fix(backend): JWT config mapstructure tag 修复 + 模型从 hotel 重构为 shop

- 修复 JWTConfig 缺少 mapstructure tag 导致 access_expire_min 解析为 0，
  token 签发即过期，所有 API 请求返回 401
- 全部 config struct 补齐 mapstructure tag（secret/dsn/hmac_secret 等）
- 模型层从 hotel/HotelID 统一重命名为 shop/ShopID
- 删除旧 migrations（001-004），新增 001_init 综合迁移文件
- 更新 schema.sql、testutil、handler/service/model 相关引用

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/internal/service/license_test.go

@@ -13,12 +13,12 @@ import (
 
 func TestLicenseService_Activate_Success(t *testing.T) {
 	db := testutil.SetupTestDB()
-	hotel := testutil.CreateTestHotel(db, "LIC001")
+	shop := testutil.CreateTestShop(db, "LIC001")
 
 	// 创建许可证
 	expiry := time.Now().Add(30 * 24 * time.Hour)
 	lic := &model.License{
-		HotelID:    hotel.ID,
+		ShopID:    shop.ID,
 		LicenseKey: "AAAAA-BBBBB-CCCCC-DDDDD",
 		IsActive:   true,
 		ExpiresAt:  &expiry,
@@ -36,10 +36,10 @@ func TestLicenseService_Activate_Success(t *testing.T) {
 
 func TestLicenseService_Activate_AlreadyBoundToDifferentDevice(t *testing.T) {
 	db := testutil.SetupTestDB()
-	hotel := testutil.CreateTestHotel(db, "LIC002")
+	shop := testutil.CreateTestShop(db, "LIC002")
 
 	lic := &model.License{
-		HotelID:    hotel.ID,
+		ShopID:    shop.ID,
 		LicenseKey: "EEEEE-FFFFF-GGGGG-HHHHH",
 		DeviceID:   "existing-device",
 		IsActive:   true,
@@ -56,10 +56,10 @@ func TestLicenseService_Activate_AlreadyBoundToDifferentDevice(t *testing.T) {
 
 func TestLicenseService_Activate_SameDevice(t *testing.T) {
 	db := testutil.SetupTestDB()
-	hotel := testutil.CreateTestHotel(db, "LIC003")
+	shop := testutil.CreateTestShop(db, "LIC003")
 
 	lic := &model.License{
-		HotelID:    hotel.ID,
+		ShopID:    shop.ID,
 		LicenseKey: "IIIII-JJJJJ-KKKKK-LLLLL",
 		DeviceID:   "same-device",
 		IsActive:   true,
@@ -88,11 +88,11 @@ func TestLicenseService_Activate_NotFound(t *testing.T) {
 
 func TestLicenseService_Activate_Inactive(t *testing.T) {
 	db := testutil.SetupTestDB()
-	hotel := testutil.CreateTestHotel(db, "LIC004")
+	shop := testutil.CreateTestShop(db, "LIC004")
 
 	// 先创建激活的许可证，再禁用（避免 GORM 零值跳过问题）
 	lic := &model.License{
-		HotelID:    hotel.ID,
+		ShopID:    shop.ID,
 		LicenseKey: "MMMMM-NNNNN-OOOOO-PPPPP",
 		IsActive:   true,
 	}
@@ -110,12 +110,12 @@ func TestLicenseService_Activate_Inactive(t *testing.T) {
 
 func TestLicenseService_Activate_Expired(t *testing.T) {
 	db := testutil.SetupTestDB()
-	hotel := testutil.CreateTestHotel(db, "LIC005")
+	shop := testutil.CreateTestShop(db, "LIC005")
 
 	// 已过期
 	expiry := time.Now().Add(-24 * time.Hour)
 	lic := &model.License{
-		HotelID:    hotel.ID,
+		ShopID:    shop.ID,
 		LicenseKey: "QQQQQ-RRRRR-SSSSS-TTTTT",
 		IsActive:   true,
 		ExpiresAt:  &expiry,
@@ -132,11 +132,11 @@ func TestLicenseService_Activate_Expired(t *testing.T) {
 
 func TestLicenseService_Verify_Success(t *testing.T) {
 	db := testutil.SetupTestDB()
-	hotel := testutil.CreateTestHotel(db, "LIC006")
+	shop := testutil.CreateTestShop(db, "LIC006")
 
 	expiry := time.Now().Add(30 * 24 * time.Hour)
 	lic := &model.License{
-		HotelID:    hotel.ID,
+		ShopID:    shop.ID,
 		LicenseKey: "UUUUU-VVVVV-WWWWW-XXXXX",
 		DeviceID:   "my-device",
 		IsActive:   true,
@@ -145,7 +145,7 @@ func TestLicenseService_Verify_Success(t *testing.T) {
 	require.NoError(t, db.Create(lic).Error)
 
 	svc := NewLicenseService(db)
-	result, err := svc.Verify(hotel.ID, "my-device")
+	result, err := svc.Verify(shop.ID, "my-device")
 
 	require.NoError(t, err)
 	require.NotNil(t, result)
@@ -154,12 +154,12 @@ func TestLicenseService_Verify_Success(t *testing.T) {
 
 func TestLicenseService_Verify_Expired(t *testing.T) {
 	db := testutil.SetupTestDB()
-	hotel := testutil.CreateTestHotel(db, "LIC007")
+	shop := testutil.CreateTestShop(db, "LIC007")
 
 	// 已过期
 	expiry := time.Now().Add(-1 * time.Hour)
 	lic := &model.License{
-		HotelID:    hotel.ID,
+		ShopID:    shop.ID,
 		LicenseKey: "YYYYY-ZZZZZ-AAAAA-BBBBB",
 		DeviceID:   "expired-device",
 		IsActive:   true,
@@ -168,7 +168,7 @@ func TestLicenseService_Verify_Expired(t *testing.T) {
 	require.NoError(t, db.Create(lic).Error)
 
 	svc := NewLicenseService(db)
-	result, err := svc.Verify(hotel.ID, "expired-device")
+	result, err := svc.Verify(shop.ID, "expired-device")
 
 	assert.Error(t, err)
 	assert.Equal(t, ErrLicenseExpired, err)
@@ -177,10 +177,10 @@ func TestLicenseService_Verify_Expired(t *testing.T) {
 
 func TestLicenseService_Verify_NotFound(t *testing.T) {
 	db := testutil.SetupTestDB()
-	hotel := testutil.CreateTestHotel(db, "LIC008")
+	shop := testutil.CreateTestShop(db, "LIC008")
 
 	svc := NewLicenseService(db)
-	result, err := svc.Verify(hotel.ID, "nonexistent-device")
+	result, err := svc.Verify(shop.ID, "nonexistent-device")
 
 	assert.Error(t, err)
 	assert.Equal(t, ErrLicenseNotFound, err)
@@ -189,11 +189,11 @@ func TestLicenseService_Verify_NotFound(t *testing.T) {
 
 func TestLicenseService_Verify_NoExpiry(t *testing.T) {
 	db := testutil.SetupTestDB()
-	hotel := testutil.CreateTestHotel(db, "LIC009")
+	shop := testutil.CreateTestShop(db, "LIC009")
 
 	// 永久许可证（无过期时间）
 	lic := &model.License{
-		HotelID:    hotel.ID,
+		ShopID:    shop.ID,
 		LicenseKey: "CCCCC-DDDDD-EEEEE-FFFFF",
 		DeviceID:   "lifetime-device",
 		IsActive:   true,
@@ -202,7 +202,7 @@ func TestLicenseService_Verify_NoExpiry(t *testing.T) {
 	require.NoError(t, db.Create(lic).Error)
 
 	svc := NewLicenseService(db)
-	result, err := svc.Verify(hotel.ID, "lifetime-device")
+	result, err := svc.Verify(shop.ID, "lifetime-device")
 
 	require.NoError(t, err)
 	require.NotNil(t, result)