docs: record one-click replacement contract and boundaries #258

docs/02-architecture-and-code-map.md

@@ -2,8 +2,8 @@
 generated: true (请先修改 Gitea Wiki，禁止直接编辑本文件)
 wiki_page: Architecture-and-Code-Map
 wiki_url: https://git.ilapage.cn/OPC/goauto/wiki/Architecture-and-Code-Map.-
-wiki_revision: 46a5f8234be2d55298779532058a0490a94d3167
-synchronized_at: 2026-09-10T03:36:58Z
+wiki_revision: 6c8866d6186d8d6cc022256f2f369cc3072e99b5
+synchronized_at: 2026-09-10T07:50:14Z
 <!-- gitea-wiki-mirror:end -->
 
 # 架构与代码地图
@@ -411,3 +411,12 @@ Web 唯一展示位置为“采集采购 → SYB 同步记录”：列表状态
 - 关联后读取现有采购准备；需要人工确认或不具备AI资格时停止自动链路并保留关联，其他情况调用原 AutoMatchMappings，沿用 #254 动态预算及原事务保存/上下文冲突保护。最后刷新实际处理阶段，不调用创建采购/订单接口。
 - 运行期间冻结行、商品、手机；前端重复主动作禁用，切换偏好仍只影响未来操作。卸载或 keep-alive deactivated 令旧操作失效，禁止旧回调继续下一步；不声称已经取消服务端在途写入。异常仅有限GET回读和刷新，不自动重发POST。
 - 验证命令：Server `go test -p 1 ./...`、`go build ./...`；Web `node --test tests/unit/syb-quick-link.test.cjs tests/unit/shopee-match-lifecycle.test.cjs`、`pnpm exec playwright test tests/e2e/syb-quick-link.spec.ts tests/e2e/shopee-match-lifecycle.spec.ts --workers=1`、受影响文件 ESLint、`pnpm build:prod`。SQLite 单连接并发测试不代替生产 MySQL 行锁验收；真实AI、生产数据、跨设备人工闭环待验证。
+
+## SYB 行内一键替换（#258）
+
+实现绑定 `2b01974`；部署与验收见 #258 发布证据。本节补充 #253，不改变原未关联入口。
+
+- `syb-products/quick-link.js` 复用分体按钮、设备偏好和匹配/回读流程；已关联且允许处理阶段时同位置显示一键替换。先只读预览，固定任务、目标商品及规格版本；不同商品一次确认，同商品不重绑。
+- `shopeeproduct/latest_collection.go` 在原 latestCollection 增加可选 replacement 模式。预览和提交均短事务锁定 SYB、Shopee、原PDD、设备、来源采集与目标PDD，核对旧关联及上下文。提交按预览 taskId 读取，不重新挑选后来采集的商品。
+- Admin 路由注入 `purchase.ValidateQuickReplacement`，在事务内复用采购准备数据集及处理阶段计算，不调用 AI。缺少校验函数拒绝替换；客户端密钥不注入且仍拒绝 latestCollection。无新路由、权限、表或迁移。
+- 关联完成后才执行现有 AI 匹配，不在数据库事务中等待 Provider；同一 SYB 正式采购创建与替换共用 SYB 行锁。历史采购快照不变。SQLite 合成测试覆盖冲突与串行并发请求，不能替代生产 MySQL 多连接锁验收。

docs/03-business-rules-and-glossary.md

@@ -2,8 +2,8 @@
 generated: true (请先修改 Gitea Wiki，禁止直接编辑本文件)
 wiki_page: Business-Rules-and-Glossary
 wiki_url: https://git.ilapage.cn/OPC/goauto/wiki/Business-Rules-and-Glossary.-
-wiki_revision: 31d2dbd24acd8ac119dfd0d538c12d0525a2764f
-synchronized_at: 2026-09-10T06:54:35Z
+wiki_revision: d016609062586a278560226600b5a1443c6fb442
+synchronized_at: 2026-09-10T07:50:17Z
 <!-- gitea-wiki-mirror:end -->
 
 # 业务规则与术语
@@ -560,3 +560,13 @@ Web 唯一展示位置为“采集采购 → SYB 同步记录”：列表状态
 - 先保存关联，再复用现有颜色/尺码自动匹配及保存。有效已确认映射保留；普通部分匹配保存合格结果，AI故障不提交本轮新映射，但已保存关联保留。后续可从“去匹配”或详情人工继续。failed 且无人工/AI确认时不能自动跳过人工解析；uncertain 不统一拦截，仍以原采购准备规则为准。
 - 操作完成不保证立即可采购，必须刷新现有处理阶段；缺规格、缺映射、解析需确认或其他原资格不满足时继续显示真实待处理阶段。不自动创建采购任务、不下单、不支付。
 - 请求超时/网络中断只做有限回读，不重复提交；读回失败明确结果未确认，避免无限转圈。离开页面不代表后端停止或回滚。普通用户沿用现有采购员权限，无新管理员专属开关。
+
+## SYB 已关联商品的一键替换（#258）
+
+实现绑定 `2b01974`；部署与验收见 #258 发布证据。
+
+- 复用一键关联及小箭头的位置，保留原查看 PDD 商品。PDD 待采集、采集失败、停用或缺价格的对应处理阶段可替换；采集中、已创建/运行采购、成功或结果未知不开放。服务端提交时再次检查，不能只相信按钮。
+- 复用每用户/浏览器/API环境的手机偏好；首次选择继续当前行，小箭头仅切换偏好。预览仅选所选手机最新 completed/completed_partial 临时采集，部分成功或不可用不回退旧商品。确认后固定来源任务和目标，不改用新采集；来源状态、设备、目标规格或旧关联改变时拒绝。
+- 不同商品显示一次确认，包含旧/新商品、手机和共享蝦皮档案影响；取消不写入。同商品不弹替换确认且不重写关联，只继续匹配。共享该蝦皮档案的 SYB 明细使用新关联，历史采购任务快照不改。
+- 沿用既有更换关联和有效映射检查，再复用自动匹配保存。部分匹配、AI失败或解析需人工处理时保留已保存关联，显示真实处理阶段，不保证立即可采购、不自动创建采购。
+- 网络异常只有限回读，区分目标商品、仍为原商品和其他关联，不把“已有某个关联”误报为本次替换成功；不自动重发写请求。没有新增后台作业、订单或付款操作。

docs/08-agent-api-contract.md

@@ -2,8 +2,8 @@
 generated: true (请先修改 Gitea Wiki，禁止直接编辑本文件)
 wiki_page: Android-Agent-API-Contract
 wiki_url: https://git.ilapage.cn/OPC/goauto/wiki/Android-Agent-API-Contract.-
-wiki_revision: 23160c055e8f6185a4108e284afc8216b41373e5
-synchronized_at: 2026-09-10T03:37:18Z
+wiki_revision: a96638c0b97eac622d53b04420da7ca35a1c010d
+synchronized_at: 2026-09-10T07:50:35Z
 <!-- gitea-wiki-mirror:end -->
 
 # MVP 共享 API 契约
@@ -1093,3 +1093,26 @@ requestId 沿用 UUID 约定，不增加批次表或全局幂等缓存。既有
 - `/api/client/v1/.../link-pdd` 带 latestCollection 时返回403 FORBIDDEN，不扩大API Key授权模块；原手动 pddProductId 模式行为不变。
 - Web 先GET详情及 #254 autoMatchTimeoutSeconds，再提交关联；关联响应中的冻结版本交给现有 auto-match。其匹配仍自动保存，无额外“保存修改”写请求。普通请求/回读每次10秒，auto-match 单独使用派生前端预算2T+20秒；业务拒绝直接提示，网络/匹配失败至多一次详情回读，再刷新准备状态，禁止自动POST重试。
 - Server/Web 需配套更新并包含 #254；无需迁移/Android升级。现有人工关联、匹配阈值、规格/采购资格、任务与支付边界不变。
+
+## Admin 一键替换最近采集候选（#258）
+
+实现绑定 `2b01974`；仅补充 Admin，Android/API Key 不变。沿用 `POST /api/admin/v1/shopee-products/{productId}/link-pdd` 和原权限，不新增路由或迁移。
+
+先请求只读预览（仍需 UUID requestId）：
+
+```json
+{"requestId":"UUID","latestCollection":{"sybProductId":1,"deviceId":2,"specContextVersion":"当前详情版本","replacement":{"preview":true,"expectedPddProductId":3}}}
+```
+
+响应 `product` 保持原关联，`collectionSource` 返回 taskId、deviceId、pddProductId、requiresSpecConfirmation，并增加 targetVersion、title、goodsId、previousTitle、previousGoodsId、deviceName。预览没有关联写入。
+
+确认提交沿用同一 SYB/设备/详情版本与原商品ID，replacement 改为：
+
+```json
+{"preview":false,"expectedPddProductId":3,"taskId":4,"targetPddProductId":5,"targetVersion":"预览返回值"}
+```
+
+- 提交按指定 taskId 核对临时采集来源、设备、completed/finishedAt、目标ID、可用规格及 targetVersion；不重新选择最新任务。旧关联、旧/目标规格版本变更返回现有409上下文冲突；阶段不再允许返回409 PDD_LINK_CONFLICT；来源不可用409 LATEST_COLLECTION_UNAVAILABLE；缺字段422。
+- 不同商品条件更新旧关联，返回更新后的 product.specContextVersion；同商品不更新关联及 last_update_request_id，但仍返回用于后续匹配的当前版本。请求不是持久化重放协议；客户端超时只回读、不自动重发。
+- 预览与提交都校验当前允许阶段；采集中拒绝。复用现有人工更换关联的映射语义，后续 auto-match 自动保存及预算沿用 #254。部分匹配/AI故障不回滚已提交关联。
+- 不提供 replacement 时 #253 行为不变；`/api/client/v1` 携带 latestCollection（包括 replacement）仍403，不扩大客户端密钥授权。

server/app/admin/router/init_router.go

@@ -63,7 +63,7 @@ func InitRouter() {
 	goautoproduct.InitRouter(r, authMiddleware)
 	goautoreplacement.InitRouter(r, authMiddleware)
 	goautorule.InitRouter(r, authMiddleware)
-	goautoshopeeproduct.InitRouter(r, authMiddleware)
+	goautoshopeeproduct.InitRouter(r, authMiddleware, goautopurchase.ValidateQuickReplacement)
 	goautosybimport.InitRouter(r, authMiddleware)
 	goautosybinnercode.InitRouter(r, authMiddleware)
 	goautosybshop.InitRouter(r, authMiddleware)

server/app/goauto/purchase/quick_replace.go

@@ -0,0 +1,44 @@
+package purchase
+
+import (
+	"context"
+
+	"go-admin/app/goauto/shopeeproduct"
+	"gorm.io/gorm"
+)
+
+// Called inside the link transaction, after locking the SYB and Shopee rows.
+// Reuse the authoritative stage calculation, without AI or task creation.
+func ValidateQuickReplacement(ctx context.Context, tx *gorm.DB, id uint64) error {
+	s := NewService(tx)
+	dataset, err := s.loadBatchPreviewDataset(ctx, []uint64{id})
+	if err != nil {
+		return err
+	}
+	guard, _, err := s.readOnlyPriceGuard(ctx)
+	if err != nil {
+		return err
+	}
+	preview := s.previewFromDataset(id, dataset, guard)
+	qualification := aiMatchQualificationForDataset(id, dataset)
+	preview.AIMatchEligible = qualification.Eligible
+	preview.AIMatchDisabledReason = qualification.DisabledReason
+	stage := processStageFromDataset(id, dataset, preview)
+	syb := dataset.sybByID[id]
+	disabled := false
+	if syb.ShopeeProductID != nil {
+		shopee := dataset.shopeeByID[*syb.ShopeeProductID]
+		if shopee.PDDProductID != nil {
+			pdd := dataset.pddByID[*shopee.PDDProductID]
+			disabled = pdd.Status == "disabled"
+			if _, active := dataset.activeCollectionByPDD[pdd.ID]; active {
+				return &shopeeproduct.ServiceError{Code: shopeeproduct.CodeLinkConflict, Message: "商品正在采集，请结束后刷新再操作"}
+			}
+		}
+	}
+	if stage.NextAction == "open_pdd" && (stage.Stage == ProcessStagePDDPending || stage.Stage == ProcessStagePDDCollectionFail ||
+		(stage.Stage == ProcessStageManualAction && (disabled || preview.ReasonCode == "PDD_PRICE_MISSING"))) {
+		return nil
+	}
+	return &shopeeproduct.ServiceError{Code: shopeeproduct.CodeLinkConflict, Message: "处理阶段已变化，当前不能一键替换，请刷新列表"}
+}

server/app/goauto/purchase/quick_replace_test.go

@@ -0,0 +1,44 @@
+package purchase
+
+import (
+	"context"
+	"testing"
+
+	"go-admin/app/goauto/models"
+	"gorm.io/gorm"
+)
+
+func TestQuickReplacementUsesCurrentStage(t *testing.T) {
+	for _, name := range []string{"pending", "disabled", "price-missing", "ready", "parse-failed", "collecting", "purchase-pending", "purchase-running", "order-created", "order-unknown"} {
+		t.Run(name, func(t *testing.T) {
+			db := testDB(t)
+			f := seed(t, db, liveCaps(), true)
+			allow := name == "pending" || name == "disabled" || name == "price-missing"
+			switch name {
+			case "pending", "disabled":
+				db.Model(&f.pdd).Update("status", name)
+			case "ready":
+				setCollectedPDDPrice(t, db, f.pdd.ID)
+			case "parse-failed":
+				db.Model(&f.syb).Update("parse_status", "failed")
+			case "collecting":
+				rule := models.CollectionRule{Name: "synthetic", ContentJSON: "{}"}
+				if err := db.Create(&rule).Error; err != nil {
+					t.Fatal(err)
+				}
+				if err := db.Create(&models.CollectionTask{DeviceID: &f.device.ID, PDDProductID: &f.pdd.ID, RuleID: rule.ID, Status: models.TaskStatusRunning, RuleSnapshot: "{}"}).Error; err != nil {
+					t.Fatal(err)
+				}
+			case "purchase-pending", "purchase-running", "order-created", "order-unknown":
+				status := map[string]string{"purchase-pending": "pending", "purchase-running": "running", "order-created": "order_created", "order-unknown": "order_result_unknown"}[name]
+				if err := db.Session(&gorm.Session{SkipHooks: true}).Create(&models.PurchaseTask{ExecutionMode: "live", Quantity: 1, SYBProductID: &f.syb.ID, PDDProductID: f.pdd.ID, Status: status, CreateRequestID: name}).Error; err != nil {
+					t.Fatal(err)
+				}
+			}
+			err := ValidateQuickReplacement(context.Background(), db, f.syb.ID)
+			if (err == nil) != allow {
+				t.Fatalf("allowed=%v: %v", allow, err)
+			}
+		})
+	}
+}

server/app/goauto/shopeeproduct/handler.go

@@ -14,7 +14,10 @@ import (
 	"gorm.io/gorm"
 )
 
-type Handler struct{ DB *gorm.DB }
+type Handler struct {
+	DB                     *gorm.DB
+	ReplacementEligibility ReplacementEligibility
+}
 
 func (handler Handler) List(c *gin.Context) {
 	page, err := queryInt(c.Query("page"), 1)
@@ -106,6 +109,7 @@ func (handler Handler) LinkPDD(c *gin.Context) {
 	if !ok {
 		return
 	}
+	service.ReplacementEligibility = handler.ReplacementEligibility
 	response, err := service.LinkPDD(c.Request.Context(), id, request)
 	respond(c, response, err)
 }

server/app/goauto/shopeeproduct/latest_collection.go

@@ -13,9 +13,18 @@ const CodeLatestCollectionUnavailable = "LATEST_COLLECTION_UNAVAILABLE"
 const CodeLinkConflict = "PDD_LINK_CONFLICT"
 
 type LatestCollectionRequest struct {
-	SYBProductID       uint64 `json:"sybProductId"`
-	DeviceID           uint64 `json:"deviceId"`
-	SpecContextVersion string `json:"specContextVersion"`
+	SYBProductID       uint64                       `json:"sybProductId"`
+	DeviceID           uint64                       `json:"deviceId"`
+	SpecContextVersion string                       `json:"specContextVersion"`
+	Replacement        *LatestCollectionReplacement `json:"replacement,omitempty"`
+}
+
+type LatestCollectionReplacement struct {
+	Preview              bool   `json:"preview"`
+	ExpectedPDDProductID uint64 `json:"expectedPddProductId"`
+	TaskID               uint64 `json:"taskId"`
+	TargetPDDProductID   uint64 `json:"targetPddProductId"`
+	TargetVersion        string `json:"targetVersion"`
 }
 
 type LatestCollectionSource struct {
@@ -23,6 +32,12 @@ type LatestCollectionSource struct {
 	DeviceID                 uint64 `json:"deviceId"`
 	PDDProductID             uint64 `json:"pddProductId"`
 	RequiresSpecConfirmation bool   `json:"requiresSpecConfirmation"`
+	TargetVersion            string `json:"targetVersion,omitempty"`
+	Title                    string `json:"title,omitempty"`
+	GoodsID                  string `json:"goodsId,omitempty"`
+	PreviousTitle            string `json:"previousTitle,omitempty"`
+	PreviousGoodsID          string `json:"previousGoodsId,omitempty"`
+	DeviceName               string `json:"deviceName,omitempty"`
 }
 
 func latestUnavailable(message string) error {
@@ -56,10 +71,28 @@ func (service *Service) linkLatestCollection(ctx context.Context, id uint64, req
 			}
 			return err
 		}
-		if shopee.PDDProductID != nil {
+		replacement := r.Replacement
+		var old models.PDDProduct
+		if replacement != nil {
+			if shopee.PDDProductID == nil || replacement.ExpectedPDDProductID == 0 || *shopee.PDDProductID != replacement.ExpectedPDDProductID {
+				return contextVersionStale()
+			}
+			if err := tx.Clauses(clause.Locking{Strength: "UPDATE"}).First(&old, *shopee.PDDProductID).Error; err != nil {
+				return err
+			}
+			if service.ReplacementEligibility == nil {
+				return invalidRequest("一键替换入口未配置")
+			}
+			if err := service.ReplacementEligibility(ctx, tx, syb.ID); err != nil {
+				return err
+			}
+			if !replacement.Preview && (replacement.TaskID == 0 || replacement.TargetPDDProductID == 0 || replacement.TargetVersion == "") {
+				return invalidRequest("请先预览并确认替换商品")
+			}
+		} else if shopee.PDDProductID != nil {
 			return &ServiceError{Code: CodeLinkConflict, Message: "商品已有关联，请刷新后查看；一键关联不会覆盖"}
 		}
-		if computeSpecContextVersion(nil, shopee.SpecsJSON, "") != r.SpecContextVersion {
+		if computeSpecContextVersion(shopee.PDDProductID, shopee.SpecsJSON, old.SpecsJSON) != r.SpecContextVersion {
 			return contextVersionStale()
 		}
 		var device models.AgentDevice
@@ -73,7 +106,11 @@ func (service *Service) linkLatestCollection(ctx context.Context, id uint64, req
 			return latestUnavailable("手机已停用，请重新选择")
 		}
 		var task models.CollectionTask
-		err := tx.Clauses(clause.Locking{Strength: "UPDATE"}).Where("device_id = ? AND source = ? AND status IN ?", r.DeviceID, models.CollectionTaskSourceAgentCurrentPage, []string{models.TaskStatusCompleted, models.TaskStatusCompletedPartial}).Order("finished_at DESC, id DESC").First(&task).Error
+		query := tx.Clauses(clause.Locking{Strength: "UPDATE"}).Where("device_id = ? AND source = ? AND status IN ?", r.DeviceID, models.CollectionTaskSourceAgentCurrentPage, []string{models.TaskStatusCompleted, models.TaskStatusCompletedPartial})
+		if replacement != nil && !replacement.Preview {
+			query = query.Where("id = ?", replacement.TaskID)
+		}
+		err := query.Order("finished_at DESC, id DESC").First(&task).Error
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return latestUnavailable("这台手机暂无成功的临时采集，请先采集商品")
 		}
@@ -101,18 +138,40 @@ func (service *Service) linkLatestCollection(ctx context.Context, id uint64, req
 		if err != nil || len(color)+len(size) == 0 {
 			return latestUnavailable("最近采集的 PDD 缺少可用规格，请先补采")
 		}
-		result := tx.Model(&models.ShopeeProduct{}).Where("id = ? AND pdd_product_id IS NULL", id).Updates(map[string]any{"pdd_product_id": pdd.ID, "last_update_request_id": request.RequestID})
-		if result.Error != nil {
-			return result.Error
-		}
-		if result.RowsAffected != 1 {
+		targetVersion := computeSpecContextVersion(&pdd.ID, "", pdd.SpecsJSON)
+		if replacement != nil && !replacement.Preview && (replacement.TargetPDDProductID != pdd.ID || replacement.TargetVersion != targetVersion) {
 			return contextVersionStale()
 		}
+		// Preview never writes. Same-product continuation also preserves the
+		// existing association and request marker; matching is a separate call.
+		if replacement == nil || (!replacement.Preview && old.ID != pdd.ID) {
+			query := tx.Model(&models.ShopeeProduct{}).Where("id = ?", id)
+			if replacement == nil {
+				query = query.Where("pdd_product_id IS NULL")
+			} else {
+				query = query.Where("pdd_product_id = ?", old.ID)
+			}
+			result := query.Updates(map[string]any{"pdd_product_id": pdd.ID, "last_update_request_id": request.RequestID})
+			if result.Error != nil {
+				return result.Error
+			}
+			if result.RowsAffected != 1 {
+				return contextVersionStale()
+			}
+		}
 		response, err = NewService(tx).Detail(ctx, id)
 		if err != nil {
 			return err
 		}
 		response.CollectionSource = &LatestCollectionSource{TaskID: task.ID, DeviceID: device.ID, PDDProductID: pdd.ID, RequiresSpecConfirmation: syb.ParseStatus == models.SYBParseStatusFailed && !syb.ManuallyConfirmed && !syb.AIConfirmed}
+		if replacement != nil {
+			response.CollectionSource.TargetVersion = targetVersion
+			response.CollectionSource.Title = pdd.Title
+			response.CollectionSource.GoodsID = pdd.GoodsID
+			response.CollectionSource.PreviousTitle = old.Title
+			response.CollectionSource.PreviousGoodsID = old.GoodsID
+			response.CollectionSource.DeviceName = device.Name
+		}
 		return nil
 	})
 	if err != nil {

server/app/goauto/shopeeproduct/quick_replace_test.go

@@ -0,0 +1,145 @@
+package shopeeproduct
+
+import (
+	"context"
+	"testing"
+
+	"go-admin/app/goauto/models"
+	"gorm.io/gorm"
+)
+
+func replacementFixture(t *testing.T) (*Service, uint64, LinkPDDRequest, models.CollectionTask, models.PDDProduct) {
+	s, id, req, task := latestFixture(t)
+	old := seedPDDProduct(t, s.DB, "pending")
+	if err := s.DB.Model(&models.ShopeeProduct{}).Where("id = ?", id).Update("pdd_product_id", old.ID).Error; err != nil {
+		t.Fatal(err)
+	}
+	detail, err := s.Detail(context.Background(), id)
+	if err != nil {
+		t.Fatal(err)
+	}
+	req.LatestCollection.SpecContextVersion = detail.Product.SpecContextVersion
+	req.LatestCollection.Replacement = &LatestCollectionReplacement{Preview: true, ExpectedPDDProductID: old.ID}
+	s.ReplacementEligibility = func(context.Context, *gorm.DB, uint64) error { return nil }
+	return s, id, req, task, old
+}
+
+func previewReplacement(t *testing.T, s *Service, id uint64, req *LinkPDDRequest) SaveResponse {
+	t.Helper()
+	preview, err := s.LinkPDD(context.Background(), id, *req)
+	if err != nil {
+		t.Fatal(err)
+	}
+	r := req.LatestCollection.Replacement
+	r.Preview = false
+	r.TaskID = preview.CollectionSource.TaskID
+	r.TargetPDDProductID = preview.CollectionSource.PDDProductID
+	r.TargetVersion = preview.CollectionSource.TargetVersion
+	return preview
+}
+
+func TestReplacementPreviewIsReadOnlyAndFreezesCandidate(t *testing.T) {
+	s, id, req, task, old := replacementFixture(t)
+	preview := previewReplacement(t, s, id, &req)
+	if *preview.Product.PDDProductID != old.ID {
+		t.Fatal("preview changed association")
+	}
+	var record models.ShopeeProduct
+	s.DB.First(&record, id)
+	if *record.PDDProductID != old.ID || record.LastUpdateRequestID != nil {
+		t.Fatal("preview wrote")
+	}
+	newer := task
+	newer.ID = 0
+	newer.Status = models.TaskStatusCompletedPartial
+	if err := s.DB.Create(&newer).Error; err != nil {
+		t.Fatal(err)
+	}
+	result, err := s.LinkPDD(context.Background(), id, req)
+	if err != nil || *result.Product.PDDProductID != *task.PDDProductID || result.CollectionSource.TaskID != task.ID {
+		t.Fatalf("frozen candidate: %+v %v", result, err)
+	}
+	if _, err := s.LinkPDD(context.Background(), id, req); err == nil {
+		t.Fatal("duplicate replaced stale association")
+	}
+}
+
+func TestReplacementSameProductDoesNotRebind(t *testing.T) {
+	s, id, req, task, _ := replacementFixture(t)
+	s.DB.Model(&models.ShopeeProduct{}).Where("id = ?", id).Update("pdd_product_id", *task.PDDProductID)
+	detail, _ := s.Detail(context.Background(), id)
+	req.LatestCollection.SpecContextVersion = detail.Product.SpecContextVersion
+	req.LatestCollection.Replacement.ExpectedPDDProductID = *task.PDDProductID
+	previewReplacement(t, s, id, &req)
+	if _, err := s.LinkPDD(context.Background(), id, req); err != nil {
+		t.Fatal(err)
+	}
+	var record models.ShopeeProduct
+	s.DB.First(&record, id)
+	if record.LastUpdateRequestID != nil {
+		t.Fatal("same product wrote association")
+	}
+}
+
+func TestReplacementRejectsChangesAfterPreview(t *testing.T) {
+	for _, change := range []string{"association", "specs", "target-specs", "task-status", "device", "stage", "missing-validator", "target-id", "task-id"} {
+		t.Run(change, func(t *testing.T) {
+			s, id, req, task, old := replacementFixture(t)
+			previewReplacement(t, s, id, &req)
+			expected := old.ID
+			switch change {
+			case "association":
+				other := seedPDDProduct(t, s.DB, "active")
+				expected = other.ID
+				s.DB.Model(&models.ShopeeProduct{}).Where("id = ?", id).Update("pdd_product_id", expected)
+			case "specs":
+				s.DB.Model(&models.ShopeeProduct{}).Where("id = ?", id).Update("specs_json", "[]")
+			case "target-specs":
+				s.DB.Model(&models.PDDProduct{}).Where("id = ?", *task.PDDProductID).Update("specs_json", `[{"role":"color","name":"颜色","values":[{"name":"白色","selectable":true}]}]`)
+			case "task-status":
+				s.DB.Model(&task).Update("status", "completed_partial")
+			case "device":
+				s.DB.Model(&models.AgentDevice{}).Where("id = ?", req.LatestCollection.DeviceID).Update("status", "disabled")
+			case "stage":
+				s.ReplacementEligibility = func(context.Context, *gorm.DB, uint64) error { return &ServiceError{Code: CodeLinkConflict} }
+			case "missing-validator":
+				s.ReplacementEligibility = nil
+			case "target-id":
+				req.LatestCollection.Replacement.TargetPDDProductID++
+			case "task-id":
+				req.LatestCollection.Replacement.TaskID++
+			}
+			if _, err := s.LinkPDD(context.Background(), id, req); err == nil {
+				t.Fatal("accepted changed context")
+			}
+			var record models.ShopeeProduct
+			s.DB.First(&record, id)
+			if *record.PDDProductID != expected {
+				t.Fatal("overwrote rejected association")
+			}
+		})
+	}
+}
+
+func TestReplacementConcurrentConfirmationsOnlyOneWrites(t *testing.T) {
+	s, id, req, _, _ := replacementFixture(t)
+	previewReplacement(t, s, id, &req)
+	connection, err := s.DB.DB()
+	if err != nil {
+		t.Fatal(err)
+	}
+	connection.SetMaxOpenConns(1) // SQLite serialization, not a MySQL lock claim.
+	results := make(chan error, 2)
+	for range 2 {
+		go func() { _, err := s.LinkPDD(context.Background(), id, req); results <- err }()
+	}
+	wins := 0
+	for range 2 {
+		if <-results == nil {
+			wins++
+		}
+	}
+	if wins != 1 {
+		t.Fatalf("writes=%d", wins)
+	}
+}

server/app/goauto/shopeeproduct/router.go

@@ -7,8 +7,8 @@ import (
 	jwt "github.com/go-admin-team/go-admin-core/sdk/pkg/jwtauth"
 )
 
-func InitRouter(engine *gin.Engine, auth *jwt.GinJWTMiddleware) {
-	handler := Handler{}
+func InitRouter(engine *gin.Engine, auth *jwt.GinJWTMiddleware, eligibility ReplacementEligibility) {
+	handler := Handler{ReplacementEligibility: eligibility}
 	admin := engine.Group("/api/admin/v1/shopee-products").Use(auth.MiddlewareFunc()).Use(middleware.AuthCheckRole())
 	adminOnlyRuns := engine.Group("/api/admin/v1/shopee-spec-auto-match/runs").Use(auth.MiddlewareFunc()).Use(middleware.AuthCheckRole()).Use(middleware.RequireRoleKey("admin"))
 	adminOnlyRuns.POST("", handler.StartAutoMatchRun)

server/app/goauto/shopeeproduct/service.go

@@ -57,7 +57,12 @@ func (err *ServiceError) Error() string {
 }
 func (err *ServiceError) Unwrap() error { return err.Cause }
 
-type Service struct{ DB *gorm.DB }
+type ReplacementEligibility func(context.Context, *gorm.DB, uint64) error
+
+type Service struct {
+	DB                     *gorm.DB
+	ReplacementEligibility ReplacementEligibility
+}
 
 func NewService(db *gorm.DB) *Service { return &Service{DB: db} }
 

web/src/views/goauto/syb-products/index.vue

@@ -35,9 +35,9 @@
                 <div class="quick-link-actions">
                   <el-button v-if="purchaseActionLabel({ nextAction: purchaseReady(row).processNextAction })" type="primary" link @click="runPurchaseNextAction(row, { ...purchaseReady(row), nextAction: purchaseReady(row).processNextAction })">{{ purchaseActionLabel({ nextAction: purchaseReady(row).processNextAction }) }}</el-button>
                   <el-button-group v-if="quickCanLink(row)">
-                    <el-button size="small" type="primary" plain :loading="quickBusyId === row.id" :disabled="!!quickBusyId" @click="quickStart(row)">一键关联</el-button>
+                    <el-button size="small" type="primary" plain :loading="quickBusyId === row.id" :disabled="!!quickBusyId" @click="quickStart(row)">{{ quickActionLabel(row) }}</el-button>
                     <el-dropdown trigger="click" @command="quickOpenPicker()">
-                      <el-button size="small" type="primary" plain aria-label="一键关联使用的手机" :icon="ArrowDown" />
+                      <el-button size="small" type="primary" plain :aria-label="`${quickActionLabel(row)}使用的手机`" :icon="ArrowDown" />
                       <template #dropdown>
                         <el-dropdown-menu>
                           <el-dropdown-item disabled>当前手机：{{ quickDeviceLabel() }}</el-dropdown-item>
@@ -57,7 +57,7 @@
       </el-card>
 
       <el-dialog v-model="quickPicker.open" :title="quickPicker.row ? '选择采集手机' : '切换采集手机'" width="460px" :close-on-click-modal="false" @close="quickCancelPicker">
-        <p>{{ quickPicker.row ? '选择后继续关联刚才的商品。' : '只修改各行共用的手机，不启动关联，也不影响正在进行的操作。' }}</p>
+        <p>{{ quickPicker.row ? '选择后继续处理刚才的商品；更换为其他商品前会再次确认。' : '只修改各行共用的手机，不启动关联或替换，也不影响正在进行的操作。' }}</p>
         <el-form label-width="80px">
           <el-form-item label="采集手机">
             <el-select v-model="quickPicker.deviceId" :loading="quickDeviceLoading" placeholder="请选择手机" style="width:100%">

web/src/views/goauto/syb-products/quick-link.js

@@ -1,4 +1,4 @@
-import { ElMessage } from 'element-plus'
+import { ElMessage, ElMessageBox } from 'element-plus'
 import { listDevices } from '@/api/goauto/devices'
 import { getShopeeProduct, linkShopeeProductPdd, autoMatchShopeeSpecMappings } from '@/api/goauto/shopee-products'
 import { previewPurchaseTasks } from '@/api/goauto/purchase-tasks'
@@ -20,6 +20,7 @@ export default {
   deactivated() { this.quickInvalidate() },
   methods: {
     quickInvalidate() {
+      if (this.quickPhase === '等待替换确认') ElMessageBox.close()
       this.quickGeneration++
       this.quickPickerGeneration++
       if (this.quickBusyId) this.quickMessages[this.quickBusyId] = '操作结果待确认，请刷新核对；离开页面不代表服务端已取消'
@@ -29,7 +30,16 @@ export default {
     },
     quickCanLink(row) {
       const ready = this.purchaseReady(row)
-      return this.canPurchase && !!row.shopeeProductId && ready.processNextAction === 'open_pdd_link' && !ready.pddProductId
+      return this.canPurchase && !!row.shopeeProductId && ((ready.processNextAction === 'open_pdd_link' && !ready.pddProductId) || this.quickCanReplace(row))
+    },
+    quickCanReplace(row) {
+      const ready = this.purchaseReady(row)
+      return !!ready.pddProductId && ready.processNextAction === 'open_pdd' && (
+        ['pdd_pending', 'pdd_collection_failed'].includes(ready.processStage) ||
+        (ready.processStage === 'manual_action' && ['PDD_NOT_READY', 'PDD_PRICE_MISSING'].includes(ready.reasonCode)))
+    },
+    quickActionLabel(row) {
+      return this.quickCanReplace(row) ? '一键替换' : '一键关联'
     },
     quickDeviceLabel() {
       const device = this.quickDevices.find(d => d.id === this.quickDeviceId)
@@ -61,34 +71,60 @@ export default {
     async quickStart(row) {
       if (!this.quickCanLink(row) || this.quickBusyId) return
       if (!this.quickDeviceId) return this.quickOpenPicker(row)
-      const frozen = { sybProductId: row.id, productId: row.shopeeProductId, deviceId: this.quickDeviceId }
+      const replacing = this.quickCanReplace(row)
+      const frozen = { sybProductId: row.id, productId: row.shopeeProductId, deviceId: this.quickDeviceId, oldPddId: this.purchaseReady(row).pddProductId }
       const generation = ++this.quickGeneration
       const current = () => generation === this.quickGeneration
       this.quickBusyId = row.id
       this.quickMessages[row.id] = ''
       this.quickPhase = '正在关联'
       let wrote = false
+      let targetId = null
       try {
         const detail = (await getShopeeProduct(frozen.productId, readOptions)).data
         if (!current()) return
-        if (detail.product.pddProductId) throw new Error('该商品已经关联，请查看现有关联')
+        if (!replacing && detail.product.pddProductId) throw new Error('该商品已经关联，请查看现有关联')
+        if (replacing && detail.product.pddProductId !== frozen.oldPddId) throw new Error('关联已变化，请刷新列表')
+        const latestCollection = { sybProductId: frozen.sybProductId, deviceId: frozen.deviceId, specContextVersion: detail.product.specContextVersion }
+        if (replacing) {
+          this.quickPhase = '正在读取最近采集'
+          const preview = (await linkShopeeProductPdd(frozen.productId, {
+            requestId: createRequestId(), latestCollection: { ...latestCollection, replacement: { preview: true, expectedPddProductId: frozen.oldPddId }}
+          }, readOptions)).data
+          if (!current()) return
+          const source = preview.collectionSource
+          targetId = source.pddProductId
+          latestCollection.replacement = { preview: false, expectedPddProductId: frozen.oldPddId, taskId: source.taskId, targetPddProductId: targetId, targetVersion: source.targetVersion }
+          if (targetId !== frozen.oldPddId) {
+            this.quickPhase = '等待替换确认'
+            try {
+              await ElMessageBox.confirm(`将「${source.previousTitle || '原商品'}（${source.previousGoodsId || frozen.oldPddId}）」替换为「${source.title || '最近采集商品'}（${source.goodsId || targetId}）」。来源：${source.deviceName || '手机'} #${frozen.deviceId}。共用此蝦皮商品的 SYB 明细也会使用新关联；已有采购任务不变。`, '确认替换 PDD 商品', { confirmButtonText: '确认替换并匹配', cancelButtonText: '取消', closeOnClickModal: false })
+            } catch {
+              if (current()) this.quickMessages[row.id] = '已取消，未修改关联'
+              return
+            }
+            if (!current()) return
+          }
+          this.quickPhase = targetId === frozen.oldPddId ? '正在核对现有关联' : '正在替换'
+        }
         const linked = (await linkShopeeProductPdd(frozen.productId, {
           requestId: createRequestId(),
-          latestCollection: { sybProductId: frozen.sybProductId, deviceId: frozen.deviceId, specContextVersion: detail.product.specContextVersion }
+          latestCollection
         }, readOptions)).data
         wrote = true
         if (!current()) return
         const ready = (await previewPurchaseTasks({ sybProductIds: [frozen.sybProductId] }, readOptions)).data.items[0]
         if (!current()) return
+        const outcome = replacing && targetId !== frozen.oldPddId ? '已替换' : '已关联'
         if (linked.collectionSource.requiresSpecConfirmation || !ready?.aiMatchEligible) {
-          this.quickMessages[row.id] = ready?.eligible ? '已关联，当前明细可创建采购' : '已关联；请按处理阶段提示继续人工处理'
+          this.quickMessages[row.id] = ready?.eligible ? `${outcome}，当前明细可创建采购` : `${outcome}；请按处理阶段提示继续人工处理`
         } else {
           this.quickPhase = '正在匹配并保存'
           const result = (await autoMatchShopeeSpecMappings(frozen.productId, {
             requestId: createRequestId(), specContextVersion: linked.product.specContextVersion
           }, detail.autoMatchTimeoutSeconds)).data
           if (!current()) return
-          this.quickMessages[row.id] = result.unmatchedCount ? '已关联并保存有效匹配；剩余规格请去匹配处理' : '已关联并保存匹配；以最新处理阶段为准'
+          this.quickMessages[row.id] = result.unmatchedCount ? `${outcome}并保存有效匹配；剩余规格请去匹配处理` : `${outcome}并保存匹配；以最新处理阶段为准`
         }
       } catch (error) {
         if (!current()) return
@@ -102,9 +138,13 @@ export default {
         try {
           const saved = (await getShopeeProduct(frozen.productId, readOptions)).data.product
           if (!current()) return
-          this.quickMessages[row.id] = saved.pddProductId
-            ? `当前已有关联，匹配结果请去匹配查看。${reason}`
-            : `当前未查到关联，操作结果未确认，请刷新核对后再操作。${reason}`
+          this.quickMessages[row.id] = replacing
+            ? (targetId && saved.pddProductId === targetId
+              ? `当前关联为本次目标商品，匹配结果请去匹配查看。${reason}`
+              : `当前关联${saved.pddProductId === frozen.oldPddId ? '仍为原商品' : '已变化'}；本次结果未确认，请刷新核对，不自动重试。${reason}`)
+            : saved.pddProductId
+              ? `当前已有关联，匹配结果请去匹配查看。${reason}`
+              : `当前未查到关联，操作结果未确认，请刷新核对后再操作。${reason}`
         } catch {
           if (current()) this.quickMessages[row.id] = `${wrote ? '关联已保存；' : ''}结果未确认，请刷新核对，不要连续重复点击。${reason}`
         }

web/tests/e2e/syb-quick-link.spec.ts

@@ -1,7 +1,8 @@
 import { expect, test } from '@playwright/test'
 
-async function setup(page: any) {
+async function setup(page: any, replacing = false) {
   const state = { userId: 1, role: 'purchaser', links: [] as any[], matches: [] as any[], linked: new Set<number>(), matched: new Set<number>(), aiFailure: false }
+  const replaced = new Set<number>()
   await page.context().addCookies([{ name: 'Admin-Token', value: 'mock-token', domain: 'localhost', path: '/' }])
   await page.route('**/api/**', async (route: any) => {
     const url = new URL(route.request().url()), path = url.pathname
@@ -11,13 +12,18 @@ async function setup(page: any) {
     if (path.endsWith('/menurole')) return ok([{ path: '/workbench', component: 'Layout', menuName: 'Workbench', title: '工作台', visible: '0', children: [{ path: '/syb-products', component: '/goauto/syb-products/index', menuName: 'GoAutoSybProducts', title: 'SYB 商品', visible: '0' }] }])
     if (path.endsWith('/syb-products')) return ok({ items: [1, 2].map(id => ({ id, orderCode: `TEST-${id}`, shopeeItemId: `100${id}`, shopeeProductId: id + 10, productTitle: '测试商品', targetColor: '黑色', targetSize: 'XL', quantity: 1, parseStatus: 'success' })), total: 2 })
     if (path.endsWith('/devices')) return ok({ items: [{ id: 10, name: '手机A', status: 'offline' }, { id: 20, name: '手机B', status: 'online' }], total: 2 })
-    if (path.endsWith('/batch-preview')) return ok({ items: route.request().postDataJSON().sybProductIds.map((id: number) => ({ sybProductId: id, pddProductId: state.linked.has(id) ? 55 : null, eligible: state.matched.has(id), aiMatchEligible: state.linked.has(id) && !state.matched.has(id), processStage: state.matched.has(id) ? 'purchase_ready' : state.linked.has(id) ? 'color_mapping' : 'pdd_unlinked', processNextAction: state.linked.has(id) ? 'open_mapping' : 'open_pdd_link' })) })
+    if (path.endsWith('/batch-preview')) return ok({ items: route.request().postDataJSON().sybProductIds.map((id: number) => replacing && !replaced.has(id)
+      ? { sybProductId: id, pddProductId: 44, processStage: 'pdd_collection_failed', processNextAction: 'open_pdd' }
+      : { sybProductId: id, pddProductId: state.linked.has(id) ? 55 : null, eligible: state.matched.has(id), aiMatchEligible: state.linked.has(id) && !state.matched.has(id), processStage: state.matched.has(id) ? 'purchase_ready' : state.linked.has(id) ? 'color_mapping' : 'pdd_unlinked', processNextAction: state.linked.has(id) ? 'open_mapping' : 'open_pdd_link' }) })
     const match = path.match(/shopee-products\/(\d+)(.*)/)
     if (match) {
       const productId = Number(match[1]), id = productId - 10
       const product = { id: productId, pddProductId: state.linked.has(id) ? 55 : null, specContextVersion: state.linked.has(id) ? 'after' : 'before', specs: [] }
+      if (replacing && !replaced.has(id)) product.pddProductId = 44
       if (match[2] === '/link-pdd') {
-        const body = route.request().postDataJSON(); state.links.push(body); state.linked.add(id)
+        const body = route.request().postDataJSON()
+        if (body.latestCollection.replacement?.preview) return ok({ product, collectionSource: { taskId: 7, deviceId: 10, pddProductId: 55, targetVersion: 'frozen', title: '新测试商品', previousTitle: '原测试商品', deviceName: '手机A' } })
+        state.links.push(body); state.linked.add(id); replaced.add(id)
         return ok({ product: { ...product, pddProductId: 55, specContextVersion: 'after' }, collectionSource: { taskId: 7, deviceId: body.latestCollection.deviceId, pddProductId: 55 } })
       }
       if (match[2] === '/specs/mapping/auto-match') {
@@ -30,12 +36,32 @@ async function setup(page: any) {
     return ok([])
   })
   await page.goto('/#/syb-products')
-  await expect(page.getByRole('button', { name: '一键关联', exact: true })).toHaveCount(2)
+  await expect(page.getByRole('button', { name: replacing ? '一键替换' : '一键关联', exact: true })).toHaveCount(2)
   return state
 }
 
+test('replacement reuses row position; cancel writes nothing; confirm freezes target and matches', async ({ page }, testInfo) => {
+  const state = await setup(page, true)
+  await expect(page.getByRole('button', { name: '查看 PDD 商品', exact: true })).toHaveCount(2)
+  await expect(page.getByRole('button', { name: '一键关联', exact: true })).toHaveCount(0)
+  await page.getByRole('button', { name: '一键替换', exact: true }).first().click()
+  await choose(page, '手机A', '选择并继续')
+  const confirm = page.getByRole('dialog', { name: '确认替换 PDD 商品' })
+  await expect(confirm).toContainText('共用此蝦皮商品')
+  await page.screenshot({ path: testInfo.outputPath('replacement-confirm.png'), animations: 'disabled' })
+  await confirm.getByRole('button', { name: '取消', exact: true }).click()
+  expect(state.links).toHaveLength(0); expect(state.matches).toHaveLength(0)
+  await page.getByRole('button', { name: '一键替换', exact: true }).first().click()
+  await confirm.getByRole('button', { name: '确认替换并匹配', exact: true }).click()
+  await expect.poll(() => state.matches.length).toBe(1)
+  expect(state.links).toHaveLength(1)
+  expect(state.links[0].latestCollection.replacement).toMatchObject({ expectedPddProductId: 44, taskId: 7, targetPddProductId: 55, targetVersion: 'frozen' })
+  await expect(page.locator('tbody').getByText('可创建采购', { exact: true })).toBeVisible()
+  await expect(confirm).toBeHidden()
+})
+
 async function choose(page: any, name: string, button: string) {
-  const dialog = page.getByRole('dialog')
+  const dialog = page.getByRole('dialog', { name: /^(选择|切换)采集手机$/ })
   await dialog.locator('.el-select').click()
   await page.getByRole('option', { name: new RegExp(name) }).click()
   await dialog.getByRole('button', { name: button, exact: true }).click()

web/tests/unit/syb-quick-link.test.cjs

@@ -10,6 +10,7 @@ function instance(overrides = {}) {
   const calls = { link: [], match: [], reads: 0, saved: [], refresh: 0 }
   const dependencies = {
     ElMessage: { warning() {} },
+    ElMessageBox: { confirm: async () => {}, close() {} },
     listDevices: async () => ({ data: { items: [{ id: 10, status: 'offline', name: 'A' }, { id: 20, status: 'online', name: 'B' }] } }),
     getShopeeProduct: async id => { calls.reads++; return { data: { product: { id, specContextVersion: 'before', pddProductId: calls.link.length ? 55 : null }, autoMatchTimeoutSeconds: 370 } } },
     linkShopeeProductPdd: async (id, body) => { calls.link.push(body); return { data: { product: { id, specContextVersion: 'after' }, collectionSource: { taskId: 9, pddProductId: 55 } } } },
@@ -87,3 +88,48 @@ test('preference isolates user and API environment, handles storage failure', ()
   process.env.VUE_APP_BASE_API = '/b'; assert.equal(p.readQuickLinkDevice(1), null)
   storage.setItem = () => { throw new Error('denied') }; assert.equal(p.rememberQuickLinkDevice(1, 20), false)
 })
+
+function replacementInstance(overrides = {}) {
+  const writes = [], previews = [], confirms = []
+  const context = instance({
+    getShopeeProduct: async () => ({ data: { product: { pddProductId: 44, specContextVersion: 'old' }, autoMatchTimeoutSeconds: 130 } }),
+    ElMessageBox: { confirm: async (...args) => { confirms.push(args) }, close() {} },
+    linkShopeeProductPdd: async (id, body) => {
+      const r = body.latestCollection.replacement
+      ;(r.preview ? previews : writes).push(body)
+      return { data: { product: { specContextVersion: 'new', pddProductId: r.preview ? 44 : 55 }, collectionSource: { taskId: 9, pddProductId: 55, targetVersion: 'target', title: '新商品', previousTitle: '原商品', deviceName: 'A' } } }
+    }, ...overrides
+  })
+  context.vm.purchaseReady = () => ({ pddProductId: 44, processNextAction: 'open_pdd', processStage: 'pdd_collection_failed' })
+  context.vm.quickDeviceId = 10
+  return { ...context, writes, previews, confirms }
+}
+test('replacement confirms once and submits the frozen source', async () => {
+  const { vm, writes, previews, confirms, calls } = replacementInstance()
+  await vm.quickStart(row)
+  assert.equal(previews.length, 1); assert.equal(confirms.length, 1); assert.equal(writes.length, 1)
+  assert.deepEqual(writes[0].latestCollection.replacement, { preview: false, expectedPddProductId: 44, taskId: 9, targetPddProductId: 55, targetVersion: 'target' })
+  assert.equal(calls.match.length, 1)
+})
+test('cancel replacement never writes or matches', async () => {
+  const { vm, writes, calls } = replacementInstance({ ElMessageBox: { confirm: async () => { throw 'cancel' } } })
+  await vm.quickStart(row)
+  assert.equal(writes.length, 0); assert.equal(calls.match.length, 0); assert.match(vm.quickMessages[1], /已取消/)
+})
+test('same product continues matching without replacement confirmation', async () => {
+  const { vm, confirms, calls } = replacementInstance({ linkShopeeProductPdd: async () => ({ data: { product: { specContextVersion: 'old' }, collectionSource: { taskId: 9, pddProductId: 44, targetVersion: 'same' } } }) })
+  await vm.quickStart(row)
+  assert.equal(confirms.length, 0); assert.equal(calls.match.length, 1)
+})
+test('failed replacement readback does not call old association a success', async () => {
+  const { vm, calls } = replacementInstance({ linkShopeeProductPdd: async () => { throw new Error('timeout') } })
+  await vm.quickStart(row)
+  assert.match(vm.quickMessages[1], /仍为原商品/); assert.equal(calls.match.length, 0)
+})
+test('replacement is not shown for collecting, successful, unknown or other manual stages', () => {
+  const { vm } = replacementInstance()
+  for (const stage of ['pdd_collecting', 'purchase_succeeded', 'order_review', 'task_created', 'color_mapping', 'manual_action']) {
+    vm.purchaseReady = () => ({ pddProductId: 44, processNextAction: 'open_pdd', processStage: stage })
+    assert.equal(vm.quickCanLink(row), false, stage)
+  }
+})