feat: live-updating status panel with per-task poll timings

- Each service fetch is individually timed (SABnzbd, Sonarr, Radarr, qBit)
- Status panel shows timing bar chart with ms per task and total
- Shows 'Last Poll' age that updates live
- Shows client refresh rate (1s/5s/10s/Off)
- Status panel auto-refreshes in sync with dashboard refresh cycle
- Changing refresh rate restarts the status panel refresh too
- TTL counters update live on each refresh

public/style.css

@@ -862,6 +862,51 @@ body {
   font-size: 0.7rem;
 }
 
+.status-timings {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.timing-row {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 0.78rem;
+}
+
+.timing-label {
+  width: 110px;
+  flex-shrink: 0;
+  color: var(--text-secondary);
+  white-space: nowrap;
+}
+
+.timing-bar-bg {
+  flex: 1;
+  height: 8px;
+  background: var(--border);
+  border-radius: 4px;
+  overflow: hidden;
+}
+
+.timing-bar {
+  height: 100%;
+  background: var(--accent);
+  border-radius: 4px;
+  min-width: 2px;
+  transition: width 0.3s ease;
+}
+
+.timing-value {
+  width: 50px;
+  flex-shrink: 0;
+  text-align: right;
+  color: var(--text-primary);
+  font-weight: 500;
+  font-size: 0.75rem;
+}
+
 .status-loading, .status-error {
   text-align: center;
   padding: 20px;