fix: 修复账号表单输入框无法输入的问题

- 将 Form 替换为 VStack + roundedBorder TextField

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

@@ -81,12 +81,26 @@ struct AccountFormView: View {
             Text(account == nil ? "添加账号" : "编辑账号")
                 .font(.title2)
 
-            Form {
-                TextField("名称", text: $name)
-                TextField("AccessKey ID", text: $accessKeyId)
-                SecureField(account == nil ? "AccessKey Secret" : "AccessKey Secret（留空则不修改）", text: $accessKeySecret)
-                TextField("Region", text: $region)
-                TextField("Endpoint（可选）", text: $endpoint)
+            VStack(alignment: .leading, spacing: 12) {
+                Text("名称")
+                TextField("用于区分不同账号", text: $name)
+                    .textFieldStyle(.roundedBorder)
+
+                Text("AccessKey ID")
+                TextField("如 LTAI...", text: $accessKeyId)
+                    .textFieldStyle(.roundedBorder)
+
+                Text(account == nil ? "AccessKey Secret" : "AccessKey Secret（留空则不修改）")
+                SecureField("如 8fKx...", text: $accessKeySecret)
+                    .textFieldStyle(.roundedBorder)
+
+                Text("Region")
+                TextField("如 cn-shanghai", text: $region)
+                    .textFieldStyle(.roundedBorder)
+
+                Text("Endpoint（可选）")
+                TextField("默认 vod.{region}.aliyuncs.com", text: $endpoint)
+                    .textFieldStyle(.roundedBorder)
             }
 
             HStack {
@@ -101,7 +115,7 @@ struct AccountFormView: View {
             }
         }
         .padding()
-        .frame(minWidth: 400)
+        .frame(minWidth: 450)
         .onAppear {
             if let account = account {
                 name = account.name