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/GuidedReflectionView.swift

@@ -24,6 +24,8 @@ struct GuidedReflectionView: View {
     @State private var isSaving = false
     @State private var showDiscardAlert = false
     @State private var showInfoSheet = false
+    @State private var showFeedback = false
+    @State private var savedReflection: GuidedReflection?
 
     private let initialDraft: GuidedReflectionDraft
 
@@ -77,8 +79,24 @@ struct GuidedReflectionView: View {
 
     var body: some View {
         NavigationStack {
-            ScrollViewReader { proxy in
-                reflectionSheetContent(with: proxy)
+            ZStack {
+                ScrollViewReader { proxy in
+                    reflectionSheetContent(with: proxy)
+                }
+                .blur(radius: showFeedback ? 6 : 0)
+                .allowsHitTesting(!showFeedback)
+
+                if showFeedback, let savedReflection {
+                    Color.black.opacity(0.3)
+                        .ignoresSafeArea()
+                        .onTapGesture { }
+
+                    ReflectionFeedbackView(
+                        mood: entry.mood,
+                        reflection: savedReflection,
+                        onDismiss: { dismiss() }
+                    )
+                }
             }
         }
     }
@@ -454,7 +472,22 @@ struct GuidedReflectionView: View {
         )
 
         if success {
-            dismiss()
+            // Fire-and-forget tag extraction
+            if #available(iOS 26, *), !IAPManager.shared.shouldShowPaywall {
+                Task {
+                    await FoundationModelsTagService.shared.extractAndSaveTags(for: entry)
+                }
+            }
+
+            // Show AI feedback if reflection is complete and AI is potentially available
+            if reflection.isComplete {
+                savedReflection = reflection
+                withAnimation(.easeInOut(duration: 0.3)) {
+                    showFeedback = true
+                }
+            } else {
+                dismiss()
+            }
         } else {
             isSaving = false
         }