test(ui): adapt SWR contract tests to the cached-resource layer — 692/692

The keeps-data-visible-while-refreshing tests for PeerFiles, Server, and
LightningChannels mounted without Pinia (the converted components now
pull the resources store in setup) — add createPinia to the mounts.
LightningChannelsPanel: refresh the main channel list before the closed
history so the primary entry gets the first response, and null-guard
both fetchers' response shapes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/views/__tests__/PeerFilesRefresh.test.ts

@@ -1,5 +1,6 @@
 import { flushPromises, mount } from '@vue/test-utils'
 import { describe, expect, it, vi } from 'vitest'
+import { createPinia } from 'pinia'
 import PeerFiles from '../PeerFiles.vue'
 import { rpcClient } from '@/api/rpc-client'
 
@@ -55,6 +56,8 @@ describe('PeerFiles', () => {
     const wrapper = mount(PeerFiles, {
       props: { peerId: 'peer.onion' },
       global: {
+        // The shared peer-browse cache lives in the Pinia resources store.
+        plugins: [createPinia()],
         stubs: {
           Teleport: true,
         },