Refactor Notification Email Structure in Customer and User Services

- Updated the email notification logic in the customer and user service layers to utilize the new notification Model struct, enhancing the clarity and consistency of notification requests.
- Modified the email content to include structured fields such as Title, Message, Type, Priority, and UserID, improving the overall notification management.
- Ensured that all relevant service methods (Register, UpdateStatus, RequestResetPassword, ResetPassword) are updated to reflect these changes, promoting a unified approach to notification handling.

internal/customer/service.go

@@ -135,7 +135,14 @@ func (s *customerService) Register(ctx context.Context, form *CreateCustomerForm
 		"company_ids": Companies,
 	})
 
-	go s.notification.SendEmail(ctx, customer.Email, fmt.Sprintf("Welcome to Tender Management\nUsername: %s\nPassword: %s", customer.Username, form.Password), customer.ID.Hex())
+	go s.notification.SendEmail(ctx, notification.Model{
+		Recipient: customer.Email,
+		Title:     "Welcome to Opplens",
+		Message:   fmt.Sprintf("Welcome to Opplens\nUsername: %s\nPassword: %s", customer.Username, form.Password),
+		Type:      "info",
+		Priority:  "important",
+		UserID:    customer.ID.Hex(),
+	})
 
 	return customer.ToResponse(nil), nil
 }
@@ -332,7 +339,14 @@ func (s *customerService) UpdateStatus(ctx context.Context, id string, form *Upd
 		"status":      form.Status,
 	})
 
-	go s.notification.SendEmail(ctx, customer.Email, fmt.Sprintf("Your account has been %s", strings.ToUpper(form.Status)), customer.ID.Hex())
+	go s.notification.SendEmail(ctx, notification.Model{
+		Recipient: customer.Email,
+		Title:     "Account Status Updated",
+		Message:   fmt.Sprintf("Your account has been %s", strings.ToUpper(form.Status)),
+		Type:      "warning",
+		Priority:  "important",
+		UserID:    customer.ID.Hex(),
+	})
 
 	return nil
 }
@@ -794,7 +808,14 @@ func (s *customerService) RequestResetPassword(ctx context.Context, form *Reques
 	}
 
 	// Send OTP via email
-	go s.notification.SendEmail(ctx, form.Email, fmt.Sprintf("Your password reset code is: %s", otpCode), customer.ID.Hex())
+	go s.notification.SendEmail(ctx, notification.Model{
+		Recipient: form.Email,
+		Title:     "Password Reset",
+		Message:   fmt.Sprintf("Your password reset code is: %s", otpCode),
+		Type:      "info",
+		Priority:  "important",
+		UserID:    customer.ID.Hex(),
+	})
 
 	s.logger.Info("Password reset OTP sent successfully", map[string]interface{}{
 		"email":       form.Email,
@@ -982,7 +1003,14 @@ func (s *customerService) ResetPassword(ctx context.Context, form *ResetPassword
 		"customer_id": customer.ID,
 	})
 
-	go s.notification.SendEmail(ctx, tokenData.Email, "Your password has been reset successfully", customer.ID.Hex())
+	go s.notification.SendEmail(ctx, notification.Model{
+		Recipient: tokenData.Email,
+		Title:     "Password Reset Success",
+		Message:   "Your password has been reset successfully",
+		Type:      "info",
+		Priority:  "important",
+		UserID:    customer.ID.Hex(),
+	})
 
 	return &ResetPasswordResponse{
 		Message: "Password reset successfully",