refactor: 移除 success 字段，简化为 matched 单层判定模型

src/web/components/TargetGroup.tsx

@@ -9,7 +9,7 @@ interface TargetGroupProps {
 }
 
 export function TargetGroup({ name, targets, onTargetClick }: TargetGroupProps) {
-  const up = targets.filter((t) => t.latestCheck?.success && t.latestCheck?.matched).length;
+  const up = targets.filter((t) => t.latestCheck?.matched).length;
   const down = targets.length - up;
 
   return (