diff --git a/internal/architecture/catalog_module_structure_test.go b/internal/architecture/catalog_module_structure_test.go
index 38cbcd1b..56a81966 100644
--- a/internal/architecture/catalog_module_structure_test.go
+++ b/internal/architecture/catalog_module_structure_test.go
@@ -220,7 +220,7 @@ func TestCatalogProductImplementationLivesInNestedBoundedContext(t *testing.T) {
 	})
 	assertFileDeclaresFunctions(t, filepath.Join(domainRoot, "pricing.go"), []string{
 		"NormalizeWholesalePrices", "NormalizeWholesalePricesForSKUs",
-		"ResolveWholesaleUnitPrice", "ResolveWholesaleUnitPriceWithMatchQuantity", "ResolveWholesaleUnitPriceForSKU",
+		"ResolveWholesaleUnitPrice", "ResolveWholesaleUnitPriceForSKU",
 	})
 	assertFileDeclaresFunctions(t, filepath.Join(domainRoot, "purchase_policy.go"), []string{
 		"NormalizePurchaseType", "NormalizeFulfillmentType", "NormalizeStockDisplayMode",
diff --git a/internal/modules/catalog/product/domain/pricing.go b/internal/modules/catalog/product/domain/pricing.go
index 8e424107..3d770a41 100644
--- a/internal/modules/catalog/product/domain/pricing.go
+++ b/internal/modules/catalog/product/domain/pricing.go
@@ -182,12 +182,6 @@ func ResolveWholesaleUnitPrice(product *Product, baseUnitPrice decimal.Decimal,
 	return resolveWholesaleUnitPrice(product, baseUnitPrice, 0, "", quantity, quantity)
 }
 
-// ResolveWholesaleUnitPriceWithMatchQuantity 按 matchQuantity 判断批发档位，按 quantity 计算当前行优惠。
-// 商品存在多 SKU 时，批发门槛按同一商品总购买数判断，但每个订单行只计算自己的优惠金额。
-func ResolveWholesaleUnitPriceWithMatchQuantity(product *Product, baseUnitPrice decimal.Decimal, matchQuantity, quantity int) (unitPrice decimal.Decimal, discount decimal.Decimal, matched bool) {
-	return resolveWholesaleUnitPrice(product, baseUnitPrice, 0, "", matchQuantity, quantity)
-}
-
 // ResolveWholesaleUnitPriceForSKU 按指定 SKU 的批发价阶梯解析成交单价。
 func ResolveWholesaleUnitPriceForSKU(product *Product, baseUnitPrice decimal.Decimal, skuID uint, skuCode string, matchQuantity, quantity int) (unitPrice decimal.Decimal, discount decimal.Decimal, matched bool) {
 	return resolveWholesaleUnitPrice(product, baseUnitPrice, skuID, skuCode, matchQuantity, quantity)
diff --git a/internal/modules/notification/application/format/template.go b/internal/modules/notification/application/format/template.go
index 1e2c2cd6..4e6400e1 100644
--- a/internal/modules/notification/application/format/template.go
+++ b/internal/modules/notification/application/format/template.go
@@ -63,10 +63,6 @@ func ComposePlainTextMessage(title, body string) string {
 	return title + "\n\n" + body
 }
 
-func ComposeTelegramMessage(title, body string) string {
-	return ComposePlainTextMessage(title, body)
-}
-
 func JSONToMap(data jsonmap.JSON) map[string]interface{} {
 	if data == nil {
 		return map[string]interface{}{}
diff --git a/internal/modules/order/infrastructure/gormstore/order_store.go b/internal/modules/order/infrastructure/gormstore/order_store.go
index cfa48659..8a9ac1e4 100644
--- a/internal/modules/order/infrastructure/gormstore/order_store.go
+++ b/internal/modules/order/infrastructure/gormstore/order_store.go
@@ -40,13 +40,6 @@ func New(db *gorm.DB, guestCredentialSecret string) *Store {
 	return &Store{db: db, guestCredentialSecret: []byte(secret)}
 }
 
-func (r *Store) bind(tx *gorm.DB) *Store {
-	if tx == nil {
-		return r
-	}
-	return &Store{db: tx, guestCredentialSecret: r.guestCredentialSecret}
-}
-
 func (r *Store) withChildren(query *gorm.DB) *gorm.DB {
 	return query.
 		Where("orders.deleted_at IS NULL").
diff --git a/internal/modules/order/infrastructure/gormstore/risk_gate_test.go b/internal/modules/order/infrastructure/gormstore/risk_gate_test.go
index e6e0588e..d7c96d05 100644
--- a/internal/modules/order/infrastructure/gormstore/risk_gate_test.go
+++ b/internal/modules/order/infrastructure/gormstore/risk_gate_test.go
@@ -92,7 +92,7 @@ func TestRiskGateSerializesConcurrentGuestQuotaChecks(t *testing.T) {
 			defer wg.Done()
 			<-start
 			err := store.db.Transaction(func(dbtx *gorm.DB) error {
-				txStore := store.bind(dbtx)
+				txStore := &Store{db: dbtx, guestCredentialSecret: store.guestCredentialSecret}
 				if err := txStore.LockRiskKeys([]string{"guest:ip:1.2.3.4"}); err != nil {
 					return err
 				}
diff --git a/internal/modules/payment/infrastructure/gateway/dujiaopay/dujiaopay.go b/internal/modules/payment/infrastructure/gateway/dujiaopay/dujiaopay.go
index c3d1a236..78917ca0 100644
--- a/internal/modules/payment/infrastructure/gateway/dujiaopay/dujiaopay.go
+++ b/internal/modules/payment/infrastructure/gateway/dujiaopay/dujiaopay.go
@@ -238,14 +238,6 @@ func ResolveChain(tokenID string) string {
 	return ""
 }
 
-// IsSupportedTokenID 判断 token_id 是否已收录在内置映射表中。
-// 该表仅用于精确解析 chain，不再作为准入白名单：未收录但符合命名约定的 token_id
-// 同样可用，准入条件是 ResolveChain 能推导出非空 chain。
-func IsSupportedTokenID(tokenID string) bool {
-	_, ok := supportedTokenChains[strings.ToLower(strings.TrimSpace(tokenID))]
-	return ok
-}
-
 var supportedTokenChains = map[string]string{
 	"tron-trx":       "tron",
 	"tron-usdt":      "tron",
diff --git a/internal/modules/payment/infrastructure/gateway/dujiaopay/dujiaopay_test.go b/internal/modules/payment/infrastructure/gateway/dujiaopay/dujiaopay_test.go
index ab60a726..c9c1b70a 100644
--- a/internal/modules/payment/infrastructure/gateway/dujiaopay/dujiaopay_test.go
+++ b/internal/modules/payment/infrastructure/gateway/dujiaopay/dujiaopay_test.go
@@ -189,9 +189,6 @@ func TestResolveChainSupportsBSCUSDC(t *testing.T) {
 	if got := ResolveChain("bsc-usdc"); got != "bsc" {
 		t.Fatalf("ResolveChain(bsc-usdc) = %q, want bsc", got)
 	}
-	if !IsSupportedTokenID("BSC-USDC") {
-		t.Fatalf("IsSupportedTokenID should accept bsc-usdc case-insensitively")
-	}
 }
 
 // ResolveChain 对未收录的 token_id 按最后一个连字符切分，使 DujiaoPay 新增链或代币时
diff --git a/internal/modules/payment/transport/presenter/crypto_wallet.go b/internal/modules/payment/transport/presenter/crypto_wallet.go
index d5f18518..020ebb50 100644
--- a/internal/modules/payment/transport/presenter/crypto_wallet.go
+++ b/internal/modules/payment/transport/presenter/crypto_wallet.go
@@ -72,12 +72,6 @@ func ExtractCryptoWalletInfo(providerType, interactionMode string, payload jsonm
 	}
 }
 
-// ExtractUSDTWalletInfo 从 Payment.ProviderPayload 中提取 USDT 收款钱包地址和链上实付金额。
-func ExtractUSDTWalletInfo(providerType, interactionMode string, payload jsonmap.JSON) (address, chainAmount string) {
-	info := ExtractCryptoWalletInfo(providerType, interactionMode, payload)
-	return info.Address, info.ChainAmount
-}
-
 func firstPayloadString(values ...string) string {
 	for _, value := range values {
 		if value != "" {
diff --git a/internal/modules/payment/transport/presenter/crypto_wallet_test.go b/internal/modules/payment/transport/presenter/crypto_wallet_test.go
index a52bce4a..411664b3 100644
--- a/internal/modules/payment/transport/presenter/crypto_wallet_test.go
+++ b/internal/modules/payment/transport/presenter/crypto_wallet_test.go
@@ -86,7 +86,8 @@ func TestExtractUSDTWalletInfo(t *testing.T) {
 	}
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
-			gotAddr, gotAmount := ExtractUSDTWalletInfo(tc.providerType, tc.interactionMode, tc.payload)
+			info := ExtractCryptoWalletInfo(tc.providerType, tc.interactionMode, tc.payload)
+			gotAddr, gotAmount := info.Address, info.ChainAmount
 			if gotAddr != tc.wantAddress {
 				t.Errorf("address: got %q want %q", gotAddr, tc.wantAddress)
 			}
diff --git a/internal/modules/settings/application/google_auth_test.go b/internal/modules/settings/application/google_auth_test.go
index 654e2ee0..3902040b 100644
--- a/internal/modules/settings/application/google_auth_test.go
+++ b/internal/modules/settings/application/google_auth_test.go
@@ -23,10 +23,6 @@ func TestGoogleAuthSettingNormalizeValidateAndPublicConfig(t *testing.T) {
 	if err := settingssecurity.ValidateGoogleAuthSetting(settingssecurity.GoogleAuthSetting{Enabled: true}); !errors.Is(err, settingssecurity.ErrGoogleAuthConfigInvalid) {
 		t.Fatalf("missing client id error = %v", err)
 	}
-	public := settingssecurity.PublicGoogleAuthSetting(setting)
-	if public["enabled"] != true || public["client_id"] != "client.apps.googleusercontent.com" {
-		t.Fatalf("unexpected public config: %#v", public)
-	}
 }
 
 func TestPatchGoogleAuthSettingPersistsNormalizedValue(t *testing.T) {
diff --git a/internal/modules/settings/schema/security/google_auth.go b/internal/modules/settings/schema/security/google_auth.go
index e5eb9e15..4f088199 100644
--- a/internal/modules/settings/schema/security/google_auth.go
+++ b/internal/modules/settings/schema/security/google_auth.go
@@ -83,15 +83,6 @@ func MaskGoogleAuthSettingForAdmin(setting GoogleAuthSetting) jsonmap.JSON {
 	return EncodeGoogleAuthSetting(setting)
 }
 
-// PublicGoogleAuthSetting 返回前台初始化 Google Identity Services 所需的最小配置。
-func PublicGoogleAuthSetting(setting GoogleAuthSetting) map[string]interface{} {
-	normalized := NormalizeGoogleAuthSetting(setting)
-	return map[string]interface{}{
-		"enabled":   normalized.Enabled && normalized.ClientID != "",
-		"client_id": normalized.ClientID,
-	}
-}
-
 // DecodeGoogleAuthSetting 从持久化 JSON 解码，并对缺失字段使用 fallback。
 func DecodeGoogleAuthSetting(raw jsonmap.JSON, fallback GoogleAuthSetting) GoogleAuthSetting {
 	next := fallback
diff --git a/internal/selfupdate/updater.go b/internal/selfupdate/updater.go
index 0b8f0269..2dfa1faf 100644
--- a/internal/selfupdate/updater.go
+++ b/internal/selfupdate/updater.go
@@ -81,33 +81,10 @@ func NewUpdater() *Updater {
 	}
 }
 
-// Apply 下载指定发行版的当前平台归档并替换正在运行的二进制。
-// progress 可为 nil；非 nil 时会在各阶段回调，用于前端展示进度。
-//
-// 成功返回后二进制已就位，但进程仍是旧版本，需由调用方决定何时重启。
-func (u *Updater) Apply(ctx context.Context, release *version.Release, progress func(stage Stage, percent int)) error {
-	execPath, err := ExecutablePath()
-	if err != nil {
-		return err
-	}
-
-	// 覆盖整个下载 + 替换过程，而不只是 swap 那一瞬：下载期间跑一次 CLI 回滚，
-	// 会把 .backup 消耗掉，随后 swapBinary 又生成一个指向新版本的 .backup，
-	// 结果是两边都以为自己成功了，可恢复的旧二进制却已经没了。
-	unlock, err := acquireBinaryLock(execPath)
-	if err != nil {
-		return err
-	}
-	defer unlock()
-
-	return u.applyLocked(ctx, release, execPath, progress)
-}
-
 // applyLocked 执行实际升级，调用方必须已经持有 execPath 对应的跨进程锁。
 //
 // Manager.Start 在请求 GitHub release 之前取得锁并把所有权传到这里，从而覆盖
-// 「版本检查 → 下载 → 校验 → 替换 → 元数据落盘」完整事务；Apply 这个公开入口
-// 则在上面自行取得同一把锁后再调用。
+// 「版本检查 → 下载 → 校验 → 替换 → 元数据落盘」完整事务。
 func (u *Updater) applyLocked(ctx context.Context, release *version.Release, execPath string, progress func(stage Stage, percent int)) error {
 	report := func(stage Stage, percent int) {
 		if progress != nil {