Display current selection count

src/frontend/src/components/views/AdminSubmissionsCard.tsx

@@ -331,6 +331,11 @@ export default function AdminSubmissionsCard({
         wrap
         style={{ marginTop: 12 }}
       >
+        <Text type="secondary">
+          {selectedCount > 0
+            ? `${selectedCount} of ${submissions.length} orders selected`
+            : `${submissions.length} order${submissions.length === 1 ? "" : "s"}`}
+        </Text>
         {totalEstimatedText ? (
           <Tooltip title="Rough estimate based on menu prices. Final amount may differ.">
             <Text type="secondary">