feat(clients,routing): label inbounds by remark with tag fallback

Inbound pickers and chips across the Users area, the inbounds attach-clients modals, and the routing rule inbound-tags selector showed the auto-generated tag (in-443-tcp). Show the inbound remark when set, falling back to the tag.

Only display labels change; option values keep using the inbound id (or tag for routing rules, which match inbounds by tag), so filtering, attaching, and saved rules are unaffected. Routing reads remarks via a shared useInboundOptions hook that reuses the existing options query cache.

frontend/src/pages/clients/BulkAttachInboundsModal.tsx

@@ -36,7 +36,7 @@ export default function BulkAttachInboundsModal({
       .filter((ib) => MULTI_USER_PROTOCOLS.has((ib.protocol || '').toLowerCase()))
       .map((ib) => ({
         value: ib.id,
-        label: ib.tag,
+        label: ib.remark?.trim() || ib.tag || '',
       }));
   }, [inbounds]);