fix: formatDateTime includes seconds

src/util/format.ts

@@ -7,7 +7,8 @@ export function formatDateTime(t: string): string {
   const dd = String(d.getDate()).padStart(2, '0')
   const h = String(d.getHours()).padStart(2, '0')
   const mi = String(d.getMinutes()).padStart(2, '0')
-  return `${y}-${mo}-${dd} ${h}:${mi}`
+  const s = String(d.getSeconds()).padStart(2, '0')
+  return `${y}-${mo}-${dd} ${h}:${mi}:${s}`
 }
 
 export function relativeTime(t: string): string {