Widen template form dialog from max-w-xl to max-w-2xl

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/components/calendar/TemplateForm.tsx

@@ -88,7 +88,7 @@ export default function TemplateForm({ template, onClose }: TemplateFormProps) {
 
   return (
     <Dialog open={true} onOpenChange={onClose}>
-      <DialogContent>
+      <DialogContent className="max-w-2xl">
         <DialogClose onClick={onClose} />
         <DialogHeader>
           <DialogTitle>{template ? 'Edit Template' : 'New Template'}</DialogTitle>