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/FeelsApp.swift

@@ -25,7 +25,7 @@ struct FeelsApp: App {
         BGTaskScheduler.shared.register(forTaskWithIdentifier: BGTask.updateDBMissingID, using: nil) { (task) in
             BGTask.runFillInMissingDatesTask(task: task as! BGProcessingTask)
         }
-        UIApplication.shared.applicationIconBadgeNumber = 0
+        UNUserNotificationCenter.current().setBadgeCount(0)
     }
 
     var body: some Scene {
@@ -46,14 +46,14 @@ struct FeelsApp: App {
                     showSubscriptionFromWidget = true
                 }
             }
-        }.onChange(of: scenePhase) { phase in
-            if phase == .background {
+        }.onChange(of: scenePhase) { _, newPhase in
+            if newPhase == .background {
                 //BGTask.scheduleBackgroundProcessing()
                 WidgetCenter.shared.reloadAllTimelines()
             }
 
-            if phase == .active {
-                UIApplication.shared.applicationIconBadgeNumber = 0
+            if newPhase == .active {
+                UNUserNotificationCenter.current().setBadgeCount(0)
                 // Check subscription status on each app launch
                 Task {
                     await iapManager.checkSubscriptionStatus()