Add 600ms debounce to search in usePaginatedList

- Typing updates the input immediately but delays the API call
- Table keeps showing current results until the search settles
- Resets to page 1 when search changes
- Applies to all list pages using the shared hook

src/hooks/usePaginatedList.js

@@ -1,27 +1,38 @@
-import { useCallback, useEffect, useMemo, useState } from "react";
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 
 export default function usePaginatedList(fetchFn, extraParams = {}) {
   const [rows, setRows] = useState([]);
   const [search, setSearch] = useState("");
+  const [debouncedSearch, setDebouncedSearch] = useState("");
   const [page, setPage] = useState(1);
   const [pageSize, setPageSize] = useState(12);
   const [totalCount, setTotalCount] = useState(0);
   const [loading, setLoading] = useState(true);
   const [err, setErr] = useState("");
+  const debounceRef = useRef(null);
 
   const extraKey = JSON.stringify(extraParams);
 
+  useEffect(() => {
+    if (debounceRef.current) clearTimeout(debounceRef.current);
+    debounceRef.current = setTimeout(() => {
+      setDebouncedSearch(search);
+      setPage(1);
+    }, 600);
+    return () => clearTimeout(debounceRef.current);
+  }, [search]);
+
   const reload = useCallback(() => {
     setLoading(true);
     setErr("");
-    fetchFn({ search, page, pageSize, ...extraParams })
+    fetchFn({ search: debouncedSearch, page, pageSize, ...extraParams })
       .then(({ rows, totalCount }) => {
         setRows(rows);
         setTotalCount(totalCount);
       })
       .catch((e) => setErr(e.message || "Failed to load"))
       .finally(() => setLoading(false));
-  }, [fetchFn, search, page, pageSize, extraKey]);
+  }, [fetchFn, debouncedSearch, page, pageSize, extraKey]);
 
   useEffect(() => { reload(); }, [reload]);