feat(nav): put Collection Pool entry back in the sidebar

LogisticsItems had Collection Map and Collection Confirm but no
Collection Pool, mirroring the post-deletion state from WFDASH_NEXTJS.
Without an entry the /collection-pool page is reachable by URL but
invisible from the nav menu, so operators wouldn't know it exists.

The icon () wasn't in the existing lucide-react named-imports
list — checked the file first (it was) so no import change needed.

Adding the entry doesn't need the PB  collection
itself to exist; the link will 404 until that migration runs, but
that's still better than the entry being absent.

Pushes on top of 811493b (the page+service commit).

src/components/sidebar.tsx

@@ -84,6 +84,7 @@ const orderItems: NavEntry[] = [
 // the actual lifecycle: orders originate in Orders, become physical
 // work here in Logistics, then close out in Operations (invoicing).
 const logisticsItems: NavEntry[] = [
+  { href: "/collection-pool", label: "Collection Pool", icon: Package },
   { href: "/collection-map", label: "Collection Map", icon: MapPin },
   { href: "/collection-confirm", label: "Collection Confirm", icon: CheckCircle },
 ];