Workouts 2.0: re-base persistence on iCloud Drive documents

Replace Core Data + NSPersistentCloudKitContainer + App-Group store +
WatchConnectivity dictionary sync with the QuickRabbit iCloud-documents
architecture:

- iCloud Drive JSON documents are the sole source of truth (one file per
  aggregate: Splits/<ULID>.json, Workouts/YYYY/MM/<ULID>.json), with a
  rebuildable SwiftData cache populated only by an NSMetadataQuery observer
  and a connect-time reconcile. Soft-delete tombstones; hard iCloud gate.
- Shared model layer (ULID, Codable *Documents + stateless mappers, @Model
  cache entities, SwiftData container) compiled into both targets.
- New iPhone<->Watch bridge over WatchConnectivity keyed by ULIDs; the phone
  is the sole writer of iCloud Drive, the watch round-trips documents.
- AppServices DI + iCloud-required root gate; Swift 6 strict concurrency.
- Starter splits generated on demand from the bundled YAML catalogs.
- Migrate to XcodeGen (project.yml), iOS 26 / watchOS 26; CloudDocuments
  entitlement (drop CloudKit/App Group/aps-environment).
- Duration stored as Int seconds (was a Date epoch hack); fix workout
  end-on-create, undismissable delete dialog, toolbar-hiding nav stacks,
  and the Settings placeholder.
- Add README/CHANGELOG/LICENSE, .gitignore, refreshed REQUIREMENTS, and the
  Scripts/ TestFlight pipeline (release.sh + ASC API scripts).

MARKETING_VERSION 2.0.

Workouts/Views/WorkoutLogs/WeightProgressionChartView.swift

@@ -9,21 +9,31 @@
 
 import SwiftUI
 import Charts
-import CoreData
+import SwiftData
 
 struct WeightProgressionChartView: View {
-    @Environment(\.managedObjectContext) private var viewContext
-
     let exerciseName: String
-    @State private var weightData: [WeightDataPoint] = []
-    @State private var isLoading: Bool = true
-    @State private var motivationalMessage: String = ""
+
+    /// Completed logs for this exercise, oldest first.
+    @Query private var logs: [WorkoutLog]
+
+    init(exerciseName: String) {
+        self.exerciseName = exerciseName
+        let name = exerciseName
+        _logs = Query(
+            filter: #Predicate<WorkoutLog> { $0.exerciseName == name && $0.completed },
+            sort: \WorkoutLog.date,
+            order: .forward
+        )
+    }
+
+    private var weightData: [WeightDataPoint] {
+        logs.map { WeightDataPoint(date: $0.date, weight: $0.weight) }
+    }
 
     var body: some View {
         VStack(alignment: .leading) {
-            if isLoading {
-                ProgressView("Loading data...")
-            } else if weightData.isEmpty {
+            if weightData.isEmpty {
                 Text("No weight history available yet.")
                     .foregroundColor(.secondary)
                     .frame(maxWidth: .infinity, alignment: .center)
@@ -70,51 +80,33 @@ struct WeightProgressionChartView: View {
             }
         }
         .padding()
-        .onAppear {
-            loadWeightData()
-        }
     }
 
-    private func loadWeightData() {
-        isLoading = true
-
-        let request: NSFetchRequest<WorkoutLog> = WorkoutLog.fetchRequest()
-        request.predicate = NSPredicate(format: "exerciseName == %@ AND completed == YES", exerciseName)
-        request.sortDescriptors = [NSSortDescriptor(keyPath: \WorkoutLog.date, ascending: true)]
-
-        if let logs = try? viewContext.fetch(request) {
-            weightData = logs.map { log in
-                WeightDataPoint(date: log.date, weight: Int(log.weight))
-            }
-            generateMotivationalMessage()
+    private var motivationalMessage: String {
+        let data = weightData
+        guard data.count >= 2 else {
+            return "Complete more workouts to track your progress!"
         }
 
-        isLoading = false
-    }
-
-    private func generateMotivationalMessage() {
-        guard weightData.count >= 2 else {
-            motivationalMessage = "Complete more workouts to track your progress!"
-            return
-        }
-
-        let firstWeight = weightData.first?.weight ?? 0
-        let currentWeight = weightData.last?.weight ?? 0
+        let firstWeight = data.first?.weight ?? 0
+        let currentWeight = data.last?.weight ?? 0
         let weightDifference = currentWeight - firstWeight
 
         if weightDifference > 0 {
-            let percentIncrease = Int((Double(weightDifference) / Double(firstWeight)) * 100)
+            let percentIncrease = firstWeight > 0
+                ? Int((Double(weightDifference) / Double(firstWeight)) * 100)
+                : 0
             if percentIncrease >= 20 {
-                motivationalMessage = "Amazing progress! You've increased your weight by \(weightDifference) lbs (\(percentIncrease)%)!"
+                return "Amazing progress! You've increased your weight by \(weightDifference) lbs (\(percentIncrease)%)!"
             } else if percentIncrease >= 10 {
-                motivationalMessage = "Great job! You've increased your weight by \(weightDifference) lbs (\(percentIncrease)%)!"
+                return "Great job! You've increased your weight by \(weightDifference) lbs (\(percentIncrease)%)!"
             } else {
-                motivationalMessage = "You're making progress! Weight increased by \(weightDifference) lbs. Keep it up!"
+                return "You're making progress! Weight increased by \(weightDifference) lbs. Keep it up!"
             }
         } else if weightDifference == 0 {
-            motivationalMessage = "You're maintaining consistent weight. Focus on form and consider increasing when ready!"
+            return "You're maintaining consistent weight. Focus on form and consider increasing when ready!"
         } else {
-            motivationalMessage = "Your current weight is lower than when you started. Adjust your training as needed and keep pushing!"
+            return "Your current weight is lower than when you started. Adjust your training as needed and keep pushing!"
         }
     }
 }