feat: 优化账号注销流程

suixinkan/Features/AccountDeletion/ViewModels/StoreAccountDeregistrationViewModel.swift

@@ -23,6 +23,8 @@ final class StoreAccountDeregistrationViewModel {
     private(set) var submissionAttempted = false
     /// 成功响应仅代表申请已提交，不代表账号注销完成。
     private(set) var submissionAccepted = false
+    /// 申请明确受理后，以当前凭证只读查询到的冷静期截止时间；查询失败不改变受理结果。
+    private(set) var submittedCoolingUntil: String?
     private let storeUserID: Int
     private let submissionStore: (any StoreAccountDeregistrationSubmissionTracking)?
     private var previousCancellationFingerprint: String?
@@ -179,20 +181,42 @@ final class StoreAccountDeregistrationViewModel {
         } catch { invalidate(error); return false }
     }
 
-    /// 校验输入后申请；服务端明确接受即交由页面退出，不再查询状态或推断正式完成。
+    /// 同步校验验证码与必填原因；失败时不启动查询、持久化或申请请求。
+    @discardableResult
+    func validateSubmissionInput(smsCode: String, reason: String) -> Bool {
+        let code = smsCode.trimmingCharacters(in: .whitespacesAndNewlines)
+        let reason = reason.trimmingCharacters(in: .whitespacesAndNewlines)
+        if code.isEmpty {
+            errorMessage = "请输入收到的短信验证码"
+            return false
+        }
+        if reason.isEmpty {
+            errorMessage = "请输入注销原因"
+            return false
+        }
+        if reason.count > 50 {
+            errorMessage = "注销原因不能超过 50 个字"
+            return false
+        }
+        errorMessage = nil
+        return true
+    }
+
+    /// 校验输入后申请；服务端明确接受后只读查询一次冷静期截止时间，再交由页面退出。
     func submit(smsCode: String, reason: String, api: any StoreAccountDeregistrationServing) async {
         guard canContinue, step == .verification else { return }
         let code = smsCode.trimmingCharacters(in: .whitespacesAndNewlines)
         let reason = reason.trimmingCharacters(in: .whitespacesAndNewlines)
-        guard !code.isEmpty, !reason.isEmpty else {
-            errorMessage = "请输入收到的短信验证码和注销原因"
-            return
-        }
+        guard validateSubmissionInput(smsCode: code, reason: reason) else { return }
+        var verifiedEligibility: StoreAccountDeregistrationEligibility?
+        var verifiedStatus: StoreAccountDeregistrationStatus?
         isBusy = true
         errorMessage = nil
         defer { isBusy = false }
         do {
             try await checkReady(api: api)
+            verifiedEligibility = eligibility
+            verifiedStatus = status
             previousCancellationFingerprint = status?.cancellationFingerprint
             try submissionStore?.recordSubmissionIntent(previousStatus: status)
             submissionAttempted = true
@@ -200,7 +224,21 @@ final class StoreAccountDeregistrationViewModel {
             eligibility = nil
             try await api.apply(smsCode: code, reason: reason)
             submissionAccepted = true
+            // 申请成功已经成立；状态查询只用于结果页展示，失败或尚未进入冷静期都不能推翻成功响应。
+            if let acceptedStatus = try? await api.status(), acceptedStatus.isCooling {
+                status = acceptedStatus
+                submittedCoolingUntil = acceptedStatus.coolingUntil
+            }
         } catch {
+            if !submissionAccepted, isVerificationCodeRejection(error) {
+                submissionStore?.clearRejectedSubmission()
+                submissionAttempted = false
+                eligibility = verifiedEligibility
+                status = verifiedStatus
+                step = .verification
+                errorMessage = error.localizedDescription
+                return
+            }
             // 业务码明确拒绝申请时可重新核验；网络/解码错误不能证明服务端没有收到申请。
             if !submissionAccepted, case APIError.serverCode = error {
                 submissionStore?.clearRejectedSubmission()
@@ -211,6 +249,14 @@ final class StoreAccountDeregistrationViewModel {
         }
     }
 
+    /// 旧接口没有独立错误码，验证码拒绝只能按服务端业务提示识别。
+    private func isVerificationCodeRejection(_ error: Error) -> Bool {
+        guard case let APIError.serverCode(_, message) = error else { return false }
+        return message.localizedCaseInsensitiveContains("验证码")
+            || message.localizedCaseInsensitiveContains("verification code")
+            || message.localizedCaseInsensitiveContains("sms code")
+    }
+
     private func checkReady(api: any StoreAccountDeregistrationServing) async throws {
         try await reload(api: api)
         guard status?.permitsPreparation == true, eligibility?.permitsApplication == true else {