Extract cleanParams helper to deduplicate query param cleaning

The identical strip-undefined-values loop was duplicated in useTickets
and useTicketsPaged.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/src/api/queries.ts

@@ -27,14 +27,20 @@ export const qk = {
   analytics: (window: number) => ['analytics', window] as const,
 };
 
-// ── Tickets ──────────────────────────────────────────────────────────────────
+// ── Helpers ─────────────────────────────────────────────────────────────────
 
-export function useTickets(params: Record<string, string | number | undefined> = {}) {
-  // Strip undefined values for a stable key
+function cleanParams(params: Record<string, string | number | undefined>): Record<string, string | number> {
   const clean: Record<string, string | number> = {};
   Object.entries(params).forEach(([k, v]) => {
     if (v !== undefined && v !== '' && v !== null) clean[k] = v;
   });
+  return clean;
+}
+
+// ── Tickets ──────────────────────────────────────────────────────────────────
+
+export function useTickets(params: Record<string, string | number | undefined> = {}) {
+  const clean = cleanParams(params);
 
   return useQuery({
     queryKey: qk.tickets(clean),
@@ -47,10 +53,7 @@ export function useTickets(params: Record<string, string | number | undefined> =
 }
 
 export function useTicketsPaged(params: Record<string, string | number | undefined> = {}) {
-  const clean: Record<string, string | number> = {};
-  Object.entries(params).forEach(([k, v]) => {
-    if (v !== undefined && v !== '' && v !== null) clean[k] = v;
-  });
+  const clean = cleanParams(params);
 
   return useQuery({
     queryKey: qk.ticketsPaged(clean),