show last-run status/time/message for finished jobs in the admin panel

The Jobs panel only surfaced live progress; once a job finished you couldn't see
when it ran, whether it succeeded, or its message (e.g. a regime/collector error).
Add a "Last run <ago> · <status> — <message>" line per job, colored by status,
from the runtime_* fields the backend already returns.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/components/admin/JobControls.tsx

@@ -13,6 +13,22 @@ function formatNextRun(iso: string | null): string {
   return `in ${hrs}h`;
 }
 
+function formatAgo(iso: string | null | undefined): string {
+  if (!iso) return '';
+  const mins = Math.floor((Date.now() - new Date(iso).getTime()) / 60_000);
+  if (mins < 1) return 'just now';
+  if (mins < 60) return `${mins}m ago`;
+  const hrs = Math.floor(mins / 60);
+  if (hrs < 24) return `${hrs}h ago`;
+  return `${Math.floor(hrs / 24)}d ago`;
+}
+
+function lastRunColor(status: string | null | undefined): string {
+  if (status === 'error') return 'text-red-300';
+  if (status === 'rate_limited') return 'text-amber-300';
+  return 'text-gray-500';
+}
+
 export function JobControls() {
   const { data: jobs, isLoading } = useJobs();
   const toggleJob = useToggleJob();
@@ -139,6 +155,13 @@ export function JobControls() {
                     <span className="text-[11px] text-red-400">Not registered</span>
                   )}
                 </div>
+                {!job.running && job.runtime_finished_at && (
+                  <div className={`mt-1 text-[11px] ${lastRunColor(job.runtime_status)}`}>
+                    Last run {formatAgo(job.runtime_finished_at)}
+                    {job.runtime_status ? ` · ${job.runtime_status}` : ''}
+                    {job.runtime_message ? ` — ${job.runtime_message}` : ''}
+                  </div>
+                )}
                 {job.running && (
                   <div className="mt-2 space-y-1.5">
                     <div className="flex items-center justify-between text-[11px] text-gray-400">