Add Apple Watch companion app with complications and WCSession sync

- Add watchOS app target with mood voting UI (5 mood buttons)
- Add WidgetKit complications (circular, corner, inline, rectangular)
- Add WatchConnectivityManager for bidirectional sync between iOS and watch
- iOS app acts as central coordinator - all mood logging flows through MoodLogger
- Watch votes send to iPhone via WCSession, iPhone logs and notifies watch back
- Widget votes use openAppWhenRun=true to run MoodLogger in main app process
- Add #if !os(watchOS) guards to Mood.swift and Random.swift for compatibility
- Update SKStoreReviewController to AppStore.requestReview (iOS 18 deprecation fix)
- Watch reads user's moodImages preference from GroupUserDefaults for emoji style

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

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

Shared/Models/MoodEntryModel.swift

@@ -27,16 +27,16 @@ enum EntryType: Int, Codable {
 
 @Model
 final class MoodEntryModel {
-    // Primary attributes
-    var forDate: Date
-    var moodValue: Int
-    var timestamp: Date
-    var weekDay: Int
-    var entryType: Int
+    // Primary attributes - CloudKit requires default values
+    var forDate: Date = Date()
+    var moodValue: Int = 0
+    var timestamp: Date = Date()
+    var weekDay: Int = 1
+    var entryType: Int = 0
 
-    // Metadata
-    var canEdit: Bool
-    var canDelete: Bool
+    // Metadata - CloudKit requires default values
+    var canEdit: Bool = true
+    var canDelete: Bool = true
 
     // Journal & Media (NEW)
     var notes: String?