rename web/ to admin/, along with the web-named build and cli identifiers

admin/src/lib/format.ts

@@ -0,0 +1,27 @@
+/** Unix seconds → localized date-time. `locale`/`timeZone` exist for deterministic tests. */
+export function formatTime(unixSeconds: number, locale?: string, timeZone?: string): string {
+	return new Intl.DateTimeFormat(locale, {
+		dateStyle: "medium",
+		timeStyle: "medium",
+		timeZone,
+	}).format(new Date(unixSeconds * 1000));
+}
+
+const BYTE_UNITS = ["KiB", "MiB", "GiB", "TiB"] as const;
+
+export function formatBytes(bytes: number): string {
+	if (bytes < 1024) return `${bytes} B`;
+	let value = bytes;
+	let unit: string = BYTE_UNITS[0];
+	for (const next of BYTE_UNITS) {
+		unit = next;
+		value /= 1024;
+		if (value < 1024) break;
+	}
+	return `${value.toFixed(1)} ${unit}`;
+}
+
+/** Microseconds → milliseconds with one decimal, e.g. 1234 → "1.2 ms". */
+export function formatMicros(micros: number): string {
+	return `${(micros / 1000).toFixed(1)} ms`;
+}