perf(ticket): paginate and cache detection previews

src/app/(modules)/ticket/[ticketId]/components/TicketAssignmentsCard.tsx

@@ -262,6 +262,7 @@ export function TicketAssignmentsCard({
               {videoId ? (
                 <div className={'mt-4 border-t pt-4'}>
                   <TicketDetectionPreview
+                    key={`${videoId}:${selectedAssignment.id}`}
                     ticketId={ticketId}
                     videoId={videoId}
                     assignmentId={selectedAssignment.id}

src/app/(modules)/ticket/[ticketId]/components/TicketDetectionPreview.tsx

@@ -24,6 +24,8 @@ interface TicketDetectionPreviewProps {
   onDetectionCountChange?: (count: number | undefined) => void;
 }
 
+const DETECTION_PAGE_SIZE = 10;
+
 function DetectionMetadataBar({
   items,
 }: {
@@ -102,6 +104,8 @@ export function TicketDetectionPreview({
   const [currentIndex, setCurrentIndex] = useState(0);
   const [isDiscardDialogOpen, setIsDiscardDialogOpen] = useState(false);
   const isUnassignedPreview = assignmentStatus === 'unassigned';
+  const pageStart =
+    Math.floor(currentIndex / DETECTION_PAGE_SIZE) * DETECTION_PAGE_SIZE;
 
   useEffect(() => {
     setCurrentIndex(0);
@@ -109,23 +113,26 @@ export function TicketDetectionPreview({
 
   const queryParams = useMemo(
     () => ({
-      skip: currentIndex,
-      limit: 1,
+      skip: pageStart,
+      limit: DETECTION_PAGE_SIZE,
       assignment_id: isUnassignedPreview ? undefined : assignmentId,
       assignment_status: isUnassignedPreview
         ? ('unassigned' as const)
         : undefined,
       sort: 'timestamp_asc',
     }),
-    [assignmentId, currentIndex, isUnassignedPreview],
+    [assignmentId, isUnassignedPreview, pageStart],
   );
 
   const detectionsQuery = useTicketDetectionsQuery(
     videoId ?? undefined,
     queryParams,
+    { keepPreviousPage: true },
   );
   const detectionResult = detectionsQuery.data;
-  const activeDetection = detectionResult?.items[0];
+  const activeDetection = detectionsQuery.isPlaceholderData
+    ? undefined
+    : detectionResult?.items[currentIndex - pageStart];
   const confirmedDetectionCount = detectionResult?.total;
   const detectionCount = confirmedDetectionCount ?? 0;
   const activeVisual = getDefectVisual(
@@ -156,12 +163,15 @@ export function TicketDetectionPreview({
   }, [confirmedDetectionCount, currentIndex]);
 
   useEffect(() => {
-    onDetectionCountChange?.(confirmedDetectionCount);
-  }, [confirmedDetectionCount, onDetectionCountChange]);
+    onDetectionCountChange?.(detectionCount);
+  }, [detectionCount, onDetectionCountChange]);
 
   const isNavigationDisabled =
-    detectionCount === 0 || detectionsQuery.isLoading;
-  const isInitialLoading = detectionsQuery.isLoading;
+    detectionCount === 0 ||
+    detectionsQuery.isLoading ||
+    detectionsQuery.isPlaceholderData;
+  const isInitialLoading =
+    detectionsQuery.isLoading || detectionsQuery.isPlaceholderData;
   const isError = detectionsQuery.isError;
   const retry = () => void detectionsQuery.refetch();
 
@@ -221,7 +231,7 @@ export function TicketDetectionPreview({
         </div>
       </div>
 
-      {isInitialLoading && !activeDetection ? (
+      {isInitialLoading ? (
         <TicketDetectionPreviewSkeleton />
       ) : isError ? (
         <div className="rounded-lg border border-dashed border-destructive/40 bg-destructive/5 px-4 py-8 text-center">

src/app/(modules)/ticket/[ticketId]/components/TicketDetectionPreviewCard.tsx

@@ -22,6 +22,7 @@ export function TicketDetectionPreviewCard({
       <CardContent className="p-5">
         <div className="min-w-0">
           <TicketDetectionPreview
+            key={`${videoId}:${assignmentId}`}
             ticketId={ticketId}
             videoId={videoId}
             assignmentId={assignmentId}

src/app/(modules)/ticket/[ticketId]/components/TicketUnassignedIssuesCard.tsx

@@ -47,6 +47,7 @@ export function TicketUnassignedIssuesCard({
       <CardContent className={'p-5'}>
         <div className={'min-w-0'}>
           <TicketDetectionPreview
+            key={`${videoId}:unassigned`}
             ticketId={ticketId}
             videoId={videoId}
             assignmentStatus={'unassigned'}

src/app/(modules)/ticket/[ticketId]/review/components/IssueReviewAction.tsx

@@ -176,13 +176,9 @@ export function IssueReviewAction({
           <div className="grid grid-cols-2 gap-2">
             <Button
               type="button"
-              variant="outline"
+              variant="default"
               disabled={isPending}
               onClick={() => void submitDecision('approve')}
-              className={cn(
-                decision === 'approve' &&
-                  'border-emerald-500 bg-emerald-500/10 text-emerald-700 hover:bg-emerald-500/15 dark:text-emerald-300',
-              )}
             >
               {isPending && decision === 'approve' ? (
                 <Loader2 className="animate-spin" />
@@ -193,13 +189,9 @@ export function IssueReviewAction({
             </Button>
             <Button
               type="button"
-              variant="outline"
+              variant="destructive"
               disabled={isPending}
               onClick={() => void submitDecision('reject')}
-              className={cn(
-                decision === 'reject' &&
-                  'border-destructive bg-destructive/10 text-destructive hover:bg-destructive/15',
-              )}
             >
               {isPending && decision === 'reject' ? (
                 <Loader2 className="animate-spin" />

src/app/(modules)/ticket/hooks/useTicketQueries.ts

@@ -2,6 +2,7 @@
 
 import { useMemo } from 'react';
 import {
+  keepPreviousData,
   useInfiniteQuery,
   useMutation,
   useQuery,
@@ -28,6 +29,11 @@ import { extensionRequestKeys } from '../../extension-requests/queries/extension
 
 const TICKET_TABLE_REFRESH_MS = 5 * 60 * 1000;
 
+interface TicketDetectionsQueryOptions {
+  enabled?: boolean;
+  keepPreviousPage?: boolean;
+}
+
 interface UseTicketsQueryParams {
   skip: number;
   limit: number;
@@ -113,8 +119,9 @@ export function useTicketAssignmentsQuery(
 export function useTicketDetectionsQuery(
   videoId: string | undefined,
   params: VideoDetectionsParams,
-  enabled = true,
+  options: TicketDetectionsQueryOptions = {},
 ) {
+  const { enabled = true, keepPreviousPage = false } = options;
   const queryParams = useMemo(
     () => ({
       skip: params.skip ?? 0,
@@ -143,6 +150,7 @@ export function useTicketDetectionsQuery(
     queryFn: () =>
       videoService.getVideoDetections(videoId as string, queryParams),
     enabled: Boolean(enabled && videoId),
+    placeholderData: keepPreviousPage ? keepPreviousData : undefined,
     staleTime: Infinity,
   });
 }

src/components/data-table/TableHeader.tsx

@@ -16,7 +16,7 @@ import { getPinnedColumnStyles } from './columnStyles';
 
 const TableHeader = <TData, _>({ table }: { table: Table<TData> }) => {
   return (
-    <ShadTableHeader className="sticky top-0 z-20 bg-muted/70 backdrop-blur supports-backdrop-filter:bg-muted/60">
+    <ShadTableHeader className="sticky top-0 z-20 bg-muted">
       {table.getHeaderGroups().map((headerGroup) => (
         <TableRow key={headerGroup.id}>
           {headerGroup.headers.map((header) => {
@@ -39,7 +39,7 @@ const TableHeader = <TData, _>({ table }: { table: Table<TData> }) => {
                   canSort ? header.column.getToggleSortingHandler() : undefined
                 }
                 className={cn(
-                  'h-11 max-w-0 overflow-hidden border-b border-border bg-muted/70 px-4 text-sm font-semibold text-foreground transition-colors',
+                  'h-11 max-w-0 overflow-hidden border-b border-border bg-muted px-4 text-sm font-semibold text-foreground transition-colors',
                   canSort && 'cursor-pointer select-none hover:bg-muted',
                   sortDirection && 'bg-muted',
                 )}

src/components/video/annotatedDetectionImage.tsx

@@ -41,11 +41,7 @@ export default function AnnotatedDetectionImage({
       ]
     : [];
 
-  const aspectRatio =
-    aspectRatioOverride ??
-    (videoWidth > 0 && videoHeight > 0
-      ? `${videoWidth} / ${videoHeight}`
-      : '16 / 9');
+  const aspectRatio = aspectRatioOverride ?? '16 / 9';
 
   const annotatedMedia = objectUrl ? (
     <>
@@ -75,14 +71,7 @@ export default function AnnotatedDetectionImage({
           className="group relative flex w-full cursor-zoom-in items-center justify-center overflow-hidden rounded-lg border bg-black focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2"
           style={{ aspectRatio }}
         >
-          <Image
-            src={objectUrl}
-            alt={`${detection.detection.display_name} detection`}
-            fill
-            unoptimized
-            sizes="(min-width: 1280px) 18rem, (min-width: 640px) 50vw, 100vw"
-            className="object-contain"
-          />
+          {annotatedMedia}
           <span className="pointer-events-none absolute inset-x-0 bottom-0 z-[3] bg-gradient-to-t from-black/70 to-transparent px-3 pb-2 pt-8 text-center text-xs font-medium text-white opacity-0 transition-opacity group-hover:opacity-100 group-focus-visible:opacity-100">
             Click to view annotated image
           </span>