added cancel selection option

public/index.html

@@ -485,7 +485,7 @@ function dayClick(dk) {
   if (!isSelecting) {
     selectionStart = dk;
     isSelecting = true;
-    document.getElementById('sel-hint').textContent = '📍 Kattints a befejező dátumra';
+    document.getElementById('sel-hint').textContent = '📍 Kattints a befejező dátumra (ESC = mégse)';
     highlightSelection(dk, dk);
   } else {
     const start = selectionStart < dk ? selectionStart : dk;
@@ -613,6 +613,16 @@ function escapeHtml(t) {
   return d.innerHTML;
 }
 
+// Cancel selection with ESC
+document.addEventListener('keydown', function(e) {
+  if (e.key === 'Escape' && isSelecting) {
+    isSelecting = false;
+    selectionStart = null;
+    document.getElementById('sel-hint').textContent = 'Kattints a kezdő dátumra a naptárban ↓';
+    document.querySelectorAll('.cal-day').forEach(el => el.classList.remove('in-selection'));
+  }
+});
+
 // Start
 checkAuth();
 </script>