feat: Refactor DTOs to use types.ULID and update companyId fields to be optional

backend/internal/api/middleware/jwt_auth.go

@@ -17,6 +17,7 @@ import (
 	"github.com/timetracker/backend/internal/api/utils"
 	"github.com/timetracker/backend/internal/config"
 	"github.com/timetracker/backend/internal/models"
+	"github.com/timetracker/backend/internal/types"
 )
 
 var (
@@ -318,41 +319,41 @@ func validateToken(tokenString string) (*Claims, error) {
 }
 
 // GetUserIDFromContext extracts the user ID from the context
-func GetUserIDFromContext(c *gin.Context) (ulid.ULID, error) {
+func GetUserIDFromContext(c *gin.Context) (types.ULID, error) {
 	userID, exists := c.Get("userID")
 	if !exists {
-		return ulid.ULID{}, errors.New("user ID not found in context")
+		return types.ULID{}, errors.New("user ID not found in context")
 	}
 
 	userIDStr, ok := userID.(string)
 	if !ok {
-		return ulid.ULID{}, errors.New("invalid user ID type in context")
+		return types.ULID{}, errors.New("invalid user ID type in context")
 	}
 
 	id, err := ulid.Parse(userIDStr)
 	if err != nil {
-		return ulid.ULID{}, err
+		return types.ULID{}, err
 	}
 
-	return id, nil
+	return types.FromULID(id), nil
 }
 
 // GetCompanyIDFromContext extracts the company ID from the context
-func GetCompanyIDFromContext(c *gin.Context) (ulid.ULID, error) {
+func GetCompanyIDFromContext(c *gin.Context) (types.ULID, error) {
 	companyID, exists := c.Get("companyID")
 	if !exists {
-		return ulid.ULID{}, errors.New("company ID not found in context")
+		return types.ULID{}, errors.New("company ID not found in context")
 	}
 
 	companyIDStr, ok := companyID.(string)
 	if !ok {
-		return ulid.ULID{}, errors.New("invalid company ID type in context")
+		return types.ULID{}, errors.New("invalid company ID type in context")
 	}
 
 	id, err := ulid.Parse(companyIDStr)
 	if err != nil {
-		return ulid.ULID{}, err
+		return types.ULID{}, err
 	}
 
-	return id, nil
+	return types.FromULID(id), nil
 }