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/Network/Fetchables.swift

@@ -17,7 +17,7 @@ class WorkoutDetailFetchable: Fetchable {
     var endPoint: String
         
     init(workoutID: Int) {
-        self.endPoint = "/workout/"+String(workoutID)+"/details/"
+        self.endPoint = "/workout/\(workoutID)/details/"
     }
 }
 
@@ -103,7 +103,7 @@ class AllNSFWVideosFetchable: Fetchable {
     var endPoint: String = "/videos/nsfw_videos/"
 }
 
-class RefreshUserInfoFetcable: Fetchable {
+class RefreshUserInfoFetchable: Fetchable {
     typealias Response = RegisteredUser
     var endPoint: String = "/registered_user/refresh/"
 }