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/subview/CountdownView.swift

@@ -8,15 +8,17 @@
 import SwiftUI
 
 struct CountdownView: View {
-    @StateObject var bridgeModule = BridgeModule.shared
-    
+    let currentExerciseDuration: Int?
+    let currentExerciseTimeLeft: Int
+
     var body: some View {
-        if let duration = bridgeModule.currentWorkoutInfo.currentExercise?.duration,
+        if let duration = currentExerciseDuration,
            duration > 0 {
             HStack {
-                if bridgeModule.currentExerciseTimeLeft >= 0 && duration > bridgeModule.currentExerciseTimeLeft {
-                    ProgressView(value: Float(bridgeModule.currentExerciseTimeLeft), total: Float(duration))
-                        .tint(Color("appColor"))
+                if currentExerciseTimeLeft >= 0 && duration > currentExerciseTimeLeft {
+                    ProgressView(value: Float(currentExerciseTimeLeft), total: Float(duration))
+                        .tint(currentExerciseTimeLeft < 5 ? WerkoutTheme.danger : WerkoutTheme.accent)
+                        .animation(.easeInOut, value: currentExerciseTimeLeft < 5)
                 }
             }
         }
@@ -25,6 +27,6 @@ struct CountdownView: View {
 
 struct CountdownView_Previews: PreviewProvider {
     static var previews: some View {
-        CountdownView()
+        CountdownView(currentExerciseDuration: 30, currentExerciseTimeLeft: 15)
     }
 }