fix: agenda view scrolls to current date on render

The agenda lists the whole cached range, so clicking Today only reset scroll
to the top (earliest past event). Scroll the agenda to the current date (or the
next day with events) after rendering, so Today/mini-cal clicks land correctly.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/js/views/agenda.js

@@ -51,7 +51,7 @@ export function renderAgenda(container, currentDate, events, onEventClick) {
         </div>`;
       }).join('');
 
-    return `<div class="agenda-day">
+    return `<div class="agenda-day" data-date="${key}">
       <div class="agenda-date ${todayCls}">
         <div class="agenda-date-num">${date.getDate()}</div>
         <div class="agenda-date-label">
@@ -65,6 +65,19 @@ export function renderAgenda(container, currentDate, events, onEventClick) {
 
   container.innerHTML = `<div class="agenda-view">${html}</div>`;
 
+  // The agenda lists the whole cached range (past + future). Scroll so the
+  // current date (e.g. "today" after the Today button) sits at the top — or
+  // the next day with events if the current date itself has none.
+  const scrollEl = container.querySelector('.agenda-view');
+  if (scrollEl) {
+    const curKey = `${currentDate.getFullYear()}-${String(currentDate.getMonth()+1).padStart(2,'0')}-${String(currentDate.getDate()).padStart(2,'0')}`;
+    const days = [...scrollEl.querySelectorAll('.agenda-day')];
+    const target = days.find(d => d.dataset.date >= curKey) || days[days.length - 1];
+    if (target) {
+      scrollEl.scrollTop += target.getBoundingClientRect().top - scrollEl.getBoundingClientRect().top;
+    }
+  }
+
   container.querySelectorAll('.agenda-event').forEach(el => {
     el.addEventListener('click', () => {
       const ev = events.find(ev => ev.id === el.dataset.id && ev.url === el.dataset.url);