design

public/app.js

@@ -114,6 +114,8 @@ async function initLoginPage() {
     if (btn.disabled) return
     errorEl.classList.add('hidden')
     btn.disabled = true
+    btn.classList.add('is-loading')
+    btn.setAttribute('aria-busy', 'true')
     let cooldownActive = false
     try {
       await api('/api/auth/login', {
@@ -132,6 +134,8 @@ async function initLoginPage() {
         await applyCooldown(err.retryAfterSeconds || 900)
       }
     } finally {
+      btn.classList.remove('is-loading')
+      btn.removeAttribute('aria-busy')
       if (!cooldownActive) btn.disabled = false
     }
   })