Fix build errors, resolve all warnings, and improve code quality

Widget Extension Fixes:
- Create standalone WidgetDataProvider for widget data isolation
- Add WIDGET_EXTENSION compiler flag for conditional compilation
- Fix DataController references in widget-shared files
- Sync widget version numbers with main app (23, 1.0.2)
- Add WidgetBackground color to asset catalog

Warning Resolutions:
- Fix UIScreen.main deprecation in BGView and SharingListView
- Fix Text '+' concatenation deprecation in PurchaseButtonView and SettingsTabView
- Fix exhaustive switch in BiometricAuthManager (add .none case)
- Fix var to let in ExportService (3 instances)
- Fix unused result warning in NoteEditorView
- Fix ForEach duplicate ID warnings in MonthView and YearView

Code Quality Improvements:
- Wrap bypassSubscription in #if DEBUG for security
- Rename StupidAssCustomWidgetObservableObject to CustomWidgetStateViewModel
- Add @MainActor to IconViewModel
- Replace fatalError with graceful fallback in SharedModelContainer
- Add [weak self] to closures in DayViewViewModel
- Add OSLog-based AppLogger for production logging
- Add ImageCache with NSCache for memory efficiency
- Add AccessibilityHelpers with Reduce Motion support
- Create DataControllerProtocol for dependency injection
- Update .gitignore with secrets exclusions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Shared/Views/MonthView/MonthDetailView.swift

@@ -13,7 +13,7 @@ struct MonthDetailView: View {
     @AppStorage(UserDefaultsStore.Keys.moodTint.rawValue, store: GroupUserDefaults.groupDefaults) private var moodTint: MoodTints = .Default
     @AppStorage(UserDefaultsStore.Keys.textColor.rawValue, store: GroupUserDefaults.groupDefaults) private var textColor: Color = DefaultTextColor.textColor
 
-    @StateObject private var shareImage = StupidAssShareObservableObject()
+    @StateObject private var shareImage = ShareImageStateViewModel()
 
     @State private var showingSheet = false
     @State private var selectedEntry: MoodEntryModel?
@@ -58,8 +58,8 @@ struct MonthDetailView: View {
                         impactMed.impactOccurred()
                         
                         let _image = self.image
-                        self.shareImage.showFuckingSheet = true
-                        self.shareImage.fuckingWrappedShrable = _image
+                        self.shareImage.showSheet = true
+                        self.shareImage.selectedShareImage = _image
                     }
             }
             .background(
@@ -81,8 +81,8 @@ struct MonthDetailView: View {
         .background(
             theme.currentTheme.bg
         )
-        .sheet(isPresented: self.$shareImage.showFuckingSheet) {
-            if let uiImage = self.shareImage.fuckingWrappedShrable {
+        .sheet(isPresented: self.$shareImage.showSheet) {
+            if let uiImage = self.shareImage.selectedShareImage {
                 ShareSheet(photo: uiImage)
             }
         }