feat: initial

lib/utils.ts

@@ -0,0 +1,19 @@
+// Tiny className combiner (avoids an extra dependency).
+export function cn(...parts: Array<string | false | null | undefined>): string {
+  return parts.filter(Boolean).join(" ");
+}
+
+// Convert ASCII digits to Persian digits for display.
+const FA_DIGITS = ["۰", "۱", "۲", "۳", "۴", "۵", "۶", "۷", "۸", "۹"];
+export function toFa(value: string | number | null | undefined): string {
+  if (value === null || value === undefined) return "";
+  return String(value).replace(/\d/g, (d) => FA_DIGITS[Number(d)]);
+}
+
+// Seconds -> "م:ث" style label (e.g. 90 -> ۱:۳۰).
+export function formatDuration(seconds?: number | null): string {
+  if (!seconds && seconds !== 0) return "—";
+  const m = Math.floor(seconds / 60);
+  const s = Math.floor(seconds % 60);
+  return toFa(`${m}:${String(s).padStart(2, "0")}`);
+}