feat: 优化账号注销流程

suixinkanTests/StoreAccountDeregistrationViewModelTests.swift

@@ -267,6 +267,40 @@ final class StoreAccountDeregistrationViewModelTests: XCTestCase {
         XCTAssertFalse(model.canContinue)
     }
 
+    /// 验证码与原因在任何查询和提交意图之前校验；空白及超长原因不能触发网络请求。
+    func testSubmitRejectsMissingOrOversizedRequiredInputWithoutSideEffects() async throws {
+        let cases = [
+            (code: "", reason: "正常原因", message: "请输入收到的短信验证码"),
+            (code: "654321", reason: "", message: "请输入注销原因"),
+            (code: "654321", reason: "   \n", message: "请输入注销原因"),
+            (code: "654321", reason: String(repeating: "原", count: 51), message: "注销原因不能超过 50 个字")
+        ]
+        for item in cases {
+            let service = try DeregistrationServiceStub()
+            service.current = try StoreAccountDeregistrationFixtures.ready()
+            let suite = "DeregistrationRequiredReason.\(UUID().uuidString)"
+            let defaults = try XCTUnwrap(UserDefaults(suiteName: suite))
+            defer { defaults.removePersistentDomain(forName: suite) }
+            let store = StoreAccountDeregistrationSubmissionStore(
+                storeUserID: "101", environment: .testing, defaults: defaults
+            )
+            let model = StoreAccountDeregistrationViewModel(storeUserID: 101, submissionStore: store)
+            await model.refresh(api: service)
+            model.beginVerification()
+            let statusCount = service.statusCount
+            let eligibilityCount = service.eligibilityCount
+
+            await model.submit(smsCode: item.code, reason: item.reason, api: service)
+
+            XCTAssertEqual(model.errorMessage, item.message)
+            XCTAssertTrue(service.mutations.isEmpty)
+            XCTAssertEqual(service.statusCount, statusCount)
+            XCTAssertEqual(service.eligibilityCount, eligibilityCount)
+            XCTAssertFalse(model.submissionAttempted)
+            XCTAssertFalse(store.hasUnresolvedSubmission)
+        }
+    }
+
     /// 申请响应丢失可能已被服务端受理，不能直接重试或显示失败后可重新申请。
     func testLostApplyResponsePreventsAutomaticRetry() async throws {
         let service = try DeregistrationServiceStub()
@@ -285,8 +319,8 @@ final class StoreAccountDeregistrationViewModelTests: XCTestCase {
         XCTAssertEqual(model.step, .unresolvedRequest)
     }
 
-    /// 服务端明确拒绝验证码时允许重新核验，但不能保留之前的提交权限。
-    func testServerRejectionRequiresFreshEligibility() async throws {
+    /// 服务端明确拒绝验证码时保留已核验条件并停留在手机验证，不要求重新确认资产。
+    func testVerificationCodeRejectionStaysInVerification() async throws {
         let service = try DeregistrationServiceStub()
         service.current = try StoreAccountDeregistrationFixtures.ready()
         service.applyError = APIError.serverCode(100001, "验证码错误")
@@ -295,10 +329,10 @@ final class StoreAccountDeregistrationViewModelTests: XCTestCase {
         model.beginVerification()
         await model.submit(smsCode: "907182", reason: "不再使用", api: service)
         XCTAssertFalse(model.submissionAttempted)
-        XCTAssertFalse(model.canContinue)
-        XCTAssertEqual(model.errorMessage, "验证码错误")
-        await model.refresh(api: service)
         XCTAssertTrue(model.canContinue)
+        XCTAssertEqual(model.step, .verification)
+        XCTAssertNotNil(model.eligibility)
+        XCTAssertEqual(model.errorMessage, "验证码错误")
     }
 
     /// 展示全部真实阻断项，初始加载不会调用任何修改接口。
@@ -471,15 +505,19 @@ private final class DeregistrationServiceStub: StoreAccountDeregistrationServing
     var readError: Error?
     var applyError: Error?
     var mutations: [String] = []
+    var eligibilityCount = 0
+    var statusCount = 0
     var lastCode: String?
     var lastReason: String?
 
     init() throws { current = try StoreAccountDeregistrationFixtures.eligibility() }
     func eligibility() async throws -> StoreAccountDeregistrationEligibility {
+        eligibilityCount += 1
         if let readError { throw readError }
         return current
     }
     func status() async throws -> StoreAccountDeregistrationStatus {
+        statusCount += 1
         if let readError { throw readError }
         return currentStatus
     }