Fix 28 issues from deep audit and UI audit + redesign changes

Deep audit (issues 2-14):
- Add missing WCSession handlers for applicationContext and userInfo
- Fix BoundedFIFOQueue race condition with serial dispatch queue
- Fix timer race condition with main thread guarantee
- Fix watch pause state divergence — phone is now source of truth
- Fix wrong notification posted on logout (createdNewWorkout → userLoggedOut)
- Fix POST status check to accept any 2xx (was exact match)
- Fix @StateObject → @ObservedObject for injected viewModel
- Add pull-to-refresh to CompletedWorkoutsView
- Fix typos: RefreshUserInfoFetcable, defualtPackageModle
- Replace string concatenation with interpolation
- Replace 6 @StateObject with @ObservedObject for BridgeModule.shared
- Replace 7 hardcoded AVPlayer URLs with BaseURLs.currentBaseURL

UI audit (issues 1-15):
- Fix GeometryReader eating VStack space — replaced with .overlay
- Fix refreshable continuation resuming before fetch completes
- Remove duplicate @State workouts — derive from DataStore
- Decouple leaf views from BridgeModule (pass discrete values)
- Convert selectedIds from Array to Set for O(1) lookups
- Extract .sorted() from var body into computed properties
- Move search filter out of ForEach render loop
- Replace import SwiftUI with import Combine in non-UI classes
- Mark all @State properties private
- Extract L/R exercise auto-add logic to WorkoutViewModel
- Use enumerated() instead of .indices in ForEach
- Make AddSupersetView frame flexible instead of fixed 300pt
- Hoist Set construction out of per-exercise filter loop
- Move ViewModel network fetch from init to load()

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

iphone/Werkout_ios/Views/CreateWorkout/CreateViewModels.swift

@@ -5,7 +5,8 @@
 //  Created by Trey Tartt on 6/18/23.
 //
 
-import SwiftUI
+import Combine
+import Foundation
 import SharedCore
 
 class CreateWorkoutExercise: ObservableObject, Identifiable {
@@ -93,6 +94,9 @@ class WorkoutViewModel: ObservableObject {
     @Published var description = String()
     @Published var validationError: String?
     @Published var isUploading = false
+    // MARK: - Manual Invalidation
+    // Workaround: nested ObservableObject changes don't propagate to parent.
+    // Remove when migrating to @Observable (iOS 17+).
     @Published var randomValueForUpdatingValue = 0
     
     func increaseRandomNumberForUpdating() {
@@ -112,7 +116,32 @@ class WorkoutViewModel: ObservableObject {
             increaseRandomNumberForUpdating()
         }
     }
-    
+
+    func addExercise(_ exercise: Exercise, to superset: CreateWorkoutSuperSet) {
+        let workoutExercise = CreateWorkoutExercise(exercise: exercise)
+        superset.exercises.append(workoutExercise)
+
+        if exercise.side?.isEmpty == false {
+            autoAddSiblingExercises(for: exercise, to: superset)
+        }
+        increaseRandomNumberForUpdating()
+    }
+
+    private func autoAddSiblingExercises(for exercise: Exercise, to superset: CreateWorkoutSuperSet) {
+        guard let allExercises = DataStore.shared.allExercise else { return }
+        let siblings = allExercises.filter { $0.name == exercise.name }
+        guard siblings.count == 2,
+              let recover = allExercises.first(where: { $0.name.lowercased() == "recover" }) else { return }
+
+        let recoverExercise = CreateWorkoutExercise(exercise: recover)
+        superset.exercises.append(recoverExercise)
+
+        for sibling in siblings where sibling.id != exercise.id {
+            let otherSideExercise = CreateWorkoutExercise(exercise: sibling)
+            superset.exercises.append(otherSideExercise)
+        }
+    }
+
     func showRoundsError() {
         validationError = "Each superset must have at least one round."
     }