chore: import upstream snapshot with attribution

apps/sim/app/workspace/[workspaceId]/home/prefetch.ts

@@ -0,0 +1,51 @@
+import type { QueryClient } from '@tanstack/react-query'
+import type { FolderApi } from '@/lib/api/contracts'
+import type { ListWorkspaceFilesResponse } from '@/lib/api/contracts/workspace-files'
+import { prefetchInternalJson } from '@/app/workspace/[workspaceId]/lib/prefetch-internal-fetch'
+import { FOLDER_LIST_STALE_TIME, mapFolder } from '@/hooks/queries/folders'
+import { folderKeys } from '@/hooks/queries/utils/folder-keys'
+import {
+  WORKSPACE_FILES_LIST_STALE_TIME,
+  workspaceFilesKeys,
+} from '@/hooks/queries/workspace-files'
+
+/**
+ * Prefetches the home page's secondary lists — folders and workspace files —
+ * under the same query keys their client hooks (`useFolders`,
+ * `useWorkspaceFiles`) use, so the home view paints populated on first render.
+ *
+ * The workflow list (`workflowKeys.list(ws, 'active')`) is already hydrated by
+ * the workspace sidebar prefetch and is intentionally not repeated here.
+ *
+ * Folders are fetched through the route and mapped with the same `mapFolder`
+ * the hook applies, matching its cached shape (string dates → `Date`). Files
+ * carry `Date` fields, so they go through the route and cache the serialized
+ * wire shape — see {@link prefetchInternalJson}.
+ */
+export async function prefetchHomeLists(
+  queryClient: QueryClient,
+  workspaceId: string
+): Promise<void> {
+  await Promise.all([
+    queryClient.prefetchQuery({
+      queryKey: folderKeys.list(workspaceId, 'active'),
+      queryFn: async () => {
+        const { folders } = await prefetchInternalJson<{ folders?: FolderApi[] }>(
+          `/api/folders?workspaceId=${workspaceId}&scope=active`
+        )
+        return (folders ?? []).map(mapFolder)
+      },
+      staleTime: FOLDER_LIST_STALE_TIME,
+    }),
+    queryClient.prefetchQuery({
+      queryKey: workspaceFilesKeys.list(workspaceId, 'active'),
+      queryFn: async () => {
+        const data = await prefetchInternalJson<ListWorkspaceFilesResponse>(
+          `/api/workspaces/${workspaceId}/files?scope=active`
+        )
+        return data.success ? data.files : []
+      },
+      staleTime: WORKSPACE_FILES_LIST_STALE_TIME,
+    }),
+  ])
+}