feat(frontend): schedule history dialog with rollback, wire ConfigHistorySheet

k-tv-frontend/app/(main)/dashboard/components/channel-card.tsx

@@ -11,6 +11,7 @@ import {
   Download,
   ChevronUp,
   ChevronDown,
+  History,
 } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { useActiveSchedule } from "@/hooks/use-channels";
@@ -29,6 +30,7 @@ interface ChannelCardProps {
   onExport: () => void;
   onMoveUp: () => void;
   onMoveDown: () => void;
+  onScheduleHistory: () => void;
 }
 
 function useScheduleStatus(channelId: string) {
@@ -69,6 +71,7 @@ export function ChannelCard({
   onExport,
   onMoveUp,
   onMoveDown,
+  onScheduleHistory,
 }: ChannelCardProps) {
   const [confirmOpen, setConfirmOpen] = useState(false);
   const blockCount = Object.values(channel.schedule_config.day_blocks).reduce(
@@ -185,6 +188,15 @@ export function ChannelCard({
         >
           <CalendarDays className="size-3.5" />
         </Button>
+        <Button
+          size="icon-sm"
+          variant="ghost"
+          onClick={onScheduleHistory}
+          title="Schedule history"
+          className="text-zinc-600 hover:text-zinc-200"
+        >
+          <History className="size-3.5" />
+        </Button>
         <Button
           size="icon-sm"
           asChild