Add CoreData-based workout tracking app with iOS and watchOS targets

- Migrate from SwiftData to CoreData with CloudKit sync
- Add core models: Split, Exercise, Workout, WorkoutLog
- Implement tab-based UI: Workout Logs, Splits, Settings
- Add SF Symbols picker for split icons
- Add exercise picker filtered by split with exclusion of added exercises
- Integrate IndieAbout for settings/about section
- Add Yams for YAML exercise definition parsing
- Include starter exercise libraries (bodyweight, Planet Fitness)
- Add Date extensions for formatting (formattedTime, isSameDay)
- Format workout date ranges to show time-only for same-day end dates
- Add build number update script
- Add app icons

Workouts Watch App/Models/Exercise.swift

@@ -0,0 +1,54 @@
+import Foundation
+import CoreData
+
+@objc(Exercise)
+public class Exercise: NSManagedObject, Identifiable {
+    @NSManaged public var name: String
+    @NSManaged public var loadType: Int32
+    @NSManaged public var order: Int32
+    @NSManaged public var sets: Int32
+    @NSManaged public var reps: Int32
+    @NSManaged public var weight: Int32
+    @NSManaged public var duration: Date?
+    @NSManaged public var weightLastUpdated: Date?
+    @NSManaged public var weightReminderTimeIntervalWeeks: Int32
+
+    @NSManaged public var split: Split?
+
+    public var id: NSManagedObjectID { objectID }
+
+    var loadTypeEnum: LoadType {
+        get { LoadType(rawValue: Int(loadType)) ?? .weight }
+        set { loadType = Int32(newValue.rawValue) }
+    }
+}
+
+// MARK: - Fetch Request
+
+extension Exercise {
+    @nonobjc public class func fetchRequest() -> NSFetchRequest<Exercise> {
+        return NSFetchRequest<Exercise>(entityName: "Exercise")
+    }
+
+    static func orderedFetchRequest(for split: Split) -> NSFetchRequest<Exercise> {
+        let request = fetchRequest()
+        request.predicate = NSPredicate(format: "split == %@", split)
+        request.sortDescriptors = [NSSortDescriptor(keyPath: \Exercise.order, ascending: true)]
+        return request
+    }
+}
+
+
+enum LoadType: Int, CaseIterable {
+    case none = 0
+    case weight = 1
+    case duration = 2
+
+    var name: String {
+        switch self {
+        case .none: "None"
+        case .weight: "Weight"
+        case .duration: "Duration"
+        }
+    }
+}

Workouts Watch App/Models/Split.swift

@@ -0,0 +1,66 @@
+import Foundation
+import CoreData
+import SwiftUI
+
+@objc(Split)
+public class Split: NSManagedObject, Identifiable {
+    @NSManaged public var name: String
+    @NSManaged public var color: String
+    @NSManaged public var systemImage: String
+    @NSManaged public var order: Int32
+
+    @NSManaged public var exercises: NSSet?
+    @NSManaged public var workouts: NSSet?
+
+    public var id: NSManagedObjectID { objectID }
+
+    static let unnamed = "Unnamed Split"
+}
+
+// MARK: - Convenience Accessors
+
+extension Split {
+    var exercisesArray: [Exercise] {
+        let set = exercises as? Set<Exercise> ?? []
+        return set.sorted { $0.order < $1.order }
+    }
+
+    var workoutsArray: [Workout] {
+        let set = workouts as? Set<Workout> ?? []
+        return set.sorted { $0.start > $1.start }
+    }
+
+    func addToExercises(_ exercise: Exercise) {
+        let items = mutableSetValue(forKey: "exercises")
+        items.add(exercise)
+    }
+
+    func removeFromExercises(_ exercise: Exercise) {
+        let items = mutableSetValue(forKey: "exercises")
+        items.remove(exercise)
+    }
+
+    func addToWorkouts(_ workout: Workout) {
+        let items = mutableSetValue(forKey: "workouts")
+        items.add(workout)
+    }
+
+    func removeFromWorkouts(_ workout: Workout) {
+        let items = mutableSetValue(forKey: "workouts")
+        items.remove(workout)
+    }
+}
+
+// MARK: - Fetch Request
+
+extension Split {
+    @nonobjc public class func fetchRequest() -> NSFetchRequest<Split> {
+        return NSFetchRequest<Split>(entityName: "Split")
+    }
+
+    static func orderedFetchRequest() -> NSFetchRequest<Split> {
+        let request = fetchRequest()
+        request.sortDescriptors = [NSSortDescriptor(keyPath: \Split.order, ascending: true)]
+        return request
+    }
+}

Workouts Watch App/Models/Workout.swift

@@ -0,0 +1,71 @@
+import Foundation
+import CoreData
+
+@objc(Workout)
+public class Workout: NSManagedObject, Identifiable {
+    @NSManaged public var start: Date
+    @NSManaged public var end: Date?
+    @NSManaged private var statusRaw: String
+
+    @NSManaged public var split: Split?
+    @NSManaged public var logs: NSSet?
+
+    public var id: NSManagedObjectID { objectID }
+
+    var status: WorkoutStatus {
+        get { WorkoutStatus(rawValue: statusRaw) ?? .notStarted }
+        set { statusRaw = newValue.rawValue }
+    }
+
+    var label: String {
+        if status == .completed, let endDate = end {
+            return "\(start.formattedDate())—\(endDate.formattedDate())"
+        } else {
+            return start.formattedDate()
+        }
+    }
+
+    var statusName: String {
+        return status.displayName
+    }
+}
+
+// MARK: - Convenience Accessors
+
+extension Workout {
+    var logsArray: [WorkoutLog] {
+        let set = logs as? Set<WorkoutLog> ?? []
+        return set.sorted { $0.order < $1.order }
+    }
+
+    func addToLogs(_ log: WorkoutLog) {
+        let items = mutableSetValue(forKey: "logs")
+        items.add(log)
+    }
+
+    func removeFromLogs(_ log: WorkoutLog) {
+        let items = mutableSetValue(forKey: "logs")
+        items.remove(log)
+    }
+}
+
+// MARK: - Fetch Request
+
+extension Workout {
+    @nonobjc public class func fetchRequest() -> NSFetchRequest<Workout> {
+        return NSFetchRequest<Workout>(entityName: "Workout")
+    }
+
+    static func recentFetchRequest() -> NSFetchRequest<Workout> {
+        let request = fetchRequest()
+        request.sortDescriptors = [NSSortDescriptor(keyPath: \Workout.start, ascending: false)]
+        return request
+    }
+
+    static func fetchRequest(for split: Split) -> NSFetchRequest<Workout> {
+        let request = fetchRequest()
+        request.predicate = NSPredicate(format: "split == %@", split)
+        request.sortDescriptors = [NSSortDescriptor(keyPath: \Workout.start, ascending: false)]
+        return request
+    }
+}

Workouts Watch App/Models/WorkoutLog.swift

@@ -0,0 +1,43 @@
+import Foundation
+import CoreData
+
+@objc(WorkoutLog)
+public class WorkoutLog: NSManagedObject, Identifiable {
+    @NSManaged public var date: Date
+    @NSManaged public var sets: Int32
+    @NSManaged public var reps: Int32
+    @NSManaged public var weight: Int32
+    @NSManaged private var statusRaw: String?
+    @NSManaged public var order: Int32
+    @NSManaged public var exerciseName: String
+    @NSManaged public var currentStateIndex: Int32
+    @NSManaged public var elapsedSeconds: Int32
+    @NSManaged public var completed: Bool
+
+    @NSManaged public var workout: Workout?
+
+    public var id: NSManagedObjectID { objectID }
+
+    var status: WorkoutStatus? {
+        get {
+            guard let raw = statusRaw else { return nil }
+            return WorkoutStatus(rawValue: raw)
+        }
+        set { statusRaw = newValue?.rawValue }
+    }
+}
+
+// MARK: - Fetch Request
+
+extension WorkoutLog {
+    @nonobjc public class func fetchRequest() -> NSFetchRequest<WorkoutLog> {
+        return NSFetchRequest<WorkoutLog>(entityName: "WorkoutLog")
+    }
+
+    static func orderedFetchRequest(for workout: Workout) -> NSFetchRequest<WorkoutLog> {
+        let request = fetchRequest()
+        request.predicate = NSPredicate(format: "workout == %@", workout)
+        request.sortDescriptors = [NSSortDescriptor(keyPath: \WorkoutLog.order, ascending: true)]
+        return request
+    }
+}

Workouts Watch App/Models/WorkoutStatus.swift

@@ -0,0 +1,23 @@
+import Foundation
+
+enum WorkoutStatus: String, CaseIterable, Codable {
+    case notStarted = "notStarted"
+    case inProgress = "inProgress"
+    case completed = "completed"
+    case skipped = "skipped"
+
+    var displayName: String {
+        switch self {
+        case .notStarted:
+            return "Not Started"
+        case .inProgress:
+            return "In Progress"
+        case .completed:
+            return "Completed"
+        case .skipped:
+            return "Skipped"
+        }
+    }
+
+    var name: String { displayName }
+}