diff --git a/containers/libreportal/frontend/components/apps/services/js/services-manager.js b/containers/libreportal/frontend/components/apps/services/js/services-manager.js
index 672154c..7194a97 100644
--- a/containers/libreportal/frontend/components/apps/services/js/services-manager.js
+++ b/containers/libreportal/frontend/components/apps/services/js/services-manager.js
@@ -282,8 +282,7 @@ class ServicesManager {
   _renderRichDetail(info) {
     if (!info || !info.detail) return '';
     const d = info.detail;
-    const fmt = window.SystemFmt;
-    if (!fmt) return '';
+    const fmt = window.SystemFmt || SVC_FMT;
     const lim = d.limits || {};
     const memLimit = lim.memory || 0;
     const cpuLimit = lim.nano_cpus
@@ -350,7 +349,7 @@ class ServicesManager {
     const stats = info?.stats;
     const detail = info?.detail;
     const memLimit = detail?.limits?.memory || 0;
-    const fmt = window.SystemFmt;
+    const fmt = window.SystemFmt || SVC_FMT;
     const cpuEl = item.querySelector('[data-svc-live="cpu"]');
     const memEl = item.querySelector('[data-svc-live="mem"]');
     if (cpuEl) cpuEl.textContent = stats ? `${(stats.cpu_percent ?? 0).toFixed(1)}% CPU` : '—';
@@ -411,7 +410,7 @@ class ServicesManager {
     const stats = info.stats;
     const detail = info.detail;
     const memLimit = detail?.limits?.memory || 0;
-    const fmt = window.SystemFmt;
+    const fmt = window.SystemFmt || SVC_FMT;
     const cpuTxt = stats ? `${(stats.cpu_percent ?? 0).toFixed(1)}% CPU` : '—';
     const memUsed = stats?.memory?.used ?? 0;
     const memPct = memLimit > 0 ? (memUsed / memLimit) * 100 : (stats?.memory?.percent ?? 0);
@@ -804,6 +803,34 @@ class ServicesManager {
 
 // Tiny helpers ----------------------------------------------------------
 
+// Number/time formatters for the rich detail panel + live stat chips. Mirrors
+// the admin System page's window.SystemFmt, but owned here so the Services tab
+// renders its advanced detail even when that page module hasn't loaded — it's
+// lazy, so visiting /admin/system must NOT be a prerequisite for this tab.
+// Prefer window.SystemFmt when present so both surfaces share one implementation.
+const SVC_FMT = {
+  bytes(n) {
+    n = Number(n) || 0;
+    const u = ['B', 'KB', 'MB', 'GB', 'TB']; let i = 0;
+    while (n >= 1024 && i < u.length - 1) { n /= 1024; i++; }
+    return `${n.toFixed(i ? 1 : 0)} ${u[i]}`;
+  },
+  rate(n) { return `${this.bytes(n)}/s`; },
+  timeAgo(unixSec) {
+    if (!unixSec) return '';
+    const diff = Math.floor(Date.now() / 1000) - unixSec;
+    if (diff < 60) return `${diff}s ago`;
+    if (diff < 3600) return `${Math.floor(diff / 60)}m ago`;
+    if (diff < 86400) return `${Math.floor(diff / 3600)}h ago`;
+    return `${Math.floor(diff / 86400)}d ago`;
+  },
+  timeAgoIso(iso) {
+    if (!iso) return '';
+    const t = Math.floor(new Date(iso).getTime() / 1000);
+    return Number.isFinite(t) && t > 0 ? this.timeAgo(t) : '';
+  },
+};
+
 function escapeHtml(s) {
   return String(s ?? '')
     .replace(/&/g, '&amp;')