完善合作获客员备注名：保存时校验长度，弹窗展示 saler_real_name。

Co-authored-by: Cursor <cursoragent@cursor.com>

suixinkan/Features/CooperationOrder/ViewModels/CooperationAcquirerViewModel.swift

@@ -35,7 +35,10 @@ final class CooperationAcquirerViewModel: ObservableObject {
         api: CooperationOrderServing
     ) async throws {
         guard saleUserId > 0 else { return }
-        let trimmedRemark = remark.trimmingCharacters(in: .whitespacesAndNewlines)
+        if let message = CooperationOrderRemarkName.validationMessage(for: remark) {
+            throw CooperationOrderRemarkValidationError(message: message)
+        }
+        let trimmedRemark = CooperationOrderRemarkName.trimmed(remark)
         try await api.saleUserUpdateRemark(saleUserId: saleUserId, photogRemarkName: trimmedRemark)
         acquirers = acquirers.map { acquirer in
             guard acquirer.saleUserId == saleUserId else { return acquirer }
@@ -43,3 +46,10 @@ final class CooperationAcquirerViewModel: ObservableObject {
         }
     }
 }
+
+/// 合作获客员备注名校验失败错误。
+struct CooperationOrderRemarkValidationError: LocalizedError {
+    let message: String
+
+    var errorDescription: String? { message }
+}