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/Views/HeaderStatsView.swift

@@ -19,9 +19,7 @@ struct HeaderStatsView : UIViewRepresentable {
     init(fakeData: Bool, backDays: Int, moodTint: [Color], textColor: Color) {
         self.moodTints = moodTint
         self.textColor = textColor
-        guard moodTints.count == 5 else {
-            fatalError("mood tint count dont match")
-        }
+        assert(moodTints.count == 5, "mood tint count should be 5")
         self.tmpHolderToMakeViewDiffefrent = Color.random()
         entries = [BarChartDataEntry]()
 
@@ -30,8 +28,10 @@ struct HeaderStatsView : UIViewRepresentable {
         if fakeData {
             moodEntries = DataController.shared.randomEntries(count: 10)
         } else {
-            var daysAgo = Calendar.current.date(byAdding: .day, value: -backDays, to: Date())!
-            daysAgo = Calendar.current.date(bySettingHour: 0, minute: 0, second: 0, of: daysAgo)!
+            guard let daysAgoDate = Calendar.current.date(byAdding: .day, value: -backDays, to: Date()),
+                  let daysAgo = Calendar.current.date(bySettingHour: 0, minute: 0, second: 0, of: daysAgoDate) else {
+                return
+            }
 
             moodEntries = DataController.shared.getData(startDate: daysAgo, endDate: Date(), includedDays: [1,2,3,4,5,6,7])
         }