Base fixes and test harness

PortfolioJournal/Views/Sources/SourceListView.swift

@@ -1,17 +1,21 @@
 import SwiftUI
+import CoreData
 
 struct SourceListView: View {
     @EnvironmentObject var iapService: IAPService
     @EnvironmentObject var accountStore: AccountStore
+    @Environment(\.managedObjectContext) private var context
     @StateObject private var viewModel: SourceListViewModel
     @AppStorage("calmModeEnabled") private var calmModeEnabled = true
+    @State private var sourceToDelete: InvestmentSource?
+    @State private var navigationPath = NavigationPath()
 
     init(iapService: IAPService) {
         _viewModel = StateObject(wrappedValue: SourceListViewModel(iapService: iapService))
     }
 
     var body: some View {
-        NavigationStack {
+        NavigationStack(path: $navigationPath) {
             ZStack {
                 AppBackground()
 
@@ -58,6 +62,36 @@ struct SourceListView: View {
             .onReceive(accountStore.$showAllAccounts) { showAll in
                 viewModel.showAllAccounts = showAll
             }
+            .navigationDestination(for: NSManagedObjectID.self) { objectID in
+                if let source = try? context.existingObject(with: objectID) as? InvestmentSource,
+                   !source.isDeleted {
+                    SourceDetailView(source: source, iapService: iapService)
+                } else {
+                    MissingSourceView()
+                }
+            }
+            .confirmationDialog(
+                "Delete Source",
+                isPresented: Binding(
+                    get: { sourceToDelete != nil },
+                    set: { if !$0 { sourceToDelete = nil } }
+                ),
+                titleVisibility: .visible
+            ) {
+                Button("Delete", role: .destructive) {
+                    if let source = sourceToDelete {
+                        viewModel.deleteSource(source)
+                        sourceToDelete = nil
+                    }
+                }
+                Button("Cancel", role: .cancel) {
+                    sourceToDelete = nil
+                }
+            } message: {
+                if let source = sourceToDelete {
+                    Text("This will permanently delete \(source.name) and all its snapshots.")
+                }
+            }
         }
     }
 
@@ -114,15 +148,19 @@ struct SourceListView: View {
 
             // Sources
             Section {
-                ForEach(viewModel.sources) { source in
-                    NavigationLink {
-                        SourceDetailView(source: source, iapService: iapService)
-                    } label: {
-                        SourceRowView(source: source, calmModeEnabled: calmModeEnabled)
-                    }
-                }
-                .onDelete { indexSet in
-                    viewModel.deleteSource(at: indexSet)
+                ForEach(viewModel.sources, id: \.objectID) { source in
+                    SourceRowView(source: source, calmModeEnabled: calmModeEnabled)
+                        .contentShape(Rectangle())
+                        .onTapGesture {
+                            navigationPath.append(source.objectID)
+                        }
+                        .swipeActions(edge: .trailing, allowsFullSwipe: false) {
+                            Button(role: .destructive) {
+                                sourceToDelete = source
+                            } label: {
+                                Label("Delete", systemImage: "trash")
+                            }
+                        }
                 }
             } header: {
                 if viewModel.isFiltered {
@@ -263,6 +301,22 @@ struct SourceListView: View {
     }
 }
 
+private struct MissingSourceView: View {
+    var body: some View {
+        VStack(spacing: 12) {
+            Image(systemName: "exclamationmark.triangle")
+                .font(.system(size: 42))
+                .foregroundColor(.secondary)
+            Text("Source not available")
+                .font(.headline)
+            Text("This source was deleted.")
+                .font(.subheadline)
+                .foregroundColor(.secondary)
+        }
+        .padding()
+    }
+}
+
 // MARK: - Source Row View
 
 struct SourceRowView: View {