Add monthly check-in sharing

PortfolioJournal/Services/ShareService.swift

@@ -6,6 +6,29 @@ class ShareService {
 
     private init() {}
 
+    func shareText(_ content: String) {
+        guard let viewController = ShareService.topViewController() else { return }
+
+        let activityVC = UIActivityViewController(
+            activityItems: [content],
+            applicationActivities: nil
+        )
+
+        if let popover = activityVC.popoverPresentationController {
+            popover.sourceView = viewController.view
+            popover.sourceRect = CGRect(
+                x: viewController.view.bounds.midX,
+                y: viewController.view.bounds.midY,
+                width: 0,
+                height: 0
+            )
+        }
+
+        DispatchQueue.main.async {
+            viewController.present(activityVC, animated: true)
+        }
+    }
+
     func shareTextFile(content: String, fileName: String) {
         guard let viewController = ShareService.topViewController() else { return }
 

PortfolioJournal/Views/Dashboard/MonthlyCheckInView.swift

@@ -73,6 +73,15 @@ struct MonthlyCheckInView: View {
         }
         .navigationTitle("Monthly Check-in")
         .navigationBarTitleDisplayMode(.inline)
+        .toolbar {
+            ToolbarItem(placement: .navigationBarTrailing) {
+                Button {
+                    shareMonthlyCheckIn()
+                } label: {
+                    Image(systemName: "square.and.arrow.up")
+                }
+            }
+        }
         .onAppear {
             viewModel.selectedAccount = accountStore.selectedAccount
             viewModel.showAllAccounts = accountStore.showAllAccounts
@@ -444,6 +453,30 @@ struct MonthlyCheckInView: View {
         .cornerRadius(AppConstants.UI.cornerRadius)
         .shadow(color: .black.opacity(0.05), radius: 8, y: 2)
     }
+
+    private func shareMonthlyCheckIn() {
+        let summary = viewModel.monthlySummary
+        let text = """
+        \(summary.periodLabel) Check-in
+        Starting: \(summary.formattedStartingValue)
+        Ending: \(summary.formattedEndingValue)
+        Contributions: \(summary.formattedContributions)
+        Net performance: \(summary.formattedNetPerformance) (\(summary.formattedNetPerformancePercentage))
+
+        Shared from \(appDisplayName)
+        """
+        ShareService.shared.shareText(text)
+    }
+
+    private var appDisplayName: String {
+        if let name = Bundle.main.object(forInfoDictionaryKey: "CFBundleDisplayName") as? String {
+            return name
+        }
+        if let name = Bundle.main.object(forInfoDictionaryKey: "CFBundleName") as? String {
+            return name
+        }
+        return "Portfolio Journal"
+    }
 }
 
 struct AchievementsView: View {