Add interactive widget voting and fix warnings/bugs

Widget Features:
- Add inline voting to timeline widget when no entry exists for today
- Show random prompt from notification strings in voting mode
- Update vote widget to use simple icon style for selection
- Make stats bar full width in voted state view
- Add Localizable.strings to widget extension target

Bug Fixes:
- Fix inverted date calculation in InsightsViewModel streak logic
- Replace force unwraps with safe optional handling in widgets
- Replace fatalError calls with graceful error handling
- Fix CSV import safety in SettingsView

Warning Fixes:
- Add @retroactive to Color and Date extension conformances
- Update deprecated onChange(of:perform:) to new syntax
- Replace deprecated applicationIconBadgeNumber with setBadgeCount
- Replace deprecated UIApplication.shared.windows API
- Add @preconcurrency for Swift 6 protocol conformances
- Add missing widget family cases to switch statement
- Remove unused variables and #warning directives

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

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

Shared/Models/UserDefaultsStore.swift

@@ -62,14 +62,15 @@ class UserDefaultsStore {
         }
     }
     
+    @discardableResult
     static func saveOnboarding(onboardingData: OnboardingData) -> OnboardingData {
         do {
             let data = try JSONEncoder().encode(onboardingData)
             GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.savedOnboardingData.rawValue)
-            return UserDefaultsStore.getOnboarding()
         } catch {
-            fatalError("error saving")
+            print("Error saving onboarding: \(error)")
         }
+        return UserDefaultsStore.getOnboarding()
     }
     
     static func moodMoodImagable() -> MoodImagable.Type {
@@ -114,21 +115,21 @@ class UserDefaultsStore {
             return model
         } else {
             GroupUserDefaults.groupDefaults.removeObject(forKey: UserDefaultsStore.Keys.customWidget.rawValue)
-            
+
             let widget = CustomWidgetModel.randomWidget
             widget.isSaved = true
             let widgets = [widget]
-            let data = try! JSONEncoder().encode(widgets)
+
+            guard let data = try? JSONEncoder().encode(widgets) else {
+                return widgets
+            }
             GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.customWidget.rawValue)
 
-            if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.customWidget.rawValue) as? Data,
-               let models = try? JSONDecoder().decode([CustomWidgetModel].self, from: data) {
-                let sorted = models.sorted(by: {
-                    $0.createdDate < $1.createdDate
-                })
-                return sorted
+            if let savedData = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.customWidget.rawValue) as? Data,
+               let models = try? JSONDecoder().decode([CustomWidgetModel].self, from: savedData) {
+                return models.sorted { $0.createdDate < $1.createdDate }
             } else {
-                fatalError("error getting widgets")
+                return widgets
             }
         }
     }
@@ -160,12 +161,12 @@ class UserDefaultsStore {
             })
             let data = try JSONEncoder().encode(existingWidgets)
             GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.customWidget.rawValue)
-            return UserDefaultsStore.getCustomWidgets()
         } catch {
-            fatalError("error saving")
+            print("Error saving custom widget: \(error)")
         }
+        return UserDefaultsStore.getCustomWidgets()
     }
-    
+
     @discardableResult
     static func deleteCustomWidget(withUUID uuid: String) -> [CustomWidgetModel] {
         do {
@@ -184,22 +185,18 @@ class UserDefaultsStore {
                 existingWidgets.append(widget)
             }
             
-            if let _ = existingWidgets.first(where: {
-                $0.inUse == true
-            }) {} else {
-                if let first = existingWidgets.first {
-                    first.inUse = true
-                }
+            if existingWidgets.first(where: { $0.inUse == true }) == nil {
+                existingWidgets.first?.inUse = true
             }
-            
+
             let data = try JSONEncoder().encode(existingWidgets)
             GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.customWidget.rawValue)
-            return UserDefaultsStore.getCustomWidgets()
         } catch {
-            fatalError("error saving")
+            print("Error deleting custom widget: \(error)")
         }
+        return UserDefaultsStore.getCustomWidgets()
     }
-    
+
     static func getCustomMoodTint() -> SavedMoodTint {
         if let data = GroupUserDefaults.groupDefaults.object(forKey: UserDefaultsStore.Keys.customMoodTint.rawValue) as? Data{
             do {
@@ -226,11 +223,10 @@ class UserDefaultsStore {
         do {
             let data = try JSONEncoder().encode(customTint)
             GroupUserDefaults.groupDefaults.set(data, forKey: UserDefaultsStore.Keys.customMoodTint.rawValue)
-            return UserDefaultsStore.getCustomMoodTint()
         } catch {
-            print(error)
-            fatalError("error saving")
+            print("Error saving custom mood tint: \(error)")
         }
+        return UserDefaultsStore.getCustomMoodTint()
     }
     
     @discardableResult