feat: add user and admin page

frontend/assets/js/admin.js

@@ -0,0 +1,33 @@
+import { adminGetItems, createItem, deleteItem } from './api.js';
+
+const list = document.getElementById('items-list');
+const input = document.getElementById('new-item');
+const addBtn = document.getElementById('add-btn');
+
+async function renderItems() {
+  const items = await adminGetItems();
+  list.innerHTML = '';
+  items.forEach(item => {
+    const li = document.createElement('li');
+    li.innerHTML = `
+      <span>${item.title}</span>
+      <button onclick="removeItem(${item.id})">حذف</button>
+    `;
+    list.appendChild(li);
+  });
+}
+
+window.removeItem = async (id) => {
+  await deleteItem(id);
+  renderItems();
+};
+
+addBtn.onclick = async () => {
+  const title = input.value.trim();
+  if (!title) return;
+  await createItem(title);
+  input.value = '';
+  renderItems();
+};
+
+renderItems();