toggle("Offline Mode", isOn: $viewModel.offlineModeEnabled)

              Picker("Preferred Method", selection: $viewModel.preferredIdentificationMethod) {
                  Text("Hybrid (Recommended)").tag(IdentificationMethod.hybrid)
                  Text("On-Device Only").tag(IdentificationMethod.onDevice)
                  Text("API Only").tag(IdentificationMethod.apiOnly)
              }

              HStack {
                  Text("Minimum Confidence")
                  Spacer()
                  Text("\(Int(viewModel.minimumConfidence * 100))%")
                      .foregroundStyle(.secondary)
              }
              Slider(value: $viewModel.minimumConfidence, in: 0.5...0.95, step: 0.05)
          }
      }

      private var cacheSection: some View {
          Section("Storage") {
              HStack {
                  Text("Image Cache")
                  Spacer()
                  Text(viewModel.imageCacheSize)
                      .foregroundStyle(.secondary)
              }

              HStack {
                  Text("Identification Cache")
                  Spacer()
                  Text(viewModel.identificationCacheSize)
                      .foregroundStyle(.secondary)
              }

              Button("Clear Image Cache") {
                  showingClearCacheAlert = true
              }
              .foregroundStyle(.red)
          }
      }

      private var apiStatusSection: some View {
          Section("API Status") {
              APIStatusRow(
                  name: "PlantNet API",
                  status: viewModel.plantNetStatus,
                  quota: viewModel.plantNetQuota
              )

              APIStatusRow(
                  name: "Trefle API",
                  status: viewModel.trefleStatus,
                  quota: nil
              )

              HStack {
                  Text("Network Status")
                  Spacer()
                  NetworkStatusBadge(isConnected: viewModel.isNetworkAvailable)
              }
          }
      }

      private var aboutSection: some View {
          Section("About") {
              HStack {
                  Text("Version")
                  Spacer()
                  Text(viewModel.appVersion)
                      .foregroundStyle(.secondary)
              }

              HStack {
                  Text("Build")
                  Spacer()
                  Text(viewModel.buildNumber)
                      .foregroundStyle(.secondary)
              }

              HStack {
                  Text("ML Model")
                  Spacer()
                  Text("PlantNet-300K")
                      .foregroundStyle(.secondary)
              }

              Link("Privacy Policy", destination: URL(string: "https://example.com/privacy")!)
              Link("Terms of Service", destination: URL(string: "https://example.com/terms")!)
              Link("Open Source Licenses", destination: URL(string: "https://example.com/licenses")!)
          }
      }

      private var dangerZoneSection: some View {
          Section("Danger Zone") {
              Button("Delete All Plant Data", role: .destructive) {
                  showingDeleteDataAlert = true
              }
          }
      }
  }
  ```
- [ ] Create `SettingsViewModel`:
  ```swift
  @Observable
  final class SettingsViewModel {
      // Preferences
      var offlineModeEnabled: Bool {
          didSet { UserDefaults.standard.set(offlineModeEnabled, forKey: "offlineModeEnabled") }
      }
      var preferredIdentificationMethod: IdentificationMethod {
          didSet { UserDefaults.standard.set(preferredIdentificationMethod.rawValue, forKey: "identificationMethod") }
      }
      var minimumConfidence: Double {
          didSet { UserDefaults.standard.set(minimumConfidence, forKey: "minimumConfidence") }
      }

      // Cache info
      private(set) var imageCacheSize: String = "Calculating..."
      private(set) var identificationCacheSize: String = "Calculating..."

      // API status
      private(set) var plantNetStatus: APIStatus = .unknown
      private(set) var plantNetQuota: APIQuota?
      private(set) var trefleStatus: APIStatus = .unknown
      private(set) var isNetworkAvailable: Bool = true

      // App info
      let appVersion: String
      let buildNumber: String

      private let imageCache: ImageCacheProtocol
      private let identificationCache: IdentificationCacheProtocol
      private let plantNetService: PlantNetAPIServiceProtocol
      private let trefleService: TrefleAPIServiceProtocol
      private let networkMonitor: NetworkMonitorProtocol
      private let plantRepository: PlantCollectionRepositoryProtocol

      init(/* dependencies */) {
          // Load from UserDefaults
          self.offlineModeEnabled = UserDefaults.standard.bool(forKey: "offlineModeEnabled")
          self.preferredIdentificationMethod = IdentificationMethod(
              rawValue: UserDefaults.standard.string(forKey: "identificationMethod") ?? ""
          ) ?? .hybrid
          self.minimumConfidence = UserDefaults.standard.double(forKey: "minimumConfidence")
          if self.minimumConfidence == 0 { self.minimumConfidence = 0.7 }

          // App info
          self.appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "1.0"
          self.buildNumber = Bundle.main.infoDictionary?["CFBundleVersion"] as? String ?? "1"

          // Store dependencies
          self.imageCache = imageCache
          // ... other dependencies
      }

      func loadCacheInfo() async {
          let imageSize = await imageCache.getCacheSize()
          imageCacheSize = ByteCountFormatter.string(fromByteCount: imageSize, countStyle: .file)

          let idSize = await identificationCache.getCacheSize()
          identificationCacheSize = ByteCountFormatter.string(fromByteCount: idSize, countStyle: .file)
      }

      func checkAPIStatus() async {
          // Check PlantNet
          do {
              let status = try await plantNetService.checkStatus()
              plantNetStatus = .available
              plantNetQuota = status.quota
          } catch {
              plantNetStatus = .unavailable(error.localizedDescription)
          }

          // Check Trefle
          do {
              try await trefleService.checkStatus()
              trefleStatus = .available
          } catch {
              trefleStatus = .unavailable(error.localizedDescription)
          }
      }

      func clearImageCache() async throws {
          await imageCache.clearAllCache()
          await loadCacheInfo()
      }

      func deleteAllData() async throws {
          try await plantRepository.deleteAllPlants()
          await imageCache.clearAllCache()
          await identificationCache.clearAll()
      }
  }

  enum IdentificationMethod: String, CaseIterable {
      case hybrid, onDevice, apiOnly
  }

  enum APIStatus: Equatable {
      case unknown
      case available
      case unavailable(String)
  }

  struct APIQuota {
      let used: Int
      let limit: Int
      let resetsAt: Date
  }
  ```
- [ ] Create `APIStatusRow` component:
  ```swift
  struct APIStatusRow: View {
      let name: String
      let status: APIStatus
      let quota: APIQuota?

      var body: some View {
          VStack(alignment: .leading, spacing: 4) {
              HStack {
                  Text(name)
                  Spacer()
                  StatusBadge(status: status)
              }

              if let quota {
                  ProgressView(value: Double(quota.used), total: Double(quota.limit))
                      .tint(quotaColor(quota))
                  Text("\(quota.used)/\(quota.limit) requests today")
                      .font(.caption)
                      .foregroundStyle(.secondary)
              }
          }
      }

      private func quotaColor(_ quota: APIQuota) -> Color {
          let percentage = Double(quota.used) / Double(quota.limit)
          if percentage > 0.9 { return .red }
          if percentage > 0.7 { return .orange }
          return .green
      }
  }
  ```
- [ ] Create `NetworkStatusBadge` component
- [ ] Implement network reachability monitoring with `NWPathMonitor`
- [ ] Add haptic feedback for toggle changes
- [ ] Register SettingsViewModel in DIContainer
- [ ] Write unit tests for settings persistence

**Acceptance Criteria:** Settings view displays all options, changes persist, cache info accurate, API status reflects reality

---

### 6.2 Add Comprehensive Error Handling
- [ ] Create `Presentation/Common/Components/ErrorView.swift`:
  ```swift
  struct ErrorView: View {
      let error: AppError
      let retryAction: (() async -> Void)?
      let dismissAction: (() -> Void)?

      @State private var isRetrying = false

      var body: some View {
          VStack(spacing: 24) {
              errorIcon

              VStack(spacing: 8) {
                  Text(error.title)
                      .font(.title2)
                      .fontWeight(.semibold)

                  Text(error.message)
                      .font(.body)
                      .foregroundStyle(.secondary)
                      .multilineTextAlignment(.center)
              }

              if let suggestion = error.recoverySuggestion {
                  Text(suggestion)
                      .font(.callout)
                      .foregroundStyle(.tertiary)
                      .multilineTextAlignment(.center)
              }

              actionButtons
          }
          .padding(32)
          .frame(maxWidth: .infinity, maxHeight: .infinity)
          .background(Color(.systemBackground))
      }

      @ViewBuilder
      private var errorIcon: some View {
          ZStack {
              Circle()
                  .fill(error.iconBackgroundColor.opacity(0.1))
                  .frame(width: 80, height: 80)

              Image(systemName: error.iconName)
                  .font(.system(size: 36))
                  .foregroundStyle(error.iconBackgroundColor)
          }
      }

      @ViewBuilder
      private var actionButtons: some View {
          VStack(spacing: 12) {
              if let retry = retryAction {
                  Button {
                      Task {
                          isRetrying = true
                          await retry()
                          isRetrying = false
                      }
                  } label: {
                      if isRetrying {
                          ProgressView()
                              .frame(maxWidth: .infinity)
                      } else {
                          Text(error.retryButtonTitle)
                              .frame(maxWidth: .infinity)
                      }
                  }
                  .buttonStyle(.borderedProminent)
                  .disabled(isRetrying)
              }

              if let dismiss = dismissAction {
                  Button("Dismiss", action: dismiss)
                      .buttonStyle(.bordered)
              }
          }
          .padding(.top, 8)
      }
  }
  ```
- [ ] Create unified `AppError` type:
  ```swift
  // Core/Errors/AppError.swift
  enum AppError: Error, LocalizedError, Sendable {
      // Network
      case networkUnavailable
      case networkTimeout
      case serverError(statusCode: Int)
      case invalidResponse

      // Identification
      case cameraAccessDenied
      case photoLibraryAccessDenied
      case identificationFailed(underlying: Error)
      case noPlantDetected
      case lowConfidence(Double)
      case modelNotLoaded

      // API
      case apiKeyMissing(service: String)
      case rateLimitExceeded(resetsAt: Date?)
      case quotaExhausted
      case apiUnavailable(service: String)

      // Persistence
      case saveFailed(underlying: Error)
      case fetchFailed(underlying: Error)
      case deleteFailed(underlying: Error)
      case dataCorrupted

      // Care
      case notificationPermissionDenied
      case scheduleCreationFailed
      case careDataUnavailable

      // General
      case unknown(underlying: Error)

      var title: String {
          switch self {
          case .networkUnavailable: return "No Internet Connection"
          case .networkTimeout: return "Connection Timed Out"
          case .serverError: return "Server Error"
          case .cameraAccessDenied: return "Camera Access Required"
          case .photoLibraryAccessDenied: return "Photo Access Required"
          case .identificationFailed: return "Identification Failed"
          case .noPlantDetected: return "No Plant Detected"
          case .lowConfidence: return "Uncertain Result"
          case .modelNotLoaded: return "Model Not Ready"
          case .rateLimitExceeded: return "Too Many Requests"
          case .quotaExhausted: return "Daily Limit Reached"
          case .apiUnavailable: return "Service Unavailable"
          case .saveFailed: return "Save Failed"
          case .fetchFailed: return "Load Failed"
          case .deleteFailed: return "Delete Failed"
          case .dataCorrupted: return "Data Error"
          case .notificationPermissionDenied: return "Notifications Disabled"
          case .scheduleCreationFailed: return "Schedule Error"
          case .careDataUnavailable: return "Care Info Unavailable"
          default: return "Something Went Wrong"
          }
      }

      var message: String {
          switch self {
          case .networkUnavailable:
              return "Please check your internet connection and try again."
          case .cameraAccessDenied:
              return "Botanica needs camera access to identify plants. Please enable it in Settings."
          case .noPlantDetected:
              return "We couldn't detect a plant in this image. Try taking a clearer photo of the leaves or flowers."
          case .lowConfidence(let confidence):
              return "We're only \(Int(confidence * 100))% confident about this identification. Try a different angle or better lighting."
          case .rateLimitExceeded(let resetsAt):
              if let date = resetsAt {
                  let formatter = RelativeDateTimeFormatter()
                  return "Please try again \(formatter.localizedString(for: date, relativeTo: Date()))."
              }
              return "Please wait a moment before trying again."
          case .quotaExhausted:
              return "You've reached the daily identification limit. Try again tomorrow or use offline mode."
          default:
              return "An unexpected error occurred. Please try again."
          }
      }

      var recoverySuggestion: String? {
          switch self {
          case .networkUnavailable:
              return "You can still use offline identification while disconnected."
          case .cameraAccessDenied, .photoLibraryAccessDenied:
              return "Go to Settings > Botanica > Privacy"
          case .noPlantDetected:
              return "Make sure the plant fills most of the frame."
          case .quotaExhausted:
              return "Offline identification is still available."
          default:
              return nil
          }
      }

      var iconName: String {
          switch self {
          case .networkUnavailable, .networkTimeout: return "wifi.slash"
          case .cameraAccessDenied: return "camera.fill"
          case .photoLibraryAccessDenied: return "photo.fill"
          case .noPlantDetected, .lowConfidence: return "leaf.fill"
          case .rateLimitExceeded, .quotaExhausted: return "clock.fill"
          case .saveFailed, .fetchFailed, .deleteFailed, .dataCorrupted: return "externaldrive.fill"
          case .notificationPermissionDenied: return "bell.slash.fill"
          default: return "exclamationmark.triangle.fill"
          }
      }

      var iconBackgroundColor: Color {
          switch self {
          case .networkUnavailable, .networkTimeout: return .orange
          case .cameraAccessDenied, .photoLibraryAccessDenied: return .blue
          case .noPlantDetected, .lowConfidence: return .green
          case .rateLimitExceeded, .quotaExhausted: return .purple
          case .saveFailed, .fetchFailed, .deleteFailed, .dataCorrupted: return .red
          default: return .red
          }
      }

      var retryButtonTitle: String {
          switch self {
          case .cameraAccessDenied, .photoLibraryAccessDenied, .notificationPermissionDenied:
              return "Open Settings"
          case .networkUnavailable:
              return "Try Again"
          default:
              return "Retry"
          }
      }

      var isRetryable: Bool {
          switch self {
          case .networkUnavailable, .networkTimeout, .serverError, .identificationFailed,
               .saveFailed, .fetchFailed, .apiUnavailable:
              return true
          default:
              return false
          }
      }
  }
  ```
- [ ] Create inline error banner for non-blocking errors:
  ```swift
  struct ErrorBanner: View {
      let error: AppError
      let dismiss: () -> Void

      var body: some View {
          HStack(spacing: 12) {
              Image(systemName: error.iconName)
                  .foregroundStyle(error.iconBackgroundColor)

              VStack(alignment: .leading, spacing: 2) {
                  Text(error.title)
                      .font(.subheadline)
                      .fontWeight(.medium)
                  Text(error.message)
                      .font(.caption)
                      .foregroundStyle(.secondary)
                      .lineLimit(2)
              }

              Spacer()

              Button(action: dismiss) {
                  Image(systemName: "xmark")
                      .font(.caption)
                      .foregroundStyle(.secondary)
              }
          }
          .padding()
          .background(.ultraThinMaterial)
          .clipShape(RoundedRectangle(cornerRadius: 12))
          .shadow(radius: 4)
          .padding(.horizontal)
      }
  }
  ```
- [ ] Create error handling view modifier:
  ```swift
  struct ErrorHandlingModifier: ViewModifier {
      @Binding var error: AppError?
      let retryAction: (() async -> Void)?

      func body(content: Content) -> some View {
          content
              .alert(
                  error?.title ?? "Error",
                  isPresented: Binding(
                      get: { error != nil },
                      set: { if !$0 { error = nil } }
                  ),
                  presenting: error
              ) { error in
                  if error.isRetryable, let retry = retryAction {
                      Button("Retry") {
                          Task { await retry() }
                      }
                  }
                  Button("Dismiss", role: .cancel) {}
              } message: { error in
                  Text(error.message)
              }
      }
  }

  extension View {
      func errorAlert(_ error: Binding<AppError?>, retry: (() async -> Void)? = nil) -> some View {
          modifier(ErrorHandlingModifier(error: error, retryAction: retry))
      }
  }
  ```
- [ ] Add error logging service:
  ```swift
  protocol ErrorLoggingServiceProtocol: Sendable {
      func log(_ error: Error, context: [String: Any]?)
      func logWarning(_ message: String, context: [String: Any]?)
  }

  final class ErrorLoggingService: ErrorLoggingServiceProtocol, Sendable {
      func log(_ error: Error, context: [String: Any]?) {
          #if DEBUG
          print("ERROR: \(error.localizedDescription)")
          if let context {
              print("Context: \(context)")
          }
          #endif

          // In production, send to crash reporting service
      }
  }
  ```
- [ ] Update all ViewModels to use `AppError`
- [ ] Add error recovery actions (open settings, retry, etc.)
- [ ] Write unit tests for error mapping

**Acceptance Criteria:** All errors display user-friendly messages, retry works for retryable errors, error context logged

---

### 6.3 Implement Loading States with Shimmer Effects
- [ ] Create `ShimmerModifier`:
  ```swift
  struct ShimmerModifier: ViewModifier {
      @State private var phase: CGFloat = 0
      let animation: Animation
      let gradient: Gradient

      init(
          animation: Animation = .linear(duration: 1.5).repeatForever(autoreverses: false),
          gradient: Gradient = Gradient(colors: [.clear, .white.opacity(0.5), .clear])
      ) {
          self.animation = animation
          self.gradient = gradient
      }

      func body(content: Content) -> some View {
          content
              .overlay {
                  GeometryReader { geometry in
                      LinearGradient(
                          gradient: gradient,
                          startPoint: .leading,
                          endPoint: .trailing
                      )
                      .frame(width: geometry.size.width * 3)
                      .offset(x: -geometry.size.width + phase * geometry.size.width * 3)
                  }
                  .clipped()
              }
              .onAppear {
                  withAnimation(animation) {
                      phase = 1
                  }
              }
      }
  }

  extension View {
      func shimmer() -> some View {
          modifier(ShimmerModifier())
      }
  }
  ```
- [ ] Create skeleton components:
  ```swift
  struct SkeletonShape: View {
      let width: CGFloat?
      let height: CGFloat

      var body: some View {
          RoundedRectangle(cornerRadius: 8)
              .fill(Color.gray.opacity(0.2))
              .frame(width: width, height: height)
              .shimmer()
      }
  }

  struct PlantCardSkeleton: View {
      var body: some View {
          VStack(alignment: .leading, spacing: 8) {
              SkeletonShape(width: nil, height: 150)
                  .clipShape(RoundedRectangle(cornerRadius: 12))

              SkeletonShape(width: 120, height: 20)
              SkeletonShape(width: 80, height: 14)
          }
          .padding(8)
          .background(.regularMaterial)
          .clipShape(RoundedRectangle(cornerRadius: 16))
      }
  }

  struct CollectionSkeletonView: View {
      private let columns = [
          GridItem(.adaptive(minimum: 150, maximum: 200), spacing: 16)
      ]

      var body: some View {
          ScrollView {
              LazyVGrid(columns: columns, spacing: 16) {
                  ForEach(0..<6, id: \.self) { _ in
                      PlantCardSkeleton()
                  }
              }
              .padding()
          }
      }
  }

  struct IdentificationResultSkeleton: View {
      var body: some View {
          VStack(spacing: 16) {
              SkeletonShape(width: nil, height: 200)
                  .clipShape(RoundedRectangle(cornerRadius: 16))

              VStack(alignment: .leading, spacing: 8) {
                  SkeletonShape(width: 180, height: 24)
                  SkeletonShape(width: 140, height: 16)
                  SkeletonShape(width: nil, height: 12)
                  SkeletonShape(width: nil, height: 12)
              }

              HStack(spacing: 16) {
                  SkeletonShape(width: nil, height: 44)
                  SkeletonShape(width: nil, height: 44)
              }
          }
          .padding()
      }
  }

  struct PlantDetailSkeleton: View {
      var body: some View {
          ScrollView {
              VStack(spacing: 20) {
                  SkeletonShape(width: nil, height: 300)

                  VStack(alignment: .leading, spacing: 12) {
                      SkeletonShape(width: 200, height: 28)
                      SkeletonShape(width: 150, height: 18)

                      Divider()

                      SkeletonShape(width: 100, height: 20)
                      SkeletonShape(width: nil, height: 80)

                      SkeletonShape(width: 100, height: 20)
                      SkeletonShape(width: nil, height: 60)
                  }
                  .padding(.horizontal)
              }
          }
      }
  }

  struct CareScheduleSkeleton: View {
      var body: some View {
          VStack(alignment: .leading, spacing: 16) {
              ForEach(0..<4, id: \.self) { _ in
                  HStack(spacing: 12) {
                      SkeletonShape(width: 44, height: 44)
                          .clipShape(Circle())

                      VStack(alignment: .leading, spacing: 4) {
                          SkeletonShape(width: 120, height: 16)
                          SkeletonShape(width: 80, height: 12)
                      }

                      Spacer()

                      SkeletonShape(width: 60, height: 24)
                  }
                  .padding()
                  .background(.regularMaterial)
                  .clipShape(RoundedRectangle(cornerRadius: 12))
              }
          }
          .padding()
      }
  }
  ```
- [ ] Create loading state view modifier:
  ```swift
  struct LoadingStateModifier<Loading: View>: ViewModifier {
      let isLoading: Bool
      let loadingView: Loading

      func body(content: Content) -> some View {
          if isLoading {
              loadingView
          } else {
              content
          }
      }
  }

  extension View {
      func loading<L: View>(
          _ isLoading: Bool,
          @ViewBuilder placeholder: () -> L
      ) -> some View {
          modifier(LoadingStateModifier(isLoading: isLoading, loadingView: placeholder()))
      }
  }
  ```
- [ ] Add button loading states:
  ```swift
  struct LoadingButton: View {
      let title: String
      let isLoading: Bool
      let action: () -> Void

      var body: some View {
          Button(action: action) {
              ZStack {
                  Text(title)
                      .opacity(isLoading ? 0 : 1)

                  if isLoading {
                      ProgressView()
                          .tint(.white)
                  }
              }
              .frame(maxWidth: .infinity)
          }
          .buttonStyle(.borderedProminent)
          .disabled(isLoading)
      }
  }
  ```
- [ ] Create pull-to-refresh with custom animation
- [ ] Add transition animations between loading and content
- [ ] Implement progressive loading for large collections
- [ ] Write snapshot tests for skeleton views

**Acceptance Criteria:** All loading states have skeleton placeholders, shimmer animation is smooth, transitions are seamless

---

### 6.4 Add Accessibility Support
- [ ] Add accessibility labels to all interactive elements:
  ```swift
  // Example: PlantGridCard with full accessibility
  struct PlantGridCard: View {
      let plant: Plant

      var body: some View {
          VStack(alignment: .leading, spacing: 8) {
              CachedAsyncImage(url: plant.imageURLs.first, plantID: plant.id)
                  .frame(height: 150)
                  .clipShape(RoundedRectangle(cornerRadius: 12))
                  .overlay(alignment: .topTrailing) {
                      if plant.isFavorite {
                          Image(systemName: "heart.fill")
                              .foregroundStyle(.red)
                              .padding(8)
                              .accessibilityHidden(true) // Part of card label
                      }
                  }
                  .accessibilityHidden(true) // Image described in card label

              Text(plant.displayName)
                  .font(.headline)
                  .lineLimit(1)

              Text(plant.scientificName)
                  .font(.caption)
                  .foregroundStyle(.secondary)
                  .lineLimit(1)
                  .italic()
          }
          .padding(8)
          .background(.regularMaterial)
          .clipShape(RoundedRectangle(cornerRadius: 16))
          .accessibilityElement(children: .ignore)
          .accessibilityLabel(accessibilityLabel)
          .accessibilityHint("Double tap to view details")
          .accessibilityAddTraits(.isButton)
      }

      private var accessibilityLabel: String {
          var label = plant.displayName
          if plant.displayName != plant.scientificName {
              label += ", scientific name: \(plant.scientificName)"
          }
          if plant.isFavorite {
              label += ", favorite"
          }
          return label
      }
  }
  ```
- [ ] Support Dynamic Type throughout app:
  ```swift
  // Use semantic fonts everywhere
  Text(plant.displayName)
      .font(.headline) // Will scale with Dynamic Type

  // For custom sizes, use relativeTo:
  Text("Scientific Name")
      .font(.system(.caption, design: .serif))

  // Ensure layouts adapt to larger text
  @ScaledMetric(relativeTo: .body) var iconSize: CGFloat = 24
  ```
- [ ] Add VoiceOver support:
  ```swift
  // Custom accessibility actions
  struct PlantCard: View {
      var body: some View {
          cardContent
              .accessibilityAction(named: "Toggle Favorite") {
                  toggleFavorite()
              }
              .accessibilityAction(named: "Delete") {
                  delete()
              }
              .accessibilityAction(named: "View Care Schedule") {
                  showCareSchedule()
              }
      }
  }

  // Announce changes
  func identificationComplete(_ plant: Plant) {
      UIAccessibility.post(
          notification: .announcement,
          argument: "Identified as \(plant.displayName) with \(Int(plant.confidenceScore ?? 0 * 100)) percent confidence"
      )
  }
  ```
- [ ] Implement accessibility rotor for quick navigation:
  ```swift
  struct CollectionView: View {
      var body: some View {
          ScrollView {
              // ... content
          }
          .accessibilityRotor("Favorites") {
              ForEach(plants.filter(\.isFavorite)) { plant in
                  AccessibilityRotorEntry(plant.displayName, id: plant.id)
              }
          }
          .accessibilityRotor("Needs Watering") {
              ForEach(plantsNeedingWater) { plant in
                  AccessibilityRotorEntry(plant.displayName, id: plant.id)
              }
          }
      }
  }
  ```
- [ ] Support Reduce Motion:
  ```swift
  @Environment(\.accessibilityReduceMotion) var reduceMotion

  var body: some View {
      content
          .animation(reduceMotion ? nil : .spring(), value: isExpanded)
  }

  // Or use a wrapper
  extension Animation {
      static func accessibleSpring(_ reduceMotion: Bool) -> Animation? {
          reduceMotion ? nil : .spring()
      }
  }
  ```
- [ ] Support Reduce Transparency:
  ```swift
  @Environment(\.accessibilityReduceTransparency) var reduceTransparency

  var body: some View {
      content
          .background(reduceTransparency ? Color(.systemBackground) : .ultraThinMaterial)
  }
  ```
- [ ] Add accessibility identifiers for UI testing:
  ```swift
  enum AccessibilityID {
      static let cameraButton = "camera_capture_button"
      static let collectionGrid = "plant_collection_grid"
      static let searchField = "collection_search_field"
      static let plantCard = { (id: UUID) in "plant_card_\(id.uuidString)" }
      static let favoriteButton = { (id: UUID) in "favorite_button_\(id.uuidString)" }
      static let deleteButton = { (id: UUID) in "delete_button_\(id.uuidString)" }
  }

  // Usage
  Button("Capture") { capture() }
      .accessibilityIdentifier(AccessibilityID.cameraButton)
  ```
- [ ] Support Bold Text preference
- [ ] Support Increase Contrast preference
- [ ] Test with VoiceOver on device
- [ ] Test with Dynamic Type at all sizes
- [ ] Write accessibility audit checklist
- [ ] Document accessibility features

**Acceptance Criteria:** App fully usable with VoiceOver, all text scales with Dynamic Type, motion respects user preferences

---

### 6.5 Performance Optimization Pass
- [ ] Profile app with Instruments:
  - Time Profiler for CPU bottlenecks
  - Allocations for memory usage
  - Leaks for memory leaks
  - Core Animation for rendering issues
  - Network for API efficiency
- [ ] Optimize image loading:
  ```swift
  // Thumbnail generation for grid
  actor ThumbnailGenerator {
      private var cache: [String: UIImage] = [:]

      func thumbnail(for image: UIImage, size: CGSize) async -> UIImage {
          let key = "\(image.hash)_\(size.width)x\(size.height)"

          if let cached = cache[key] {
              return cached
          }

          let thumbnail = await Task.detached(priority: .userInitiated) {
              let renderer = UIGraphicsImageRenderer(size: size)
              return renderer.image { _ in
                  image.draw(in: CGRect(origin: .zero, size: size))
              }
          }.value

          cache[key] = thumbnail
          return thumbnail
      }
  }

  // Downsampling for large images
  func downsample(imageAt url: URL, to pointSize: CGSize, scale: CGFloat) -> UIImage? {
      let imageSourceOptions = [kCGImageSourceShouldCache: false] as CFDictionary
      guard let imageSource = CGImageSourceCreateWithURL(url as CFURL, imageSourceOptions) else {
          return nil
      }

      let maxDimensionInPixels = max(pointSize.width, pointSize.height) * scale
      let downsampleOptions = [
          kCGImageSourceCreateThumbnailFromImageAlways: true,
          kCGImageSourceShouldCacheImmediately: true,
          kCGImageSourceCreateThumbnailWithTransform: true,
          kCGImageSourceThumbnailMaxPixelSize: maxDimensionInPixels
      ] as CFDictionary

      guard let downsampledImage = CGImageSourceCreateThumbnailAtIndex(imageSource, 0, downsampleOptions) else {
          return nil
      }

      return UIImage(cgImage: downsampledImage)
  }
  ```
- [ ] Optimize Core ML inference:
  ```swift
  // Batch predictions when possible
  // Use GPU for inference
  let config = MLModelConfiguration()
  config.computeUnits = .all // Use Neural Engine when available

  // Warm up model on launch
  func warmUpModel() {
      Task.detached(priority: .background) {
          _ = try? await classificationService.predict(UIImage())
      }
  }
  ```
- [ ] Optimize Core Data queries:
  ```swift
  // Use fetch limits
  let request = PlantMO.fetchRequest()
  request.fetchLimit = 20
  request.fetchBatchSize = 20

  // Only fetch needed properties
  request.propertiesToFetch = ["id", "scientificName", "commonNames", "imageURLs"]

  // Use NSFetchedResultsController for live updates
  lazy var fetchedResultsController: NSFetchedResultsController<PlantMO> = {
      let request = PlantMO.fetchRequest()
      request.sortDescriptors = [NSSortDescriptor(keyPath: \PlantMO.dateAdded, ascending: false)]
      request.fetchBatchSize = 20

      return NSFetchedResultsController(
          fetchRequest: request,
          managedObjectContext: viewContext,
          sectionNameKeyPath: nil,
          cacheName: "PlantCollection"
      )
  }()
  ```
- [ ] Implement view recycling for large collections:
  ```swift
  // LazyVGrid already handles this, but ensure no expensive operations in body
  struct OptimizedPlantGrid: View {
      let plants: [Plant]

      var body: some View {
          ScrollView {
              LazyVGrid(columns: columns, spacing: 16) {
                  ForEach(plants) { plant in
                      PlantGridCard(plant: plant)
                          .id(plant.id) // Stable identity for recycling
                  }
              }
          }
      }
  }
  ```
- [ ] Reduce app launch time:
  ```swift
  // Defer non-critical initialization
  @main
  struct BotanicaApp: App {
      init() {
          // Register value transformers synchronously (required)
          ValueTransformers.registerAll()
      }

      var body: some Scene {
          WindowGroup {
              ContentView()
                  .task {
                      // Defer these to after first frame
                      await DeferredInitialization.perform()
                  }
          }
      }
  }

  enum DeferredInitialization {
      static func perform() async {
          // Warm up ML model
          await MLModelWarmup.warmUp()

          // Pre-fetch common data
          await DataPrefetcher.prefetch()

          // Initialize analytics
          Analytics.initialize()
      }
  }
  ```
- [ ] Optimize network requests:
  ```swift
  // Implement request deduplication
  actor RequestDeduplicator {
      private var inFlightRequests: [String: Task<Data, Error>] = [:]

      func deduplicated<T>(
          key: String,
          request: @escaping () async throws -> T
      ) async throws -> T {
          if let existing = inFlightRequests[key] {
              return try await existing.value as! T
          }

          let task = Task {
              defer { inFlightRequests[key] = nil }
              return try await request()
          }

          inFlightRequests[key] = task as! Task<Data, Error>
          return try await task.value
      }
  }
  ```
- [ ] Add performance monitoring:
  ```swift
  struct PerformanceMonitor {
      static func measure<T>(_ label: String, _ block: () async throws -> T) async rethrows -> T {
          let start = CFAbsoluteTimeGetCurrent()
          defer {
              let duration = CFAbsoluteTimeGetCurrent() - start
              #if DEBUG
              print("⏱ \(label): \(String(format: "%.3f", duration * 1000))ms")
              #endif
          }
          return try await block()
      }
  }
  ```
- [ ] Document performance benchmarks
- [ ] Create performance regression tests

**Acceptance Criteria:** App launch < 2 seconds, ML inference < 500ms, smooth 60fps scrolling, memory < 150MB typical usage

---

### 6.6 Write Unit Tests for Use Cases and Services
- [ ] Set up testing infrastructure:
  ```swift
  // Tests/Mocks/MockPlantCollectionRepository.swift
  final class MockPlantCollectionRepository: PlantCollectionRepositoryProtocol {
      var plants: [Plant] = []
      var addPlantCalled = false
      var deletePlantCalled = false
      var lastDeletedID: UUID?
      var shouldThrowError = false
      var errorToThrow: Error?

      func addPlant(_ plant: Plant) async throws {
          if shouldThrowError { throw errorToThrow ?? TestError.mock }
          addPlantCalled = true
          plants.append(plant)
      }

      func deletePlant(id: UUID) async throws {
          if shouldThrowError { throw errorToThrow ?? TestError.mock }
          deletePlantCalled = true
          lastDeletedID = id
          plants.removeAll { $0.id == id }
      }

      // ... implement all protocol methods
  }
  ```
- [ ] Test identification use cases:
  ```swift
  final class IdentifyPlantOnDeviceUseCaseTests: XCTestCase {
      var sut: IdentifyPlantOnDeviceUseCase!
      var mockClassificationService: MockPlantClassificationService!
      var mockLabelService: MockPlantLabelService!

      override func setUp() {
          super.setUp()
          mockClassificationService = MockPlantClassificationService()
          mockLabelService = MockPlantLabelService()
          sut = IdentifyPlantOnDeviceUseCase(
              classificationService: mockClassificationService,
              labelService: mockLabelService
          )
      }

      func testIdentifyReturnsTopResults() async throws {
          // Given
          let testImage = UIImage.testPlantImage
          mockClassificationService.stubbedResults = [
              ClassificationResult(classIndex: 0, confidence: 0.85),
              ClassificationResult(classIndex: 1, confidence: 0.10),
          ]
          mockLabelService.stubbedLabels = ["Monstera deliciosa", "Philodendron"]

          // When
          let results = try await sut.execute(image: testImage)

          // Then
          XCTAssertEqual(results.count, 2)
          XCTAssertEqual(results[0].scientificName, "Monstera deliciosa")
          XCTAssertEqual(results[0].confidence, 0.85, accuracy: 0.001)
      }

      func testIdentifyThrowsWhenNoResults() async {
          // Given
          mockClassificationService.stubbedResults = []

          // When/Then
          await XCTAssertThrowsError(
              try await sut.execute(image: UIImage.testPlantImage)
          ) { error in
              XCTAssertEqual(error as? AppError, .noPlantDetected)
          }
      }

      func testIdentifyFiltersLowConfidenceResults() async throws {
          // Given
          mockClassificationService.stubbedResults = [
              ClassificationResult(classIndex: 0, confidence: 0.02),
          ]

          // When
          let results = try await sut.execute(image: UIImage.testPlantImage, minimumConfidence: 0.05)

          // Then
          XCTAssertTrue(results.isEmpty)
      }
  }
  ```
- [ ] Test collection use cases:
  ```swift
  final class SavePlantUseCaseTests: XCTestCase {
      var sut: SavePlantUseCase!
      var mockRepository: MockPlantCollectionRepository!
      var mockCareScheduleUseCase: MockCreateCareScheduleUseCase!
      var mockNotificationService: MockNotificationService!
      var mockImageStorage: MockImageStorage!

      func testSavePlantAddsToRepository() async throws {
          // Given
          let plant = Plant.mock()

          // When
          let saved = try await sut.execute(plant: plant, capturedImage: nil, careInfo: nil, preferences: nil)

          // Then
          XCTAssertTrue(mockRepository.addPlantCalled)
          XCTAssertNotNil(saved.dateAdded)
      }

      func testSavePlantWithCareInfoCreatesSchedule() async throws {
          // Given
          let plant = Plant.mock()
          let careInfo = PlantCareInfo.mock()
          mockCareScheduleUseCase.stubbedSchedule = PlantCareSchedule.mock()

          // When
          _ = try await sut.execute(plant: plant, capturedImage: nil, careInfo: careInfo, preferences: nil)

          // Then
          XCTAssertTrue(mockCareScheduleUseCase.executeCalled)
          XCTAssertTrue(mockNotificationService.scheduleReminderCalled)
      }

      func testSavePlantWithImageStoresLocally() async throws {
          // Given
          let plant = Plant.mock()
          let image = UIImage.testPlantImage
          mockImageStorage.stubbedPath = "/local/path/image.jpg"

          // When
          let saved = try await sut.execute(plant: plant, capturedImage: image, careInfo: nil, preferences: nil)

          // Then
          XCTAssertTrue(mockImageStorage.saveCalled)
          XCTAssertEqual(saved.localImagePaths.first, "/local/path/image.jpg")
      }
  }
  ```
- [ ] Test API services:
  ```swift
  final class PlantNetAPIServiceTests: XCTestCase {
      var sut: PlantNetAPIService!
      var mockNetworkService: MockNetworkService!

      func testIdentifyReturnsSpecies() async throws {
          // Given
          let responseData = PlantNetIdentifyResponseDTO.mockJSON.data(using: .utf8)!
          mockNetworkService.stubbedResponse = (responseData, HTTPURLResponse.ok)

          // When
          let response = try await sut.identify(image: UIImage.testPlantImage)

          // Then
          XCTAssertFalse(response.results.isEmpty)
          XCTAssertEqual(response.results[0].species.scientificName, "Monstera deliciosa")
      }

      func testIdentifyThrowsOnRateLimit() async {
          // Given
          mockNetworkService.stubbedResponse = (Data(), HTTPURLResponse.tooManyRequests)

          // When/Then
          await XCTAssertThrowsError(
              try await sut.identify(image: UIImage.testPlantImage)
          ) { error in
              XCTAssertEqual(error as? AppError, .rateLimitExceeded(resetsAt: nil))
          }
      }
  }
  ```
- [ ] Test Core Data storage:
  ```swift
  final class CoreDataPlantStorageTests: XCTestCase {
      var sut: CoreDataPlantStorage!
      var inMemoryStack: CoreDataStack!

      override func setUp() {
          super.setUp()
          inMemoryStack = CoreDataStack.inMemoryForTesting()
          sut = CoreDataPlantStorage(coreDataStack: inMemoryStack)
      }

      func testSaveAndFetch() async throws {
          // Given
          let plant = Plant.mock()

          // When
          try await sut.save(plant)
          let fetched = try await sut.fetch(id: plant.id)

          // Then
          XCTAssertNotNil(fetched)
          XCTAssertEqual(fetched?.scientificName, plant.scientificName)
      }

      func testDeleteRemovesPlant() async throws {
          // Given
          let plant = Plant.mock()
          try await sut.save(plant)

          // When
          try await sut.delete(id: plant.id)
          let fetched = try await sut.fetch(id: plant.id)

          // Then
          XCTAssertNil(fetched)
      }

      func testSearchFindsMatchingPlants() async throws {
          // Given
          let monstera = Plant.mock(scientificName: "Monstera deliciosa", commonNames: ["Swiss cheese plant"])
          let pothos = Plant.mock(scientificName: "Epipremnum aureum", commonNames: ["Golden pothos"])
          try await sut.save(monstera)
          try await sut.save(pothos)

          // When
          let results = try await sut.search(query: "cheese")

          // Then
          XCTAssertEqual(results.count, 1)
          XCTAssertEqual(results[0].id, monstera.id)
      }
  }
  ```
- [ ] Test image cache:
  ```swift
  final class ImageCacheTests: XCTestCase {
      var sut: ImageCache!
      var tempDirectory: URL!

      override func setUp() {
          super.setUp()
          tempDirectory = FileManager.default.temporaryDirectory.appendingPathComponent(UUID().uuidString)
          sut = ImageCache(directory: tempDirectory)
      }

      override func tearDown() {
          try? FileManager.default.removeItem(at: tempDirectory)
          super.tearDown()
      }

      func testCacheAndRetrieve() async throws {
          // Given
          let plantID = UUID()
          let url = URL(string: "https://example.com/plant.jpg")!
          // Mock network response...

          // When
          try await sut.cacheImage(from: url, for: plantID)
          let cached = await sut.getCachedImage(for: plantID, urlHash: url.absoluteString.sha256Hash)

          // Then
          XCTAssertNotNil(cached)
      }

      func testClearCacheRemovesImages() async throws {
          // Given
          let plantID = UUID()
          // ... cache some images

          // When
          await sut.clearCache(for: plantID)

          // Then
          let cached = await sut.getCachedImage(for: plantID, urlHash: "test")
          XCTAssertNil(cached)
      }
  }
  ```
- [ ] Test error mapping
- [ ] Achieve >80% code coverage for business logic
- [ ] Add test utilities and fixtures

**Acceptance Criteria:** >80% coverage on use cases and services, all critical paths tested, mocks for all dependencies

---

### 6.7 Write UI Tests for Critical Flows
- [ ] Set up UI testing infrastructure:
  ```swift
  // BotanicaUITests/Helpers/XCUIApplication+Launch.swift
  extension XCUIApplication {
      func launchWithCleanState() {
          launchArguments = ["--uitesting", "--reset-state"]
          launch()
      }

      func launchWithMockData() {
          launchArguments = ["--uitesting", "--mock-data"]
          launch()
      }

      func launchOffline() {
          launchArguments = ["--uitesting", "--offline"]
          launch()
      }
  }
  ```
- [ ] Test camera capture flow:
  ```swift
  final class CameraFlowUITests: XCTestCase {
      var app: XCUIApplication!

      override func setUp() {
          super.setUp()
          continueAfterFailure = false
          app = XCUIApplication()
          app.launchWithMockData()
      }

      func testCapturePhotoShowsIdentificationResults() {
          // Navigate to camera
          app.tabBars.buttons["Camera"].tap()

          // Capture photo (mock camera provides test image)
          let captureButton = app.buttons[AccessibilityID.cameraButton]
          XCTAssertTrue(captureButton.waitForExistence(timeout: 5))
          captureButton.tap()

          // Wait for identification results
          let resultsView = app.otherElements["identification_results"]
          XCTAssertTrue(resultsView.waitForExistence(timeout: 10))

          // Verify results displayed
          XCTAssertTrue(app.staticTexts["Monstera deliciosa"].exists)
      }

      func testCanSavePlantFromIdentification() {
          // ... navigate and capture

          // Tap save button
          app.buttons["Add to Collection"].tap()

          // Verify plant appears in collection
          app.tabBars.buttons["Collection"].tap()
          XCTAssertTrue(app.staticTexts["Monstera deliciosa"].waitForExistence(timeout: 5))
      }
  }
  ```
- [ ] Test collection management:
  ```swift
  final class CollectionUITests: XCTestCase {
      func testSearchFiltersPlants() {
          app.launchWithMockData()
          app.tabBars.buttons["Collection"].tap()

          // Search for plant
          let searchField = app.searchFields[AccessibilityID.searchField]
          searchField.tap()
          searchField.typeText("Monstera")

          // Verify filtered results
          XCTAssertTrue(app.staticTexts["Monstera deliciosa"].exists)
          XCTAssertFalse(app.staticTexts["Philodendron"].exists)
      }

      func testCanDeletePlant() {
          app.launchWithMockData()
          app.tabBars.buttons["Collection"].tap()

          // Find plant card
          let plantCard = app.otherElements["plant_card_mock_uuid"]

          // Swipe to delete
          plantCard.swipeLeft()
          app.buttons["Delete"].tap()

          // Confirm deletion
          app.alerts.buttons["Delete"].tap()

          // Verify plant removed
          XCTAssertFalse(plantCard.exists)
      }

      func testCanToggleFavorite() {
          app.launchWithMockData()
          app.tabBars.buttons["Collection"].tap()

          // Tap favorite button
          let favoriteButton = app.buttons["favorite_button_mock_uuid"]
          favoriteButton.tap()

          // Verify heart icon appears
          XCTAssertTrue(app.images["heart.fill"].exists)
      }
  }
  ```
- [ ] Test care schedule flow:
  ```swift
  final class CareScheduleUITests: XCTestCase {
      func testViewCareScheduleFromPlantDetail() {
          app.launchWithMockData()

          // Navigate to plant detail
          app.tabBars.buttons["Collection"].tap()
          app.otherElements["plant_card_mock_uuid"].tap()

          // Tap care schedule section
          app.buttons["View Care Schedule"].tap()

          // Verify schedule displayed
          XCTAssertTrue(app.staticTexts["Watering"].waitForExistence(timeout: 5))
          XCTAssertTrue(app.staticTexts["Every 7 days"].exists)
      }

      func testCanMarkTaskComplete() {
          // ... navigate to care schedule

          // Find task and complete it
          let wateringTask = app.cells["care_task_watering"]
          wateringTask.buttons["Complete"].tap()

          // Verify checkmark appears
          XCTAssertTrue(wateringTask.images["checkmark.circle.fill"].exists)
      }
  }
  ```
- [ ] Test settings flow:
  ```swift
  final class SettingsUITests: XCTestCase {
      func testOfflineModeToggle() {
          app.launchWithCleanState()
          app.tabBars.buttons["Settings"].tap()

          // Toggle offline mode
          let toggle = app.switches["offline_mode_toggle"]
          toggle.tap()

          // Verify toggle state changed
          XCTAssertEqual(toggle.value as? String, "1")
      }

      func testClearCache() {
          app.launchWithMockData()
          app.tabBars.buttons["Settings"].tap()

          // Tap clear cache
          app.buttons["Clear Image Cache"].tap()

          // Confirm in alert
          app.alerts.buttons["Clear"].tap()

          // Verify cache size updates
          XCTAssertTrue(app.staticTexts["0 bytes"].waitForExistence(timeout: 5))
      }
  }
  ```
- [ ] Test offline mode:
  ```swift
  final class OfflineModeUITests: XCTestCase {
      func testOfflineIdentificationWorks() {
          app.launchOffline()

          // Capture photo
          app.tabBars.buttons["Camera"].tap()
          app.buttons[AccessibilityID.cameraButton].tap()

          // Verify on-device identification works
          XCTAssertTrue(app.staticTexts["Identified (Offline)"].waitForExistence(timeout: 10))
      }

      func testCachedImagesDisplayOffline() {
          // First, cache some data online
          app.launchWithMockData()
          app.tabBars.buttons["Collection"].tap()
          // Wait for images to cache
          sleep(2)

          // Relaunch offline
          app.terminate()
          app.launchOffline()

          // Verify cached images display
          app.tabBars.buttons["Collection"].tap()
          let plantImage = app.images["plant_image_mock_uuid"]
          XCTAssertTrue(plantImage.waitForExistence(timeout: 5))
      }
  }
  ```
- [ ] Test error states:
  ```swift
  final class ErrorHandlingUITests: XCTestCase {
      func testNetworkErrorShowsRetry() {
          app.launchArguments.append("--simulate-network-error")
          app.launch()

          // Trigger network request
          app.tabBars.buttons["Camera"].tap()
          app.buttons[AccessibilityID.cameraButton].tap()

          // Verify error view appears
          XCTAssertTrue(app.staticTexts["No Internet Connection"].waitForExistence(timeout: 10))
          XCTAssertTrue(app.buttons["Try Again"].exists)
      }
  }
  ```
- [ ] Test accessibility:
  ```swift
  final class AccessibilityUITests: XCTestCase {
      func testVoiceOverLabelsExist() {
          app.launch()
          app.tabBars.buttons["Collection"].tap()

          // Verify accessibility labels
          let plantCard = app.otherElements["plant_card_mock_uuid"]
          XCTAssertTrue(plantCard.label.contains("Monstera deliciosa"))
      }

      func testDynamicTypeSupported() {
          // Set large text size via launch argument or UI
          app.launchArguments.append("-UIPreferredContentSizeCategoryName")
          app.launchArguments.append("UICTContentSizeCategoryAccessibilityExtraExtraExtraLarge")
          app.launch()

          // Verify app doesn't crash and elements are visible
          XCTAssertTrue(app.tabBars.buttons["Collection"].exists)
      }
  }
  ```
- [ ] Add screenshot tests for visual regression
- [ ] Create test data fixtures

**Acceptance Criteria:** All critical user flows covered, tests pass consistently, <5 min total runtime

---

### 6.8 Final QA and Bug Fixes
- [ ] Create comprehensive QA checklist:
  ```markdown
  ## Pre-Release QA Checklist

  ### Installation & Launch
  - [ ] Fresh install on iOS 17 device
  - [ ] Fresh install on iOS 18 device
  - [ ] App launches without crash
  - [ ] App launches in under 2 seconds
  - [ ] All tabs accessible

  ### Camera & Identification
  - [ ] Camera permission requested correctly
  - [ ] Camera preview displays
  - [ ] Photo capture works
  - [ ] On-device identification returns results
  - [ ] API identification returns results (online)
  - [ ] Hybrid identification works
  - [ ] Results display with confidence scores
  - [ ] Low confidence warning shown when appropriate
  - [ ] No plant detected message shown for non-plant images

  ### Plant Collection
  - [ ] Save plant to collection
  - [ ] View collection (grid mode)
  - [ ] View collection (list mode)
  - [ ] Search by common name
  - [ ] Search by scientific name
  - [ ] Filter by favorites
  - [ ] Sort by date added
  - [ ] Sort by name
  - [ ] Delete plant (swipe)
  - [ ] Delete plant (context menu)
  - [ ] Toggle favorite
  - [ ] Empty state displayed when no plants
  - [ ] Pull to refresh works

  ### Plant Detail
  - [ ] View plant detail from collection
  - [ ] View plant detail from identification
  - [ ] All plant info displayed
  - [ ] Images load (online)
  - [ ] Cached images load (offline)
  - [ ] Edit plant notes
  - [ ] View identification history

  ### Care Schedule
  - [ ] Care schedule created for new plant
  - [ ] Upcoming tasks displayed
  - [ ] Mark task complete
  - [ ] Notifications scheduled
  - [ ] Notification fires at correct time
  - [ ] Tap notification opens correct plant

  ### Settings
  - [ ] Offline mode toggle works
  - [ ] Cache size displayed correctly
  - [ ] Clear cache works
  - [ ] API status displayed
  - [ ] Network status updates
  - [ ] App version displayed

  ### Offline Mode
  - [ ] On-device identification works offline
  - [ ] Collection displays offline
  - [ ] Cached images display offline
  - [ ] Offline indicator shown
  - [ ] Graceful degradation of API features

  ### Performance
  - [ ] App launch < 2 seconds
  - [ ] Identification < 500ms (on-device)
  - [ ] Smooth scrolling (60fps)
  - [ ] No memory warnings
  - [ ] No excessive battery drain

  ### Accessibility
  - [ ] VoiceOver navigation works
  - [ ] Dynamic Type scales correctly
  - [ ] Reduce Motion respected
  - [ ] Color contrast sufficient
  - [ ] All buttons have labels

  ### Edge Cases
  - [ ] Very long plant names display
  - [ ] 500+ plants in collection
  - [ ] Rapid capture attempts
  - [ ] Background/foreground transitions
  - [ ] Low storage device
  - [ ] Interrupted network during API call
  - [ ] App update migration
  ```
- [ ] Fix critical bugs discovered during QA
- [ ] Fix high-priority bugs
- [ ] Document known issues for v1.0
- [ ] Create App Store screenshots
- [ ] Write App Store description
- [ ] Create privacy policy page
- [ ] Prepare App Store review notes
- [ ] Final build and archive
- [ ] TestFlight distribution
- [ ] Beta tester feedback round
- [ ] Address beta feedback
- [ ] Final submission build

**Acceptance Criteria:** All QA checklist items pass, no critical/high bugs remaining, app approved for release

---

## End-of-Phase Validation

### Functional Verification

| Test | Steps | Expected Result | Status |
|------|-------|-----------------|--------|
| Settings Persist | Change setting → restart app | Setting retained | [ ] |
| Offline Mode | Enable offline → identify plant | Uses on-device only | [ ] |
| Clear Cache | Clear cache | Cache size shows 0 bytes | [ ] |
| API Status | View settings with network | Shows "Available" | [ ] |
| API Status Offline | View settings without network | Shows "Unavailable" | [ ] |
| Error View | Trigger network error | Error view with retry button | [ ] |
| Error Retry | Tap retry on error | Action retries | [ ] |
| Error Dismiss | Tap dismiss on error | Error view closes | [ ] |
| Loading Skeleton | Load collection | Skeleton shown during load | [ ] |
| Shimmer Animation | View skeleton | Smooth shimmer effect | [ ] |
| VoiceOver Navigation | Navigate with VoiceOver | All elements accessible | [ ] |
| Dynamic Type Large | Set accessibility large text | UI scales correctly | [ ] |
| Dynamic Type Small | Set accessibility small text | UI scales correctly | [ ] |
| Reduce Motion | Enable reduce motion | No animations | [ ] |
| Unit Tests Pass | Run unit tests | All pass | [ ] |
| UI Tests Pass | Run UI tests | All pass | [ ] |
| No Memory Leaks | Profile with Instruments | No leaks detected | [ ] |
| No Crashes | Extended usage session | No crashes | [ ] |

### Code Quality Verification

| Check | Criteria | Status |
|-------|----------|--------|
| Build | Project builds with zero warnings | [ ] |
| SwiftLint | No lint warnings | [ ] |
| Unit Test Coverage | >80% on business logic | [ ] |
| UI Test Coverage | All critical flows | [ ] |
| Accessibility Audit | All elements have labels | [ ] |
| Error Handling | All errors use AppError | [ ] |
| Loading States | All async operations have loading state | [ ] |
| Skeleton Views | All lists have skeleton placeholders | [ ] |
| Settings Persistence | All settings use UserDefaults correctly | [ ] |
| Memory Management | No retain cycles | [ ] |
| Thread Safety | No data races | [ ] |
| API Error Handling | All API errors handled gracefully | [ ] |
| Offline Handling | All features degrade gracefully | [ ] |

### Performance Verification

| Metric | Target | Actual | Status |
|--------|--------|--------|--------|
| Cold Launch | < 2 seconds | | [ ] |
| Warm Launch | < 1 second | | [ ] |
| Time to First Frame | < 400ms | | [ ] |
| ML Model Load | < 500ms | | [ ] |
| On-Device Inference | < 500ms | | [ ] |
| API Identification | < 3 seconds | | [ ] |
| Collection Load (100 plants) | < 500ms | | [ ] |
| Search Response | < 200ms | | [ ] |
| Image Cache Hit | < 20ms | | [ ] |
| Memory (typical usage) | < 150MB | | [ ] |
| Memory (500 plants) | < 250MB | | [ ] |
| Battery (1 hour usage) | < 10% | | [ ] |
| Scroll Frame Rate | 60fps | | [ ] |
| UI Test Suite | < 5 minutes | | [ ] |
| Unit Test Suite | < 30 seconds | | [ ] |

### Accessibility Verification

| Test | Steps | Expected Result | Status |
|------|-------|-----------------|--------|
| VoiceOver Camera | Navigate camera with VO | Capture button announced | [ ] |
| VoiceOver Collection | Navigate collection with VO | All plants announced | [ ] |
| VoiceOver Plant Detail | Navigate detail with VO | All info read | [ ] |
| VoiceOver Care Schedule | Navigate schedule with VO | Tasks announced | [ ] |
| VoiceOver Settings | Navigate settings with VO | All options announced | [ ] |
| Dynamic Type XXL | Use accessibility XXL size | All text readable | [ ] |
| Dynamic Type XS | Use accessibility XS size | UI not broken | [ ] |
| Bold Text | Enable bold text | Text becomes bold | [ ] |
| Reduce Motion | Enable reduce motion | No spring animations | [ ] |
| Reduce Transparency | Enable reduce transparency | Solid backgrounds | [ ] |
| Increase Contrast | Enable increase contrast | Higher contrast | [ ] |
| Color Blind (Protanopia) | Simulate color blindness | UI distinguishable | [ ] |
| Color Blind (Deuteranopia) | Simulate color blindness | UI distinguishable | [ ] |

### Error Handling Verification

| Test | Trigger | Expected Result | Status |
|------|---------|-----------------|--------|
| Network Unavailable | Disable network | Error view with retry | [ ] |
| Network Timeout | Slow network simulation | Timeout error shown | [ ] |
| API Rate Limit | Exceed rate limit | Rate limit message | [ ] |
| API Quota Exceeded | Use all daily quota | Quota message | [ ] |
| Camera Denied | Deny camera permission | Permission error | [ ] |
| Photos Denied | Deny photos permission | Permission error | [ ] |
| Notification Denied | Deny notifications | Notification error | [ ] |
| Save Failed | Simulate save error | Save error message | [ ] |
| Model Not Loaded | Access model before load | Model error | [ ] |
| Invalid Image | Provide corrupt image | Invalid image error | [ ] |
| No Plant Detected | Photo of non-plant | No plant message | [ ] |
| Low Confidence | Ambiguous plant photo | Low confidence warning | [ ] |

### Release Readiness Verification

| Item | Criteria | Status |
|------|----------|--------|
| App Icon | All sizes provided | [ ] |
| Launch Screen | Displays correctly | [ ] |
| App Store Screenshots | All device sizes | [ ] |
| App Store Description | Written and reviewed | [ ] |
| Privacy Policy | URL accessible | [ ] |
| Terms of Service | URL accessible | [ ] |
| API Keys | Production keys configured | [ ] |
| Bundle ID | Production ID set | [ ] |
| Version Number | Set to 1.0.0 | [ ] |
| Build Number | Incremented | [ ] |
| Code Signing | Production certificate | [ ] |
| Provisioning | App Store profile | [ ] |
| Archive | Builds successfully | [ ] |
| App Store Connect | App record created | [ ] |
| TestFlight | Build uploaded | [ ] |
| Beta Testing | Feedback addressed | [ ] |
| App Review Notes | Written | [ ] |

---

## Phase 6 Completion Checklist

- [ ] All 8 tasks completed
- [ ] All functional tests pass
- [ ] All code quality checks pass
- [ ] All performance targets met
- [ ] All accessibility tests pass
- [ ] All error handling tests pass
- [ ] Settings view complete with all options
- [ ] Error handling comprehensive with user-friendly messages
- [ ] Loading states with shimmer animations
- [ ] Full accessibility support (VoiceOver, Dynamic Type, Reduce Motion)
- [ ] Performance optimized (launch, inference, scrolling)
- [ ] Unit tests >80% coverage on business logic
- [ ] UI tests cover all critical flows
- [ ] QA checklist completed
- [ ] All critical/high bugs fixed
- [ ] App Store assets prepared
- [ ] TestFlight beta completed
- [ ] Ready for App Store submission

---

## Error Handling Summary

### Settings Errors
```swift
enum SettingsError: Error, LocalizedError {
    case cacheCleanupFailed
    case dataDeleteFailed
    case preferenceSaveFailed

    var errorDescription: String? {
        switch self {
        case .cacheCleanupFailed: return "Failed to clear cache"
        case .dataDeleteFailed: return "Failed to delete data"
        case .preferenceSaveFailed: return "Failed to save preference"
        }
    }
}
```

---

## Notes

- Error messages should be actionable and user-friendly
- Loading skeletons should match the approximate layout of real content
- Accessibility is not optional - test thoroughly with real VoiceOver users if possible
- Performance testing should be done on oldest supported device (iPhone 8 / iOS 17)
- UI tests should be deterministic - avoid flaky tests
- Beta testers should include diverse users (different devices, usage patterns)
- App Store review may take 24-48 hours - plan accordingly
- Keep crash reporting enabled even after release for production monitoring

---

## Dependencies

| Dependency | Type | Notes |
|------------|------|-------|
| NWPathMonitor | System | Network reachability |
| UIAccessibility | System | VoiceOver announcements |
| XCTest | System | Unit testing |
| XCUITest | System | UI testing |
| UserDefaults | System | Settings persistence |
| Bundle | System | App version info |

---

## Risk Mitigation

| Risk | Mitigation |
|------|------------|
| App Store rejection | Follow all guidelines, provide complete review notes |
| Performance regression | Automated performance tests in CI |
| Accessibility issues | Test with real VoiceOver users |
| Flaky UI tests | Use explicit waits, deterministic test data |
| Missing error cases | Comprehensive error type coverage |
| Memory leaks | Regular Instruments profiling |
| Beta feedback overload | Prioritize critical issues, defer nice-to-haves |
| Last-minute bugs | Freeze features early, focus on stability |
| App Review delays | Submit early, have contingency timeline |
| Certificate expiry | Verify certificates before submission |