Enable CloudKit sync for Watch app and fix WCSession handling

- Watch now uses CloudKit for data persistence (syncs automatically with iPhone)
- Added iCloud/CloudKit entitlements to Watch app (debug and release)
- Fixed WCSession delegate to handle messages with reply handler
- Watch UI now shows "Already Rated" screen after voting
- Invalidate LiveActivityScheduler cache when mood is logged
- WCSession now used only for immediate UI updates, not data persistence

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

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

Shared/Persisence/ExtensionDataProvider.swift

@@ -3,7 +3,8 @@
 //  Feels
 //
 //  Unified data provider for Widget and Watch extensions.
-//  Uses App Group container with CloudKit disabled for extension safety.
+//  - Watch: Uses CloudKit for automatic sync with iPhone
+//  - Widget: Uses local App Group storage (widgets can't use CloudKit)
 //
 //  Add this file to: FeelsWidgetExtension, Feels Watch App
 //
@@ -14,7 +15,8 @@ import WidgetKit
 import os.log
 
 /// Unified data provider for Widget and Watch extensions
-/// Uses its own ModelContainer with App Group storage (no CloudKit)
+/// - Watch: Uses CloudKit for automatic sync with iPhone (no WCSession needed for data)
+/// - Widget: Uses local App Group storage (widgets can't use CloudKit)
 @MainActor
 final class ExtensionDataProvider {
 
@@ -40,11 +42,31 @@ final class ExtensionDataProvider {
         // Try to use shared app group container
         do {
             let storeURL = try getStoreURL()
+
+            #if os(watchOS)
+            // Watch uses CloudKit for automatic sync with iPhone
+            let cloudKitContainerID: String
+            #if DEBUG
+            cloudKitContainerID = "iCloud.com.tt.feelsDebug"
+            #else
+            cloudKitContainerID = "iCloud.com.tt.feels"
+            #endif
+
             let configuration = ModelConfiguration(
                 schema: schema,
                 url: storeURL,
-                cloudKitDatabase: .none // Extensions don't sync directly
+                cloudKitDatabase: .private(cloudKitContainerID)
             )
+            Self.logger.info("Watch using CloudKit container: \(cloudKitContainerID)")
+            #else
+            // Widget uses local storage only (can't use CloudKit)
+            let configuration = ModelConfiguration(
+                schema: schema,
+                url: storeURL,
+                cloudKitDatabase: .none
+            )
+            #endif
+
             return try ModelContainer(for: schema, configurations: [configuration])
         } catch {
             Self.logger.warning("Falling back to in-memory storage: \(error.localizedDescription)")