Integrate share capability

mobile/Heygo/Views/LinkDetailView.swift

@@ -9,6 +9,23 @@ struct LinkDetailView: View {
     @State private var showingEdit = false
     @State private var templateParameters: [String: String] = [:]
     @State private var showingTemplateDialog = false
+    @State private var showingShareSheet = false
+
+    private var shareItems: [Any] {
+        var items: [Any] = []
+
+        // Add the alias and URL for link/template types
+        if link.linkTypeEnum == .link || link.linkTypeEnum == .template {
+            if let url = link.originalURL, !url.isEmpty {
+                items.append("\(link.alias): \(url)")
+                items.append(URL(string: url) ?? url)
+            } else {
+                items.append(link.alias)
+            }
+        }
+
+        return items
+    }
 
     enum TimeRange: String, CaseIterable {
         case threeMonths = "3m"
@@ -141,6 +158,9 @@ struct LinkDetailView: View {
                 }
             )
         }
+        .sheet(isPresented: $showingShareSheet) {
+            ShareSheet(activityItems: shareItems)
+        }
     }
 
     private var headerSection: some View {
@@ -341,6 +361,15 @@ struct LinkDetailView: View {
 
     private var toolbarMenu: some View {
         Menu {
+            // Share button for link and template types (not for custom)
+            if link.linkTypeEnum == .link || link.linkTypeEnum == .template {
+                Button(action: {
+                    showingShareSheet = true
+                }) {
+                    Label("Share", systemImage: "square.and.arrow.up")
+                }
+            }
+
             Button("edit") {
                 showingEdit = true
             }

mobile/Heygo/Views/LinkListView.swift

@@ -425,6 +425,21 @@ struct MarkdownContentView: View {
     @Environment(\.presentationMode) var presentationMode
     @EnvironmentObject var linkViewModel: LinkViewModel
     @State private var showingEditLink = false
+    @State private var showingShareSheet = false
+
+    private var shareItems: [Any] {
+        var items: [Any] = []
+
+        // Add the alias as title
+        items.append("Custom Content: \(link.alias)")
+
+        // Add the markdown content if available
+        if let content = link.text, !content.isEmpty {
+            items.append(content)
+        }
+
+        return items
+    }
 
     var body: some View {
         NavigationView {
@@ -472,15 +487,39 @@ struct MarkdownContentView: View {
                     }
                 }
                 ToolbarItem(placement: .navigationBarTrailing) {
+                    HStack(spacing: 16) {
+                        Button(action: {
+                            showingShareSheet = true
+                        }) {
+                            Image(systemName: "square.and.arrow.up")
+                        }
+
                         Button("Done") {
                             presentationMode.wrappedValue.dismiss()
                         }
                     }
                 }
+            }
             .sheet(isPresented: $showingEditLink) {
                 LinkFormView(link: link)
                     .environmentObject(linkViewModel)
             }
+            .sheet(isPresented: $showingShareSheet) {
+                ShareSheet(activityItems: shareItems)
             }
         }
     }
+}
+
+struct ShareSheet: UIViewControllerRepresentable {
+    let activityItems: [Any]
+
+    func makeUIViewController(context: Context) -> UIActivityViewController {
+        let controller = UIActivityViewController(activityItems: activityItems, applicationActivities: nil)
+        return controller
+    }
+
+    func updateUIViewController(_ uiViewController: UIActivityViewController, context: Context) {
+        // No updates needed
+    }
+}