fix(ui,ops): TransportPrefsCard import path + fleet unpair script

- TransportPrefsCard.vue: import from '@/api/rpc-client' (not
  '@/api/rpc') so vue-tsc resolves the module during build.
- scripts/fleet-fips-unpair.sh: companion to the fleet-pair script —
  rewrites each node's fips.yaml to anchor-only (fips.v0l.io) so we
  can prove the general-case deployment works without the LAN
  fast-path. Prints per-node peer counts + DHT AAAA resolution for
  every cross-node pair after the change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

neode-ui/src/views/settings/TransportPrefsCard.vue

@@ -44,7 +44,7 @@
 
 <script setup lang="ts">
 import { onMounted, ref } from 'vue'
-import { rpcClient } from '@/api/rpc'
+import { rpcClient } from '@/api/rpc-client'
 
 type Pref = 'auto' | 'fips' | 'tor'
 type Service = 'federation' | 'peers' | 'peer_files' | 'messaging' | 'mesh_file_sharing'