Improve explorer subsystem posture and wallet visibility

frontend/src/components/explorer/BridgeMonitoringPage.tsx

@@ -14,6 +14,7 @@ import { explorerFeaturePages } from '@/data/explorerOperations'
 import { summarizeChainActivity } from '@/utils/activityContext'
 import ActivityContextPanel from '@/components/common/ActivityContextPanel'
 import FreshnessTrustNote from '@/components/common/FreshnessTrustNote'
+import SubsystemPosturePanel from '@/components/common/SubsystemPosturePanel'
 import { resolveEffectiveFreshness } from '@/utils/explorerFreshness'
 
 type FeedState = 'connecting' | 'live' | 'fallback'
@@ -288,6 +289,13 @@ export default function BridgeMonitoringPage({
           bridgeStatus={bridgeStatus}
           scopeLabel="Bridge relay posture is shown alongside the same explorer freshness model used on the homepage and core explorer routes"
         />
+        <SubsystemPosturePanel
+          className="mt-3"
+          subsystems={bridgeStatus?.data?.subsystems}
+          title="Bridge Subsystem Posture"
+          preferredKeys={['rpc_head', 'tx_index', 'bridge_relay_monitoring', 'stats_summary', 'freshness_queries']}
+          scopeLabel="These bridge-facing subsystem signals show whether the limiting factor is public head visibility, transaction indexing, relay monitoring, or degraded freshness queries."
+        />
       </div>
 
       <div className="mb-6 grid gap-4 lg:grid-cols-3">