Add premium features and reorganize Settings tab

Premium Features:
- Journal notes and photo attachments for mood entries
- Data export (CSV and PDF reports)
- Privacy lock with Face ID/Touch ID
- Apple Health integration for mood correlation
- 4 new personality packs (Motivational Coach, Zen Master, Best Friend, Data Analyst)

Settings Tab Reorganization:
- Combined Customize and Settings into single tab with segmented control
- Added upgrade banner with trial countdown above segment
- "Why Upgrade?" sheet showing all premium benefits
- Subscribe button opens improved StoreKit 2 subscription view

UI Improvements:
- Enhanced subscription store with feature highlights
- Entry detail view for viewing/editing notes and photos
- Removed duplicate subscription banners from tab content

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

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

Shared/Views/InsightsView/InsightsViewModel.swift

@@ -44,6 +44,7 @@ class InsightsViewModel: ObservableObject {
     // MARK: - Dependencies
 
     private let insightService = FoundationModelsInsightService()
+    private let healthService = HealthService.shared
     private let calendar = Calendar.current
 
     // MARK: - Initialization
@@ -148,11 +149,28 @@ class InsightsViewModel: ObservableObject {
 
         updateState(.loading)
 
+        // Fetch health data if enabled
+        var healthCorrelations: [HealthCorrelation] = []
+        if healthService.isEnabled && healthService.isAuthorized {
+            let healthData = await healthService.fetchHealthData(for: validEntries)
+            let correlations = healthService.analyzeCorrelations(entries: validEntries, healthData: healthData)
+
+            // Convert to HealthCorrelation format
+            healthCorrelations = correlations.map {
+                HealthCorrelation(
+                    metric: $0.metric,
+                    insight: $0.insight,
+                    correlation: $0.correlation
+                )
+            }
+        }
+
         do {
             let insights = try await insightService.generateInsights(
                 for: validEntries,
                 periodName: periodName,
-                count: 5
+                count: 5,
+                healthCorrelations: healthCorrelations
             )
             updateInsights(insights)
             updateState(.loaded)