feat: AccountListView 和 DownloadPanelView 增加错误提示和复制按钮

apps/macos/VODManager/Sources/VODManager/Views/AccountListView.swift

@@ -6,6 +6,7 @@ struct AccountListView: View {
     @Query(sort: \Account.createdAt, order: .reverse) private var accounts: [Account]
     @State private var showForm = false
     @State private var editingAccount: Account?
+    @State private var errorMessage: String?
 
     var body: some View {
         VStack {
@@ -19,6 +20,23 @@ struct AccountListView: View {
             }
             .padding()
 
+            if let error = errorMessage {
+                HStack {
+                    Text(error)
+                        .foregroundStyle(.red)
+                    Button {
+                        NSPasteboard.general.clearContents()
+                        NSPasteboard.general.setString(error, forType: .string)
+                    } label: {
+                        Image(systemName: "doc.on.doc")
+                    }
+                    .buttonStyle(.borderless)
+                    .help("复制错误信息")
+                    Spacer()
+                }
+                .padding(.horizontal)
+            }
+
             List(accounts) { account in
                 HStack {
                     VStack(alignment: .leading) {

apps/macos/VODManager/Sources/VODManager/Views/DownloadPanelView.swift

@@ -8,6 +8,7 @@ struct DownloadPanelView: View {
     @State private var selectedDefinitions: [String: String] = [:]
     @State private var downloadDirectory: URL?
     @State private var isDownloading = false
+    @State private var errorMessage: String?
 
     var body: some View {
         VStack(alignment: .leading, spacing: 16) {
@@ -49,6 +50,23 @@ struct DownloadPanelView: View {
                 }
             }
 
+            if let error = errorMessage {
+                HStack {
+                    Text(error)
+                        .foregroundStyle(.red)
+                    Button {
+                        NSPasteboard.general.clearContents()
+                        NSPasteboard.general.setString(error, forType: .string)
+                    } label: {
+                        Image(systemName: "doc.on.doc")
+                    }
+                    .buttonStyle(.borderless)
+                    .help("复制错误信息")
+                    Spacer()
+                }
+                .padding(.horizontal)
+            }
+
             HStack {
                 Spacer()
                 Button("取消") {