fix: 补上 dashboard 缺失的 formatBytes 函数定义

health.html

@@ -642,6 +642,13 @@
                 return `${m}m`;
             };
 
+            const formatBytes = (b) => {
+                if (!b) return "0 B";
+                const k = 1024, sizes = ["B", "KB", "MB", "GB"];
+                const i = Math.floor(Math.log(b) / Math.log(k));
+                return (b / Math.pow(k, i)).toFixed(1) + " " + sizes[i];
+            };
+
             onMounted(() => {
                 refresh();
                 setInterval(refresh, 10000);