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/SettingsView/SettingsView.swift

@@ -112,6 +112,7 @@ struct SettingsView: View {
                     defer { selectedFile.stopAccessingSecurityScopedResource() }
                     
                     var rows = input.components(separatedBy: "\n")
+                    guard !rows.isEmpty else { return }
                     rows.removeFirst()
                     for row in rows {
                         let stripped = row.replacingOccurrences(of: " +0000", with: "")
@@ -119,10 +120,12 @@ struct SettingsView: View {
                         if columns.count != 7 {
                             continue
                         }
-                        let forDate = dateFormatter.date(from: columns[3])!
-                        let moodValue = Int(columns[4])!
+                        guard let forDate = dateFormatter.date(from: columns[3]),
+                              let moodValue = Int(columns[4]) else {
+                            continue
+                        }
                         let mood = Mood(rawValue: moodValue) ?? .missing
-                        let entryType = EntryType(rawValue: Int(columns[2])!) ?? .listView
+                        let entryType = EntryType(rawValue: Int(columns[2]) ?? 0) ?? .listView
 
                         DataController.shared.add(mood: mood, forDate: forDate, entryType: entryType)
                     }
@@ -357,7 +360,7 @@ struct SettingsView: View {
                     Text(String(localized: "settings_use_cloudkit_title"))
                         .foregroundColor(textColor)
                 })
-                .onChange(of: useCloudKit) { newValue in
+                .onChange(of: useCloudKit) { _, newValue in
                     EventLogger.log(event: "toggle_use_cloudkit", withData: ["value": newValue])
                 }
                 .padding()
@@ -391,7 +394,7 @@ struct SettingsView: View {
             VStack {
                 Toggle(String(localized: "settings_use_delete_enable"),
                        isOn: $deleteEnabled)
-                .onChange(of: deleteEnabled) { newValue in
+                .onChange(of: deleteEnabled) { _, newValue in
                     EventLogger.log(event: "toggle_can_delete", withData: ["value": newValue])
                 }
                 .foregroundColor(textColor)