feat(02-02): tracer tab refreshes silently and every side effect is placed

Puts Marketplace.vue's data on the cache and adds the subtle background-
refresh indicator D-05 calls for:

- RefreshIndicator.vue: presentational, state-driven (ResourceLoadState).
  Renders nothing for ready/idle/loading — a first load is the view's own
  skeleton's job, not this component's — and a role="status"
  aria-live="polite" spinner only while refreshing. A fixed-size outer slot
  keeps its appearance/disappearance from ever shifting layout.
- Marketplace.vue: loadCommunityMarketplace()/loadBitcoinPruneStatus() move
  onto useCachedResource behind shared keys app-catalog (300s TTL, persist —
  near-static catalog, D-06 discretion) and bitcoin.prune-status (default
  30s TTL, persist — both non-sensitive/small per T-02-01). app-catalog is a
  shared key so Discover.vue's identical loader picks up the same entry
  without its own conversion in 02-04. Error handling is keep-last-value
  (D-07): a rejected refresh sets the existing communityError banner ref,
  never a toast, and prior app cards stay on screen.
- Side-effect audit (the precedent 02-04 repeats across remaining tabs):
  marketplaceAnimationDone is genuinely once-per-session intro state, stays
  in onMounted; the two data loads needed no onMounted/onActivated hook of
  their own at all — useCachedResource's internal onActivated (wired in
  Task 1) already revalidates them on every kept-alive tab re-entry,
  staleness-gated so a quick revisit issues no fetch. No interval,
  subscription or window listener exists in this view, so no onDeactivated
  teardown was needed either.
- Tests: RefreshIndicator's full render-nothing/render-something matrix
  added to keepAliveTabs.test.ts (no router dependency, safe to colocate).
  The D-07 rejected-refresh-keeps-content-and-no-toast test mounts
  Marketplace.vue itself but lives in a new file,
  views/__tests__/MarketplaceRefresh.test.ts, following the in-repo
  CloudPeersRefresh.test.ts mount-the-view pattern — vi.mock('vue-router')
  is hoisted file-wide, so colocating it in keepAliveTabs.test.ts would
  clobber that file's real createRouter/createMemoryHistory used by the
  DashboardRouterView tests (Rule 3 auto-fix; deviation from the plan's
  literal single-test-file file list, documented here for the SUMMARY).
  Marketplace.vue gains a defineExpose({ loadCommunityMarketplace,
  loadBitcoinPruneStatus }) for tests, mirroring Cloud.vue's existing
  defineExpose({ loadPeers }).

Full suite (87 files / 709 tests), type-check and build all green; the
built Marketplace chunk carries refresh-indicator.

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

neode-ui/src/components/RefreshIndicator.vue

@@ -0,0 +1,60 @@
+<template>
+  <div class="refresh-indicator-slot" aria-hidden="false">
+    <div
+      v-if="state === 'refreshing'"
+      class="refresh-indicator"
+      role="status"
+      aria-live="polite"
+    >
+      <span class="refresh-indicator-spinner" aria-hidden="true" />
+      <span class="sr-only">{{ label ?? 'Refreshing…' }}</span>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import type { ResourceLoadState } from '@/stores/resources'
+
+// Subtle background-refresh indicator (D-05): visible only while a cached
+// resource is revalidating behind already-rendered content. A first load
+// is the view's own skeleton's job, not this component's — 'loading'
+// intentionally renders nothing here, same as 'ready'/'idle'. No stale-age
+// text or "last updated" badge (D-05 rules those out).
+defineProps<{
+  state: ResourceLoadState
+  label?: string
+}>()
+</script>
+
+<style scoped>
+/* Fixed-size outer slot so the indicator appearing/disappearing never
+   shifts surrounding layout — callers can drop this inline without also
+   reserving space themselves. */
+.refresh-indicator-slot {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 1rem;
+  height: 1rem;
+  flex-shrink: 0;
+}
+
+.refresh-indicator {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.refresh-indicator-spinner {
+  width: 0.875rem;
+  height: 0.875rem;
+  border: 2px solid rgba(255, 255, 255, 0.15);
+  border-top-color: rgba(255, 255, 255, 0.55);
+  border-radius: 50%;
+  animation: refresh-indicator-spin 0.8s linear infinite;
+}
+
+@keyframes refresh-indicator-spin {
+  to { transform: rotate(360deg); }
+}
+</style>

neode-ui/src/views/Marketplace.vue

@@ -57,6 +57,7 @@
           :aria-label="t('marketplace.searchApps')"
           class="app-header-search px-4 py-2 bg-white/10 border border-white/20 rounded-lg text-white placeholder-white/50 focus:outline-none focus:border-white/40 transition-colors"
         />
+        <RefreshIndicator :state="catalogResource.entry.loadState" label="Refreshing app store catalog" />
       </div>
 
       <!-- Mobile: categories + search (tabs handled by Dashboard.vue header) -->
@@ -69,6 +70,7 @@
         <div class="flex items-center gap-2 mb-3">
           <span class="discover-terminal-tag">discover</span>
           <h1 class="text-lg font-bold text-white">App Store</h1>
+          <RefreshIndicator :state="catalogResource.entry.loadState" label="Refreshing app store catalog" />
         </div>
         <div class="mobile-category-strip mb-3" aria-label="App Store categories">
           <button
@@ -171,6 +173,8 @@ import { useAppLauncherStore } from '@/stores/appLauncher'
 import { useToast } from '@/composables/useToast'
 import { useCollapsingHeaderTabs } from '@/composables/useCollapsingHeaderTabs'
 import { useContainersScanTimeout } from '@/composables/useContainersScanTimeout'
+import { useCachedResource } from '@/composables/useCachedResource'
+import RefreshIndicator from '@/components/RefreshIndicator.vue'
 import { APP_STORE_CATEGORIES, APP_STORE_SECTIONS } from './appStoreCategories'
 import MarketplaceAppCard from './marketplace/MarketplaceAppCard.vue'
 import {
@@ -231,12 +235,40 @@ watch(() => route.query.category, (category) => {
   }
 })
 
-// Community marketplace state
-const loadingCommunity = ref(false)
-const communityError = ref('')
-const communityApps = ref<MarketplaceApp[]>([])
+// Community marketplace state — cached (D-09/D-06: near-static catalog, long
+// TTL) behind a shared key so Discover.vue's identical loader picks up the
+// same cache entry without its own conversion (plan 02-04). Non-sensitive
+// and small, so it persists across reloads.
+const catalogResource = useCachedResource<MarketplaceApp[]>({
+  key: 'app-catalog',
+  fetcher: async () => getCuratedAppList(),
+  ttlMs: 300_000,
+  persist: true,
+})
+const communityApps = computed(() => catalogResource.data.value ?? [])
+const loadingCommunity = computed(() => catalogResource.entry.loadState === 'loading')
+// Keep-last-value error banner (D-07): a failed background refresh never
+// raises a toast, it only surfaces here — content stays on screen either way.
+const communityError = computed(() => catalogResource.error.value ?? '')
+
+interface BitcoinStatusResponse {
+  blockchain_info?: { pruned?: boolean }
+}
+
+// Prune status — the default TTL (30s) matches the rest of the app; also
+// non-sensitive and small, so it persists too.
+const pruneStatusResource = useCachedResource<BitcoinStatusResponse | null>({
+  key: 'bitcoin.prune-status',
+  fetcher: async (signal) => {
+    const res = await fetch('/bitcoin-status', { credentials: 'include', signal })
+    if (!res.ok) throw new Error(`bitcoin-status responded ${res.status}`)
+    return res.json()
+  },
+  persist: true,
+})
+
 const searchQuery = ref('')
-const bitcoinPruned = ref(false)
+const bitcoinPruned = computed(() => pruneStatusResource.data.value?.blockchain_info?.pruned === true)
 const marketplaceHeaderRef = ref<HTMLElement | null>(null)
 const marketplacePrimaryRef = ref<HTMLElement | null>(null)
 const marketplaceCategoryProbeRef = ref<HTMLElement | null>(null)
@@ -374,23 +406,21 @@ function launchInstalledApp(app: MarketplaceApp) {
   appLauncher.openSession(app.id)
 }
 
+// onMounted fires exactly once for the lifetime of this kept-alive instance
+// (D-01/plan 02-01). marketplaceAnimationDone is genuinely once-per-session
+// intro state, so it stays here. The catalog and prune-status loads used to
+// live here too, fetching fresh on every remount; they're now cache-gated
+// useCachedResource entries whose own onActivated revalidates them on every
+// tab re-entry (staleness-checked, so a quick revisit issues no RPC) — they
+// need no per-view mount/activation hook of their own.
 onMounted(() => {
   marketplaceAnimationDone = true
-  if (communityApps.value.length === 0 && !loadingCommunity.value) {
-    loadCommunityMarketplace()
-  }
-  loadBitcoinPruneStatus()
 })
 
-async function loadBitcoinPruneStatus() {
-  try {
-    const res = await fetch('/bitcoin-status', { credentials: 'include', signal: AbortSignal.timeout(8000) })
-    if (!res.ok) return
-    const status = await res.json()
-    bitcoinPruned.value = status?.blockchain_info?.pruned === true
-  } catch (e) {
-    if (import.meta.env.DEV) console.warn('[Marketplace] Bitcoin prune status unavailable:', e)
-  }
+/** Force-refresh the Bitcoin prune-status cache entry (deduped with any
+ * in-flight refresh, per useCachedResource). Exposed for tests. */
+function loadBitcoinPruneStatus() {
+  return pruneStatusResource.refresh()
 }
 
 function installBlockedReason(appId: string): string | undefined {
@@ -399,12 +429,10 @@ function installBlockedReason(appId: string): string | undefined {
   return electrumxArchiveWarning
 }
 
-async function loadCommunityMarketplace() {
-  loadingCommunity.value = true
-  communityError.value = ''
-  if (import.meta.env.DEV) console.log('Loading Docker-based app marketplace')
-  communityApps.value = getCuratedAppList()
-  loadingCommunity.value = false
+/** Force-refresh the app-catalog cache entry (used by the Retry button and
+ * exposed for tests). */
+function loadCommunityMarketplace() {
+  return catalogResource.refresh()
 }
 
 function viewAppDetails(app: MarketplaceApp) {
@@ -516,6 +544,10 @@ async function installCommunityApp(app: MarketplaceApp) {
   }
 }
 
+// Exposed for tests only (mirrors Cloud.vue's `defineExpose({ loadPeers })`):
+// lets a test trigger a background refresh directly without waiting on TTL
+// staleness or a real KeepAlive round-trip.
+defineExpose({ loadCommunityMarketplace, loadBitcoinPruneStatus })
 </script>
 
 <style scoped>

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

@@ -0,0 +1,92 @@
+import { flushPromises, mount } from '@vue/test-utils'
+import { createPinia } from 'pinia'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import Marketplace from '../Marketplace.vue'
+
+// Mirrors the CloudPeersRefresh.test.ts pattern (in-repo convention for
+// mounting a view directly with its heavier deps mocked at the module
+// boundary) — kept in its own file rather than keepAliveTabs.test.ts because
+// vi.mock('vue-router', ...) is hoisted file-wide and would otherwise
+// clobber that file's real createRouter/createMemoryHistory imports used by
+// the DashboardRouterView tests (Rule 3 auto-fix).
+const routerPushMock = vi.fn()
+const toastErrorMock = vi.fn()
+const toastInfoMock = vi.fn()
+
+vi.mock('vue-router', () => ({
+  useRouter: () => ({ push: routerPushMock, replace: vi.fn().mockResolvedValue(undefined) }),
+  useRoute: () => ({ query: {} }),
+  RouterLink: { name: 'RouterLink', props: ['to'], template: '<a><slot /></a>' },
+}))
+
+vi.mock('vue-i18n', () => ({
+  useI18n: () => ({ t: (key: string) => key }),
+}))
+
+vi.mock('@/stores/app', () => ({
+  useAppStore: () => ({ data: {}, hasLoadedInitialData: true }),
+}))
+
+vi.mock('@/stores/server', () => ({
+  useServerStore: () => ({
+    installingApps: new Map(),
+    setInstallProgress: vi.fn(),
+    clearInstallProgress: vi.fn(),
+  }),
+}))
+
+vi.mock('@/stores/appLauncher', () => ({
+  useAppLauncherStore: () => ({ openSession: vi.fn() }),
+}))
+
+vi.mock('@/composables/useMarketplaceApp', () => ({
+  useMarketplaceApp: () => ({ setCurrentApp: vi.fn() }),
+}))
+
+vi.mock('@/composables/useToast', () => ({
+  useToast: () => ({ success: vi.fn(), error: toastErrorMock, info: toastInfoMock }),
+}))
+
+vi.mock('@/api/rpc-client', () => ({
+  rpcClient: {
+    call: vi.fn(),
+    marketplaceDiscover: vi.fn().mockResolvedValue({ apps: [] }),
+  },
+}))
+
+describe('Marketplace tracer tab: background refresh failure (D-07)', () => {
+  beforeEach(() => {
+    vi.stubGlobal('ResizeObserver', vi.fn(() => ({ observe: vi.fn(), disconnect: vi.fn() })))
+    routerPushMock.mockClear()
+    toastErrorMock.mockClear()
+    toastInfoMock.mockClear()
+  })
+
+  afterEach(() => {
+    vi.unstubAllGlobals()
+  })
+
+  it('keeps the curated catalog on screen and raises no toast when the prune-status background refresh rejects', async () => {
+    vi.stubGlobal('fetch', vi.fn().mockResolvedValueOnce({
+      ok: true,
+      json: () => Promise.resolve({ blockchain_info: { pruned: false } }),
+    }))
+
+    const wrapper = mount(Marketplace, { global: { plugins: [createPinia()] } })
+    await flushPromises()
+
+    expect(wrapper.findAll('.glass-card').length).toBeGreaterThan(0)
+
+    vi.mocked(fetch).mockRejectedValueOnce(new Error('node unreachable'))
+    await (wrapper.vm as unknown as { loadBitcoinPruneStatus: () => Promise<void> }).loadBitcoinPruneStatus()
+    await flushPromises()
+
+    // Prior catalog content is still rendered — a background refresh failure
+    // on an unrelated resource never wipes the view.
+    expect(wrapper.findAll('.glass-card').length).toBeGreaterThan(0)
+    expect(toastErrorMock).not.toHaveBeenCalled()
+    expect(toastInfoMock).not.toHaveBeenCalled()
+
+    wrapper.unmount()
+  })
+})

neode-ui/src/views/dashboard/__tests__/keepAliveTabs.test.ts

@@ -4,6 +4,7 @@ import { defineComponent, h, onActivated, onMounted } from 'vue'
 import { beforeEach, describe, expect, it } from 'vitest'
 import DashboardRouterView from '../DashboardRouterView.vue'
 import { shouldKeepAlive } from '../keepAliveRoutes'
+import RefreshIndicator from '@/components/RefreshIndicator.vue'
 
 let mountCount = 0
 let activateCount = 0
@@ -101,3 +102,27 @@ describe('DashboardRouterView keep-alive behavior', () => {
     expect(shouldKeepAlive({ path: '/dashboard/marketplace/abc' })).toBe(false)
   })
 })
+
+describe('RefreshIndicator', () => {
+  it('renders nothing for ready, idle and loading, and a labeled status element for refreshing', () => {
+    const states = ['ready', 'idle', 'loading'] as const
+    for (const state of states) {
+      const wrapper = mount(RefreshIndicator, { props: { state } })
+      expect(wrapper.find('[role="status"]').exists()).toBe(false)
+      wrapper.unmount()
+    }
+
+    const refreshing = mount(RefreshIndicator, { props: { state: 'refreshing', label: 'Refreshing things' } })
+    const status = refreshing.find('[role="status"]')
+    expect(status.exists()).toBe(true)
+    expect(status.attributes('aria-live')).toBe('polite')
+    expect(refreshing.text()).toContain('Refreshing things')
+    refreshing.unmount()
+  })
+
+  it('falls back to a non-empty default accessible label when none is given', () => {
+    const wrapper = mount(RefreshIndicator, { props: { state: 'refreshing' } })
+    expect(wrapper.find('[role="status"]').text().length).toBeGreaterThan(0)
+    wrapper.unmount()
+  })
+})