feat(listing): 编辑已发布账号需先下架, 编号保持不变

Update 增加前置校验, 仅 draft/offline 状态可编辑, published 必须
先主动下架; 编辑后由 initialPublishState 推进到待审核, 审核通过
才重新展示. ListingNo 仅在 Create 时生成, 全程同行更新不变

backend/internal/modules/listing/service.go

@@ -8,26 +8,27 @@ import (
 )
 
 var (
-	ErrDependencyUnavailable = errors.New("dependency unavailable")
-	ErrInvalidInput          = errors.New("invalid listing input")
-	ErrListingLocked         = errors.New("listing locked")
-	ErrPublishCooldown       = errors.New("listing publish cooldown")
-	ErrMissingTitle          = errors.New("missing listing title")
-	ErrMissingServerRegion   = errors.New("missing server region")
-	ErrInvalidPrice          = errors.New("invalid listing price")
-	ErrInvalidDeposit        = errors.New("invalid listing deposit")
-	ErrDepositTooLow         = errors.New("listing deposit too low")
-	ErrInvalidHafCoin        = errors.New("invalid haf coin amount")
-	ErrMissingScreenshot     = errors.New("missing screenshot")
-	ErrMissingOnlineTime     = errors.New("missing online time")
-	ErrInvalidOnlineTime     = errors.New("invalid online time")
-	ErrAgreementRequired     = errors.New("listing publish agreement required")
-	ErrTargetOwnerInvalid    = errors.New("target owner invalid")
-	ErrMissingUploaderName   = errors.New("missing uploader name")
-	ErrMissingUploadData     = errors.New("missing upload data")
-	ErrUploaderNotFound      = errors.New("uploader not found")
-	ErrUploaderAmbiguous     = errors.New("uploader ambiguous")
-	ErrTooManyUploadItems    = errors.New("too many upload items")
+	ErrDependencyUnavailable    = errors.New("dependency unavailable")
+	ErrInvalidInput             = errors.New("invalid listing input")
+	ErrListingLocked            = errors.New("listing locked")
+	ErrListingMustOfflineToEdit = errors.New("listing must be offline to edit")
+	ErrPublishCooldown          = errors.New("listing publish cooldown")
+	ErrMissingTitle             = errors.New("missing listing title")
+	ErrMissingServerRegion      = errors.New("missing server region")
+	ErrInvalidPrice             = errors.New("invalid listing price")
+	ErrInvalidDeposit           = errors.New("invalid listing deposit")
+	ErrDepositTooLow            = errors.New("listing deposit too low")
+	ErrInvalidHafCoin           = errors.New("invalid haf coin amount")
+	ErrMissingScreenshot        = errors.New("missing screenshot")
+	ErrMissingOnlineTime        = errors.New("missing online time")
+	ErrInvalidOnlineTime        = errors.New("invalid online time")
+	ErrAgreementRequired        = errors.New("listing publish agreement required")
+	ErrTargetOwnerInvalid       = errors.New("target owner invalid")
+	ErrMissingUploaderName      = errors.New("missing uploader name")
+	ErrMissingUploadData        = errors.New("missing upload data")
+	ErrUploaderNotFound         = errors.New("uploader not found")
+	ErrUploaderAmbiguous        = errors.New("uploader ambiguous")
+	ErrTooManyUploadItems       = errors.New("too many upload items")
 )
 
 type Service struct {