Remove #if DEBUG guards for TestFlight, polish weekly digest and insights UX

- Remove #if DEBUG from all debug settings, exporters, and IAP bypass so
  debug options are available in TestFlight builds
- Weekly digest card: replace dismiss X with collapsible chevron caret
- Weekly digest: generate on-demand when opening Insights tab if no cached
  digest exists (BGTask + notification kept as bonus path)
- Fix digest intention text color (was .secondary, now uses theme textColor)
- Add "Generate Weekly Digest" debug button in Settings
- Add generating overlay on Insights tab with pulsing sparkles icon that
  stays visible until all sections finish loading (content at 0.2 opacity)

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

Shared/Views/SettingsView/SettingsView.swift

@@ -68,7 +68,6 @@ struct SettingsContentView: View {
                 privacyButton
                 analyticsToggle
 
-                #if DEBUG
                 // Debug section
                 debugSectionHeader
                 addTestDataButton
@@ -83,9 +82,9 @@ struct SettingsContentView: View {
                 exportInsightsButton
                 generateAndExportButton
                 deleteHealthKitDataButton
+                generateWeeklyDigestButton
 
                 clearDataButton
-                #endif
 
                 Spacer()
                     .frame(height: 20)
@@ -207,7 +206,6 @@ struct SettingsContentView: View {
 
     // MARK: - Debug Section
 
-    #if DEBUG
     private var debugSectionHeader: some View {
         HStack {
             Text("Debug")
@@ -759,6 +757,63 @@ struct SettingsContentView: View {
         .cornerRadius(Constants.viewsCornerRaidus, corners: [.topLeft, .topRight, .bottomLeft, .bottomRight])
     }
 
+    @State private var isGeneratingDigest = false
+    @State private var digestResult: String?
+
+    private var generateWeeklyDigestButton: some View {
+        Button {
+            isGeneratingDigest = true
+            digestResult = nil
+            Task {
+                if #available(iOS 26, *) {
+                    do {
+                        let digest = try await FoundationModelsDigestService.shared.generateWeeklyDigest()
+                        digestResult = "✓ \(digest.headline)"
+                    } catch {
+                        digestResult = "✗ \(error.localizedDescription)"
+                    }
+                } else {
+                    digestResult = "✗ Requires iOS 26+"
+                }
+                isGeneratingDigest = false
+            }
+        } label: {
+            HStack(spacing: 12) {
+                if isGeneratingDigest {
+                    ProgressView()
+                        .frame(width: 32)
+                } else {
+                    Image(systemName: "sparkles.rectangle.stack")
+                        .font(.title2)
+                        .foregroundColor(.purple)
+                        .frame(width: 32)
+                }
+
+                VStack(alignment: .leading, spacing: 2) {
+                    Text("Generate Weekly Digest")
+                        .foregroundColor(textColor)
+
+                    if let result = digestResult {
+                        Text(result)
+                            .font(.caption)
+                            .foregroundColor(result.contains("✓") ? .green : .red)
+                    } else {
+                        Text("Create AI digest now (shows in Insights tab)")
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                    }
+                }
+
+                Spacer()
+            }
+            .padding()
+        }
+        .disabled(isGeneratingDigest)
+        .background(theme.currentTheme.secondaryBGColor)
+        .fixedSize(horizontal: false, vertical: true)
+        .cornerRadius(Constants.viewsCornerRaidus, corners: [.topLeft, .topRight, .bottomLeft, .bottomRight])
+    }
+
     private var clearDataButton: some View {
         Button {
             MoodLogger.shared.deleteAllData()
@@ -787,7 +842,6 @@ struct SettingsContentView: View {
         .fixedSize(horizontal: false, vertical: true)
         .cornerRadius(Constants.viewsCornerRaidus, corners: [.topLeft, .topRight, .bottomLeft, .bottomRight])
     }
-    #endif
 
     // MARK: - Privacy Lock Toggle
 
@@ -1394,7 +1448,6 @@ struct SettingsView: View {
 //                    specialThanksCell
                 }
                 
-#if DEBUG
                 Group {
                     Divider()
                     Text("Test builds only")
@@ -1410,7 +1463,6 @@ struct SettingsView: View {
                     Divider()
                 }
                 Spacer()
-#endif
                 Text("\(Bundle.main.appName) v \(Bundle.main.versionNumber) (Build \(Bundle.main.buildNumber))")
                     .font(.body)
             }