fix(webui): bind destructive calendar controls to help

webui/src/features/calendar/CalendarCollectionDialogs.tsx

@@ -703,6 +703,8 @@ export function CalendarCollectionDeleteDialog({
             <legend>{eventCount} event{eventCount === 1 ? "" : "s"}</legend>
             <label>
               <input
+              data-help-context-id="calendar.collection-editor"
+              data-help-module-id="calendar"
               type="radio"
               name="calendar-delete-event-action"
               value="delete"
@@ -713,6 +715,8 @@ export function CalendarCollectionDeleteDialog({
             </label>
             <label>
               <input
+              data-help-context-id="calendar.collection-editor"
+              data-help-module-id="calendar"
               type="radio"
               name="calendar-delete-event-action"
               value="move"

webui/src/features/calendar/CalendarEventDialog.tsx

@@ -289,7 +289,7 @@ export function CalendarEventDialog({
       <>
           <div>
             {event && canDelete &&
-          <Button type="button" variant="danger" onClick={requestDelete} disabled={saving} disabledReason={saving ? CALENDAR_I18N.saving : undefined}>
+          <Button type="button" variant="danger" helpContextId="calendar.event-editor" helpModuleId="calendar" onClick={requestDelete} disabled={saving} disabledReason={saving ? CALENDAR_I18N.saving : undefined}>
                 <Trash2 size={16} /> i18n:govoplan-calendar.delete.f6fdbe48
               </Button>
           }