Migrate from Core Data to SwiftData

- Replace Core Data with SwiftData for iOS 18+
- Create MoodEntryModel as @Model class replacing MoodEntry entity
- Create SharedModelContainer for App Group container sharing
- Create DataController with CRUD extensions replacing PersistenceController
- Update all views and view models to use MoodEntryModel
- Update widget extension to use SwiftData
- Remove old Core Data files (Persistence*.swift, .xcdatamodeld)
- Add EntryType enum with all entry type cases
- Fix widget label truncation with proper spacing and text scaling

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

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

Shared/Views/SharingTemplates/LongestStreakTemplate.swift

@@ -24,7 +24,7 @@ struct LongestStreakTemplate: View, SharingTemplate {
     var endDate: Date
     var fakeData: Bool
     
-    @State var moodEntries = [MoodEntry]()
+    @State var moodEntries = [MoodEntryModel]()
     @State var selectedMood: Mood = .great
     
     @State var showSharingTemplate = false
@@ -57,28 +57,29 @@ struct LongestStreakTemplate: View, SharingTemplate {
         return image
     }
     
+    @MainActor
     private func configureData(fakeData: Bool, mood: Mood) {
-        var _moodEntries: [MoodEntry]?
+        var _moodEntries: [MoodEntryModel]?
 
         if fakeData {
-            _moodEntries = PersistenceController.shared.randomEntries(count: 10)
+            _moodEntries = DataController.shared.randomEntries(count: 10)
         } else {
-            _moodEntries = PersistenceController.shared.getData(startDate:startDate,
-                                                                endDate: endDate,
-                                                                includedDays: [1,2,3,4,5,6,7])
+            _moodEntries = DataController.shared.getData(startDate:startDate,
+                                                         endDate: endDate,
+                                                         includedDays: [1,2,3,4,5,6,7])
         }
-        let data = _moodEntries ?? [MoodEntry]()
-        
+        let data = _moodEntries ?? [MoodEntryModel]()
+
         var splitArrays = createSubArrays(fromMoodEntries: data, splitOn: mood)
         splitArrays = splitArrays.sorted(by: {
             $0.count > $1.count
         } )
-        self.moodEntries = splitArrays.first ?? [MoodEntry]()
+        self.moodEntries = splitArrays.first ?? [MoodEntryModel]()
     }
-    
-    private func createSubArrays(fromMoodEntries: [MoodEntry], splitOn: Mood) -> [[MoodEntry]] {
-        var splitArrays = [[MoodEntry]]()
-        var currentSplit = [MoodEntry]()
+
+    private func createSubArrays(fromMoodEntries: [MoodEntryModel], splitOn: Mood) -> [[MoodEntryModel]] {
+        var splitArrays = [[MoodEntryModel]]()
+        var currentSplit = [MoodEntryModel]()
         for entry in fromMoodEntries {
             if entry.mood == splitOn {
                 currentSplit.append(entry)