Add email notification preference for task completion

- Add emailTaskCompleted field to NotificationPreference model
- Add email preference toggle to notification settings UI (iOS & Android)
- Add localized strings for email notifications section
- Update ViewModel to support email preference updates

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

composeApp/src/commonMain/composeResources/values/strings.xml

@@ -390,6 +390,11 @@
     <string name="notifications_warranty_expiring">Warranty Expiring</string>
     <string name="notifications_warranty_expiring_desc">Reminders for expiring warranties</string>
 
+    <!-- Email Notifications -->
+    <string name="notifications_email_section">Email Notifications</string>
+    <string name="notifications_email_task_completed">Task Completed Email</string>
+    <string name="notifications_email_task_completed_desc">Receive email when a task is completed</string>
+
     <!-- Common -->
     <string name="common_save">Save</string>
     <string name="common_cancel">Cancel</string>

composeApp/src/commonMain/kotlin/com/example/casera/models/Notification.kt

@@ -40,7 +40,10 @@ data class NotificationPreference(
     @SerialName("residence_shared")
     val residenceShared: Boolean = true,
     @SerialName("warranty_expiring")
-    val warrantyExpiring: Boolean = true
+    val warrantyExpiring: Boolean = true,
+    // Email preferences
+    @SerialName("email_task_completed")
+    val emailTaskCompleted: Boolean = true
 )
 
 @Serializable
@@ -56,7 +59,10 @@ data class UpdateNotificationPreferencesRequest(
     @SerialName("residence_shared")
     val residenceShared: Boolean? = null,
     @SerialName("warranty_expiring")
-    val warrantyExpiring: Boolean? = null
+    val warrantyExpiring: Boolean? = null,
+    // Email preferences
+    @SerialName("email_task_completed")
+    val emailTaskCompleted: Boolean? = null
 )
 
 @Serializable

composeApp/src/commonMain/kotlin/com/example/casera/ui/screens/NotificationPreferencesScreen.kt

@@ -35,6 +35,7 @@ fun NotificationPreferencesScreen(
     var taskAssigned by remember { mutableStateOf(true) }
     var residenceShared by remember { mutableStateOf(true) }
     var warrantyExpiring by remember { mutableStateOf(true) }
+    var emailTaskCompleted by remember { mutableStateOf(true) }
 
     // Load preferences on first render
     LaunchedEffect(Unit) {
@@ -51,6 +52,7 @@ fun NotificationPreferencesScreen(
             taskAssigned = prefs.taskAssigned
             residenceShared = prefs.residenceShared
             warrantyExpiring = prefs.warrantyExpiring
+            emailTaskCompleted = prefs.emailTaskCompleted
         }
     }
 
@@ -294,6 +296,36 @@ fun NotificationPreferencesScreen(
                         }
                     }
 
+                    // Email Notifications Section
+                    Text(
+                        stringResource(Res.string.notifications_email_section),
+                        style = MaterialTheme.typography.titleMedium,
+                        fontWeight = FontWeight.SemiBold,
+                        modifier = Modifier.padding(top = AppSpacing.md)
+                    )
+
+                    Card(
+                        modifier = Modifier.fillMaxWidth(),
+                        shape = RoundedCornerShape(AppRadius.md),
+                        colors = CardDefaults.cardColors(
+                            containerColor = MaterialTheme.colorScheme.surfaceVariant
+                        )
+                    ) {
+                        Column {
+                            NotificationToggle(
+                                title = stringResource(Res.string.notifications_email_task_completed),
+                                description = stringResource(Res.string.notifications_email_task_completed_desc),
+                                icon = Icons.Default.Email,
+                                iconTint = MaterialTheme.colorScheme.primary,
+                                checked = emailTaskCompleted,
+                                onCheckedChange = {
+                                    emailTaskCompleted = it
+                                    viewModel.updatePreference(emailTaskCompleted = it)
+                                }
+                            )
+                        }
+                    }
+
                     Spacer(modifier = Modifier.height(AppSpacing.xl))
                 }
             }

composeApp/src/commonMain/kotlin/com/example/casera/viewmodel/NotificationPreferencesViewModel.kt

@@ -36,7 +36,8 @@ class NotificationPreferencesViewModel : ViewModel() {
         taskCompleted: Boolean? = null,
         taskAssigned: Boolean? = null,
         residenceShared: Boolean? = null,
-        warrantyExpiring: Boolean? = null
+        warrantyExpiring: Boolean? = null,
+        emailTaskCompleted: Boolean? = null
     ) {
         viewModelScope.launch {
             _updateState.value = ApiResult.Loading
@@ -46,7 +47,8 @@ class NotificationPreferencesViewModel : ViewModel() {
                 taskCompleted = taskCompleted,
                 taskAssigned = taskAssigned,
                 residenceShared = residenceShared,
-                warrantyExpiring = warrantyExpiring
+                warrantyExpiring = warrantyExpiring,
+                emailTaskCompleted = emailTaskCompleted
             )
             val result = APILayer.updateNotificationPreferences(request)
             _updateState.value = when (result) {

iosApp/iosApp/Helpers/L10n.swift

@@ -540,6 +540,11 @@ enum L10n {
         static var warrantyExpiring: String { String(localized: "profile_warranty_expiring") }
         static var warrantyExpiringDescription: String { String(localized: "profile_warranty_expiring_description") }
         static var otherNotifications: String { String(localized: "profile_other_notifications") }
+
+        // Email Notifications
+        static var emailNotifications: String { String(localized: "profile_email_notifications") }
+        static var emailTaskCompleted: String { String(localized: "profile_email_task_completed") }
+        static var emailTaskCompletedDescription: String { String(localized: "profile_email_task_completed_description") }
     }
 
     // MARK: - Settings

iosApp/iosApp/Localizable.xcstrings

@@ -17844,6 +17844,17 @@
         }
       }
     },
+    "profile_email_notifications" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Email Notifications"
+          }
+        }
+      }
+    },
     "profile_email_required_unique" : {
       "extractionState" : "manual",
       "localizations" : {
@@ -17909,6 +17920,28 @@
         }
       }
     },
+    "profile_email_task_completed" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Task Completed Email"
+          }
+        }
+      }
+    },
+    "profile_email_task_completed_description" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Receive email when a task is completed"
+          }
+        }
+      }
+    },
     "profile_first_name" : {
       "extractionState" : "manual",
       "localizations" : {

iosApp/iosApp/Profile/NotificationPreferencesView.swift

@@ -191,6 +191,31 @@ struct NotificationPreferencesView: View {
                         Text(L10n.Profile.otherNotifications)
                     }
                     .listRowBackground(Color.appBackgroundSecondary)
+
+                    // Email Notifications
+                    Section {
+                        Toggle(isOn: $viewModel.emailTaskCompleted) {
+                            Label {
+                                VStack(alignment: .leading, spacing: 2) {
+                                    Text(L10n.Profile.emailTaskCompleted)
+                                        .foregroundColor(Color.appTextPrimary)
+                                    Text(L10n.Profile.emailTaskCompletedDescription)
+                                        .font(.caption)
+                                        .foregroundColor(Color.appTextSecondary)
+                                }
+                            } icon: {
+                                Image(systemName: "envelope.fill")
+                                    .foregroundColor(Color.appPrimary)
+                            }
+                        }
+                        .tint(Color.appPrimary)
+                        .onChange(of: viewModel.emailTaskCompleted) { _, newValue in
+                            viewModel.updatePreference(emailTaskCompleted: newValue)
+                        }
+                    } header: {
+                        Text(L10n.Profile.emailNotifications)
+                    }
+                    .listRowBackground(Color.appBackgroundSecondary)
                 }
             }
             .listStyle(.plain)
@@ -223,6 +248,7 @@ class NotificationPreferencesViewModelWrapper: ObservableObject {
     @Published var taskAssigned: Bool = true
     @Published var residenceShared: Bool = true
     @Published var warrantyExpiring: Bool = true
+    @Published var emailTaskCompleted: Bool = true
 
     @Published var isLoading: Bool = false
     @Published var errorMessage: String?
@@ -243,6 +269,7 @@ class NotificationPreferencesViewModelWrapper: ObservableObject {
                     self.taskAssigned = prefs.taskAssigned
                     self.residenceShared = prefs.residenceShared
                     self.warrantyExpiring = prefs.warrantyExpiring
+                    self.emailTaskCompleted = prefs.emailTaskCompleted
                     self.isLoading = false
                     self.errorMessage = nil
                 } else if let error = result as? ApiResultError {
@@ -262,7 +289,8 @@ class NotificationPreferencesViewModelWrapper: ObservableObject {
         taskCompleted: Bool? = nil,
         taskAssigned: Bool? = nil,
         residenceShared: Bool? = nil,
-        warrantyExpiring: Bool? = nil
+        warrantyExpiring: Bool? = nil,
+        emailTaskCompleted: Bool? = nil
     ) {
         isSaving = true
 
@@ -274,7 +302,8 @@ class NotificationPreferencesViewModelWrapper: ObservableObject {
                     taskCompleted: taskCompleted.map { KotlinBoolean(bool: $0) },
                     taskAssigned: taskAssigned.map { KotlinBoolean(bool: $0) },
                     residenceShared: residenceShared.map { KotlinBoolean(bool: $0) },
-                    warrantyExpiring: warrantyExpiring.map { KotlinBoolean(bool: $0) }
+                    warrantyExpiring: warrantyExpiring.map { KotlinBoolean(bool: $0) },
+                    emailTaskCompleted: emailTaskCompleted.map { KotlinBoolean(bool: $0) }
                 )
                 let result = try await APILayer.shared.updateNotificationPreferences(request: request)