fix: stratum deadlock + contrib-row CSS + README update for recent features

server/web/src/components/Fleet/FleetPanels.tsx

@@ -230,7 +230,7 @@ export function ContributionBars({
           const agentXmr = xmrPerDay != null ? xmrPerDay * (b.pct / 100) : null;
           const agentUsd = agentXmr != null && xmrPrice ? agentXmr * xmrPrice : null;
           return (
-            <div key={b.id} className="contrib-row">
+            <div key={b.id} className={`contrib-row${agentUsd != null ? ' has-usd' : ''}`}>
               <span className="contrib-name" title={b.name}>{b.name}</span>
               <div className="contrib-track">
                 <div className="contrib-fill" style={{ width: `${b.pct}%` }} />