feat(bridge-monitoring): show inventory shortfall for queued releases

Surface mission-control bridge_inventory scope, wei shortfall fields, and
relay card formatting for WETH display.

Made-with: Cursor

frontend/src/services/api/missionControl.ts

@@ -16,6 +16,16 @@ export interface MissionControlRelayItemSummary {
 
 export interface MissionControlRelaySnapshot {
   status?: string
+  last_error?: {
+    scope?: string
+    message?: string
+    message_id?: string
+    target_bridge?: string
+    token?: string
+    available_amount?: string
+    required_amount?: string
+    shortfall?: string
+  }
   monitoring?: {
     delivery_enabled?: boolean
     shedding?: boolean
@@ -135,6 +145,11 @@ function relativeAge(isoString?: string): string {
 }
 
 function describeRelayStatus(snapshot: MissionControlRelaySnapshot, status: string): string {
+  if (snapshot.last_error?.scope === 'bridge_inventory') {
+    return snapshot.queue?.size && snapshot.queue.size > 0
+      ? 'underfunded queued release'
+      : 'underfunded release'
+  }
   if (status === 'paused' && snapshot.monitoring?.delivery_enabled === false) {
     return snapshot.queue?.size && snapshot.queue.size > 0 ? 'delivery paused (queueing)' : 'delivery paused'
   }