Add AI-powered mental wellness features: Reflection Companion, Pattern Tags, Weekly Digest

Three new Foundation Models features to deepen user engagement with mental wellness:

1. AI Reflection Companion — personalized feedback after completing guided reflections,
   referencing the user's actual words with personality-pack-adapted tone
2. Mood Pattern Tags — auto-extracts theme tags (work, family, stress, etc.) from notes
   and reflections, displayed as colored pills on entries
3. Weekly Emotional Digest — BGTask-scheduled Sunday digest with headline, summary,
   highlight, and intention; shown as card in Insights tab with notification

All features: on-device (zero cost), premium-gated, iOS 26+ with graceful degradation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Shared/Views/InsightsView/InsightsView.swift

@@ -24,6 +24,8 @@ struct InsightsView: View {
     @EnvironmentObject var iapManager: IAPManager
     @State private var showSubscriptionStore = false
     @State private var selectedTab: InsightsTab = .insights
+    @State private var weeklyDigest: WeeklyDigest?
+    @State private var showDigest = true
 
     var body: some View {
         VStack(spacing: 0) {
@@ -94,15 +96,34 @@ struct InsightsView: View {
         .onAppear {
             AnalyticsManager.shared.trackScreen(.insights)
             viewModel.generateInsights()
+            loadWeeklyDigest()
         }
         .padding(.top)
     }
 
     // MARK: - Insights Content
 
+    private func loadWeeklyDigest() {
+        if #available(iOS 26, *), !iapManager.shouldShowPaywall {
+            if let digest = FoundationModelsDigestService.shared.loadLatestDigest(),
+               digest.isFromCurrentWeek,
+               !WeeklyDigest.isDismissed(for: digest) {
+                weeklyDigest = digest
+                showDigest = true
+            }
+        }
+    }
+
     private var insightsContent: some View {
         ScrollView {
             VStack(spacing: 20) {
+                // Weekly Digest Card
+                if showDigest, let digest = weeklyDigest {
+                    WeeklyDigestCardView(digest: digest) {
+                        showDigest = false
+                    }
+                }
+
                 // This Month Section
                 InsightsSectionView(
                     title: "This Month",