fix: 13 audit fixes — memory, concurrency, performance, accessibility

Critical:
- ProgressViewModel: use single stored ModelContext instead of creating
  new ones per operation (deleteVisit silently no-op'd)
- ProgressViewModel: convert expensive computed properties to stored
  with explicit recompute after mutations (3x recomputation per render)

Memory:
- AnimatedSportsIcon: replace recursive GCD asyncAfter with Task loop,
  cancelled in onDisappear (19 unkillable timer chains)
- ItineraryItemService: remove [weak self] from actor Task (semantically
  wrong, silently drops flushPendingUpdates)
- VisitPhotoService: remove [weak self] from @MainActor Task closures

Concurrency:
- StoreManager: replace nested MainActor.run{Task{}} with direct await
  in listenForTransactions (fire-and-forget race)
- VisitPhotoService: move JPEG encoding/file writing off MainActor via
  nonisolated static helper + Task.detached
- SportsIconImageGenerator: replace GCD dispatch with Task.detached for
  structured concurrency compliance

Performance:
- Game/RichGame: cache DateFormatters as static lets instead of
  allocating per-call (hundreds of allocations in schedule view)
- TripDetailView: wrap ~10 routeWaypoints print() in #if DEBUG, remove
  2 let _ = print() from TripMapView.body (fires every render)

Accessibility:
- GameRow: add combined VoiceOver label (was reading abbreviations
  letter-by-letter)
- Sport badges: add accessibilityLabel to prevent SF symbol name readout
- SportsTimeApp: post UIAccessibility.screenChanged after bootstrap
  completes so VoiceOver users know app is ready

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

SportsTime/Core/Services/VisitPhotoService.swift

@@ -108,8 +108,8 @@ final class VisitPhotoService {
         try modelContext.save()
 
         // Queue background upload
-        Task { [weak self] in
-            await self?.uploadPhoto(metadata: metadata, image: image)
+        Task {
+            await self.uploadPhoto(metadata: metadata, image: image)
         }
 
         return metadata
@@ -211,12 +211,34 @@ final class VisitPhotoService {
 
     // MARK: - Private Methods
 
+    /// Prepare image data and temp file off the main actor
+    nonisolated private static func prepareImageData(
+        _ image: UIImage,
+        quality: CGFloat
+    ) throws -> (Data, URL) {
+        guard let data = image.jpegData(compressionQuality: quality) else {
+            throw PhotoServiceError.invalidImage
+        }
+        let tempURL = FileManager.default.temporaryDirectory
+            .appendingPathComponent(UUID().uuidString)
+            .appendingPathExtension("jpg")
+        try data.write(to: tempURL)
+        return (data, tempURL)
+    }
+
     private func uploadPhoto(metadata: VisitPhotoMetadata, image: UIImage) async {
-        guard let imageData = image.jpegData(compressionQuality: Self.compressionQuality) else {
-            await MainActor.run {
-                metadata.uploadStatus = .failed
-                try? modelContext.save()
-            }
+        // Capture MainActor-isolated value before entering detached context
+        let quality = Self.compressionQuality
+
+        // Perform CPU-intensive JPEG encoding off MainActor
+        let tempURL: URL
+        do {
+            (_, tempURL) = try await Task.detached(priority: .utility) {
+                try Self.prepareImageData(image, quality: quality)
+            }.value
+        } catch {
+            metadata.uploadStatus = .failed
+            try? modelContext.save()
             return
         }
 
@@ -224,17 +246,15 @@ final class VisitPhotoService {
         do {
             let status = try await container.accountStatus()
             guard status == .available else {
-                await MainActor.run {
-                    metadata.uploadStatus = .failed
-                    try? modelContext.save()
-                }
+                try? FileManager.default.removeItem(at: tempURL)
+                metadata.uploadStatus = .failed
+                try? modelContext.save()
                 return
             }
         } catch {
-            await MainActor.run {
-                metadata.uploadStatus = .failed
-                try? modelContext.save()
-            }
+            try? FileManager.default.removeItem(at: tempURL)
+            metadata.uploadStatus = .failed
+            try? modelContext.save()
             return
         }
 
@@ -242,14 +262,7 @@ final class VisitPhotoService {
         let recordID = CKRecord.ID(recordName: metadata.id.uuidString)
         let record = CKRecord(recordType: Self.recordType, recordID: recordID)
 
-        // Write image to temporary file for CKAsset
-        let tempURL = FileManager.default.temporaryDirectory
-            .appendingPathComponent(UUID().uuidString)
-            .appendingPathExtension("jpg")
-
         do {
-            try imageData.write(to: tempURL)
-
             let asset = CKAsset(fileURL: tempURL)
             record["imageAsset"] = asset
             record["visitId"] = metadata.visitId.uuidString
@@ -263,28 +276,16 @@ final class VisitPhotoService {
             try? FileManager.default.removeItem(at: tempURL)
 
             // Update metadata
-            await MainActor.run {
-                metadata.cloudKitAssetId = savedRecord.recordID.recordName
-                metadata.uploadStatus = .uploaded
-                try? modelContext.save()
-            }
+            metadata.cloudKitAssetId = savedRecord.recordID.recordName
+            metadata.uploadStatus = .uploaded
+            try? modelContext.save()
 
-        } catch let error as CKError {
-            // Clean up temp file
-            try? FileManager.default.removeItem(at: tempURL)
-
-            await MainActor.run {
-                metadata.uploadStatus = .failed
-                try? modelContext.save()
-            }
         } catch {
             // Clean up temp file
             try? FileManager.default.removeItem(at: tempURL)
 
-            await MainActor.run {
-                metadata.uploadStatus = .failed
-                try? modelContext.save()
-            }
+            metadata.uploadStatus = .failed
+            try? modelContext.save()
         }
     }
 
@@ -372,20 +373,20 @@ final class PhotoGalleryViewModel {
         }
 
         isLoadingFullImage = true
-        Task { [weak self] in
+        Task {
             do {
-                let image = try await self?.photoService.fetchFullImage(for: metadata)
-                self?.fullResolutionImage = image
+                let image = try await photoService.fetchFullImage(for: metadata)
+                fullResolutionImage = image
             } catch let error as PhotoServiceError {
-                self?.error = error
+                self.error = error
                 // Fall back to thumbnail
                 if let data = metadata.thumbnailData {
-                    self?.fullResolutionImage = UIImage(data: data)
+                    fullResolutionImage = UIImage(data: data)
                 }
             } catch {
-                self?.error = .downloadFailed(error.localizedDescription)
+                self.error = .downloadFailed(error.localizedDescription)
             }
-            self?.isLoadingFullImage = false
+            isLoadingFullImage = false
         }
     }