refactor and cleanup

services/database/addPoiService.js

@@ -0,0 +1,14 @@
+// /services/database/addPoiService.js
+export const addPoiService = async (formData) => {
+  const response = await fetch("/api/talas_v5_DB/pois/addLocation", {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(formData),
+  });
+
+  if (!response.ok) {
+    throw new Error("Fehler beim Hinzufügen des POI");
+  }
+
+  return await response.json();
+};