refactor: auto-prompt for notification permission, drop OT alerts button

Browsers already gate Notification.requestPermission behind a native
prompt, so a dedicated button was redundant UI clutter. Prompting on
load (only when permission state is "default") keeps the flow and
clears space in the banner for future notification types.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/static/script.js

@@ -394,29 +394,10 @@ function maybeNotifyOT(data) {
     if (changed) persistSeenOT(seen);
 }
 
-function wireOTButton() {
-    const btn = document.querySelector('.banner-notify');
-    if (!btn) return;
-    if (!('Notification' in window)) {
-        btn.disabled = true;
-        btn.title = 'Notifications not supported in this browser';
-        return;
-    }
-    reflectOTPermission(btn);
-    btn.addEventListener('click', async () => {
-        if (Notification.permission === 'default') {
-            await Notification.requestPermission();
-        }
-        reflectOTPermission(btn);
-    });
-}
-
-function reflectOTPermission(btn) {
-    const state = Notification.permission;
-    btn.dataset.perm = state;
-    if (state === 'granted')      btn.title = 'OT alerts enabled';
-    else if (state === 'denied')  btn.title = 'OT alerts blocked in browser settings';
-    else                          btn.title = 'Enable OT alerts';
+function requestNotificationPermission() {
+    if (!('Notification' in window)) return;
+    if (Notification.permission !== 'default') return;
+    Notification.requestPermission().catch(() => {});
 }
 
 // ── Init ─────────────────────────────────────────────
@@ -427,7 +408,7 @@ function autoRefresh() {
 }
 
 window.addEventListener('load', () => {
-    wireOTButton();
+    requestNotificationPermission();
     autoRefresh();
     setInterval(tickClocks, 1000);
     if ('serviceWorker' in navigator) {