feat: implement real profile save functionality

services/dataService.ts

@@ -57,6 +57,20 @@ export const getUserById = async (id: string): Promise<User | undefined> => {
   }
 };
 
+export const updateUser = async (id: string, userData: { name: string, bio: string }): Promise<boolean> => {
+  try {
+    const response = await fetch(`${API_URL}/users/${id}`, {
+      method: 'PUT',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(userData)
+    });
+    return response.ok;
+  } catch (error) {
+    console.error("API Error (updateUser):", error);
+    return false;
+  }
+};
+
 export const getAttendanceById = async (id: string): Promise<Attendance | undefined> => {
   try {
     const response = await fetch(`${API_URL}/attendances/${id}`);