feat: EOD 23:15 seal + midnight seed shell for video/fans

Move daily snapshot/fans to 23:15 and add 00:01 seed that clones
last_completed ok=1 rows into today without advancing completed.
Evening runs force through seed markers; growth previous is per-aid
adjacent. Home shows short-update clock + 全站数据 date, and 收录视频
counts.

reaction_board/web/static/format.js

@@ -55,6 +55,22 @@ export function formatDate(timestamp) {
   }).format(date);
 }
 
+
+export function formatClock(timestamp) {
+  if (!timestamp) return "—";
+  const date = new Date(Number(timestamp) * 1000);
+  if (Number.isNaN(date.getTime())) return "—";
+  return new Intl.DateTimeFormat("zh-CN", {
+    hour: "2-digit", minute: "2-digit", hour12: false,
+    timeZone: "Asia/Shanghai",
+  }).format(date);
+}
+
+export function formatDataDate(value) {
+  if (!value) return "—";
+  return String(value).replace(/-/g, "/");
+}
+
 export function formatDateTime(timestamp) {
   if (!timestamp) return "—";
   const date = new Date(Number(timestamp) * 1000);