Add transaction status indicators to moderation UI

Implement visual indicators in the moderation queue and review manager to display the status of ongoing transactions. This includes states for processing, timeout, and cached results, providing users with clearer feedback on the system's activity.

src/components/moderation/renderers/QueueItemHeader.tsx

@@ -5,6 +5,7 @@ import { Button } from '@/components/ui/button';
 import { UserAvatar } from '@/components/ui/user-avatar';
 import { Tooltip, TooltipContent, TooltipTrigger } from '@/components/ui/tooltip';
 import { ValidationSummary } from '../ValidationSummary';
+import { TransactionStatusIndicator, type TransactionStatus } from '../TransactionStatusIndicator';
 import { format } from 'date-fns';
 import type { ModerationItem } from '@/types/moderation';
 import type { ValidationResult } from '@/lib/entityValidationSchemas';
@@ -16,6 +17,8 @@ interface QueueItemHeaderProps {
   isLockedByOther: boolean;
   currentLockSubmissionId?: string;
   validationResult: ValidationResult | null;
+  transactionStatus?: TransactionStatus;
+  transactionMessage?: string;
   onValidationChange: (result: ValidationResult) => void;
   onViewRawData?: () => void;
 }
@@ -38,6 +41,8 @@ export const QueueItemHeader = memo(({
   isLockedByOther,
   currentLockSubmissionId,
   validationResult,
+  transactionStatus = 'idle',
+  transactionMessage,
   onValidationChange,
   onViewRawData
 }: QueueItemHeaderProps) => {
@@ -105,6 +110,11 @@ export const QueueItemHeader = memo(({
               Claimed by You
             </Badge>
           )}
+          <TransactionStatusIndicator
+            status={transactionStatus}
+            message={transactionMessage}
+            showLabel={!isMobile}
+          />
           {item.submission_items && item.submission_items.length > 0 && item.submission_items[0].item_data && (
             <ValidationSummary
               item={{