enhance dashboard and user interface: update heading sizes, translate user label to German, and implement loan management features including fetching and displaying loans with error handling

admin/src/utils/userActions.ts

@@ -50,28 +50,46 @@ export const handleEdit = async (
 };
 
 export const createUser = async (
-    username: string,
-    role: number,
-    password: string
+  username: string,
+  role: number,
+  password: string
 ) => {
-    try {
-        const response = await fetch(
-            `http://localhost:8002/api/createUser`,
-            {
-                method: "POST",
-                headers: {
-                    "Content-Type": "application/json",
-                    Authorization: `Bearer ${Cookies.get("token")}`,
-                },
-                body: JSON.stringify({ username, role, password }),
-            }
-        );
-        if (!response.ok) {
-            throw new Error("Failed to create user");
-        }
-        return { success: true };
-    } catch (error) {
-        console.error("Error creating user:", error);
-        return { success: false };
+  try {
+    const response = await fetch(`http://localhost:8002/api/createUser`, {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+        Authorization: `Bearer ${Cookies.get("token")}`,
+      },
+      body: JSON.stringify({ username, role, password }),
+    });
+    if (!response.ok) {
+      throw new Error("Failed to create user");
     }
+    return { success: true };
+  } catch (error) {
+    console.error("Error creating user:", error);
+    return { success: false };
+  }
+};
+
+export const deleteLoan = async (loanId: number) => {
+  try {
+    const response = await fetch(
+      `http://localhost:8002/api/deleteLoan/${loanId}`,
+      {
+        method: "DELETE",
+        headers: {
+          Authorization: `Bearer ${Cookies.get("token")}`,
+        },
+      }
+    );
+    if (!response.ok) {
+      throw new Error("Failed to delete loan");
+    }
+    return { success: true };
+  } catch (error) {
+    console.error("Error deleting loan:", error);
+    return { success: false };
+  }
 };