feat: Refactor user context handling and service methods

- Updated middleware to fetch user and tenant models by ID and set them in context.
- Refactored common service methods to accept userID as a parameter instead of extracting from context.
- Modified content service methods to include userID as a parameter for better clarity and performance.
- Adjusted coupon, creator, notification, order, tenant, user, and wallet services to utilize userID directly.
- Enhanced context key constants for improved readability and maintainability.

backend/app/services/wallet.go

@@ -20,15 +20,9 @@ import (
 // @provider
 type wallet struct{}
 
-func (s *wallet) GetWallet(ctx context.Context) (*user_dto.WalletResponse, error) {
-	userID := ctx.Value(consts.CtxKeyUser)
-	if userID == nil {
-		return nil, errorx.ErrUnauthorized
-	}
-	uid := cast.ToInt64(userID)
-
+func (s *wallet) GetWallet(ctx context.Context, userID int64) (*user_dto.WalletResponse, error) {
 	// Get Balance
-	u, err := models.UserQuery.WithContext(ctx).Where(models.UserQuery.ID.Eq(uid)).First()
+	u, err := models.UserQuery.WithContext(ctx).Where(models.UserQuery.ID.Eq(userID)).First()
 	if err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, errorx.ErrRecordNotFound
@@ -39,7 +33,7 @@ func (s *wallet) GetWallet(ctx context.Context) (*user_dto.WalletResponse, error
 	// Get Transactions (Orders)
 	// Both purchase (expense) and recharge (income - if paid)
 	tbl, q := models.OrderQuery.QueryContext(ctx)
-	orders, err := q.Where(tbl.UserID.Eq(uid), tbl.Status.Eq(consts.OrderStatusPaid)).
+	orders, err := q.Where(tbl.UserID.Eq(userID), tbl.Status.Eq(consts.OrderStatusPaid)).
 		Order(tbl.CreatedAt.Desc()).
 		Limit(20). // Limit to recent 20
 		Find()
@@ -74,13 +68,7 @@ func (s *wallet) GetWallet(ctx context.Context) (*user_dto.WalletResponse, error
 	}, nil
 }
 
-func (s *wallet) Recharge(ctx context.Context, form *user_dto.RechargeForm) (*user_dto.RechargeResponse, error) {
-	userID := ctx.Value(consts.CtxKeyUser)
-	if userID == nil {
-		return nil, errorx.ErrUnauthorized
-	}
-	uid := cast.ToInt64(userID)
-
+func (s *wallet) Recharge(ctx context.Context, userID int64, form *user_dto.RechargeForm) (*user_dto.RechargeResponse, error) {
 	amount := int64(form.Amount * 100)
 	if amount <= 0 {
 		return nil, errorx.ErrBadRequest.WithMsg("金额无效")
@@ -89,7 +77,7 @@ func (s *wallet) Recharge(ctx context.Context, form *user_dto.RechargeForm) (*us
 	// Create Recharge Order
 	order := &models.Order{
 		TenantID:       0, // Platform / System
-		UserID:         uid,
+		UserID:         userID,
 		Type:           consts.OrderTypeRecharge,
 		Status:         consts.OrderStatusCreated,
 		Currency:       consts.CurrencyCNY,