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/BridgeModule+Timer.swift

@@ -9,15 +9,18 @@ import Foundation
 
 extension BridgeModule {
     func startWorkoutTimer() {
-        currentWorkoutRunTimer?.invalidate()
-        currentWorkoutRunTimer = nil
-        currentWorkoutRunTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true, block: { [weak self] _ in
-            guard let self else { return }
-            self.currentWorkoutRunTimeInSeconds += 1
-            self.sendCurrentExerciseToWatch()
-        })
-        currentWorkoutRunTimer?.tolerance = 0.1
-        currentWorkoutRunTimer?.fire()
+        DispatchQueue.main.async {
+            self.currentWorkoutRunTimer?.invalidate()
+            self.currentWorkoutRunTimer = nil
+            self.currentWorkoutRunTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true, block: { [weak self] _ in
+                guard let self else { return }
+                dispatchPrecondition(condition: .onQueue(.main))
+                self.currentWorkoutRunTimeInSeconds += 1
+                self.sendCurrentExerciseToWatch()
+            })
+            self.currentWorkoutRunTimer?.tolerance = 0.1
+            self.currentWorkoutRunTimer?.fire()
+        }
     }
     
     func startExerciseTimerWith(duration: Int) {