feat: 添加评论时间格式化功能，优化评论项显示，支持显示编辑时间

web/src/utils/common/datetime.ts

@@ -0,0 +1,52 @@
+function getAgoString(diff: number, unitI18n: { secondsAgo: string; minutesAgo: string; hoursAgo: string; daysAgo: string; }): string {
+  let value: number, unit: string;
+  if (diff < 60 * 1000) {
+    value = Math.floor(diff / 1000);
+    unit = unitI18n.secondsAgo;
+    return `${value}${unit}`;
+  } else if (diff < 60 * 60 * 1000) {
+    value = Math.floor(diff / (60 * 1000));
+    unit = unitI18n.minutesAgo;
+    return `${value}${unit}`;
+  } else if (diff < 24 * 60 * 60 * 1000) {
+    value = Math.floor(diff / (60 * 60 * 1000));
+    unit = unitI18n.hoursAgo;
+    return `${value}${unit}`;
+  } else {
+    value = Math.floor(diff / (24 * 60 * 60 * 1000));
+    unit = unitI18n.daysAgo;
+    return `${value}${unit}`;
+  }
+}
+
+export function formatDateTime({
+  dateTimeString,
+  locale,
+  convertShortAgo,
+  convertShortAgoDuration = 3 * 24 * 60 * 60 * 1000,
+  unitI18n = { secondsAgo: "s ago", minutesAgo: "m ago", hoursAgo: "h ago", daysAgo: "d ago" }
+}: {
+  dateTimeString: string;
+  locale: string;
+  convertShortAgo?: boolean;
+  convertShortAgoDuration?: number;
+  unitI18n?: { secondsAgo: string; minutesAgo: string; hoursAgo: string; daysAgo: string; };
+}): string {
+  const date = new Date(dateTimeString);
+  const now = new Date();
+  const diff = now.getTime() - date.getTime();
+
+  if (convertShortAgo && diff >= 0 && diff < convertShortAgoDuration) {
+    return getAgoString(diff, unitI18n);
+  }
+
+  return date.toLocaleString(locale, {
+    year: 'numeric',
+    month: 'short',
+    day: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+    second: '2-digit',
+    hour12: false,
+  });
+}