feat: add telegram-style resource stream

src/components/messageStream/utils/formatTime.ts

@@ -0,0 +1,27 @@
+function localeFor(lang: string): string {
+  if (lang === "zh-TW") return "zh-TW";
+  if (lang === "zh-CN") return "zh-CN";
+  return "en-US";
+}
+
+function formatDate(iso: string, lang: string): string {
+  const d = new Date(iso);
+  return new Intl.DateTimeFormat(localeFor(lang), {
+    year: "numeric",
+    month: lang === "en" ? "short" : "numeric",
+    day: "numeric",
+  }).format(d);
+}
+
+export function formatTime(iso: string, lang: string): string {
+  const d = new Date(iso);
+  return new Intl.DateTimeFormat(localeFor(lang), {
+    hour: "numeric",
+    minute: "2-digit",
+    hour12: lang === "en",
+  }).format(d);
+}
+
+export function formatDateTime(iso: string, lang: string): string {
+  return `${formatDate(iso, lang)} ${formatTime(iso, lang)}`;
+}