Fix unread marker flash at chat beginning after sign-in

Keep the skeleton visible during the gap between app load completing
and the first openReport response arriving, preventing the unread
marker from rendering with stale lastReadTime data.

Co-authored-by: Pujan Shah <Pujan92@users.noreply.github.com>

Author: MelvinBot

src/pages/inbox/report/ReportActionsView.tsx

@@ -368,7 +368,8 @@ function ReportActionsView({reportID, onLayout}: ReportActionsViewProps) {
     const shouldShowSkeletonForInitialLoad = isLoadingInitialReportActions && (isReportDataIncomplete || isMissingReportActions) && !isOffline;
 
     // Show skeleton while the app is loading and we're online
-    const shouldShowSkeletonForAppLoad = isLoadingApp && !isOffline;
+    // eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+    const shouldShowSkeletonForAppLoad = (isLoadingApp || (isLoadingInitialReportActions && !hasOnceLoadedReportActions)) && !isOffline;
 
     // Show skeleton for the Concierge side panel until report data has been
     // loaded at least once. Before the first openReport response, hasOlderActions