Initial LinkLog implementation

frontend/static/logout.js

@@ -0,0 +1,20 @@
+(() => {
+const logoutButton = document.querySelector('#logout-button');
+
+logoutButton.addEventListener('click', async () => {
+  const token = localStorage.getItem('linklogAccessToken');
+  logoutButton.disabled = true;
+  logoutButton.textContent = 'Signing out...';
+
+  if (token) {
+    await fetch('/api/auth/logout', {
+      method: 'POST',
+      headers: {'Content-Type': 'application/json'},
+      body: JSON.stringify({token}),
+    }).catch(() => undefined);
+  }
+
+  localStorage.removeItem('linklogAccessToken');
+  window.location.assign('/login');
+});
+})();