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/Random.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 import SwiftUI
+import SwiftData
 
 struct Constants {
     static let groupShareId = "group.com.tt.ifeel"
@@ -70,25 +71,25 @@ class Random {
         return newValue
     }
     
-    static func createTotalPerc(fromEntries entries: [MoodEntry]) -> [MoodMetrics] {
+    static func createTotalPerc(fromEntries entries: [MoodEntryModel]) -> [MoodMetrics] {
         let filteredEntries = entries.filter({
             return ![.missing, .placeholder].contains($0.mood)
         })
         var returnData = [MoodMetrics]()
-        
+
         for (_, mood) in Mood.allValues.enumerated() {
             let moodEntries = filteredEntries.filter({
-                Int($0.moodValue) == mood.rawValue
+                $0.moodValue == mood.rawValue
             })
             let total = moodEntries.count
             let perc = (Float(total) / Float(filteredEntries.count)) * 100
             returnData.append(MoodMetrics(mood: mood, total: total, percent: perc))
         }
-        
+
         returnData = returnData.sorted(by: {
             $0.mood.rawValue > $1.mood.rawValue
         })
-        
+
         return returnData
     }
 }