Harden media health checks and duration extraction

oudelaa_dashboard/lib/format.ts

@@ -1,9 +1,13 @@
 export function formatDateTime(value?: string | null) {
   if (!value) return "-";
   try {
-    return new Intl.DateTimeFormat("ar-SA", {
-      dateStyle: "medium",
-      timeStyle: "short",
+    return new Intl.DateTimeFormat("en-US", {
+      year: "numeric",
+      month: "short",
+      day: "2-digit",
+      hour: "2-digit",
+      minute: "2-digit",
+      hour12: true,
     }).format(new Date(value));
   } catch {
     return value;