fix: 修复账号编辑弹窗未回填原内容，改用 sheet(item:) 确保参数正确传入

apps/macos/VODManager/Sources/VODManager/Models/Models.swift

@@ -2,7 +2,7 @@ import Foundation
 import SwiftData
 
 @Model
-class Account {
+class Account: Identifiable {
     @Attribute(.unique) var id: UUID
     var name: String
     var accessKeyId: String
@@ -109,6 +109,22 @@ enum DownloadStatus: String, Codable {
     case pending, downloading, completed, failed
 }
 
+enum FileConflictStrategy: String, CaseIterable, Identifiable {
+    case skip
+    case overwrite
+    case rename
+
+    var id: String { rawValue }
+
+    var label: String {
+        switch self {
+        case .skip: return "跳过已存在文件"
+        case .overwrite: return "覆盖已有文件"
+        case .rename: return "自动重命名（加序号）"
+        }
+    }
+}
+
 struct VideoItem: Identifiable, Codable, Equatable {
     var id: String { videoId }
     var videoId: String

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

@@ -4,8 +4,8 @@ import SwiftData
 struct AccountListView: View {
     @EnvironmentObject var accountStore: AccountStore
     @Query(sort: \Account.createdAt, order: .reverse) private var accounts: [Account]
-    @State private var showForm = false
     @State private var editingAccount: Account?
+    @State private var showAddForm = false
     @State private var errorMessage: String?
 
     var body: some View {
@@ -13,8 +13,7 @@ struct AccountListView: View {
             HStack {
                 Spacer()
                 Button("添加账号") {
-                    editingAccount = nil
+                    showAddForm = true
-                    showForm = true
                 }
                 .buttonStyle(.borderedProminent)
             }
@@ -62,7 +61,6 @@ struct AccountListView: View {
 
                     Button("编辑") {
                         editingAccount = account
-                        showForm = true
                     }
                     .buttonStyle(.borderless)
 
@@ -75,8 +73,11 @@ struct AccountListView: View {
                 .padding(.vertical, 4)
             }
         }
-        .sheet(isPresented: $showForm) {
+        .sheet(item: $editingAccount) { account in
-            AccountFormView(account: editingAccount)
+            AccountFormView(account: account)
+        }
+        .sheet(isPresented: $showAddForm) {
+            AccountFormView(account: nil)
         }
     }
 }