small fix, don't worry about it

app/backend/internal/api/context_user.go

@@ -0,0 +1,23 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+func requireAuthenticatedUserID(c *gin.Context) (string, bool) {
+	userIDValue, exists := c.Get("user_id")
+	if !exists {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "User not authenticated"})
+		return "", false
+	}
+
+	userID, ok := userIDValue.(string)
+	if !ok || userID == "" {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid user context"})
+		return "", false
+	}
+
+	return userID, true
+}