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/UserStore.swift

@@ -148,7 +148,7 @@ class UserStore: ObservableObject {
     }
 
     public func refreshUserData() {
-        RefreshUserInfoFetcable().fetch(completion: { result in
+        RefreshUserInfoFetchable().fetch(completion: { result in
             switch result {
             case .success(let registeredUser):
                 let sanitizedModel = self.userByReplacingToken(registeredUser, token: self.normalizedToken(from: registeredUser.token))
@@ -179,7 +179,7 @@ class UserStore: ObservableObject {
         runtimeReporter.recordInfo("User logged out", metadata: ["reason": reason])
 
         DispatchQueue.main.async {
-            NotificationCenter.default.post(name: AppNotifications.createdNewWorkout, object: nil, userInfo: nil)
+            NotificationCenter.default.post(name: AppNotifications.userLoggedOut, object: nil, userInfo: nil)
         }
     }