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/YearView/YearView.swift

@@ -24,7 +24,7 @@ struct YearView: View {
     @EnvironmentObject var iapManager: IAPManager
     @StateObject public var viewModel: YearViewModel
     @StateObject private var filteredDays = DaysFilterClass.shared
-    @StateObject private var shareImage = StupidAssShareObservableObject()
+    @StateObject private var shareImage = ShareImageStateViewModel()
     @State private var trialWarningHidden = false
     @State private var showSubscriptionStore = false
 
@@ -49,8 +49,8 @@ struct YearView: View {
                                 theme: theme,
                                 filteredDays: filteredDays.currentFilters,
                                 onShare: { image in
-                                    shareImage.fuckingWrappedShrable = image
-                                    shareImage.showFuckingSheet = true
+                                    shareImage.selectedShareImage = image
+                                    shareImage.showSheet = true
                                 }
                             )
                         }
@@ -100,8 +100,8 @@ struct YearView: View {
         .sheet(isPresented: $showSubscriptionStore) {
             FeelsSubscriptionStoreView()
         }
-        .sheet(isPresented: $shareImage.showFuckingSheet) {
-            if let uiImage = shareImage.fuckingWrappedShrable {
+        .sheet(isPresented: $shareImage.showSheet) {
+            if let uiImage = shareImage.selectedShareImage {
                 ImageOnlyShareSheet(photo: uiImage)
             }
         }
@@ -340,8 +340,8 @@ struct YearCard: View {
 
             // Month Labels
             HStack(spacing: 2) {
-                ForEach(months, id: \.self) { month in
-                    Text(month)
+                ForEach(months.indices, id: \.self) { index in
+                    Text(months[index])
                         .font(.system(size: 9, weight: .medium))
                         .foregroundColor(textColor.opacity(0.5))
                         .frame(maxWidth: .infinity)
@@ -419,6 +419,19 @@ struct YearHeatmapCell: View {
         RoundedRectangle(cornerRadius: 2)
             .fill(cellColor)
             .aspectRatio(1, contentMode: .fit)
+            .accessibilityLabel(accessibilityDescription)
+    }
+
+    private var accessibilityDescription: String {
+        if !isFiltered {
+            return "Filtered out"
+        } else if color == Mood.placeholder.color {
+            return "Empty"
+        } else if color == Mood.missing.color {
+            return "No mood logged"
+        } else {
+            return "Mood entry"
+        }
     }
 
     private var cellColor: Color {