Server-side pagination for /assets (50/page), fix duplicated manufacturer in model labels

listAssetItems() now takes {page, pageSize, status, modelId, categoryId,
areaId, search} and returns {items, total} instead of the whole table --
was a bare unpaginated findMany(), shipping all ~613 rows on every page
load. Filtering moved server-side into the same WHERE clause so 'total'
reflects the filtered count, not the table's overall size -- pagination
controls stay correct regardless of which filters are active. 'search'
matches serialNumber, assetTag, or the current (non-returned) assignee's
name via the assignments relation in one query.

GET /api/assets is now the one entity route whose response is not a bare
array (see use-api-list.ts) -- its {items, total} shape needs 'total' for
page controls, so /assets fetches it directly instead of through
useApiList. Query params: page, pageSize, status, modelId, categoryId,
areaId, search.

/assets page: search is debounced 300ms (was firing a request per
keystroke otherwise), changing any filter resets to page 1, added
Previous/Next controls + "showing X-Y / total" count. Row # is now a
running index across pages, not per-page.

Separately: all 135 AssetModel rows from the 2026-08-24 real-data import
have the manufacturer name baked into 'name' already (the source file's
own Model column did, e.g. name="Bose Soundlink Revolve" manufacturer=
"Bose") -- rendering "manufacturer name" everywhere doubled it
("Bose Bose Soundlink Revolve"). Fixed at the display layer
(formatModelLabel(), skips the manufacturer prefix when name already
starts with it) rather than a data migration -- non-destructive, handles
every affected row uniformly, reversible.

Smoke-tested listAssetItems() directly (tsx): page1/page2 have zero
overlap, status filter count matches (71 in_stock), asset-tag search
finds exactly 1 row, assignee-name search correctly joins through
Assignment (4 rows for one employee), last page (13 of 613/50) has the
expected remainder of 13 rows.

tsc/lint clean, no Vitest coverage -- same deviation as the rest of this
branch, see CLAUDE.md.

src/app/api/assets/route.ts

@@ -1,6 +1,11 @@
 import { NextResponse } from "next/server";
 import { auth } from "@/auth";
-import { createAssetItem, listAssetItems, validateCreateAssetItemInput } from "@/lib/assets";
+import {
+  createAssetItem,
+  listAssetItems,
+  validateCreateAssetItemInput,
+  type AssetItemStatus,
+} from "@/lib/assets";
 
 // Mirrors src/app/api/employees/route.ts's pattern — middleware.ts excludes
 // /api from route protection, so this checks the session itself. Flat
@@ -59,12 +64,37 @@ export async function POST(request: Request): Promise<NextResponse> {
   return NextResponse.json(created.value, { status: 201 });
 }
 
-export async function GET(): Promise<NextResponse> {
+// The one entity route in this app whose GET response is NOT a bare array
+// (see src/hooks/use-api-list.ts's doc comment on that being the norm
+// everywhere else) -- it's `{items, total}` instead, because /assets is
+// paginated (2026-08-25, see listAssetItems()'s doc comment) and the
+// client needs `total` to render page controls. src/app/assets/page.tsx
+// fetches this directly rather than through useApiList for that reason.
+export async function GET(request: Request): Promise<NextResponse> {
   const session = await auth();
   if (!session) {
     return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
   }
 
-  const assetItems = await listAssetItems();
-  return NextResponse.json(assetItems, { status: 200 });
+  const url = new URL(request.url);
+  const params = url.searchParams;
+  const page = params.has("page") ? Number(params.get("page")) : undefined;
+  const pageSize = params.has("pageSize") ? Number(params.get("pageSize")) : undefined;
+  const status = params.get("status") ?? undefined;
+  const modelId = params.get("modelId") ?? undefined;
+  const categoryId = params.get("categoryId") ?? undefined;
+  const areaId = params.get("areaId") ?? undefined;
+  const search = params.get("search") ?? undefined;
+
+  const validStatuses = ["in_stock", "assigned", "repair", "retired", "lost"];
+  const result = await listAssetItems({
+    page,
+    pageSize,
+    status: status && validStatuses.includes(status) ? (status as AssetItemStatus) : undefined,
+    modelId,
+    categoryId,
+    areaId,
+    search,
+  });
+  return NextResponse.json(result, { status: 200 });
 }

src/app/assets/page.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useMemo, useState, type FormEvent } from "react";
+import { useEffect, useMemo, useState, type FormEvent } from "react";
 import { useApiList } from "@/hooks/use-api-list";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
@@ -114,14 +114,24 @@ function formatDateMMDDYYYY(isoString: string | null): string {
   return `${mm}/${dd}/${yyyy}`;
 }
 
-export default function AssetsPage() {
-  const {
-    data: assetItems,
-    loading,
-    error,
-    refetch,
-  } = useApiList<AssetItemRecord>("/api/assets");
+// "Manufacturer Name" for display -- except a chunk of AssetModel rows
+// from the 2026-08-24 real-data import already have the manufacturer
+// baked into `name` (the source file's own "Model" column did this for
+// some rows, e.g. name="Logitech Group" with manufacturer="Logitech"),
+// which without this check renders as "Logitech Logitech Group". Skip the
+// manufacturer prefix when `name` already starts with it, case-insensitive.
+function formatModelLabel(manufacturer: string, name: string): string {
+  const normalizedName = name.trim().toLowerCase();
+  const normalizedManufacturer = manufacturer.trim().toLowerCase();
+  if (normalizedManufacturer && normalizedName.startsWith(normalizedManufacturer)) {
+    return name;
+  }
+  return `${manufacturer} ${name}`;
+}
 
+const ASSET_ITEMS_PAGE_SIZE = 50;
+
+export default function AssetsPage() {
   const { data: assetModels } = useApiList<AssetModelRecord>("/api/asset-models");
   const { data: assetCategories } = useApiList<AssetCategoryRecord>("/api/asset-categories");
   const { data: purchaseOrders } = useApiList<PurchaseOrderRecord>("/api/purchase-orders");
@@ -142,22 +152,106 @@ export default function AssetsPage() {
   const [submitting, setSubmitting] = useState(false);
   const [submitError, setSubmitError] = useState<string | null>(null);
 
-  // Filter/search state -- client-side only (assetItems is already the
-  // full list from useApiList, and this app's actual scale, ~600 rows
-  // after the 2026-08-24 real-data import, is well within "just filter
-  // in memory" territory; no need for a server-side filtered endpoint).
+  // Filter/search + pagination state (2026-08-25 -- was client-side-only
+  // filtering over the full ~600+-row table; moved server-side, see
+  // src/lib/assets.ts's listAssetItems() doc comment for why). searchText
+  // is debounced into debouncedSearchText so typing doesn't fire a
+  // request per keystroke.
   const [searchText, setSearchText] = useState("");
+  const [debouncedSearchText, setDebouncedSearchText] = useState("");
   const [filterStatus, setFilterStatus] = useState("all");
   const [filterCategoryId, setFilterCategoryId] = useState("all");
   const [filterModelId, setFilterModelId] = useState("all");
   const [filterAreaId, setFilterAreaId] = useState("all");
+  const [page, setPage] = useState(1);
+
+  const [assetItems, setAssetItems] = useState<AssetItemRecord[]>([]);
+  const [assetItemsTotal, setAssetItemsTotal] = useState(0);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [refreshKey, setRefreshKey] = useState(0);
+
+  function refetch() {
+    setRefreshKey((k) => k + 1);
+  }
+
+  useEffect(() => {
+    const timeout = setTimeout(() => setDebouncedSearchText(searchText.trim()), 300);
+    return () => clearTimeout(timeout);
+  }, [searchText]);
+
+  // A filter changing invalidates whatever page we were on -- e.g. page 3
+  // of an unfiltered list may not exist at all once a filter narrows the
+  // result set. Reset to page 1 rather than showing an empty/stale page.
+  useEffect(() => {
+    setPage(1);
+  }, [debouncedSearchText, filterStatus, filterCategoryId, filterModelId, filterAreaId]);
+
+  useEffect(() => {
+    let cancelled = false;
+
+    async function load() {
+      setLoading(true);
+      setError(null);
+      const params = new URLSearchParams();
+      params.set("page", String(page));
+      params.set("pageSize", String(ASSET_ITEMS_PAGE_SIZE));
+      if (filterStatus !== "all") params.set("status", filterStatus);
+      if (filterCategoryId !== "all") params.set("categoryId", filterCategoryId);
+      if (filterModelId !== "all") params.set("modelId", filterModelId);
+      if (filterAreaId !== "all") params.set("areaId", filterAreaId);
+      if (debouncedSearchText) params.set("search", debouncedSearchText);
+
+      try {
+        const response = await fetch(`/api/assets?${params.toString()}`);
+        let body: unknown;
+        try {
+          body = await response.json();
+        } catch {
+          body = null;
+        }
+        if (cancelled) return;
+        if (!response.ok) {
+          const message =
+            body !== null &&
+            typeof body === "object" &&
+            "error" in body &&
+            typeof (body as { error: unknown }).error === "string"
+              ? (body as { error: string }).error
+              : "Request failed";
+          setError(message);
+          setAssetItems([]);
+          setAssetItemsTotal(0);
+          return;
+        }
+        const parsed = body as { items?: AssetItemRecord[]; total?: number };
+        setAssetItems(Array.isArray(parsed.items) ? parsed.items : []);
+        setAssetItemsTotal(typeof parsed.total === "number" ? parsed.total : 0);
+      } catch {
+        if (!cancelled) {
+          setError("Request failed");
+          setAssetItems([]);
+          setAssetItemsTotal(0);
+        }
+      } finally {
+        if (!cancelled) setLoading(false);
+      }
+    }
+
+    void load();
+    return () => {
+      cancelled = true;
+    };
+  }, [page, filterStatus, filterCategoryId, filterModelId, filterAreaId, debouncedSearchText, refreshKey]);
+
+  const totalPages = Math.max(1, Math.ceil(assetItemsTotal / ASSET_ITEMS_PAGE_SIZE));
 
   // modelId -> "Manufacturer Name" -- avoids showing the raw model_id UUID
   // in the table (2026-08-25 -- was previously the literal FK value).
   const modelNameById = useMemo(() => {
     const map = new Map<string, string>();
     for (const m of assetModels) {
-      map.set(m.id, `${m.manufacturer} ${m.name}`);
+      map.set(m.id, formatModelLabel(m.manufacturer, m.name));
     }
     return map;
   }, [assetModels]);
@@ -222,32 +316,9 @@ export default function AssetsPage() {
     return map;
   }, [assignments, employeeNameById]);
 
-  const filteredAssetItems = useMemo(() => {
-    const query = searchText.trim().toLowerCase();
-    return assetItems.filter((item) => {
-      if (filterStatus !== "all" && item.status !== filterStatus) return false;
-      if (filterModelId !== "all" && item.model_id !== filterModelId) return false;
-      if (filterCategoryId !== "all" && modelCategoryById.get(item.model_id) !== filterCategoryId) {
-        return false;
-      }
-      if (filterAreaId !== "all" && item.area_id !== filterAreaId) return false;
-      if (query) {
-        const assignee = assigneeNameByAssetItemId.get(item.id) ?? "";
-        const haystack = `${item.serial_number} ${item.asset_tag ?? ""} ${assignee}`.toLowerCase();
-        if (!haystack.includes(query)) return false;
-      }
-      return true;
-    });
-  }, [
-    assetItems,
-    searchText,
-    filterStatus,
-    filterModelId,
-    filterCategoryId,
-    filterAreaId,
-    modelCategoryById,
-    assigneeNameByAssetItemId,
-  ]);
+  // Filtering + pagination both happen server-side now (see the effect
+  // above) -- `assetItems` here is already exactly the current page's
+  // rows for the active filters, nothing left to compute client-side.
 
   const [importStatus, setImportStatus] = useState<"idle" | "uploading" | "done" | "error">(
     "idle"
@@ -431,7 +502,7 @@ export default function AssetsPage() {
                 <SelectItem value="all">All</SelectItem>
                 {modelsForCategoryFilter.map((assetModel) => (
                   <SelectItem key={assetModel.id} value={assetModel.id}>
-                    {assetModel.manufacturer} {assetModel.name}
+                    {formatModelLabel(assetModel.manufacturer, assetModel.name)}
                   </SelectItem>
                 ))}
               </SelectContent>
@@ -456,7 +527,12 @@ export default function AssetsPage() {
           </div>
 
           <p className="pb-2 text-sm text-muted-foreground">
-            {filteredAssetItems.length} / {assetItems.length} assets
+            {assetItemsTotal === 0
+              ? "0 assets"
+              : `${(page - 1) * ASSET_ITEMS_PAGE_SIZE + 1}-${Math.min(
+                  page * ASSET_ITEMS_PAGE_SIZE,
+                  assetItemsTotal
+                )} / ${assetItemsTotal} assets`}
           </p>
         </div>
 
@@ -483,9 +559,9 @@ export default function AssetsPage() {
               </TableRow>
             </TableHeader>
             <TableBody>
-              {filteredAssetItems.map((assetItem, index) => (
+              {assetItems.map((assetItem, index) => (
                 <TableRow key={assetItem.id}>
-                  <TableCell>{index + 1}</TableCell>
+                  <TableCell>{(page - 1) * ASSET_ITEMS_PAGE_SIZE + index + 1}</TableCell>
                   <TableCell>{assetItem.serial_number}</TableCell>
                   <TableCell>{assetItem.asset_tag ?? "-"}</TableCell>
                   <TableCell>{modelNameById.get(assetItem.model_id) ?? assetItem.model_id}</TableCell>
@@ -508,6 +584,32 @@ export default function AssetsPage() {
             </TableBody>
           </Table>
         )}
+
+        {!loading && !error && assetItemsTotal > 0 ? (
+          <div className="flex items-center gap-3">
+            <Button
+              type="button"
+              variant="outline"
+              size="sm"
+              disabled={page <= 1}
+              onClick={() => setPage((p) => Math.max(1, p - 1))}
+            >
+              Previous
+            </Button>
+            <p className="text-sm text-muted-foreground">
+              Page {page} / {totalPages}
+            </p>
+            <Button
+              type="button"
+              variant="outline"
+              size="sm"
+              disabled={page >= totalPages}
+              onClick={() => setPage((p) => Math.min(totalPages, p + 1))}
+            >
+              Next
+            </Button>
+          </div>
+        ) : null}
       </section>
 
       <section className="flex max-w-2xl flex-col gap-3">
@@ -593,7 +695,7 @@ export default function AssetsPage() {
               <SelectContent>
                 {assetModels.map((assetModel) => (
                   <SelectItem key={assetModel.id} value={assetModel.id}>
-                    {assetModel.manufacturer} {assetModel.name}
+                    {formatModelLabel(assetModel.manufacturer, assetModel.name)}
                   </SelectItem>
                 ))}
               </SelectContent>

src/lib/assets.ts

@@ -291,11 +291,72 @@ export async function createAssetItem(
   }
 }
 
-export async function listAssetItems(): Promise<AssetItemRecord[]> {
-  const rows = await prisma.assetItem.findMany({
-    orderBy: [{ createdAt: "desc" }, { id: "desc" }],
-  });
-  return rows.map(toRecord);
+export interface ListAssetItemsOptions {
+  page?: number;
+  pageSize?: number;
+  status?: AssetItemStatus;
+  modelId?: string;
+  categoryId?: string;
+  areaId?: string;
+  // Matches serialNumber, assetTag, or the name of the AssetItem's current
+  // (non-returned) assignee -- via the assignments relation, not a
+  // separate query, so this stays one round trip.
+  search?: string;
+}
+
+export interface ListAssetItemsResult {
+  items: AssetItemRecord[];
+  total: number;
+}
+
+const DEFAULT_PAGE_SIZE = 50;
+
+/**
+ * Lists AssetItems with server-side filtering + pagination (2026-08-25 --
+ * was a bare unpaginated findMany(); at ~600+ rows post the 2026-08-24
+ * real-data import, shipping the whole table to the client on every page
+ * load was wasteful, and /assets's client-side filtering couldn't scale
+ * past "the whole table is already in memory" anyway). Filtering and
+ * pagination both happen in the same WHERE clause -- `total` reflects the
+ * FILTERED count, not the table's overall size, so pagination controls
+ * built from it are correct regardless of which filters are active.
+ */
+export async function listAssetItems(
+  options: ListAssetItemsOptions = {}
+): Promise<ListAssetItemsResult> {
+  const page = options.page && options.page > 0 ? Math.floor(options.page) : 1;
+  const pageSize =
+    options.pageSize && options.pageSize > 0 ? Math.floor(options.pageSize) : DEFAULT_PAGE_SIZE;
+
+  const where: Prisma.AssetItemWhereInput = {};
+  if (options.status) where.status = options.status;
+  if (options.modelId) where.modelId = options.modelId;
+  if (options.categoryId) where.model = { categoryId: options.categoryId };
+  if (options.areaId) where.areaId = options.areaId;
+  if (options.search && options.search.trim() !== "") {
+    const q = options.search.trim();
+    where.OR = [
+      { serialNumber: { contains: q, mode: "insensitive" } },
+      { assetTag: { contains: q, mode: "insensitive" } },
+      {
+        assignments: {
+          some: { returnedAt: null, employee: { name: { contains: q, mode: "insensitive" } } },
+        },
+      },
+    ];
+  }
+
+  const [rows, total] = await Promise.all([
+    prisma.assetItem.findMany({
+      where,
+      orderBy: [{ createdAt: "desc" }, { id: "desc" }],
+      skip: (page - 1) * pageSize,
+      take: pageSize,
+    }),
+    prisma.assetItem.count({ where }),
+  ]);
+
+  return { items: rows.map(toRecord), total };
 }
 
 // ---------------------------------------------------------------------