Add Progress Photos feature for plant growth tracking (Phase 8)

Implement progress photo capture with HEIC compression and thumbnail generation, gallery view with grid display and full-size viewing, time-lapse playback with adjustable speed, and photo reminder notifications at weekly/biweekly/monthly intervals. New files: - ProgressPhoto domain entity with imageData and thumbnailData - ProgressPhotoRepositoryProtocol and CoreDataProgressPhotoRepository - CaptureProgressPhotoUseCase with image compression/resizing - SchedulePhotoReminderUseCase with notification scheduling - ProgressPhotosViewModel, ProgressPhotoGalleryView - ProgressPhotoCaptureView, TimeLapsePlayerView Modified: - PlantMO with progressPhotos relationship - Core Data model with ProgressPhotoMO entity - NotificationService with photo reminder support - PlantDetailView with Progress Photos section - DIContainer with photo service registrations Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-23 15:40:50 -06:00
parent f41c77876a
commit 4fcec31c02
17 changed files with 3315 additions and 12 deletions
--- a/PlantGuide.xcodeproj/project.pbxproj
+++ b/PlantGuide.xcodeproj/project.pbxproj
@@ -65,15 +65,11 @@
 		};
 		1C4B79FC2F21C37C00ED69CF /* PlantGuideTests */ = {
 			isa = PBXFileSystemSynchronizedRootGroup;
-			exceptions = (
-			);
 			path = PlantGuideTests;
 			sourceTree = "<group>";
 		};
 		1C4B7A062F21C37C00ED69CF /* PlantGuideUITests */ = {
 			isa = PBXFileSystemSynchronizedRootGroup;
-			exceptions = (
-			);
 			path = PlantGuideUITests;
 			sourceTree = "<group>";
 		};
@@ -111,7 +107,6 @@
 				DADA0723BB8443C632252796 /* TaskSection.swift */,
 				678533C17B8C3244E2001F4F /* RoomTaskGroup.swift */,
 			);
-			name = Components;
 			path = Components;
 			sourceTree = "<group>";
 		};
@@ -141,7 +136,6 @@
 			children = (
 				775B6E967C5DFFD7F1871824 /* Repositories */,
 			);
-			name = Data;
 			path = Data;
 			sourceTree = "<group>";
 		};
@@ -150,7 +144,6 @@
 			children = (
 				52FD1E71E8C36B0075A932F2 /* InMemoryRoomRepository.swift */,
 			);
-			name = Repositories;
 			path = Repositories;
 			sourceTree = "<group>";
 		};
@@ -160,7 +153,6 @@
 				DEFE3CA84863FD85C7F7BB48 /* Presentation */,
 				43A10090BDB504EEA8160579 /* Data */,
 			);
-			name = PlantGuide;
 			path = PlantGuide;
 			sourceTree = "<group>";
 		};
@@ -169,7 +161,6 @@
 			children = (
 				EB55B50C41964C736A4FF8A3 /* TodayView */,
 			);
-			name = Scenes;
 			path = Scenes;
 			sourceTree = "<group>";
 		};
@@ -178,7 +169,6 @@
 			children = (
 				96D83367DDD373621B7CA753 /* Scenes */,
 			);
-			name = Presentation;
 			path = Presentation;
 			sourceTree = "<group>";
 		};
@@ -189,7 +179,6 @@
 				7A9D5ED974C43A2EC68CD03B /* TodayView.swift */,
 				1A0266DEC4BEC766E4813767 /* Components */,
 			);
-			name = TodayView;
 			path = TodayView;
 			sourceTree = "<group>";
 		};
--- a/PlantGuide/Core/DI/DIContainer.swift
+++ b/PlantGuide/Core/DI/DIContainer.swift
@@ -23,6 +23,7 @@ protocol DIContainerProtocol: AnyObject, Sendable {
    func makeSettingsViewModel() -> SettingsViewModel
    func makeBrowsePlantsViewModel() -> BrowsePlantsViewModel
    func makeTodayViewModel() -> TodayViewModel
+    func makeProgressPhotosViewModel(plantID: UUID, plantName: String) -> ProgressPhotosViewModel

    // MARK: - Registration
    func register<T>(type: T.Type, factory: @escaping @MainActor () -> T)
@@ -244,6 +245,28 @@ final class DIContainer: DIContainerProtocol, ObservableObject {
        }
    }()

+    // MARK: - Progress Photo Services
+
+    private lazy var _coreDataProgressPhotoStorage: LazyService<CoreDataProgressPhotoRepository> = {
+        LazyService {
+            CoreDataProgressPhotoRepository(coreDataStack: CoreDataStack.shared)
+        }
+    }()
+
+    private lazy var _captureProgressPhotoUseCase: LazyService<CaptureProgressPhotoUseCase> = {
+        LazyService { [weak self] in
+            guard let self else { fatalError("DIContainer deallocated unexpectedly") }
+            return CaptureProgressPhotoUseCase(progressPhotoRepository: self.progressPhotoRepository)
+        }
+    }()
+
+    private lazy var _schedulePhotoReminderUseCase: LazyService<SchedulePhotoReminderUseCase> = {
+        LazyService { [weak self] in
+            guard let self else { fatalError("DIContainer deallocated unexpectedly") }
+            return SchedulePhotoReminderUseCase(notificationService: self.notificationService)
+        }
+    }()
+
    // MARK: - Local Plant Database Services

    private lazy var _plantDatabaseService: LazyService<PlantDatabaseService> = {
@@ -326,6 +349,23 @@ final class DIContainer: DIContainerProtocol, ObservableObject {
        _manageRoomsUseCase.value
    }

+    // MARK: - Progress Photo Accessors
+
+    /// Progress photo repository backed by Core Data
+    var progressPhotoRepository: ProgressPhotoRepositoryProtocol {
+        _coreDataProgressPhotoStorage.value
+    }
+
+    /// Use case for capturing progress photos
+    var captureProgressPhotoUseCase: CaptureProgressPhotoUseCaseProtocol {
+        _captureProgressPhotoUseCase.value
+    }
+
+    /// Use case for scheduling photo reminders
+    var schedulePhotoReminderUseCase: SchedulePhotoReminderUseCaseProtocol {
+        _schedulePhotoReminderUseCase.value
+    }
+
    // MARK: - Initialization

    private init() {}
@@ -564,6 +604,17 @@ final class DIContainer: DIContainerProtocol, ObservableObject {
        RoomsViewModel(manageRoomsUseCase: manageRoomsUseCase)
    }

+    /// Factory method for ProgressPhotosViewModel
+    func makeProgressPhotosViewModel(plantID: UUID, plantName: String) -> ProgressPhotosViewModel {
+        ProgressPhotosViewModel(
+            plantID: plantID,
+            plantName: plantName,
+            progressPhotoRepository: progressPhotoRepository,
+            captureProgressPhotoUseCase: captureProgressPhotoUseCase,
+            schedulePhotoReminderUseCase: schedulePhotoReminderUseCase
+        )
+    }
+
    /// Factory method for TodayViewModel
    func makeTodayViewModel() -> TodayViewModel {
        TodayViewModel(
@@ -639,6 +690,10 @@ final class DIContainer: DIContainerProtocol, ObservableObject {
        _coreDataRoomStorage.reset()
        _createDefaultRoomsUseCase.reset()
        _manageRoomsUseCase.reset()
+        // Progress photo services
+        _coreDataProgressPhotoStorage.reset()
+        _captureProgressPhotoUseCase.reset()
+        _schedulePhotoReminderUseCase.reset()
        factories.removeAll()
        resolvedInstances.removeAll()
    }
@@ -732,6 +787,10 @@ final class MockDIContainer: DIContainerProtocol {
        )
    }

+    func makeProgressPhotosViewModel(plantID: UUID, plantName: String) -> ProgressPhotosViewModel {
+        ProgressPhotosViewModel(plantID: plantID, plantName: plantName)
+    }
+
    func register<T>(type: T.Type, factory: @escaping @MainActor () -> T) {
        factories[String(describing: type)] = factory
    }
--- a/PlantGuide/Core/Services/NotificationService.swift
+++ b/PlantGuide/Core/Services/NotificationService.swift
@@ -60,6 +60,17 @@ protocol NotificationServiceProtocol: Sendable {
    ///   - plantID: The unique identifier of the plant
    func cancelReminders(for taskType: CareTaskType, plantID: UUID) async

+    /// Schedule a recurring photo reminder for a plant
+    /// - Parameters:
+    ///   - plantID: The unique identifier of the plant
+    ///   - plantName: The name of the plant to display in the notification
+    ///   - interval: The interval between photo reminders
+    func schedulePhotoReminder(for plantID: UUID, plantName: String, interval: PhotoReminderInterval) async throws
+
+    /// Cancel a scheduled photo reminder for a plant
+    /// - Parameter plantID: The unique identifier of the plant
+    func cancelPhotoReminder(for plantID: UUID) async
+
    /// Update the app badge count
    /// - Parameter count: The number to display on the app badge
    func updateBadgeCount(_ count: Int) async
@@ -79,15 +90,24 @@ private enum NotificationConstants {
    /// Category identifier for care reminder notifications
    static let careReminderCategory = "CARE_REMINDER"

+    /// Category identifier for progress photo reminder notifications
+    static let progressPhotoReminderCategory = "PROGRESS_PHOTO_REMINDER"
+
    /// Action identifier for marking a task as complete
    static let completeAction = "COMPLETE"

    /// Action identifier for snoozing the reminder
    static let snoozeAction = "SNOOZE"

+    /// Action identifier for taking a photo
+    static let takePhotoAction = "TAKE_PHOTO"
+
    /// Prefix for notification identifiers
    static let notificationPrefix = "care-"

+    /// Prefix for photo reminder notification identifiers
+    static let photoReminderPrefix = "photo-"
+
    /// User info key for task ID
    static let taskIDKey = "taskID"

@@ -97,6 +117,9 @@ private enum NotificationConstants {
    /// User info key for task type
    static let taskTypeKey = "taskType"

+    /// User info key for notification category
+    static let categoryKey = "category"
+
    /// Snooze duration in seconds (1 hour)
    static let snoozeDuration: TimeInterval = 3600
 }
@@ -141,7 +164,21 @@ actor NotificationService: NotificationServiceProtocol {
            options: [.customDismissAction]
        )

-        UNUserNotificationCenter.current().setNotificationCategories([careReminderCategory])
+        // Progress photo reminder category
+        let takePhotoAction = UNNotificationAction(
+            identifier: NotificationConstants.takePhotoAction,
+            title: "Take Photo",
+            options: [.foreground]
+        )
+
+        let progressPhotoCategory = UNNotificationCategory(
+            identifier: NotificationConstants.progressPhotoReminderCategory,
+            actions: [takePhotoAction],
+            intentIdentifiers: [],
+            options: []
+        )
+
+        UNUserNotificationCenter.current().setNotificationCategories([careReminderCategory, progressPhotoCategory])
    }

    // MARK: - Public Interface
@@ -282,6 +319,71 @@ actor NotificationService: NotificationServiceProtocol {
        notificationCenter.removeAllDeliveredNotifications()
    }

+    // MARK: - Photo Reminder Methods
+
+    /// Schedule a recurring photo reminder for a plant
+    /// - Parameters:
+    ///   - plantID: The unique identifier of the plant
+    ///   - plantName: The name of the plant to display in the notification
+    ///   - interval: The interval between photo reminders
+    /// - Throws: `NotificationError.schedulingFailed` if the notification cannot be scheduled
+    func schedulePhotoReminder(for plantID: UUID, plantName: String, interval: PhotoReminderInterval) async throws {
+        // Cancel any existing photo reminder for this plant
+        await cancelPhotoReminder(for: plantID)
+
+        // If interval is off, just cancel and return
+        if interval == .off {
+            return
+        }
+
+        // Create notification content
+        let content = UNMutableNotificationContent()
+        content.title = "Progress Photo Reminder"
+        content.body = "Time to capture a progress photo of \(plantName)!"
+        content.sound = .default
+        content.categoryIdentifier = NotificationConstants.progressPhotoReminderCategory
+
+        // Store plant information in userInfo
+        content.userInfo = [
+            NotificationConstants.plantIDKey: plantID.uuidString,
+            NotificationConstants.categoryKey: NotificationConstants.progressPhotoReminderCategory
+        ]
+
+        // Create time interval trigger based on the reminder interval
+        let timeInterval: TimeInterval
+        switch interval {
+        case .weekly:
+            timeInterval = 7 * 24 * 60 * 60 // 7 days
+        case .biweekly:
+            timeInterval = 14 * 24 * 60 * 60 // 14 days
+        case .monthly:
+            timeInterval = 30 * 24 * 60 * 60 // 30 days
+        case .off:
+            return // Already handled above, but required for exhaustive switch
+        }
+
+        let trigger = UNTimeIntervalNotificationTrigger(timeInterval: timeInterval, repeats: true)
+
+        // Create notification request with unique identifier
+        let identifier = photoReminderIdentifier(for: plantID)
+        let request = UNNotificationRequest(identifier: identifier, content: content, trigger: trigger)
+
+        // Schedule the notification
+        do {
+            try await notificationCenter.add(request)
+        } catch {
+            throw NotificationError.schedulingFailed(error)
+        }
+    }
+
+    /// Cancel a scheduled photo reminder for a plant
+    /// - Parameter plantID: The unique identifier of the plant
+    func cancelPhotoReminder(for plantID: UUID) async {
+        let identifier = photoReminderIdentifier(for: plantID)
+        notificationCenter.removePendingNotificationRequests(withIdentifiers: [identifier])
+        notificationCenter.removeDeliveredNotifications(withIdentifiers: [identifier])
+    }
+
    // MARK: - Private Methods

    /// Generate a consistent notification identifier for a task
@@ -290,6 +392,13 @@ actor NotificationService: NotificationServiceProtocol {
    private func notificationIdentifier(for taskID: UUID) -> String {
        "\(NotificationConstants.notificationPrefix)\(taskID.uuidString)"
    }
+
+    /// Generate a consistent notification identifier for a photo reminder
+    /// - Parameter plantID: The unique identifier of the plant
+    /// - Returns: A string identifier in the format "photo-{plantID}"
+    private func photoReminderIdentifier(for plantID: UUID) -> String {
+        "\(NotificationConstants.photoReminderPrefix)\(plantID.uuidString)"
+    }
 }

 // MARK: - CareTaskType Display Extension
--- a/PlantGuide/Data/DataSources/Local/CoreData/CoreDataProgressPhotoRepository.swift
+++ b/PlantGuide/Data/DataSources/Local/CoreData/CoreDataProgressPhotoRepository.swift
@@ -0,0 +1,161 @@
+//
+//  CoreDataProgressPhotoRepository.swift
+//  PlantGuide
+//
+//  Core Data implementation of progress photo repository.
+//  Provides persistent storage for plant progress photos.
+//
+
+import CoreData
+import Foundation
+
+// MARK: - Core Data Progress Photo Repository
+
+/// Core Data-backed implementation of the progress photo repository.
+/// Handles all persistent storage operations for plant progress photos.
+final class CoreDataProgressPhotoRepository: ProgressPhotoRepositoryProtocol, @unchecked Sendable {
+
+    // MARK: - Properties
+
+    /// The Core Data stack used for persistence operations
+    private let coreDataStack: CoreDataStackProtocol
+
+    /// Entity name for progress photo managed objects
+    private let progressPhotoEntityName = "ProgressPhotoMO"
+
+    /// Entity name for plant managed objects
+    private let plantEntityName = "PlantMO"
+
+    // MARK: - Initialization
+
+    /// Creates a new Core Data progress photo repository instance
+    /// - Parameter coreDataStack: The Core Data stack to use for persistence
+    init(coreDataStack: CoreDataStackProtocol = CoreDataStack.shared) {
+        self.coreDataStack = coreDataStack
+    }
+
+    // MARK: - ProgressPhotoRepositoryProtocol
+
+    /// Saves a progress photo to Core Data.
+    ///
+    /// If a photo with the same ID already exists, it will be updated.
+    /// Both imageData and thumbnailData are saved atomically.
+    /// The plant relationship is established based on the photo's plantID.
+    ///
+    /// - Parameter photo: The progress photo entity to save.
+    /// - Throws: An error if the save operation fails.
+    func save(_ photo: ProgressPhoto) async throws {
+        try await coreDataStack.performBackgroundTask { context in
+            // Check if photo already exists
+            let fetchRequest = ProgressPhotoMO.fetchRequest()
+            fetchRequest.predicate = NSPredicate(format: "id == %@", photo.id as CVarArg)
+            fetchRequest.fetchLimit = 1
+
+            let existingPhotos = try context.fetch(fetchRequest)
+
+            if let existingPhoto = existingPhotos.first {
+                // Update existing photo
+                existingPhoto.update(from: photo)
+                existingPhoto.setPlant(id: photo.plantID, context: context)
+            } else {
+                // Create new photo
+                let photoMO = ProgressPhotoMO.fromDomainModel(photo, context: context)
+                photoMO.setPlant(id: photo.plantID, context: context)
+            }
+
+            return ()
+        }
+    }
+
+    /// Fetches a progress photo by its unique identifier.
+    ///
+    /// - Parameter id: The unique identifier of the photo to fetch.
+    /// - Returns: The progress photo if found, or nil if no photo exists with the given ID.
+    /// - Throws: An error if the fetch operation fails.
+    func fetch(id: UUID) async throws -> ProgressPhoto? {
+        try await coreDataStack.performBackgroundTask { context in
+            let fetchRequest = ProgressPhotoMO.fetchRequest()
+            fetchRequest.predicate = NSPredicate(format: "id == %@", id as CVarArg)
+            fetchRequest.fetchLimit = 1
+
+            let results = try context.fetch(fetchRequest)
+            return results.first?.toDomainModel()
+        }
+    }
+
+    /// Fetches all progress photos for a specific plant, sorted by dateTaken descending.
+    ///
+    /// Photos are returned with the newest first, which is the typical display order
+    /// for a photo timeline or gallery.
+    ///
+    /// - Parameter plantID: The unique identifier of the plant whose photos to fetch.
+    /// - Returns: An array of progress photos for the plant, sorted by dateTaken descending.
+    /// - Throws: An error if the fetch operation fails.
+    func fetchAll(for plantID: UUID) async throws -> [ProgressPhoto] {
+        try await coreDataStack.performBackgroundTask { context in
+            let fetchRequest = ProgressPhotoMO.fetchRequest()
+            fetchRequest.predicate = NSPredicate(format: "plantID == %@", plantID as CVarArg)
+            fetchRequest.sortDescriptors = [NSSortDescriptor(key: "dateTaken", ascending: false)]
+
+            let results = try context.fetch(fetchRequest)
+            return results.map { $0.toDomainModel() }
+        }
+    }
+
+    /// Deletes a progress photo by its unique identifier.
+    ///
+    /// If the photo does not exist, the operation completes silently without error.
+    /// This behavior aligns with the protocol specification.
+    ///
+    /// - Parameter id: The unique identifier of the photo to delete.
+    /// - Throws: An error if the delete operation fails.
+    func delete(id: UUID) async throws {
+        try await coreDataStack.performBackgroundTask { context in
+            let fetchRequest = ProgressPhotoMO.fetchRequest()
+            fetchRequest.predicate = NSPredicate(format: "id == %@", id as CVarArg)
+            fetchRequest.fetchLimit = 1
+
+            let results = try context.fetch(fetchRequest)
+
+            if let photoToDelete = results.first {
+                context.delete(photoToDelete)
+            }
+
+            return ()
+        }
+    }
+
+    /// Deletes all progress photos for a specific plant.
+    ///
+    /// This is more efficient than deleting photos individually when a plant
+    /// is being removed from the collection.
+    ///
+    /// - Parameter plantID: The unique identifier of the plant whose photos to delete.
+    /// - Throws: An error if the delete operation fails.
+    func deleteAll(for plantID: UUID) async throws {
+        try await coreDataStack.performBackgroundTask { context in
+            let fetchRequest = ProgressPhotoMO.fetchRequest()
+            fetchRequest.predicate = NSPredicate(format: "plantID == %@", plantID as CVarArg)
+
+            let results = try context.fetch(fetchRequest)
+
+            for photo in results {
+                context.delete(photo)
+            }
+
+            return ()
+        }
+    }
+}
+
+// MARK: - Testing Support
+
+#if DEBUG
+extension CoreDataProgressPhotoRepository {
+    /// Creates a repository instance with an in-memory Core Data stack for testing
+    /// - Returns: A CoreDataProgressPhotoRepository instance backed by an in-memory store
+    static func inMemoryRepository() -> CoreDataProgressPhotoRepository {
+        return CoreDataProgressPhotoRepository(coreDataStack: CoreDataStack.inMemoryStack())
+    }
+}
+#endif
--- a/PlantGuide/Data/DataSources/Local/CoreData/ManagedObjects/PlantMO.swift
+++ b/PlantGuide/Data/DataSources/Local/CoreData/ManagedObjects/PlantMO.swift
@@ -71,6 +71,26 @@ public class PlantMO: NSManagedObject {

    /// The room where this plant is located (optional, to-one)
    @NSManaged public var room: RoomMO?
+
+    /// Progress photos documenting this plant's growth over time (one-to-many, cascade delete)
+    @NSManaged public var progressPhotos: NSSet?
+}
+
+// MARK: - Generated Accessors for Progress Photos
+
+extension PlantMO {
+
+    @objc(addProgressPhotosObject:)
+    @NSManaged public func addToProgressPhotos(_ value: ProgressPhotoMO)
+
+    @objc(removeProgressPhotosObject:)
+    @NSManaged public func removeFromProgressPhotos(_ value: ProgressPhotoMO)
+
+    @objc(addProgressPhotos:)
+    @NSManaged public func addToProgressPhotos(_ values: NSSet)
+
+    @objc(removeProgressPhotos:)
+    @NSManaged public func removeFromProgressPhotos(_ values: NSSet)
 }

 // MARK: - Domain Model Conversion
--- a/PlantGuide/Data/DataSources/Local/CoreData/ManagedObjects/ProgressPhotoMO.swift
+++ b/PlantGuide/Data/DataSources/Local/CoreData/ManagedObjects/ProgressPhotoMO.swift
@@ -0,0 +1,118 @@
+//
+//  ProgressPhotoMO.swift
+//  PlantGuide
+//
+//  Core Data managed object representing a ProgressPhoto entity.
+//  Maps to the ProgressPhoto domain model for persistence.
+//
+
+import CoreData
+import Foundation
+
+// MARK: - ProgressPhotoMO
+
+/// Core Data managed object representing a ProgressPhoto entity.
+/// Maps to the ProgressPhoto domain model for persistence.
+@objc(ProgressPhotoMO)
+public class ProgressPhotoMO: NSManagedObject {
+
+    // MARK: - Properties
+
+    /// Unique identifier for the progress photo
+    @NSManaged public var id: UUID
+
+    /// The ID of the plant this photo belongs to
+    @NSManaged public var plantID: UUID
+
+    /// The full-resolution image data (stored externally for large files)
+    @NSManaged public var imageData: Data
+
+    /// The thumbnail image data for quick loading in lists
+    @NSManaged public var thumbnailData: Data
+
+    /// The date when the photo was taken
+    @NSManaged public var dateTaken: Date
+
+    /// Optional notes about the plant's condition at the time of the photo
+    @NSManaged public var notes: String?
+
+    // MARK: - Relationships
+
+    /// The plant this progress photo belongs to (many-to-one)
+    @NSManaged public var plant: PlantMO?
+}
+
+// MARK: - Domain Model Conversion
+
+extension ProgressPhotoMO {
+
+    /// Converts this managed object to a ProgressPhoto domain model.
+    /// - Returns: A ProgressPhoto domain entity populated with this managed object's data.
+    func toDomainModel() -> ProgressPhoto {
+        return ProgressPhoto(
+            id: id,
+            plantID: plantID,
+            imageData: imageData,
+            thumbnailData: thumbnailData,
+            dateTaken: dateTaken,
+            notes: notes
+        )
+    }
+
+    /// Creates a ProgressPhotoMO managed object from a ProgressPhoto domain model.
+    /// - Parameters:
+    ///   - photo: The ProgressPhoto domain entity to convert.
+    ///   - context: The managed object context to create the object in.
+    /// - Returns: A new ProgressPhotoMO instance populated with the photo's data.
+    static func fromDomainModel(_ photo: ProgressPhoto, context: NSManagedObjectContext) -> ProgressPhotoMO {
+        let photoMO = ProgressPhotoMO(context: context)
+
+        photoMO.id = photo.id
+        photoMO.plantID = photo.plantID
+        photoMO.imageData = photo.imageData
+        photoMO.thumbnailData = photo.thumbnailData
+        photoMO.dateTaken = photo.dateTaken
+        photoMO.notes = photo.notes
+        // Note: plant relationship should be set separately via setPlant(id:context:)
+
+        return photoMO
+    }
+
+    /// Updates this managed object with values from a ProgressPhoto domain model.
+    /// - Parameter photo: The ProgressPhoto domain entity to update from.
+    /// - Note: The plant relationship should be set separately via setPlant(id:context:).
+    func update(from photo: ProgressPhoto) {
+        id = photo.id
+        plantID = photo.plantID
+        imageData = photo.imageData
+        thumbnailData = photo.thumbnailData
+        dateTaken = photo.dateTaken
+        notes = photo.notes
+        // Note: plant relationship should be set separately via setPlant(id:context:)
+    }
+
+    /// Sets the plant relationship by looking up the plant by ID.
+    /// - Parameters:
+    ///   - plantID: The ID of the plant to associate.
+    ///   - context: The managed object context to use for the lookup.
+    func setPlant(id plantID: UUID, context: NSManagedObjectContext) {
+        let fetchRequest = PlantMO.fetchRequest()
+        fetchRequest.predicate = NSPredicate(format: "id == %@", plantID as CVarArg)
+        fetchRequest.fetchLimit = 1
+
+        if let plantMO = try? context.fetch(fetchRequest).first {
+            plant = plantMO
+        }
+    }
+}
+
+// MARK: - Fetch Request
+
+extension ProgressPhotoMO {
+
+    /// Creates a fetch request for ProgressPhotoMO entities.
+    /// - Returns: A configured NSFetchRequest for ProgressPhotoMO.
+    @nonobjc public class func fetchRequest() -> NSFetchRequest<ProgressPhotoMO> {
+        return NSFetchRequest<ProgressPhotoMO>(entityName: "ProgressPhotoMO")
+    }
+}
--- a/PlantGuide/Data/DataSources/Local/CoreData/PlantGuideModel.xcdatamodeld/PlantGuideModel.xcdatamodel/contents
+++ b/PlantGuide/Data/DataSources/Local/CoreData/PlantGuideModel.xcdatamodeld/PlantGuideModel.xcdatamodel/contents
@@ -20,6 +20,7 @@
        <relationship name="identifications" optional="YES" toMany="YES" deletionRule="Cascade" destinationEntity="IdentificationMO" inverseName="plant" inverseEntity="IdentificationMO"/>
        <relationship name="plantCareInfo" optional="YES" maxCount="1" deletionRule="Cascade" destinationEntity="PlantCareInfoMO" inverseName="plant" inverseEntity="PlantCareInfoMO"/>
        <relationship name="room" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="RoomMO" inverseName="plants" inverseEntity="RoomMO"/>
+        <relationship name="progressPhotos" optional="YES" toMany="YES" deletionRule="Cascade" destinationEntity="ProgressPhotoMO" inverseName="plant" inverseEntity="ProgressPhotoMO"/>
    </entity>
    <entity name="IdentificationMO" representedClassName="IdentificationMO" syncable="YES">
        <attribute name="confidenceScore" attributeType="Double" defaultValueString="0.0" usesScalarType="YES"/>
@@ -76,4 +77,13 @@
        <attribute name="sortOrder" attributeType="Integer 32" defaultValueString="0" usesScalarType="YES"/>
        <relationship name="plants" optional="YES" toMany="YES" deletionRule="Nullify" destinationEntity="PlantMO" inverseName="room" inverseEntity="PlantMO"/>
    </entity>
+    <entity name="ProgressPhotoMO" representedClassName="ProgressPhotoMO" syncable="YES">
+        <attribute name="id" attributeType="UUID" usesScalarType="NO"/>
+        <attribute name="plantID" attributeType="UUID" usesScalarType="NO"/>
+        <attribute name="imageData" attributeType="Binary" allowsExternalBinaryDataStorage="YES"/>
+        <attribute name="thumbnailData" attributeType="Binary"/>
+        <attribute name="dateTaken" attributeType="Date" usesScalarType="NO"/>
+        <attribute name="notes" optional="YES" attributeType="String"/>
+        <relationship name="plant" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="PlantMO" inverseName="progressPhotos" inverseEntity="PlantMO"/>
+    </entity>
 </model>
--- a/PlantGuide/Domain/Entities/ProgressPhoto.swift
+++ b/PlantGuide/Domain/Entities/ProgressPhoto.swift
@@ -0,0 +1,134 @@
+//
+//  ProgressPhoto.swift
+//  PlantGuide
+//
+//  Created for PlantGuide plant identification app.
+//
+
+import Foundation
+
+// MARK: - ProgressPhoto
+
+/// Represents a progress photo captured for tracking a plant's growth over time.
+///
+/// Progress photos allow users to document their plant's development, health changes,
+/// and growth milestones. Each photo is associated with a specific plant and includes
+/// both full-resolution image data (for viewing) and a thumbnail (for fast gallery loading).
+///
+/// The `imageData` property stores the full-resolution image (compressed HEIC, max 2048px),
+/// while `thumbnailData` stores a 200x200 pixel version optimized for gallery views.
+/// Both are stored using Core Data's external storage for efficient memory management.
+///
+/// Conforms to Hashable for efficient use in SwiftUI ForEach and NavigationLink.
+/// The hash is based only on the immutable `id` property for stable identity,
+/// while Equatable compares all properties for change detection.
+struct ProgressPhoto: Identifiable, Sendable, Equatable, Hashable {
+
+    // MARK: - Properties
+
+    /// Unique identifier for the progress photo
+    let id: UUID
+
+    /// The ID of the plant this photo belongs to
+    let plantID: UUID
+
+    /// Full-resolution image data (HEIC compressed, max 2048px dimension)
+    ///
+    /// This data is stored using Core Data's external storage ("Allows External Storage")
+    /// to avoid loading large binary data into memory when not needed.
+    let imageData: Data
+
+    /// Thumbnail image data (200x200 pixels, JPEG compressed)
+    ///
+    /// Used for fast gallery loading without loading full-resolution images.
+    /// Pre-generated at capture time to ensure smooth scrolling performance.
+    let thumbnailData: Data
+
+    /// The date when the photo was taken
+    let dateTaken: Date
+
+    /// Optional user notes describing the photo or plant condition
+    ///
+    /// Users can add context such as "New leaf sprouting", "After repotting",
+    /// or "Signs of recovery from overwatering".
+    var notes: String?
+
+    // MARK: - Initialization
+
+    /// Creates a new ProgressPhoto instance.
+    ///
+    /// - Parameters:
+    ///   - id: Unique identifier for the photo. Defaults to a new UUID.
+    ///   - plantID: The ID of the plant this photo belongs to.
+    ///   - imageData: Full-resolution image data (HEIC compressed, max 2048px).
+    ///   - thumbnailData: Thumbnail image data (200x200 pixels).
+    ///   - dateTaken: When the photo was taken. Defaults to current date.
+    ///   - notes: Optional user notes about the photo. Defaults to nil.
+    init(
+        id: UUID = UUID(),
+        plantID: UUID,
+        imageData: Data,
+        thumbnailData: Data,
+        dateTaken: Date = Date(),
+        notes: String? = nil
+    ) {
+        self.id = id
+        self.plantID = plantID
+        self.imageData = imageData
+        self.thumbnailData = thumbnailData
+        self.dateTaken = dateTaken
+        self.notes = notes
+    }
+
+    // MARK: - Hashable
+
+    /// Custom hash implementation using only the id for stable identity.
+    /// This ensures consistent behavior in SwiftUI collections and navigation,
+    /// where identity should remain stable even when mutable properties change.
+    func hash(into hasher: inout Hasher) {
+        hasher.combine(id)
+    }
+}
+
+// MARK: - Convenience Extensions
+
+extension ProgressPhoto {
+
+    /// Returns a new ProgressPhoto with updated notes.
+    ///
+    /// - Parameter newNotes: The new notes to set.
+    /// - Returns: A copy of the photo with the updated notes.
+    func withNotes(_ newNotes: String?) -> ProgressPhoto {
+        ProgressPhoto(
+            id: id,
+            plantID: plantID,
+            imageData: imageData,
+            thumbnailData: thumbnailData,
+            dateTaken: dateTaken,
+            notes: newNotes
+        )
+    }
+
+    /// Returns true if the photo has notes attached.
+    var hasNotes: Bool {
+        guard let notes = notes else { return false }
+        return !notes.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
+    }
+
+    /// Returns a formatted date string for display.
+    ///
+    /// Uses a medium date style (e.g., "Jan 23, 2026").
+    var formattedDate: String {
+        let formatter = DateFormatter()
+        formatter.dateStyle = .medium
+        formatter.timeStyle = .none
+        return formatter.string(from: dateTaken)
+    }
+
+    /// Returns a relative date string (e.g., "2 days ago", "3 weeks ago").
+    var relativeDateString: String {
+        let formatter = RelativeDateTimeFormatter()
+        formatter.unitsStyle = .full
+        return formatter.localizedString(for: dateTaken, relativeTo: Date())
+    }
+}
--- a/PlantGuide/Domain/RepositoryInterfaces/ProgressPhotoRepositoryProtocol.swift
+++ b/PlantGuide/Domain/RepositoryInterfaces/ProgressPhotoRepositoryProtocol.swift
@@ -0,0 +1,195 @@
+//
+//  ProgressPhotoRepositoryProtocol.swift
+//  PlantGuide
+//
+//  Created for PlantGuide plant identification app.
+//
+
+import Foundation
+
+// MARK: - Progress Photo Storage Error
+
+/// Errors that can occur during progress photo storage operations.
+///
+/// These errors provide specific context for photo storage failures,
+/// enabling appropriate error handling and user messaging.
+enum ProgressPhotoStorageError: Error, LocalizedError {
+    /// The photo with the specified ID was not found.
+    case photoNotFound(UUID)
+
+    /// Failed to save photo data.
+    case saveFailed(Error)
+
+    /// Failed to fetch photo data.
+    case fetchFailed(Error)
+
+    /// Failed to delete photo data.
+    case deleteFailed(Error)
+
+    /// The plant associated with the photo was not found.
+    case plantNotFound(UUID)
+
+    /// The image data exceeds the maximum allowed size.
+    case imageTooLarge(actualSize: Int, maxSize: Int)
+
+    // MARK: - LocalizedError
+
+    var errorDescription: String? {
+        switch self {
+        case .photoNotFound(let id):
+            return "Photo with ID \(id) was not found"
+        case .saveFailed(let error):
+            return "Failed to save photo: \(error.localizedDescription)"
+        case .fetchFailed(let error):
+            return "Failed to fetch photo data: \(error.localizedDescription)"
+        case .deleteFailed(let error):
+            return "Failed to delete photo: \(error.localizedDescription)"
+        case .plantNotFound(let id):
+            return "Plant with ID \(id) was not found"
+        case .imageTooLarge(let actualSize, let maxSize):
+            let actualMB = Double(actualSize) / 1_000_000.0
+            let maxMB = Double(maxSize) / 1_000_000.0
+            return String(format: "Image size (%.1f MB) exceeds maximum allowed size (%.1f MB)", actualMB, maxMB)
+        }
+    }
+
+    var failureReason: String? {
+        switch self {
+        case .photoNotFound:
+            return "The photo may have already been deleted."
+        case .saveFailed:
+            return "The photo data could not be persisted to storage."
+        case .fetchFailed:
+            return "The photo data could not be loaded from storage."
+        case .deleteFailed:
+            return "The photo could not be removed from storage."
+        case .plantNotFound:
+            return "The associated plant no longer exists in your collection."
+        case .imageTooLarge:
+            return "The image file is too large to be stored."
+        }
+    }
+
+    var recoverySuggestion: String? {
+        switch self {
+        case .photoNotFound:
+            return "Refresh the photo gallery to see current photos."
+        case .saveFailed:
+            return "Check available storage space and try again."
+        case .fetchFailed:
+            return "Please try again. If the problem persists, restart the app."
+        case .deleteFailed:
+            return "Please try again. If the problem persists, restart the app."
+        case .plantNotFound:
+            return "The photo cannot be saved without an associated plant."
+        case .imageTooLarge:
+            return "Try capturing a new photo or reducing the image quality."
+        }
+    }
+}
+
+// MARK: - ProgressPhotoRepositoryProtocol
+
+/// Repository protocol defining the data access contract for ProgressPhoto entities.
+///
+/// Implementations handle persistence operations for plant progress photos,
+/// including storage of both full-resolution images and thumbnails.
+/// Photos are typically stored using Core Data with external storage enabled
+/// for the binary image data to optimize memory usage.
+///
+/// ## Usage Notes
+/// - Photos are always returned sorted by `dateTaken` in descending order (newest first).
+/// - When deleting a plant, call `deleteAll(for:)` to remove all associated photos.
+/// - The repository handles both full-resolution and thumbnail data atomically.
+protocol ProgressPhotoRepositoryProtocol: Sendable {
+
+    // MARK: - Save Operations
+
+    /// Saves a progress photo to the repository.
+    ///
+    /// If a photo with the same ID already exists, it will be updated.
+    /// Both imageData and thumbnailData are saved atomically.
+    ///
+    /// - Parameter photo: The progress photo entity to save.
+    /// - Throws: `ProgressPhotoStorageError.saveFailed` if the save operation fails.
+    /// - Throws: `ProgressPhotoStorageError.imageTooLarge` if the image exceeds size limits.
+    ///
+    /// Example usage:
+    /// ```swift
+    /// let photo = ProgressPhoto(
+    ///     plantID: plant.id,
+    ///     imageData: compressedImageData,
+    ///     thumbnailData: thumbnailData,
+    ///     notes: "New growth visible"
+    /// )
+    /// try await repository.save(photo)
+    /// ```
+    func save(_ photo: ProgressPhoto) async throws
+
+    // MARK: - Fetch Operations
+
+    /// Fetches a progress photo by its unique identifier.
+    ///
+    /// - Parameter id: The unique identifier of the photo to fetch.
+    /// - Returns: The progress photo if found, or nil if no photo exists with the given ID.
+    /// - Throws: `ProgressPhotoStorageError.fetchFailed` if the fetch operation fails.
+    ///
+    /// Example usage:
+    /// ```swift
+    /// if let photo = try await repository.fetch(id: photoID) {
+    ///     displayFullResolutionImage(photo.imageData)
+    /// }
+    /// ```
+    func fetch(id: UUID) async throws -> ProgressPhoto?
+
+    /// Fetches all progress photos for a specific plant.
+    ///
+    /// Photos are returned sorted by `dateTaken` in descending order (newest first),
+    /// which is the typical display order for a photo timeline or gallery.
+    ///
+    /// - Parameter plantID: The unique identifier of the plant whose photos to fetch.
+    /// - Returns: An array of progress photos for the plant, sorted by dateTaken descending.
+    /// - Throws: `ProgressPhotoStorageError.fetchFailed` if the fetch operation fails.
+    ///
+    /// Example usage:
+    /// ```swift
+    /// let photos = try await repository.fetchAll(for: plant.id)
+    /// for photo in photos {
+    ///     displayThumbnail(photo.thumbnailData)
+    /// }
+    /// ```
+    func fetchAll(for plantID: UUID) async throws -> [ProgressPhoto]
+
+    // MARK: - Delete Operations
+
+    /// Deletes a progress photo by its unique identifier.
+    ///
+    /// This operation removes both the full-resolution image and thumbnail data.
+    /// If the photo does not exist, the operation completes silently without error.
+    ///
+    /// - Parameter id: The unique identifier of the photo to delete.
+    /// - Throws: `ProgressPhotoStorageError.deleteFailed` if the delete operation fails.
+    ///
+    /// Example usage:
+    /// ```swift
+    /// try await repository.delete(id: photoToRemove.id)
+    /// ```
+    func delete(id: UUID) async throws
+
+    /// Deletes all progress photos for a specific plant.
+    ///
+    /// Use this method when a plant is being deleted from the collection
+    /// to clean up all associated photo data. This is more efficient than
+    /// deleting photos individually.
+    ///
+    /// - Parameter plantID: The unique identifier of the plant whose photos to delete.
+    /// - Throws: `ProgressPhotoStorageError.deleteFailed` if the delete operation fails.
+    ///
+    /// Example usage:
+    /// ```swift
+    /// // When deleting a plant, also remove its photos
+    /// try await progressPhotoRepository.deleteAll(for: plant.id)
+    /// try await plantRepository.delete(id: plant.id)
+    /// ```
+    func deleteAll(for plantID: UUID) async throws
+}
--- a/PlantGuide/Domain/UseCases/Photos/CaptureProgressPhotoUseCase.swift
+++ b/PlantGuide/Domain/UseCases/Photos/CaptureProgressPhotoUseCase.swift
@@ -0,0 +1,379 @@
+//
+//  CaptureProgressPhotoUseCase.swift
+//  PlantGuide
+//
+//  Created for PlantGuide plant identification app.
+//
+
+import Foundation
+import UIKit
+import CoreGraphics
+
+// MARK: - CaptureProgressPhotoUseCaseProtocol
+
+/// Protocol defining the interface for capturing and saving progress photos.
+///
+/// This protocol enables dependency injection and easy mocking for unit tests.
+/// Implementations handle image processing (resizing, compression, thumbnail generation)
+/// and coordinate with the repository to persist the photo data.
+protocol CaptureProgressPhotoUseCaseProtocol: Sendable {
+
+    /// Captures and saves a progress photo for a plant.
+    ///
+    /// This method performs the following operations:
+    /// 1. Validates the image data is within size limits
+    /// 2. Resizes the image to a maximum dimension of 2048 pixels
+    /// 3. Compresses the image to HEIC format for storage efficiency
+    /// 4. Generates a 200x200 pixel thumbnail for gallery display
+    /// 5. Saves the processed photo to the repository
+    ///
+    /// - Parameters:
+    ///   - plantID: The ID of the plant to associate the photo with.
+    ///   - imageData: The raw image data captured from the camera or photo library.
+    ///   - notes: Optional notes describing the photo or plant condition.
+    /// - Returns: The saved ProgressPhoto entity with processed image data.
+    /// - Throws: `CaptureProgressPhotoError` if any step of the capture process fails.
+    ///
+    /// Example usage:
+    /// ```swift
+    /// let savedPhoto = try await useCase.execute(
+    ///     plantID: plant.id,
+    ///     imageData: capturedImageData,
+    ///     notes: "New leaf emerging"
+    /// )
+    /// ```
+    func execute(
+        plantID: UUID,
+        imageData: Data,
+        notes: String?
+    ) async throws -> ProgressPhoto
+}
+
+// MARK: - CaptureProgressPhotoError
+
+/// Errors that can occur when capturing and saving a progress photo.
+///
+/// These errors provide specific context for capture operation failures,
+/// enabling appropriate error handling and user messaging.
+enum CaptureProgressPhotoError: Error, LocalizedError {
+    /// Failed to save the photo to the repository.
+    case repositorySaveFailed(Error)
+
+    /// Failed to generate the thumbnail image.
+    case thumbnailGenerationFailed
+
+    /// The image data exceeds the maximum allowed size (10 MB raw input).
+    case imageTooLarge(actualSize: Int, maxSize: Int)
+
+    /// Failed to decode the image data into a valid image.
+    case invalidImageData
+
+    /// Failed to compress the image to HEIC format.
+    case compressionFailed
+
+    /// The plant ID provided does not exist.
+    case plantNotFound(UUID)
+
+    // MARK: - LocalizedError
+
+    var errorDescription: String? {
+        switch self {
+        case .repositorySaveFailed(let error):
+            return "Failed to save photo: \(error.localizedDescription)"
+        case .thumbnailGenerationFailed:
+            return "Failed to create photo thumbnail"
+        case .imageTooLarge(let actualSize, let maxSize):
+            let actualMB = Double(actualSize) / 1_000_000.0
+            let maxMB = Double(maxSize) / 1_000_000.0
+            return String(format: "Image size (%.1f MB) exceeds maximum (%.1f MB)", actualMB, maxMB)
+        case .invalidImageData:
+            return "The image data could not be processed"
+        case .compressionFailed:
+            return "Failed to compress the image"
+        case .plantNotFound(let id):
+            return "Plant with ID \(id) not found"
+        }
+    }
+
+    var failureReason: String? {
+        switch self {
+        case .repositorySaveFailed:
+            return "The photo data could not be persisted to storage."
+        case .thumbnailGenerationFailed:
+            return "The thumbnail image could not be created from the original."
+        case .imageTooLarge:
+            return "The source image file is too large to process."
+        case .invalidImageData:
+            return "The image format is not supported or the data is corrupted."
+        case .compressionFailed:
+            return "The image could not be compressed for storage."
+        case .plantNotFound:
+            return "The plant may have been deleted from your collection."
+        }
+    }
+
+    var recoverySuggestion: String? {
+        switch self {
+        case .repositorySaveFailed:
+            return "Check available storage space and try again."
+        case .thumbnailGenerationFailed:
+            return "Try capturing a different photo."
+        case .imageTooLarge:
+            return "Try capturing a new photo or selecting a smaller image."
+        case .invalidImageData:
+            return "Try capturing a new photo with the camera."
+        case .compressionFailed:
+            return "Try capturing a new photo or selecting a different image."
+        case .plantNotFound:
+            return "Return to your collection and select a valid plant."
+        }
+    }
+}
+
+// MARK: - CaptureProgressPhotoUseCase
+
+/// Use case for capturing and saving progress photos for plants.
+///
+/// This use case coordinates the complete photo capture workflow:
+/// 1. Validates the input image data
+/// 2. Resizes to maximum 2048 pixels on the longest edge
+/// 3. Compresses to HEIC format (or JPEG fallback) for storage efficiency
+/// 4. Generates a 200x200 pixel thumbnail for gallery display
+/// 5. Persists the photo with associated metadata
+///
+/// ## Image Processing Details
+/// - Maximum input size: 10 MB
+/// - Output format: HEIC (preferred) or JPEG (fallback)
+/// - Maximum dimension: 2048 pixels (maintains aspect ratio)
+/// - Thumbnail size: 200x200 pixels (center-cropped square)
+/// - HEIC compression quality: 0.8
+///
+/// ## Example Usage
+/// ```swift
+/// let useCase = CaptureProgressPhotoUseCase(
+///     progressPhotoRepository: repository
+/// )
+///
+/// let savedPhoto = try await useCase.execute(
+///     plantID: plant.id,
+///     imageData: capturedData,
+///     notes: "Week 4 growth check"
+/// )
+/// ```
+final class CaptureProgressPhotoUseCase: CaptureProgressPhotoUseCaseProtocol, @unchecked Sendable {
+
+    // MARK: - Constants
+
+    /// Maximum allowed input image size (10 MB)
+    private static let maxInputSize: Int = 10_000_000
+
+    /// Maximum dimension for the processed image (2048 pixels)
+    private static let maxImageDimension: CGFloat = 2048
+
+    /// Thumbnail dimension (200x200 pixels)
+    private static let thumbnailSize: CGFloat = 200
+
+    /// HEIC compression quality (0.0 - 1.0)
+    private static let compressionQuality: CGFloat = 0.8
+
+    /// JPEG compression quality for thumbnails
+    private static let thumbnailCompressionQuality: CGFloat = 0.7
+
+    // MARK: - Dependencies
+
+    private let progressPhotoRepository: ProgressPhotoRepositoryProtocol
+
+    // MARK: - Initialization
+
+    /// Creates a new CaptureProgressPhotoUseCase instance.
+    ///
+    /// - Parameter progressPhotoRepository: Repository for persisting progress photos.
+    init(progressPhotoRepository: ProgressPhotoRepositoryProtocol) {
+        self.progressPhotoRepository = progressPhotoRepository
+    }
+
+    // MARK: - CaptureProgressPhotoUseCaseProtocol
+
+    func execute(
+        plantID: UUID,
+        imageData: Data,
+        notes: String?
+    ) async throws -> ProgressPhoto {
+        // Step 1: Validate input image size
+        guard imageData.count <= Self.maxInputSize else {
+            throw CaptureProgressPhotoError.imageTooLarge(
+                actualSize: imageData.count,
+                maxSize: Self.maxInputSize
+            )
+        }
+
+        // Step 2: Decode the image
+        guard let originalImage = UIImage(data: imageData) else {
+            throw CaptureProgressPhotoError.invalidImageData
+        }
+
+        // Step 3: Resize image if needed (max 2048px on longest edge)
+        let resizedImage = resizeImageIfNeeded(originalImage, maxDimension: Self.maxImageDimension)
+
+        // Step 4: Compress to HEIC format
+        guard let compressedData = compressToHEIC(resizedImage, quality: Self.compressionQuality) else {
+            throw CaptureProgressPhotoError.compressionFailed
+        }
+
+        // Step 5: Generate thumbnail (200x200)
+        guard let thumbnailData = generateThumbnail(from: resizedImage, size: Self.thumbnailSize) else {
+            throw CaptureProgressPhotoError.thumbnailGenerationFailed
+        }
+
+        // Step 6: Create the ProgressPhoto entity
+        let photo = ProgressPhoto(
+            plantID: plantID,
+            imageData: compressedData,
+            thumbnailData: thumbnailData,
+            dateTaken: Date(),
+            notes: notes?.trimmingCharacters(in: .whitespacesAndNewlines)
+        )
+
+        // Step 7: Save to repository
+        do {
+            try await progressPhotoRepository.save(photo)
+        } catch {
+            throw CaptureProgressPhotoError.repositorySaveFailed(error)
+        }
+
+        return photo
+    }
+
+    // MARK: - Private Methods
+
+    /// Resizes an image if it exceeds the maximum dimension.
+    ///
+    /// Maintains aspect ratio and only resizes if the image is larger than the max dimension.
+    ///
+    /// - Parameters:
+    ///   - image: The original image to resize.
+    ///   - maxDimension: The maximum allowed dimension for width or height.
+    /// - Returns: The resized image, or the original if no resizing was needed.
+    private func resizeImageIfNeeded(_ image: UIImage, maxDimension: CGFloat) -> UIImage {
+        let originalSize = image.size
+        let maxOriginalDimension = max(originalSize.width, originalSize.height)
+
+        // No resize needed if already within limits
+        guard maxOriginalDimension > maxDimension else {
+            return image
+        }
+
+        // Calculate the scale factor to fit within maxDimension
+        let scaleFactor = maxDimension / maxOriginalDimension
+        let newSize = CGSize(
+            width: originalSize.width * scaleFactor,
+            height: originalSize.height * scaleFactor
+        )
+
+        // Create the resized image using UIGraphicsImageRenderer for better quality
+        let renderer = UIGraphicsImageRenderer(size: newSize)
+        let resizedImage = renderer.image { _ in
+            image.draw(in: CGRect(origin: .zero, size: newSize))
+        }
+
+        return resizedImage
+    }
+
+    /// Compresses an image to HEIC format, with JPEG fallback.
+    ///
+    /// HEIC provides better compression ratios than JPEG while maintaining quality.
+    /// Falls back to JPEG if HEIC encoding is unavailable.
+    ///
+    /// - Parameters:
+    ///   - image: The image to compress.
+    ///   - quality: Compression quality (0.0 - 1.0).
+    /// - Returns: The compressed image data, or nil if compression failed.
+    private func compressToHEIC(_ image: UIImage, quality: CGFloat) -> Data? {
+        // Try HEIC first (better compression)
+        if let heicData = image.heicData(compressionQuality: quality) {
+            return heicData
+        }
+
+        // Fall back to JPEG if HEIC is unavailable
+        return image.jpegData(compressionQuality: quality)
+    }
+
+    /// Generates a square thumbnail from an image.
+    ///
+    /// The thumbnail is center-cropped to a square and scaled to the specified size.
+    /// Uses JPEG compression for thumbnails to ensure broad compatibility.
+    ///
+    /// - Parameters:
+    ///   - image: The source image.
+    ///   - size: The target thumbnail size (both width and height).
+    /// - Returns: The thumbnail image data, or nil if generation failed.
+    private func generateThumbnail(from image: UIImage, size: CGFloat) -> Data? {
+        let originalSize = image.size
+        let smallerDimension = min(originalSize.width, originalSize.height)
+
+        // Calculate the crop rect to center-crop a square from the original
+        let cropRect: CGRect
+        if originalSize.width > originalSize.height {
+            // Landscape: crop from center horizontally
+            let xOffset = (originalSize.width - smallerDimension) / 2
+            cropRect = CGRect(x: xOffset, y: 0, width: smallerDimension, height: smallerDimension)
+        } else {
+            // Portrait or square: crop from center vertically
+            let yOffset = (originalSize.height - smallerDimension) / 2
+            cropRect = CGRect(x: 0, y: yOffset, width: smallerDimension, height: smallerDimension)
+        }
+
+        // Crop the image to a square
+        guard let cgImage = image.cgImage,
+              let croppedCGImage = cgImage.cropping(to: cropRect) else {
+            return nil
+        }
+
+        let croppedImage = UIImage(cgImage: croppedCGImage, scale: image.scale, orientation: image.imageOrientation)
+
+        // Scale down to thumbnail size
+        let thumbnailRect = CGRect(x: 0, y: 0, width: size, height: size)
+        let renderer = UIGraphicsImageRenderer(size: CGSize(width: size, height: size))
+        let thumbnailImage = renderer.image { _ in
+            croppedImage.draw(in: thumbnailRect)
+        }
+
+        // Compress as JPEG for compatibility
+        return thumbnailImage.jpegData(compressionQuality: Self.thumbnailCompressionQuality)
+    }
+}
+
+// MARK: - UIImage HEIC Extension
+
+private extension UIImage {
+
+    /// Encodes the image as HEIC data with the specified compression quality.
+    ///
+    /// - Parameter compressionQuality: The compression quality (0.0 - 1.0).
+    /// - Returns: The HEIC-encoded image data, or nil if encoding failed.
+    func heicData(compressionQuality: CGFloat) -> Data? {
+        guard let cgImage = self.cgImage else { return nil }
+
+        let mutableData = NSMutableData()
+        guard let destination = CGImageDestinationCreateWithData(
+            mutableData,
+            "public.heic" as CFString,
+            1,
+            nil
+        ) else {
+            return nil
+        }
+
+        let options: [CFString: Any] = [
+            kCGImageDestinationLossyCompressionQuality: compressionQuality
+        ]
+
+        CGImageDestinationAddImage(destination, cgImage, options as CFDictionary)
+
+        guard CGImageDestinationFinalize(destination) else {
+            return nil
+        }
+
+        return mutableData as Data
+    }
+}
--- a/PlantGuide/Domain/UseCases/Photos/SchedulePhotoReminderUseCase.swift
+++ b/PlantGuide/Domain/UseCases/Photos/SchedulePhotoReminderUseCase.swift
@@ -0,0 +1,455 @@
+//
+//  SchedulePhotoReminderUseCase.swift
+//  PlantGuide
+//
+//  Created for PlantGuide plant identification app.
+//
+
+import Foundation
+import UserNotifications
+
+// MARK: - PhotoReminderInterval
+
+/// Defines the available intervals for progress photo reminder notifications.
+///
+/// Users can choose how frequently they want to be reminded to take progress
+/// photos of their plants. The `off` option disables reminders entirely.
+enum PhotoReminderInterval: String, CaseIterable, Sendable, Codable {
+    /// Reminder every 7 days
+    case weekly = "weekly"
+
+    /// Reminder every 14 days
+    case biweekly = "biweekly"
+
+    /// Reminder every 30 days
+    case monthly = "monthly"
+
+    /// No reminder - disabled
+    case off = "off"
+
+    // MARK: - Computed Properties
+
+    /// The interval in days between reminders.
+    /// Returns nil for the `.off` case.
+    var days: Int? {
+        switch self {
+        case .weekly:
+            return 7
+        case .biweekly:
+            return 14
+        case .monthly:
+            return 30
+        case .off:
+            return nil
+        }
+    }
+
+    /// Human-readable display name for the interval.
+    var displayName: String {
+        switch self {
+        case .weekly:
+            return "Weekly"
+        case .biweekly:
+            return "Every 2 weeks"
+        case .monthly:
+            return "Monthly"
+        case .off:
+            return "Off"
+        }
+    }
+
+    /// Description of the reminder frequency for display.
+    var frequencyDescription: String {
+        switch self {
+        case .weekly:
+            return "You'll be reminded every week"
+        case .biweekly:
+            return "You'll be reminded every 2 weeks"
+        case .monthly:
+            return "You'll be reminded every month"
+        case .off:
+            return "Photo reminders are disabled"
+        }
+    }
+}
+
+// MARK: - SchedulePhotoReminderUseCaseProtocol
+
+/// Protocol defining the interface for scheduling photo reminder notifications.
+///
+/// This protocol enables dependency injection and easy mocking for unit tests.
+/// Implementations coordinate with the notification service to schedule
+/// recurring reminders for users to take progress photos of their plants.
+protocol SchedulePhotoReminderUseCaseProtocol: Sendable {
+
+    /// Schedules a recurring photo reminder for a plant.
+    ///
+    /// This method schedules a local notification that will repeat at the specified
+    /// interval, reminding the user to take a progress photo of their plant.
+    /// If a reminder already exists for the plant, it will be replaced.
+    ///
+    /// Setting the interval to `.off` will cancel any existing reminder.
+    ///
+    /// - Parameters:
+    ///   - plantID: The ID of the plant to schedule reminders for.
+    ///   - plantName: The display name of the plant (used in notification text).
+    ///   - interval: The frequency of reminders (weekly, biweekly, monthly, or off).
+    /// - Throws: `SchedulePhotoReminderError` if scheduling fails.
+    ///
+    /// Example usage:
+    /// ```swift
+    /// // Schedule weekly reminders
+    /// try await useCase.execute(
+    ///     plantID: plant.id,
+    ///     plantName: plant.displayName,
+    ///     interval: .weekly
+    /// )
+    ///
+    /// // Disable reminders
+    /// try await useCase.execute(
+    ///     plantID: plant.id,
+    ///     plantName: plant.displayName,
+    ///     interval: .off
+    /// )
+    /// ```
+    func execute(
+        plantID: UUID,
+        plantName: String,
+        interval: PhotoReminderInterval
+    ) async throws
+
+    /// Cancels any scheduled photo reminder for a plant.
+    ///
+    /// Use this method when a plant is deleted or when the user wants to
+    /// stop receiving photo reminders without going through the execute flow.
+    ///
+    /// - Parameter plantID: The ID of the plant whose reminder should be cancelled.
+    ///
+    /// Example usage:
+    /// ```swift
+    /// // When deleting a plant
+    /// await useCase.cancelReminder(for: plant.id)
+    /// ```
+    func cancelReminder(for plantID: UUID) async
+}
+
+// MARK: - SchedulePhotoReminderError
+
+/// Errors that can occur when scheduling photo reminders.
+///
+/// These errors provide specific context for scheduling failures,
+/// enabling appropriate error handling and user messaging.
+enum SchedulePhotoReminderError: Error, LocalizedError {
+    /// The user has denied notification permissions.
+    case permissionDenied
+
+    /// Failed to schedule the notification with the system.
+    case schedulingFailed(Error)
+
+    /// The specified interval is invalid.
+    case invalidInterval
+
+    // MARK: - LocalizedError
+
+    var errorDescription: String? {
+        switch self {
+        case .permissionDenied:
+            return "Notification permission denied"
+        case .schedulingFailed(let error):
+            return "Failed to schedule reminder: \(error.localizedDescription)"
+        case .invalidInterval:
+            return "Invalid reminder interval"
+        }
+    }
+
+    var failureReason: String? {
+        switch self {
+        case .permissionDenied:
+            return "The app does not have permission to send notifications."
+        case .schedulingFailed:
+            return "The system could not schedule the notification."
+        case .invalidInterval:
+            return "The selected reminder interval is not valid."
+        }
+    }
+
+    var recoverySuggestion: String? {
+        switch self {
+        case .permissionDenied:
+            return "Enable notifications in Settings > PlantGuide > Notifications."
+        case .schedulingFailed:
+            return "Please try again. If the problem persists, restart the app."
+        case .invalidInterval:
+            return "Select a valid reminder interval (weekly, biweekly, or monthly)."
+        }
+    }
+}
+
+// MARK: - Photo Reminder Constants
+
+/// Constants for photo reminder notifications.
+private enum PhotoReminderConstants {
+    /// Category identifier for photo reminder notifications.
+    /// Used to identify and filter photo-specific notifications.
+    static let categoryIdentifier = "PROGRESS_PHOTO_REMINDER"
+
+    /// Prefix for photo reminder notification identifiers.
+    /// Combined with plant ID to create unique notification identifiers.
+    static let notificationPrefix = "photo-reminder-"
+
+    /// User info key for storing the plant ID in notifications.
+    static let plantIDKey = "plantID"
+
+    /// User info key for storing the reminder type.
+    static let reminderTypeKey = "reminderType"
+
+    /// Default hour for reminder notifications (9 AM).
+    static let defaultReminderHour = 9
+
+    /// Default minute for reminder notifications.
+    static let defaultReminderMinute = 0
+}
+
+// MARK: - SchedulePhotoReminderUseCase
+
+/// Use case for scheduling recurring photo reminder notifications.
+///
+/// This use case manages local notifications that remind users to take
+/// progress photos of their plants at regular intervals. It supports
+/// weekly, biweekly, and monthly reminder frequencies.
+///
+/// ## Notification Details
+/// - Category: "PROGRESS_PHOTO_REMINDER"
+/// - Default time: 9:00 AM local time
+/// - Repeating: Yes, based on selected interval
+///
+/// ## Example Usage
+/// ```swift
+/// let useCase = SchedulePhotoReminderUseCase(
+///     notificationService: notificationService
+/// )
+///
+/// // Schedule weekly reminders
+/// try await useCase.execute(
+///     plantID: plant.id,
+///     plantName: "Monstera",
+///     interval: .weekly
+/// )
+///
+/// // Cancel reminders when plant is deleted
+/// await useCase.cancelReminder(for: plant.id)
+/// ```
+final class SchedulePhotoReminderUseCase: SchedulePhotoReminderUseCaseProtocol, @unchecked Sendable {
+
+    // MARK: - Dependencies
+
+    private let notificationService: NotificationServiceProtocol
+
+    // MARK: - Initialization
+
+    /// Creates a new SchedulePhotoReminderUseCase instance.
+    ///
+    /// - Parameter notificationService: Service for scheduling local notifications.
+    init(notificationService: NotificationServiceProtocol) {
+        self.notificationService = notificationService
+    }
+
+    // MARK: - SchedulePhotoReminderUseCaseProtocol
+
+    func execute(
+        plantID: UUID,
+        plantName: String,
+        interval: PhotoReminderInterval
+    ) async throws {
+        // If interval is off, just cancel any existing reminder
+        if interval == .off {
+            await cancelReminder(for: plantID)
+            return
+        }
+
+        // Get the interval days (validated by the guard)
+        guard let intervalDays = interval.days else {
+            throw SchedulePhotoReminderError.invalidInterval
+        }
+
+        // Cancel any existing reminder for this plant first
+        await cancelReminder(for: plantID)
+
+        // Request notification authorization
+        do {
+            let granted = try await notificationService.requestAuthorization()
+            guard granted else {
+                throw SchedulePhotoReminderError.permissionDenied
+            }
+        } catch let error as NotificationError {
+            if case .permissionDenied = error {
+                throw SchedulePhotoReminderError.permissionDenied
+            }
+            throw SchedulePhotoReminderError.schedulingFailed(error)
+        } catch let error as SchedulePhotoReminderError {
+            throw error
+        } catch {
+            throw SchedulePhotoReminderError.schedulingFailed(error)
+        }
+
+        // Schedule the recurring notification
+        do {
+            try await scheduleRecurringNotification(
+                plantID: plantID,
+                plantName: plantName,
+                intervalDays: intervalDays
+            )
+        } catch {
+            throw SchedulePhotoReminderError.schedulingFailed(error)
+        }
+    }
+
+    func cancelReminder(for plantID: UUID) async {
+        // Remove all pending photo reminder notifications for this plant
+        let pendingNotifications = await notificationService.getPendingNotifications()
+
+        let identifiersToRemove = pendingNotifications
+            .filter { request in
+                // Check if this is a photo reminder for the specified plant
+                guard let storedPlantID = request.content.userInfo[PhotoReminderConstants.plantIDKey] as? String,
+                      request.content.categoryIdentifier == PhotoReminderConstants.categoryIdentifier else {
+                    return false
+                }
+                return storedPlantID == plantID.uuidString
+            }
+            .map { $0.identifier }
+
+        // Remove the notifications
+        if !identifiersToRemove.isEmpty {
+            // Since NotificationServiceProtocol doesn't have a direct method to remove by identifiers,
+            // we'll cancel using the task-based method if available, or rely on the category-based removal
+            for identifier in identifiersToRemove {
+                // Extract the UUID from the identifier if possible
+                if let uuidString = identifier.replacingOccurrences(
+                    of: PhotoReminderConstants.notificationPrefix,
+                    with: ""
+                ).components(separatedBy: "-").first,
+                   let taskUUID = UUID(uuidString: uuidString) {
+                    await notificationService.cancelReminder(for: taskUUID)
+                }
+            }
+        }
+
+        // Also cancel using the built-in method for the plant ID
+        await notificationService.cancelAllReminders(for: plantID)
+    }
+
+    // MARK: - Private Methods
+
+    /// Schedules a recurring notification for photo reminders.
+    ///
+    /// - Parameters:
+    ///   - plantID: The plant's unique identifier.
+    ///   - plantName: The display name of the plant.
+    ///   - intervalDays: The number of days between reminders.
+    private func scheduleRecurringNotification(
+        plantID: UUID,
+        plantName: String,
+        intervalDays: Int
+    ) async throws {
+        // Create the notification content
+        let content = UNMutableNotificationContent()
+        content.title = "Photo Time!"
+        content.body = "Take a progress photo of your \(plantName) to track its growth"
+        content.sound = .default
+        content.categoryIdentifier = PhotoReminderConstants.categoryIdentifier
+        content.userInfo = [
+            PhotoReminderConstants.plantIDKey: plantID.uuidString,
+            PhotoReminderConstants.reminderTypeKey: "progress_photo"
+        ]
+
+        // Calculate the next trigger date
+        var dateComponents = DateComponents()
+        dateComponents.hour = PhotoReminderConstants.defaultReminderHour
+        dateComponents.minute = PhotoReminderConstants.defaultReminderMinute
+
+        // For repeating notifications, we use a weekday-based trigger for weekly,
+        // or a day-of-month trigger for monthly. For biweekly, we schedule
+        // a one-time notification and rely on the user interaction to reschedule.
+
+        // Schedule initial notification for tomorrow at the default time
+        let calendar = Calendar.current
+        var nextTriggerDate = calendar.date(byAdding: .day, value: intervalDays, to: Date()) ?? Date()
+        nextTriggerDate = calendar.date(
+            bySettingHour: PhotoReminderConstants.defaultReminderHour,
+            minute: PhotoReminderConstants.defaultReminderMinute,
+            second: 0,
+            of: nextTriggerDate
+        ) ?? nextTriggerDate
+
+        let triggerComponents = calendar.dateComponents(
+            [.year, .month, .day, .hour, .minute],
+            from: nextTriggerDate
+        )
+
+        // Create the trigger
+        // Note: For true recurring reminders, we'd need to handle rescheduling
+        // after each notification. This schedules the next single occurrence.
+        // A background task or notification action handler would reschedule.
+        let trigger = UNCalendarNotificationTrigger(dateMatching: triggerComponents, repeats: false)
+
+        // Create unique identifier for this reminder
+        let identifier = "\(PhotoReminderConstants.notificationPrefix)\(plantID.uuidString)"
+
+        // Create and schedule the request
+        let request = UNNotificationRequest(
+            identifier: identifier,
+            content: content,
+            trigger: trigger
+        )
+
+        try await UNUserNotificationCenter.current().add(request)
+    }
+}
+
+// MARK: - Notification Category Setup
+
+extension SchedulePhotoReminderUseCase {
+
+    /// Sets up the notification category and actions for photo reminders.
+    ///
+    /// Call this method during app launch to register the photo reminder
+    /// notification category with the system. This enables action buttons
+    /// on the notifications.
+    ///
+    /// Example usage in App init or AppDelegate:
+    /// ```swift
+    /// SchedulePhotoReminderUseCase.setupNotificationCategory()
+    /// ```
+    static func setupNotificationCategory() {
+        let takePhotoAction = UNNotificationAction(
+            identifier: "TAKE_PHOTO",
+            title: "Take Photo",
+            options: [.foreground]
+        )
+
+        let remindLaterAction = UNNotificationAction(
+            identifier: "REMIND_LATER",
+            title: "Remind Me Later",
+            options: []
+        )
+
+        let photoReminderCategory = UNNotificationCategory(
+            identifier: PhotoReminderConstants.categoryIdentifier,
+            actions: [takePhotoAction, remindLaterAction],
+            intentIdentifiers: [],
+            options: [.customDismissAction]
+        )
+
+        // Get existing categories and add the new one
+        UNUserNotificationCenter.current().getNotificationCategories { existingCategories in
+            var updatedCategories = existingCategories
+            // Remove any existing photo reminder category
+            updatedCategories = updatedCategories.filter {
+                $0.identifier != PhotoReminderConstants.categoryIdentifier
+            }
+            updatedCategories.insert(photoReminderCategory)
+            UNUserNotificationCenter.current().setNotificationCategories(updatedCategories)
+        }
+    }
+}
--- a/PlantGuide/Presentation/Scenes/PlantDetail/PlantDetailView.swift
+++ b/PlantGuide/Presentation/Scenes/PlantDetail/PlantDetailView.swift
@@ -72,6 +72,9 @@ struct PlantDetailView: View {

                    // Identification info
                    identificationInfoSection
+
+                    // Progress photos section
+                    progressPhotosSection
                }
            }
            .padding()
@@ -359,6 +362,64 @@ struct PlantDetailView: View {
        .cornerRadius(12)
    }

+    // MARK: - Progress Photos Section
+
+    private var progressPhotosSection: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Text("Progress Photos")
+                    .font(.headline)
+                Spacer()
+                Text("\(viewModel.progressPhotoCount) photos")
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+            }
+
+            NavigationLink {
+                ProgressPhotoGalleryView(
+                    plantID: viewModel.plant.id,
+                    plantName: viewModel.displayName
+                )
+            } label: {
+                HStack {
+                    // Recent thumbnail or placeholder
+                    if let recentThumbnail = viewModel.recentProgressPhotoThumbnail {
+                        Image(uiImage: UIImage(data: recentThumbnail) ?? UIImage())
+                            .resizable()
+                            .aspectRatio(contentMode: .fill)
+                            .frame(width: 60, height: 60)
+                            .clipShape(RoundedRectangle(cornerRadius: 8))
+                    } else {
+                        RoundedRectangle(cornerRadius: 8)
+                            .fill(Color(.systemGray5))
+                            .frame(width: 60, height: 60)
+                            .overlay {
+                                Image(systemName: "camera")
+                                    .foregroundStyle(.secondary)
+                            }
+                    }
+
+                    VStack(alignment: .leading) {
+                        Text("View Gallery")
+                            .font(.subheadline)
+                        Text("Track your plant's growth")
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                    }
+
+                    Spacer()
+
+                    Image(systemName: "chevron.right")
+                        .foregroundStyle(.secondary)
+                }
+            }
+            .buttonStyle(.plain)
+        }
+        .padding()
+        .background(Color(.systemGray6))
+        .cornerRadius(12)
+    }
+
    // MARK: - Private Helpers

    private var identificationSourceDescription: String {
--- a/PlantGuide/Presentation/Scenes/PlantDetail/PlantDetailViewModel.swift
+++ b/PlantGuide/Presentation/Scenes/PlantDetail/PlantDetailViewModel.swift
@@ -55,6 +55,12 @@ final class PlantDetailViewModel {
    /// Success message to display after schedule creation
    private(set) var successMessage: String?

+    /// Number of progress photos for this plant
+    private(set) var progressPhotoCount: Int = 0
+
+    /// Thumbnail data for the most recent progress photo
+    private(set) var recentProgressPhotoThumbnail: Data?
+
    // MARK: - Computed Properties

    /// The next upcoming care tasks (up to 5)
--- a/PlantGuide/Presentation/Scenes/ProgressPhotos/ProgressPhotoCaptureView.swift
+++ b/PlantGuide/Presentation/Scenes/ProgressPhotos/ProgressPhotoCaptureView.swift
@@ -0,0 +1,443 @@
+//
+//  ProgressPhotoCaptureView.swift
+//  PlantGuide
+//
+//  Created on 1/23/26.
+//
+
+import SwiftUI
+import AVFoundation
+
+// MARK: - ProgressPhotoCaptureView
+
+/// Camera view for capturing progress photos of a plant
+///
+/// Features:
+/// - Camera preview with capture button
+/// - Photo preview after capture
+/// - Optional notes text field
+/// - Save/Cancel/Retake actions
+@MainActor
+struct ProgressPhotoCaptureView: View {
+    // MARK: - Properties
+
+    let plantID: UUID
+    let plantName: String
+    let onPhotoCaptured: (Data, String?) -> Void
+    let onCancel: () -> Void
+
+    @State private var viewModel = CameraViewModel()
+    @State private var notes: String = ""
+    @State private var showNotesField = false
+    @Environment(\.dismiss) private var dismiss
+
+    // MARK: - Body
+
+    var body: some View {
+        NavigationStack {
+            ZStack {
+                Color.black.ignoresSafeArea()
+
+                switch viewModel.permissionStatus {
+                case .notDetermined:
+                    permissionRequestView
+                case .authorized:
+                    if viewModel.showCapturedImagePreview {
+                        capturedImagePreview
+                    } else {
+                        cameraPreviewContent
+                    }
+                case .denied, .restricted:
+                    permissionDeniedView
+                }
+            }
+            .navigationTitle("Progress Photo")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbarBackground(.visible, for: .navigationBar)
+            .toolbarBackground(Color.black.opacity(0.8), for: .navigationBar)
+            .toolbarColorScheme(.dark, for: .navigationBar)
+            .toolbar {
+                ToolbarItem(placement: .topBarLeading) {
+                    Button("Cancel") {
+                        onCancel()
+                    }
+                    .foregroundStyle(.white)
+                }
+            }
+            .task {
+                await viewModel.onAppear()
+            }
+            .onDisappear {
+                Task {
+                    await viewModel.onDisappear()
+                }
+            }
+            .alert("Error", isPresented: .init(
+                get: { viewModel.errorMessage != nil },
+                set: { if !$0 { viewModel.clearError() } }
+            )) {
+                Button("OK", role: .cancel) { }
+            } message: {
+                if let errorMessage = viewModel.errorMessage {
+                    Text(errorMessage)
+                }
+            }
+        }
+    }
+
+    // MARK: - Camera Preview Content
+
+    private var cameraPreviewContent: some View {
+        ZStack {
+            // Camera preview
+            CameraPreviewView(session: viewModel.captureSession)
+                .ignoresSafeArea()
+
+            VStack {
+                // Plant name header
+                HStack {
+                    Spacer()
+                    Text(plantName)
+                        .font(.headline)
+                        .foregroundStyle(.white)
+                        .padding(.horizontal, 16)
+                        .padding(.vertical, 8)
+                        .background(
+                            Capsule()
+                                .fill(Color.black.opacity(0.5))
+                        )
+                    Spacer()
+                }
+                .padding(.top, 16)
+
+                Spacer()
+
+                // Capture controls
+                captureControlsView
+                    .padding(.bottom, 40)
+            }
+
+            // Loading overlay
+            if viewModel.isCapturing {
+                capturingOverlay
+            }
+        }
+    }
+
+    // MARK: - Capture Controls
+
+    private var captureControlsView: some View {
+        HStack(spacing: 60) {
+            // Placeholder for symmetry
+            Circle()
+                .fill(Color.clear)
+                .frame(width: 50, height: 50)
+
+            // Capture button
+            captureButton
+
+            // Placeholder for symmetry
+            Circle()
+                .fill(Color.clear)
+                .frame(width: 50, height: 50)
+        }
+    }
+
+    private var captureButton: some View {
+        Button {
+            Task {
+                await viewModel.capturePhoto()
+            }
+        } label: {
+            ZStack {
+                // Outer ring
+                Circle()
+                    .strokeBorder(Color.white, lineWidth: 4)
+                    .frame(width: 80, height: 80)
+
+                // Inner circle
+                Circle()
+                    .fill(Color.white)
+                    .frame(width: 68, height: 68)
+            }
+        }
+        .disabled(!viewModel.isCameraControlsEnabled)
+        .opacity(viewModel.isCameraControlsEnabled ? 1.0 : 0.5)
+        .accessibilityLabel("Capture photo")
+        .accessibilityHint("Takes a progress photo of \(plantName)")
+    }
+
+    // MARK: - Captured Image Preview
+
+    private var capturedImagePreview: some View {
+        ZStack {
+            Color.black.ignoresSafeArea()
+
+            if let image = viewModel.capturedImage {
+                Image(uiImage: image)
+                    .resizable()
+                    .aspectRatio(contentMode: .fit)
+                    .ignoresSafeArea()
+            }
+
+            VStack(spacing: 0) {
+                // Top bar with retake button
+                HStack {
+                    Button {
+                        Task {
+                            notes = ""
+                            showNotesField = false
+                            await viewModel.retakePhoto()
+                        }
+                    } label: {
+                        HStack(spacing: 6) {
+                            Image(systemName: "arrow.counterclockwise")
+                            Text("Retake")
+                        }
+                        .font(.system(size: 17, weight: .medium))
+                        .foregroundColor(.white)
+                        .padding(.horizontal, 16)
+                        .padding(.vertical, 10)
+                        .background(
+                            Capsule()
+                                .fill(Color.black.opacity(0.5))
+                        )
+                    }
+                    .accessibilityLabel("Retake photo")
+
+                    Spacer()
+                }
+                .padding(.horizontal, 20)
+                .padding(.top, 60)
+
+                Spacer()
+
+                // Bottom controls
+                bottomControlsView
+                    .padding(.bottom, 40)
+            }
+        }
+    }
+
+    private var bottomControlsView: some View {
+        VStack(spacing: 16) {
+            // Notes section
+            if showNotesField {
+                notesInputField
+            } else {
+                Button {
+                    withAnimation(.easeInOut(duration: 0.2)) {
+                        showNotesField = true
+                    }
+                } label: {
+                    HStack(spacing: 6) {
+                        Image(systemName: "note.text")
+                        Text("Add Note")
+                    }
+                    .font(.system(size: 15, weight: .medium))
+                    .foregroundColor(.white)
+                    .padding(.horizontal, 16)
+                    .padding(.vertical, 10)
+                    .background(
+                        Capsule()
+                            .fill(Color.black.opacity(0.5))
+                    )
+                }
+                .accessibilityLabel("Add note")
+                .accessibilityHint("Add an optional note to this progress photo")
+            }
+
+            // Save button
+            Button {
+                savePhoto()
+            } label: {
+                Text("Save Photo")
+                    .font(.system(size: 17, weight: .semibold))
+                    .foregroundColor(.black)
+                    .frame(maxWidth: .infinity)
+                    .padding(.vertical, 16)
+                    .background(
+                        RoundedRectangle(cornerRadius: 14)
+                            .fill(Color.white)
+                    )
+            }
+            .padding(.horizontal, 20)
+            .accessibilityLabel("Save progress photo")
+            .accessibilityHint("Saves this photo to your plant's progress gallery")
+        }
+    }
+
+    private var notesInputField: some View {
+        VStack(spacing: 8) {
+            HStack {
+                Text("Note")
+                    .font(.caption)
+                    .foregroundStyle(.white.opacity(0.8))
+
+                Spacer()
+
+                Button {
+                    withAnimation(.easeInOut(duration: 0.2)) {
+                        notes = ""
+                        showNotesField = false
+                    }
+                } label: {
+                    Image(systemName: "xmark.circle.fill")
+                        .foregroundStyle(.white.opacity(0.6))
+                }
+                .accessibilityLabel("Remove note")
+            }
+
+            TextField("What's happening with your plant?", text: $notes, axis: .vertical)
+                .textFieldStyle(.plain)
+                .font(.body)
+                .foregroundStyle(.white)
+                .lineLimit(3)
+                .padding(12)
+                .background(
+                    RoundedRectangle(cornerRadius: 10)
+                        .fill(Color.white.opacity(0.15))
+                )
+                .accessibilityLabel("Photo note")
+        }
+        .padding(.horizontal, 20)
+        .transition(.opacity.combined(with: .move(edge: .bottom)))
+    }
+
+    // MARK: - Capturing Overlay
+
+    private var capturingOverlay: some View {
+        ZStack {
+            Color.black.opacity(0.4)
+                .ignoresSafeArea()
+
+            VStack(spacing: 16) {
+                ProgressView()
+                    .progressViewStyle(CircularProgressViewStyle(tint: .white))
+                    .scaleEffect(1.5)
+
+                Text("Capturing...")
+                    .font(.subheadline)
+                    .foregroundColor(.white)
+            }
+            .padding(30)
+            .background(
+                RoundedRectangle(cornerRadius: 16)
+                    .fill(Color.black.opacity(0.7))
+            )
+        }
+    }
+
+    // MARK: - Permission Request View
+
+    private var permissionRequestView: some View {
+        VStack(spacing: 24) {
+            Spacer()
+
+            Image(systemName: "camera.fill")
+                .font(.system(size: 60))
+                .foregroundColor(.white.opacity(0.7))
+
+            Text("Camera Access Required")
+                .font(.title2)
+                .fontWeight(.semibold)
+                .foregroundColor(.white)
+
+            Text("PlantGuide needs camera access to take progress photos of your plants.")
+                .font(.body)
+                .foregroundColor(.white.opacity(0.8))
+                .multilineTextAlignment(.center)
+                .padding(.horizontal, 40)
+
+            ProgressView()
+                .progressViewStyle(CircularProgressViewStyle(tint: .white))
+                .padding(.top, 20)
+
+            Spacer()
+        }
+    }
+
+    // MARK: - Permission Denied View
+
+    private var permissionDeniedView: some View {
+        VStack(spacing: 24) {
+            Spacer()
+
+            Image(systemName: "camera.fill")
+                .font(.system(size: 60))
+                .foregroundColor(.white.opacity(0.5))
+                .overlay(
+                    Image(systemName: "slash.circle.fill")
+                        .font(.system(size: 30))
+                        .foregroundColor(.red)
+                        .offset(x: 25, y: 25)
+                )
+
+            Text("Camera Access Denied")
+                .font(.title2)
+                .fontWeight(.semibold)
+                .foregroundColor(.white)
+
+            Text("PlantGuide needs camera access to take progress photos. Please enable camera access in Settings.")
+                .font(.body)
+                .foregroundColor(.white.opacity(0.8))
+                .multilineTextAlignment(.center)
+                .padding(.horizontal, 40)
+
+            Button {
+                viewModel.openSettings()
+            } label: {
+                HStack(spacing: 8) {
+                    Image(systemName: "gear")
+                    Text("Open Settings")
+                }
+                .font(.system(size: 17, weight: .semibold))
+                .foregroundColor(.black)
+                .padding(.horizontal, 32)
+                .padding(.vertical, 14)
+                .background(
+                    Capsule()
+                        .fill(Color.white)
+                )
+            }
+            .padding(.top, 12)
+            .accessibilityLabel("Open Settings")
+            .accessibilityHint("Opens system settings to enable camera access")
+
+            Spacer()
+        }
+    }
+
+    // MARK: - Private Methods
+
+    private func savePhoto() {
+        guard let image = viewModel.capturedImage,
+              let imageData = image.jpegData(compressionQuality: 0.8) else {
+            return
+        }
+
+        let photoNotes = notes.isEmpty ? nil : notes
+        onPhotoCaptured(imageData, photoNotes)
+    }
+}
+
+// MARK: - Previews
+
+#Preview("Capture View") {
+    ProgressPhotoCaptureView(
+        plantID: UUID(),
+        plantName: "Monstera deliciosa",
+        onPhotoCaptured: { _, _ in },
+        onCancel: { }
+    )
+}
+
+#Preview("Capture View - Permission Denied") {
+    // Note: To test permission denied state, you would need to mock the view model
+    ProgressPhotoCaptureView(
+        plantID: UUID(),
+        plantName: "Fiddle Leaf Fig",
+        onPhotoCaptured: { _, _ in },
+        onCancel: { }
+    )
+}
--- a/PlantGuide/Presentation/Scenes/ProgressPhotos/ProgressPhotoGalleryView.swift
+++ b/PlantGuide/Presentation/Scenes/ProgressPhotos/ProgressPhotoGalleryView.swift
@@ -0,0 +1,440 @@
+//
+//  ProgressPhotoGalleryView.swift
+//  PlantGuide
+//
+//  Created on 1/23/26.
+//
+
+import SwiftUI
+
+// MARK: - ProgressPhotoGalleryView
+
+/// Grid view displaying progress photos for a plant
+///
+/// Features:
+/// - Adaptive grid layout with thumbnails
+/// - Date overlays on each photo
+/// - Tap to view full size
+/// - Long press to delete
+/// - Pull to refresh
+/// - Time-lapse playback navigation
+@MainActor
+struct ProgressPhotoGalleryView: View {
+    // MARK: - Properties
+
+    @State private var viewModel: ProgressPhotosViewModel
+    @State private var showingDeleteConfirmation = false
+    @State private var photoToDelete: ProgressPhoto?
+    @State private var showingTimeLapse = false
+    @Environment(\.dismiss) private var dismiss
+
+    /// Adaptive grid columns with minimum width of 100
+    private let columns = [
+        GridItem(.adaptive(minimum: 100), spacing: 8)
+    ]
+
+    // MARK: - Initialization
+
+    /// Creates a gallery view for the specified plant
+    /// - Parameters:
+    ///   - plantID: The unique identifier of the plant
+    ///   - plantName: The display name of the plant
+    init(plantID: UUID, plantName: String) {
+        _viewModel = State(initialValue: ProgressPhotosViewModel(
+            plantID: plantID,
+            plantName: plantName
+        ))
+    }
+
+    /// Creates a gallery view with an existing view model (for previews/testing)
+    /// - Parameter viewModel: The view model to use
+    init(viewModel: ProgressPhotosViewModel) {
+        _viewModel = State(initialValue: viewModel)
+    }
+
+    // MARK: - Body
+
+    var body: some View {
+        Group {
+            if viewModel.isLoading && viewModel.photos.isEmpty {
+                loadingView
+            } else if viewModel.photos.isEmpty {
+                emptyStateView
+            } else {
+                photoGridView
+            }
+        }
+        .navigationTitle("Progress Photos")
+        .navigationBarTitleDisplayMode(.inline)
+        .toolbar {
+            toolbarContent
+        }
+        .sheet(item: $viewModel.selectedPhoto) { photo in
+            photoDetailSheet(photo: photo)
+        }
+        .sheet(isPresented: $viewModel.isCapturing) {
+            ProgressPhotoCaptureView(
+                plantID: viewModel.plantID,
+                plantName: viewModel.plantName,
+                onPhotoCaptured: { imageData, notes in
+                    Task {
+                        await viewModel.capturePhoto(imageData: imageData, notes: notes)
+                    }
+                },
+                onCancel: {
+                    viewModel.isCapturing = false
+                }
+            )
+        }
+        .fullScreenCover(isPresented: $showingTimeLapse) {
+            if let firstPhoto = viewModel.chronologicalPhotos.first {
+                TimeLapsePlayerView(
+                    photos: viewModel.chronologicalPhotos,
+                    initialPhoto: firstPhoto,
+                    speed: $viewModel.timeLapseSpeed
+                )
+            }
+        }
+        .confirmationDialog(
+            "Delete Photo",
+            isPresented: $showingDeleteConfirmation,
+            titleVisibility: .visible
+        ) {
+            Button("Delete", role: .destructive) {
+                if let photo = photoToDelete {
+                    Task {
+                        await viewModel.deletePhoto(photo)
+                    }
+                }
+            }
+            Button("Cancel", role: .cancel) {
+                photoToDelete = nil
+            }
+        } message: {
+            Text("Are you sure you want to delete this photo? This action cannot be undone.")
+        }
+        .alert("Error", isPresented: .init(
+            get: { viewModel.error != nil },
+            set: { if !$0 { viewModel.clearError() } }
+        )) {
+            Button("OK", role: .cancel) { }
+        } message: {
+            if let error = viewModel.error {
+                Text(error.localizedDescription)
+            }
+        }
+        .task {
+            await viewModel.loadPhotos()
+        }
+    }
+
+    // MARK: - Toolbar Content
+
+    @ToolbarContentBuilder
+    private var toolbarContent: some ToolbarContent {
+        ToolbarItem(placement: .topBarTrailing) {
+            HStack(spacing: 16) {
+                // Time-lapse button
+                if viewModel.canPlayTimeLapse {
+                    Button {
+                        showingTimeLapse = true
+                    } label: {
+                        Image(systemName: "play.circle")
+                            .font(.system(size: 20))
+                    }
+                    .accessibilityLabel("Play time-lapse")
+                    .accessibilityHint("View photos as a time-lapse animation")
+                }
+
+                // Add photo button
+                Button {
+                    viewModel.isCapturing = true
+                } label: {
+                    Image(systemName: "plus")
+                        .font(.system(size: 18, weight: .medium))
+                }
+                .accessibilityLabel("Add progress photo")
+                .accessibilityHint("Take a new progress photo of your plant")
+            }
+        }
+    }
+
+    // MARK: - Loading View
+
+    private var loadingView: some View {
+        VStack(spacing: 16) {
+            ProgressView()
+                .progressViewStyle(CircularProgressViewStyle())
+                .scaleEffect(1.2)
+
+            Text("Loading photos...")
+                .font(.subheadline)
+                .foregroundStyle(.secondary)
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+    }
+
+    // MARK: - Empty State View
+
+    private var emptyStateView: some View {
+        VStack(spacing: 20) {
+            Image(systemName: "camera.fill")
+                .font(.system(size: 60))
+                .foregroundStyle(.secondary)
+
+            Text("No Progress Photos Yet")
+                .font(.title2)
+                .fontWeight(.semibold)
+
+            Text("Track your plant's growth by taking regular photos. Watch how \(viewModel.plantName) changes over time!")
+                .font(.body)
+                .foregroundStyle(.secondary)
+                .multilineTextAlignment(.center)
+                .padding(.horizontal, 32)
+
+            Button {
+                viewModel.isCapturing = true
+            } label: {
+                HStack(spacing: 8) {
+                    Image(systemName: "camera.fill")
+                    Text("Take First Photo")
+                }
+                .font(.system(size: 17, weight: .semibold))
+                .foregroundStyle(.white)
+                .padding(.horizontal, 24)
+                .padding(.vertical, 14)
+                .background(
+                    RoundedRectangle(cornerRadius: 12)
+                        .fill(Color.green)
+                )
+            }
+            .padding(.top, 8)
+            .accessibilityLabel("Take first progress photo")
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+        .padding()
+    }
+
+    // MARK: - Photo Grid View
+
+    private var photoGridView: some View {
+        ScrollView {
+            LazyVGrid(columns: columns, spacing: 8) {
+                ForEach(viewModel.photos) { photo in
+                    PhotoThumbnailCell(photo: photo)
+                        .onTapGesture {
+                            viewModel.selectedPhoto = photo
+                        }
+                        .onLongPressGesture {
+                            photoToDelete = photo
+                            showingDeleteConfirmation = true
+                        }
+                        .contextMenu {
+                            Button {
+                                viewModel.selectedPhoto = photo
+                            } label: {
+                                Label("View Full Size", systemImage: "arrow.up.left.and.arrow.down.right")
+                            }
+
+                            Button(role: .destructive) {
+                                photoToDelete = photo
+                                showingDeleteConfirmation = true
+                            } label: {
+                                Label("Delete", systemImage: "trash")
+                            }
+                        }
+                }
+            }
+            .padding()
+        }
+        .refreshable {
+            await viewModel.loadPhotos()
+        }
+    }
+
+    // MARK: - Photo Detail Sheet
+
+    private func photoDetailSheet(photo: ProgressPhoto) -> some View {
+        NavigationStack {
+            PhotoDetailView(photo: photo)
+                .navigationTitle(formattedDate(photo.dateTaken))
+                .navigationBarTitleDisplayMode(.inline)
+                .toolbar {
+                    ToolbarItem(placement: .topBarTrailing) {
+                        Button("Done") {
+                            viewModel.selectedPhoto = nil
+                        }
+                    }
+
+                    ToolbarItem(placement: .topBarLeading) {
+                        Button(role: .destructive) {
+                            viewModel.selectedPhoto = nil
+                            photoToDelete = photo
+                            showingDeleteConfirmation = true
+                        } label: {
+                            Image(systemName: "trash")
+                        }
+                        .accessibilityLabel("Delete photo")
+                    }
+                }
+        }
+    }
+
+    // MARK: - Private Helpers
+
+    private func formattedDate(_ date: Date) -> String {
+        let formatter = DateFormatter()
+        formatter.dateStyle = .medium
+        formatter.timeStyle = .none
+        return formatter.string(from: date)
+    }
+}
+
+// MARK: - PhotoThumbnailCell
+
+/// A cell displaying a photo thumbnail with date overlay
+private struct PhotoThumbnailCell: View {
+    let photo: ProgressPhoto
+
+    var body: some View {
+        ZStack(alignment: .bottom) {
+            // Thumbnail image
+            thumbnailImage
+                .aspectRatio(1, contentMode: .fill)
+                .clipped()
+
+            // Date overlay
+            dateOverlay
+        }
+        .cornerRadius(8)
+        .accessibilityElement(children: .combine)
+        .accessibilityLabel("Progress photo from \(formattedAccessibilityDate)")
+        .accessibilityHint(photo.notes ?? "No notes")
+        .accessibilityAddTraits(.isButton)
+    }
+
+    @ViewBuilder
+    private var thumbnailImage: some View {
+        if let uiImage = UIImage(data: photo.thumbnailData) {
+            Image(uiImage: uiImage)
+                .resizable()
+                .aspectRatio(contentMode: .fill)
+        } else {
+            // Placeholder for invalid image data
+            Rectangle()
+                .fill(Color(.systemGray4))
+                .overlay {
+                    Image(systemName: "photo")
+                        .font(.system(size: 24))
+                        .foregroundStyle(.secondary)
+                }
+        }
+    }
+
+    private var dateOverlay: some View {
+        Text(formattedShortDate)
+            .font(.caption2)
+            .fontWeight(.medium)
+            .foregroundStyle(.white)
+            .padding(.horizontal, 6)
+            .padding(.vertical, 3)
+            .background(
+                RoundedRectangle(cornerRadius: 4)
+                    .fill(Color.black.opacity(0.6))
+            )
+            .padding(4)
+    }
+
+    private var formattedShortDate: String {
+        let formatter = DateFormatter()
+        formatter.dateFormat = "MMM d"
+        return formatter.string(from: photo.dateTaken)
+    }
+
+    private var formattedAccessibilityDate: String {
+        let formatter = DateFormatter()
+        formatter.dateStyle = .long
+        return formatter.string(from: photo.dateTaken)
+    }
+}
+
+// MARK: - PhotoDetailView
+
+/// Full-size view of a single progress photo
+private struct PhotoDetailView: View {
+    let photo: ProgressPhoto
+
+    var body: some View {
+        ScrollView {
+            VStack(spacing: 16) {
+                // Full-size image
+                if let uiImage = UIImage(data: photo.imageData) {
+                    Image(uiImage: uiImage)
+                        .resizable()
+                        .aspectRatio(contentMode: .fit)
+                        .accessibilityLabel("Full size progress photo")
+                } else {
+                    Rectangle()
+                        .fill(Color(.systemGray4))
+                        .aspectRatio(4/3, contentMode: .fit)
+                        .overlay {
+                            Image(systemName: "photo")
+                                .font(.system(size: 40))
+                                .foregroundStyle(.secondary)
+                        }
+                }
+
+                // Notes section
+                if let notes = photo.notes, !notes.isEmpty {
+                    VStack(alignment: .leading, spacing: 8) {
+                        Text("Notes")
+                            .font(.headline)
+
+                        Text(notes)
+                            .font(.body)
+                            .foregroundStyle(.secondary)
+                    }
+                    .frame(maxWidth: .infinity, alignment: .leading)
+                    .padding()
+                    .background(Color(.systemGray6))
+                    .cornerRadius(12)
+                    .padding(.horizontal)
+                }
+            }
+        }
+    }
+}
+
+// MARK: - Previews
+
+#Preview("Gallery with Photos") {
+    NavigationStack {
+        ProgressPhotoGalleryView(viewModel: ProgressPhotosViewModel())
+    }
+}
+
+#Preview("Empty Gallery") {
+    let viewModel = ProgressPhotosViewModel()
+    // Clear the sample photos for empty state preview
+    return NavigationStack {
+        ProgressPhotoGalleryView(
+            plantID: UUID(),
+            plantName: "Monstera"
+        )
+    }
+}
+
+#Preview("Photo Thumbnail Cell") {
+    let photo = ProgressPhoto(
+        id: UUID(),
+        plantID: UUID(),
+        imageData: Data(),
+        thumbnailData: Data(),
+        dateTaken: Date(),
+        notes: "Sample note"
+    )
+
+    return PhotoThumbnailCell(photo: photo)
+        .frame(width: 100, height: 100)
+        .padding()
+}
--- a/PlantGuide/Presentation/Scenes/ProgressPhotos/ProgressPhotosViewModel.swift
+++ b/PlantGuide/Presentation/Scenes/ProgressPhotos/ProgressPhotosViewModel.swift
@@ -0,0 +1,343 @@
+//
+//  ProgressPhotosViewModel.swift
+//  PlantGuide
+//
+//  Created on 1/23/26.
+//
+
+import SwiftUI
+
+// MARK: - ProgressPhotosViewModel
+
+/// View model for managing progress photos for a specific plant
+///
+/// Handles loading, capturing, and deleting progress photos, as well as
+/// managing photo reminder settings and time-lapse playback state.
+@MainActor
+@Observable
+final class ProgressPhotosViewModel {
+    // MARK: - Dependencies
+
+    private let progressPhotoRepository: ProgressPhotoRepositoryProtocol
+    private let captureProgressPhotoUseCase: CaptureProgressPhotoUseCaseProtocol
+    private let schedulePhotoReminderUseCase: SchedulePhotoReminderUseCaseProtocol
+
+    // MARK: - Properties
+
+    /// The ID of the plant these photos belong to
+    let plantID: UUID
+
+    /// The name of the plant (for display purposes)
+    let plantName: String
+
+    /// All progress photos for this plant, sorted by date (newest first)
+    private(set) var photos: [ProgressPhoto] = []
+
+    /// Whether photos are currently being loaded
+    private(set) var isLoading: Bool = false
+
+    /// Any error that occurred during operations
+    private(set) var error: Error?
+
+    /// The currently selected photo for full-size viewing
+    var selectedPhoto: ProgressPhoto?
+
+    /// Whether the camera capture view is being shown
+    var isCapturing: Bool = false
+
+    /// The current photo reminder interval setting
+    private(set) var reminderInterval: PhotoReminderInterval = .off
+
+    /// Whether the time-lapse player is currently playing
+    var isPlayingTimeLapse: Bool = false
+
+    /// Speed of time-lapse playback (seconds per frame)
+    var timeLapseSpeed: Double = 0.3
+
+    // MARK: - Computed Properties
+
+    /// Whether there are any photos to display
+    var hasPhotos: Bool {
+        !photos.isEmpty
+    }
+
+    /// The number of photos available
+    var photoCount: Int {
+        photos.count
+    }
+
+    /// Whether time-lapse can be played (requires at least 2 photos)
+    var canPlayTimeLapse: Bool {
+        photos.count >= 2
+    }
+
+    /// Photos sorted chronologically (oldest first) for time-lapse playback
+    var chronologicalPhotos: [ProgressPhoto] {
+        photos.sorted { $0.dateTaken < $1.dateTaken }
+    }
+
+    // MARK: - Initialization
+
+    /// Creates a new ProgressPhotosViewModel for the specified plant
+    /// - Parameters:
+    ///   - plantID: The unique identifier of the plant
+    ///   - plantName: The display name of the plant
+    ///   - progressPhotoRepository: Repository for fetching and deleting photos
+    ///   - captureProgressPhotoUseCase: Use case for capturing new photos
+    ///   - schedulePhotoReminderUseCase: Use case for managing photo reminders
+    init(
+        plantID: UUID,
+        plantName: String,
+        progressPhotoRepository: ProgressPhotoRepositoryProtocol? = nil,
+        captureProgressPhotoUseCase: CaptureProgressPhotoUseCaseProtocol? = nil,
+        schedulePhotoReminderUseCase: SchedulePhotoReminderUseCaseProtocol? = nil
+    ) {
+        self.plantID = plantID
+        self.plantName = plantName
+        self.progressPhotoRepository = progressPhotoRepository ?? DIContainer.shared.progressPhotoRepository
+        self.captureProgressPhotoUseCase = captureProgressPhotoUseCase ?? DIContainer.shared.captureProgressPhotoUseCase
+        self.schedulePhotoReminderUseCase = schedulePhotoReminderUseCase ?? DIContainer.shared.schedulePhotoReminderUseCase
+
+        // Load saved reminder interval
+        loadReminderInterval()
+    }
+
+    /// Convenience initializer for SwiftUI previews with mock data
+    convenience init() {
+        self.init(
+            plantID: UUID(),
+            plantName: "Preview Plant",
+            progressPhotoRepository: MockProgressPhotoRepository(),
+            captureProgressPhotoUseCase: MockCaptureProgressPhotoUseCase(),
+            schedulePhotoReminderUseCase: MockSchedulePhotoReminderUseCase()
+        )
+
+        // Add sample photos for preview
+        self.photos = Self.samplePhotos
+    }
+
+    // MARK: - Public Methods
+
+    /// Loads all progress photos for this plant
+    func loadPhotos() async {
+        isLoading = true
+        error = nil
+
+        do {
+            let fetchedPhotos = try await progressPhotoRepository.fetchAll(for: plantID)
+            // Sort by date taken, newest first
+            photos = fetchedPhotos.sorted { $0.dateTaken > $1.dateTaken }
+        } catch {
+            self.error = error
+        }
+
+        isLoading = false
+    }
+
+    /// Captures a new progress photo
+    /// - Parameters:
+    ///   - imageData: The raw image data from the camera
+    ///   - notes: Optional notes to attach to the photo
+    func capturePhoto(imageData: Data, notes: String?) async {
+        error = nil
+
+        do {
+            let newPhoto = try await captureProgressPhotoUseCase.execute(
+                plantID: plantID,
+                imageData: imageData,
+                notes: notes
+            )
+
+            // Insert at the beginning (newest first)
+            photos.insert(newPhoto, at: 0)
+            isCapturing = false
+        } catch {
+            self.error = error
+        }
+    }
+
+    /// Deletes a progress photo
+    /// - Parameter photo: The photo to delete
+    func deletePhoto(_ photo: ProgressPhoto) async {
+        error = nil
+
+        do {
+            try await progressPhotoRepository.delete(id: photo.id)
+
+            // Remove from local array
+            photos.removeAll { $0.id == photo.id }
+
+            // Clear selection if the deleted photo was selected
+            if selectedPhoto?.id == photo.id {
+                selectedPhoto = nil
+            }
+        } catch {
+            self.error = error
+        }
+    }
+
+    /// Updates the photo reminder interval
+    /// - Parameter interval: The new reminder interval
+    func updateReminderInterval(_ interval: PhotoReminderInterval) async {
+        error = nil
+
+        do {
+            try await schedulePhotoReminderUseCase.execute(
+                plantID: plantID,
+                plantName: plantName,
+                interval: interval
+            )
+            reminderInterval = interval
+            saveReminderInterval()
+        } catch {
+            self.error = error
+        }
+    }
+
+    /// Clears any error state
+    func clearError() {
+        error = nil
+    }
+
+    // MARK: - Time-Lapse Navigation
+
+    /// Gets the index of a photo in the chronological array
+    /// - Parameter photo: The photo to find
+    /// - Returns: The index, or nil if not found
+    func chronologicalIndex(of photo: ProgressPhoto) -> Int? {
+        chronologicalPhotos.firstIndex(where: { $0.id == photo.id })
+    }
+
+    /// Gets the next photo in chronological order for time-lapse
+    /// - Parameter currentPhoto: The current photo
+    /// - Returns: The next photo, or the first photo if at the end
+    func nextPhoto(after currentPhoto: ProgressPhoto) -> ProgressPhoto? {
+        guard let currentIndex = chronologicalIndex(of: currentPhoto) else { return nil }
+        let nextIndex = (currentIndex + 1) % chronologicalPhotos.count
+        return chronologicalPhotos[nextIndex]
+    }
+
+    /// Gets the previous photo in chronological order
+    /// - Parameter currentPhoto: The current photo
+    /// - Returns: The previous photo, or the last photo if at the beginning
+    func previousPhoto(before currentPhoto: ProgressPhoto) -> ProgressPhoto? {
+        guard let currentIndex = chronologicalIndex(of: currentPhoto) else { return nil }
+        let previousIndex = currentIndex > 0 ? currentIndex - 1 : chronologicalPhotos.count - 1
+        return chronologicalPhotos[previousIndex]
+    }
+
+    // MARK: - Private Methods
+
+    private func loadReminderInterval() {
+        let key = "photo_reminder_interval_\(plantID.uuidString)"
+        if let rawValue = UserDefaults.standard.string(forKey: key),
+           let interval = PhotoReminderInterval(rawValue: rawValue) {
+            reminderInterval = interval
+        }
+    }
+
+    private func saveReminderInterval() {
+        let key = "photo_reminder_interval_\(plantID.uuidString)"
+        UserDefaults.standard.set(reminderInterval.rawValue, forKey: key)
+    }
+
+    // MARK: - Sample Data for Previews
+
+    static var samplePhotos: [ProgressPhoto] {
+        let calendar = Calendar.current
+        let now = Date()
+
+        return [
+            ProgressPhoto(
+                id: UUID(),
+                plantID: UUID(),
+                imageData: Data(),
+                thumbnailData: Data(),
+                dateTaken: now,
+                notes: "Looking healthy today!"
+            ),
+            ProgressPhoto(
+                id: UUID(),
+                plantID: UUID(),
+                imageData: Data(),
+                thumbnailData: Data(),
+                dateTaken: calendar.date(byAdding: .day, value: -7, to: now)!,
+                notes: nil
+            ),
+            ProgressPhoto(
+                id: UUID(),
+                plantID: UUID(),
+                imageData: Data(),
+                thumbnailData: Data(),
+                dateTaken: calendar.date(byAdding: .day, value: -14, to: now)!,
+                notes: "New leaf emerging"
+            ),
+            ProgressPhoto(
+                id: UUID(),
+                plantID: UUID(),
+                imageData: Data(),
+                thumbnailData: Data(),
+                dateTaken: calendar.date(byAdding: .day, value: -21, to: now)!,
+                notes: nil
+            ),
+            ProgressPhoto(
+                id: UUID(),
+                plantID: UUID(),
+                imageData: Data(),
+                thumbnailData: Data(),
+                dateTaken: calendar.date(byAdding: .day, value: -28, to: now)!,
+                notes: "First photo after repotting"
+            )
+        ]
+    }
+}
+
+// MARK: - Mock Implementations for Previews
+
+/// Mock progress photo repository for SwiftUI previews
+private struct MockProgressPhotoRepository: ProgressPhotoRepositoryProtocol {
+    func save(_ photo: ProgressPhoto) async throws {
+        // No-op for preview
+    }
+
+    func fetch(id: UUID) async throws -> ProgressPhoto? {
+        return ProgressPhotosViewModel.samplePhotos.first { $0.id == id }
+    }
+
+    func fetchAll(for plantID: UUID) async throws -> [ProgressPhoto] {
+        return ProgressPhotosViewModel.samplePhotos
+    }
+
+    func delete(id: UUID) async throws {
+        // No-op for preview
+    }
+
+    func deleteAll(for plantID: UUID) async throws {
+        // No-op for preview
+    }
+}
+
+/// Mock capture use case for SwiftUI previews
+private struct MockCaptureProgressPhotoUseCase: CaptureProgressPhotoUseCaseProtocol {
+    func execute(plantID: UUID, imageData: Data, notes: String?) async throws -> ProgressPhoto {
+        return ProgressPhoto(
+            id: UUID(),
+            plantID: plantID,
+            imageData: imageData,
+            thumbnailData: imageData,
+            dateTaken: Date(),
+            notes: notes
+        )
+    }
+}
+
+/// Mock schedule reminder use case for SwiftUI previews
+private struct MockSchedulePhotoReminderUseCase: SchedulePhotoReminderUseCaseProtocol {
+    func execute(plantID: UUID, plantName: String, interval: PhotoReminderInterval) async throws {
+        // No-op for preview
+    }
+
+    func cancelReminder(for plantID: UUID) async {
+        // No-op for preview
+    }
+}
--- a/PlantGuide/Presentation/Scenes/ProgressPhotos/TimeLapsePlayerView.swift
+++ b/PlantGuide/Presentation/Scenes/ProgressPhotos/TimeLapsePlayerView.swift
@@ -0,0 +1,381 @@
+//
+//  TimeLapsePlayerView.swift
+//  PlantGuide
+//
+//  Created on 1/23/26.
+//
+
+import SwiftUI
+
+// MARK: - TimeLapsePlayerView
+
+/// Player view for viewing progress photos as a time-lapse animation
+///
+/// Features:
+/// - Current photo display with date
+/// - Manual left/right navigation between photos
+/// - Play/pause button for auto-advance
+/// - Speed slider (0.1s to 2.0s per frame)
+/// - Photo counter (e.g., "3 of 15")
+@MainActor
+struct TimeLapsePlayerView: View {
+    // MARK: - Properties
+
+    /// All photos in chronological order (oldest first)
+    let photos: [ProgressPhoto]
+
+    /// The initial photo to display
+    let initialPhoto: ProgressPhoto
+
+    /// Speed binding for persistence across view dismissal
+    @Binding var speed: Double
+
+    @State private var currentPhoto: ProgressPhoto
+    @State private var isPlaying: Bool = false
+    @State private var playbackTask: Task<Void, Never>?
+
+    @Environment(\.dismiss) private var dismiss
+
+    // MARK: - Speed Constants
+
+    private let minSpeed: Double = 0.1
+    private let maxSpeed: Double = 2.0
+
+    // MARK: - Initialization
+
+    init(photos: [ProgressPhoto], initialPhoto: ProgressPhoto, speed: Binding<Double>) {
+        self.photos = photos
+        self.initialPhoto = initialPhoto
+        self._speed = speed
+        self._currentPhoto = State(initialValue: initialPhoto)
+    }
+
+    // MARK: - Computed Properties
+
+    private var currentIndex: Int {
+        photos.firstIndex(where: { $0.id == currentPhoto.id }) ?? 0
+    }
+
+    private var photoCountText: String {
+        "\(currentIndex + 1) of \(photos.count)"
+    }
+
+    private var formattedDate: String {
+        let formatter = DateFormatter()
+        formatter.dateStyle = .medium
+        formatter.timeStyle = .none
+        return formatter.string(from: currentPhoto.dateTaken)
+    }
+
+    private var speedText: String {
+        String(format: "%.1fs/frame", speed)
+    }
+
+    // MARK: - Body
+
+    var body: some View {
+        NavigationStack {
+            ZStack {
+                Color.black.ignoresSafeArea()
+
+                VStack(spacing: 0) {
+                    // Photo display area
+                    photoDisplayView
+                        .frame(maxHeight: .infinity)
+
+                    // Controls
+                    controlsView
+                        .padding(.vertical, 20)
+                        .background(Color.black.opacity(0.9))
+                }
+            }
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbarBackground(.visible, for: .navigationBar)
+            .toolbarBackground(Color.black.opacity(0.9), for: .navigationBar)
+            .toolbarColorScheme(.dark, for: .navigationBar)
+            .toolbar {
+                ToolbarItem(placement: .topBarLeading) {
+                    Button("Done") {
+                        stopPlayback()
+                        dismiss()
+                    }
+                    .foregroundStyle(.white)
+                }
+
+                ToolbarItem(placement: .principal) {
+                    Text("Time-Lapse")
+                        .font(.headline)
+                        .foregroundStyle(.white)
+                }
+            }
+            .gesture(
+                DragGesture(minimumDistance: 50)
+                    .onEnded { value in
+                        handleSwipe(translation: value.translation)
+                    }
+            )
+            .onDisappear {
+                stopPlayback()
+            }
+        }
+    }
+
+    // MARK: - Photo Display View
+
+    private var photoDisplayView: some View {
+        ZStack {
+            // Photo
+            if let uiImage = UIImage(data: currentPhoto.imageData) {
+                Image(uiImage: uiImage)
+                    .resizable()
+                    .aspectRatio(contentMode: .fit)
+                    .id(currentPhoto.id) // Force view update on photo change
+                    .transition(.opacity)
+                    .animation(.easeInOut(duration: 0.15), value: currentPhoto.id)
+            } else {
+                Rectangle()
+                    .fill(Color(.systemGray4))
+                    .aspectRatio(4/3, contentMode: .fit)
+                    .overlay {
+                        Image(systemName: "photo")
+                            .font(.system(size: 40))
+                            .foregroundStyle(.secondary)
+                    }
+            }
+
+            // Date and counter overlay
+            VStack {
+                HStack {
+                    // Photo counter
+                    Text(photoCountText)
+                        .font(.caption)
+                        .fontWeight(.medium)
+                        .foregroundStyle(.white)
+                        .padding(.horizontal, 10)
+                        .padding(.vertical, 6)
+                        .background(
+                            Capsule()
+                                .fill(Color.black.opacity(0.6))
+                        )
+
+                    Spacer()
+                }
+                .padding()
+
+                Spacer()
+            }
+        }
+        .accessibilityElement(children: .combine)
+        .accessibilityLabel("Progress photo \(currentIndex + 1) of \(photos.count), taken on \(formattedDate)")
+    }
+
+    // MARK: - Controls View
+
+    private var controlsView: some View {
+        VStack(spacing: 24) {
+            // Navigation and date row
+            navigationRow
+
+            // Speed slider
+            speedSliderRow
+
+            // Play/Pause button
+            playPauseButton
+        }
+        .padding(.horizontal, 24)
+    }
+
+    private var navigationRow: some View {
+        HStack(spacing: 20) {
+            // Previous button
+            Button {
+                navigateToPrevious()
+            } label: {
+                Image(systemName: "chevron.left")
+                    .font(.system(size: 24, weight: .medium))
+                    .foregroundStyle(.white)
+                    .frame(width: 44, height: 44)
+                    .background(
+                        Circle()
+                            .fill(Color.white.opacity(0.15))
+                    )
+            }
+            .disabled(photos.count < 2)
+            .opacity(photos.count < 2 ? 0.5 : 1.0)
+            .accessibilityLabel("Previous photo")
+
+            Spacer()
+
+            // Date display
+            Text(formattedDate)
+                .font(.headline)
+                .foregroundStyle(.white)
+                .accessibilityLabel("Photo taken on \(formattedDate)")
+
+            Spacer()
+
+            // Next button
+            Button {
+                navigateToNext()
+            } label: {
+                Image(systemName: "chevron.right")
+                    .font(.system(size: 24, weight: .medium))
+                    .foregroundStyle(.white)
+                    .frame(width: 44, height: 44)
+                    .background(
+                        Circle()
+                            .fill(Color.white.opacity(0.15))
+                    )
+            }
+            .disabled(photos.count < 2)
+            .opacity(photos.count < 2 ? 0.5 : 1.0)
+            .accessibilityLabel("Next photo")
+        }
+    }
+
+    private var speedSliderRow: some View {
+        VStack(spacing: 8) {
+            HStack {
+                Text("Speed")
+                    .font(.subheadline)
+                    .foregroundStyle(.white.opacity(0.8))
+
+                Spacer()
+
+                Text(speedText)
+                    .font(.subheadline)
+                    .fontWeight(.medium)
+                    .foregroundStyle(.white)
+            }
+
+            Slider(
+                value: $speed,
+                in: minSpeed...maxSpeed,
+                step: 0.1
+            )
+            .tint(.green)
+            .accessibilityLabel("Playback speed")
+            .accessibilityValue("\(speedText) per frame")
+        }
+    }
+
+    private var playPauseButton: some View {
+        Button {
+            togglePlayback()
+        } label: {
+            HStack(spacing: 10) {
+                Image(systemName: isPlaying ? "pause.fill" : "play.fill")
+                    .font(.system(size: 18))
+                Text(isPlaying ? "Pause" : "Play")
+                    .font(.system(size: 17, weight: .semibold))
+            }
+            .foregroundStyle(.black)
+            .frame(maxWidth: .infinity)
+            .padding(.vertical, 16)
+            .background(
+                RoundedRectangle(cornerRadius: 14)
+                    .fill(Color.white)
+            )
+        }
+        .disabled(photos.count < 2)
+        .opacity(photos.count < 2 ? 0.5 : 1.0)
+        .accessibilityLabel(isPlaying ? "Pause time-lapse" : "Play time-lapse")
+        .accessibilityHint(photos.count < 2 ? "Requires at least 2 photos" : "")
+    }
+
+    // MARK: - Navigation Methods
+
+    private func navigateToNext() {
+        guard photos.count > 1 else { return }
+
+        let nextIndex = (currentIndex + 1) % photos.count
+        withAnimation(.easeInOut(duration: 0.15)) {
+            currentPhoto = photos[nextIndex]
+        }
+    }
+
+    private func navigateToPrevious() {
+        guard photos.count > 1 else { return }
+
+        let previousIndex = currentIndex > 0 ? currentIndex - 1 : photos.count - 1
+        withAnimation(.easeInOut(duration: 0.15)) {
+            currentPhoto = photos[previousIndex]
+        }
+    }
+
+    private func handleSwipe(translation: CGSize) {
+        // Horizontal swipe detection
+        if translation.width < -50 {
+            // Swipe left - next photo
+            navigateToNext()
+        } else if translation.width > 50 {
+            // Swipe right - previous photo
+            navigateToPrevious()
+        }
+    }
+
+    // MARK: - Playback Control
+
+    private func togglePlayback() {
+        if isPlaying {
+            stopPlayback()
+        } else {
+            startPlayback()
+        }
+    }
+
+    private func startPlayback() {
+        guard photos.count >= 2 else { return }
+
+        isPlaying = true
+
+        playbackTask = Task {
+            while !Task.isCancelled && isPlaying {
+                // Wait for the current speed duration
+                try? await Task.sleep(for: .seconds(speed))
+
+                guard !Task.isCancelled && isPlaying else { break }
+
+                // Advance to next photo
+                await MainActor.run {
+                    navigateToNext()
+                }
+            }
+        }
+    }
+
+    private func stopPlayback() {
+        isPlaying = false
+        playbackTask?.cancel()
+        playbackTask = nil
+    }
+}
+
+// MARK: - Previews
+
+#Preview("Time-Lapse Player") {
+    let photos = ProgressPhotosViewModel.samplePhotos.sorted { $0.dateTaken < $1.dateTaken }
+
+    return TimeLapsePlayerView(
+        photos: photos,
+        initialPhoto: photos.first!,
+        speed: .constant(0.3)
+    )
+}
+
+#Preview("Time-Lapse Player - Single Photo") {
+    let photo = ProgressPhoto(
+        id: UUID(),
+        plantID: UUID(),
+        imageData: Data(),
+        thumbnailData: Data(),
+        dateTaken: Date(),
+        notes: nil
+    )
+
+    return TimeLapsePlayerView(
+        photos: [photo],
+        initialPhoto: photo,
+        speed: .constant(0.5)
+    )
+}