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/Services/ExportableInsightsViews.swift

@@ -4,8 +4,6 @@
 //
 //  Exportable insights views with sample AI-generated insights for screenshots.
 //
-
-#if DEBUG
 import SwiftUI
 
 // MARK: - Sample Insights Data
@@ -377,4 +375,3 @@ struct ExportableInsightsContainer<Content: View>: View {
             .background(backgroundColor)
     }
 }
-#endif

Shared/Services/ExportableWatchViews.swift

@@ -5,8 +5,6 @@
 //  Exportable watch views that match the real watchOS layouts.
 //  These views accept tint/icon configuration as parameters for batch export.
 //
-
-#if DEBUG
 import SwiftUI
 
 // MARK: - Watch Export Configuration
@@ -362,4 +360,3 @@ struct ExportableComplicationContainer<Content: View>: View {
             .clipShape(isCircular ? AnyShape(Circle()) : AnyShape(RoundedRectangle(cornerRadius: 12, style: .continuous)))
     }
 }
-#endif

Shared/Services/ExportableWidgetViews.swift

@@ -5,8 +5,6 @@
 //  Exportable widget views that match the real WidgetKit widgets pixel-for-pixel.
 //  These views accept tint/icon configuration as parameters for batch export.
 //
-
-#if DEBUG
 import SwiftUI
 
 // MARK: - Widget Theme Configuration
@@ -691,4 +689,3 @@ struct ExportableWidgetContainer<Content: View>: View {
             .clipShape(RoundedRectangle(cornerRadius: 24, style: .continuous))
     }
 }
-#endif

Shared/Services/InsightsExporter.swift

@@ -5,7 +5,6 @@
 //  Debug utility to export insights view screenshots with sample AI data.
 //
 
-#if DEBUG
 import SwiftUI
 import UIKit
 
@@ -100,4 +99,3 @@ class InsightsExporter {
         }
     }
 }
-#endif

Shared/Services/SharingScreenshotExporter.swift

@@ -5,7 +5,6 @@
 //  Debug utility to export sharing template screenshots.
 //
 
-#if DEBUG
 import SwiftUI
 import UIKit
 
@@ -173,4 +172,3 @@ class SharingScreenshotExporter {
         return false
     }
 }
-#endif

Shared/Services/WatchExporter.swift

@@ -6,7 +6,6 @@
 //  Uses the exportable watch views from ExportableWatchViews.swift.
 //
 
-#if DEBUG
 import SwiftUI
 import UIKit
 
@@ -247,4 +246,3 @@ class WatchExporter {
         }
     }
 }
-#endif

Shared/Services/WidgetExporter.swift

@@ -6,7 +6,6 @@
 //  Uses the real widget view layouts from ExportableWidgetViews.swift.
 //
 
-#if DEBUG
 import SwiftUI
 import UIKit
 
@@ -389,4 +388,3 @@ class WidgetExporter {
         }
     }
 }
-#endif