refactor: 原生 Mac 应用直接使用内置下载，移除浏览器/下载工具选项

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

@@ -8,7 +8,6 @@ struct DownloadPanelView: View {
     @State private var selectedDefinitions: [String: String] = [:]
     @State private var downloadDirectory: URL?
     @State private var isDownloading = false
-    @State private var showToolsHelp = false
 
     var body: some View {
         VStack(alignment: .leading, spacing: 16) {
@@ -51,20 +50,14 @@ struct DownloadPanelView: View {
             }
 
             HStack {
-                Button("使用下载工具") {
-                    showToolsHelp = true
-                }
-                .disabled(isDownloading)
-
                 Spacer()
-
                 Button("取消") {
                     dismiss()
                 }
                 .disabled(isDownloading)
 
-                Button("浏览器下载") {
-                    Task { await startBrowserDownloads() }
+                Button("开始下载") {
+                    Task { await startDownloads() }
                 }
                 .disabled(downloadDirectory == nil || isDownloading)
                 .buttonStyle(.borderedProminent)
@@ -81,9 +74,6 @@ struct DownloadPanelView: View {
             }
             selectedDefinitions = defs
         }
-        .sheet(isPresented: $showToolsHelp) {
-            DownloadToolsHelpView(items: items, selectedDefinitions: selectedDefinitions)
-        }
     }
 
     private func selectDirectory() {
@@ -97,7 +87,7 @@ struct DownloadPanelView: View {
         }
     }
 
-    private func startBrowserDownloads() async {
+    private func startDownloads() async {
         guard let directory = downloadDirectory else { return }
         isDownloading = true
 
@@ -127,75 +117,3 @@ struct DownloadPanelView: View {
         return String(format: "%.2f %@", size, units[i])
     }
 }
-
-struct DownloadToolsHelpView: View {
-    let items: [(video: VideoItem, playInfos: [PlayInfo])]
-    let selectedDefinitions: [String: String]
-    @Environment(\.dismiss) private var dismiss
-
-    var selectedURLs: [String] {
-        items.compactMap { item -> String? in
-            guard let definition = selectedDefinitions[item.video.videoId] else { return nil }
-            return item.playInfos.first(where: { $0.definition == definition })?.playURL
-        }
-    }
-
-    var wgetCommand: String {
-        selectedURLs.map { "wget \"\($0)\"" }.joined(separator: "\n")
-    }
-
-    var aria2Command: String {
-        selectedURLs.map { "aria2c \"\($0)\"" }.joined(separator: "\n")
-    }
-
-    var body: some View {
-        VStack(alignment: .leading, spacing: 16) {
-            Text("使用下载工具")
-                .font(.title2)
-
-            Text("浏览器对批量下载限制较多，推荐使用 aria2 或 wget 等命令行工具。先点击下方按钮复制全部链接，再粘贴到终端执行。")
-                .foregroundStyle(.secondary)
-
-            HStack {
-                Button("复制全部链接") {
-                    let pasteboard = NSPasteboard.general
-                    pasteboard.clearContents()
-                    pasteboard.setString(selectedURLs.joined(separator: "\n"), forType: .string)
-                }
-                Spacer()
-                Button("关闭") {
-                    dismiss()
-                }
-            }
-
-            Text("aria2 示例（推荐）")
-                .font(.headline)
-            Text("aria2 支持断点续传、多线程下载，适合大文件。")
-                .font(.caption)
-                .foregroundStyle(.secondary)
-            ScrollView {
-                Text(aria2Command)
-                    .font(.system(.caption, design: .monospaced))
-                    .padding(8)
-                    .frame(maxWidth: .infinity, alignment: .leading)
-                    .background(Color(.textBackgroundColor))
-                    .cornerRadius(6)
-            }
-            .frame(maxHeight: 120)
-
-            Text("wget 示例")
-                .font(.headline)
-            ScrollView {
-                Text(wgetCommand)
-                    .font(.system(.caption, design: .monospaced))
-                    .padding(8)
-                    .frame(maxWidth: .infinity, alignment: .leading)
-                    .background(Color(.textBackgroundColor))
-                    .cornerRadius(6)
-            }
-            .frame(maxHeight: 120)
-        }
-        .padding()
-        .frame(minWidth: 500, minHeight: 400)
-    }
-}