feat(ui): FIPS network + seed-anchor cards render from cached resources (B4)

The two FIPS containers on the Server page were the last network cards
still fetching-on-mount into local refs — every visit was a blank card
until fips.status / fips.list-seed-anchors answered. Both now ride the
cached-resource layer: FipsNetworkCard shares the server.fips-summary
key with the Local Network card's FIPS row (one fetch, never disagree),
seed anchors cache under server.fips-seed-anchors, and mutations
write the RPC's authoritative result straight into the cache. The 15s
status poll skips hidden tabs — revalidate-on-focus covers the return.

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

neode-ui/src/views/server/FipsNetworkCard.vue

@@ -121,6 +121,7 @@
 <script setup lang="ts">
 import { computed, onMounted, onUnmounted, ref } from 'vue'
 import { rpcClient } from '@/api/rpc-client'
+import { useCachedResource } from '@/composables/useCachedResource'
 import { safeClipboardWrite } from '@/views/web5/utils'
 import FipsSeedAnchorsCard from './FipsSeedAnchorsCard.vue'
 
@@ -136,7 +137,14 @@ interface FipsStatus {
   anchor_connected?: boolean
 }
 
-const status = ref<FipsStatus>({
+// Shares `server.fips-summary` with the Local Network card's FIPS row, so
+// both paint from the same cache instantly on revisit and never disagree.
+const statusRes = useCachedResource<FipsStatus>({
+  key: 'server.fips-summary',
+  ttlMs: 15_000,
+  fetcher: (signal) => rpcClient.call<FipsStatus>({ method: 'fips.status', signal, dedup: true, maxRetries: 1 }),
+})
+const status = computed<FipsStatus>(() => statusRes.data.value ?? {
   installed: false,
   version: null,
   service_state: 'unknown',
@@ -199,18 +207,11 @@ function flash(msg: string, isError = false) {
   setTimeout(() => { statusMessage.value = '' }, 6000)
 }
 
-async function loadStatus() {
-  try {
-    status.value = await rpcClient.call<FipsStatus>({ method: 'fips.status' })
-  } catch (e) {
-    if (import.meta.env.DEV) console.warn('fips.status failed', e)
-  }
-}
-
 async function installAndActivate() {
   installing.value = true
   try {
-    status.value = await rpcClient.call<FipsStatus>({ method: 'fips.install' })
+    const next = await rpcClient.call<FipsStatus>({ method: 'fips.install' })
+    statusRes.optimistic(() => next) // confirmed server state, not a guess
     flash('FIPS started')
   } catch (e: unknown) {
     const msg = e instanceof Error ? e.message : String(e)
@@ -235,7 +236,7 @@ async function reconnectAnchor() {
     }>({ method: 'fips.reconnect', timeout: 60_000 })
     // Update the card with the post-reconnect status returned by the
     // backend — avoids an extra status fetch race.
-    status.value = { ...status.value, ...res.after }
+    statusRes.optimistic((cur) => ({ ...(cur ?? status.value), ...res.after }))
     if (res.recovered) {
       flash('Anchor reconnected.')
     } else if (res.likely_cause === 'connected') {
@@ -258,8 +259,10 @@ async function reconnectAnchor() {
 // stuck showing whatever anchor state existed at mount time forever.
 let statusInterval: ReturnType<typeof setInterval> | null = null
 onMounted(() => {
-  loadStatus()
-  statusInterval = setInterval(loadStatus, 15000)
+  statusInterval = setInterval(() => {
+    if (document.hidden) return
+    void statusRes.refresh()
+  }, 15000)
 })
 onUnmounted(() => {
   if (statusInterval) clearInterval(statusInterval)

neode-ui/src/views/server/FipsSeedAnchorsCard.vue

@@ -88,8 +88,9 @@
 </template>
 
 <script setup lang="ts">
-import { onMounted, reactive, ref } from 'vue'
+import { computed, reactive, ref } from 'vue'
 import { rpcClient } from '@/api/rpc-client'
+import { useCachedResource } from '@/composables/useCachedResource'
 
 defineProps<{ closable?: boolean }>()
 defineEmits<{ (e: 'close'): void }>()
@@ -107,7 +108,16 @@ interface ApplyResult {
   message: string
 }
 
-const anchors = ref<SeedAnchor[]>([])
+const anchorsRes = useCachedResource<SeedAnchor[]>({
+  key: 'server.fips-seed-anchors',
+  fetcher: async (signal) => {
+    const res = await rpcClient.call<{ seed_anchors: SeedAnchor[] }>({
+      method: 'fips.list-seed-anchors', signal, dedup: true, maxRetries: 1,
+    })
+    return res.seed_anchors
+  },
+})
+const anchors = computed(() => anchorsRes.data.value ?? [])
 const adding = ref(false)
 const applying = ref(false)
 const statusMessage = ref('')
@@ -126,15 +136,6 @@ function flash(msg: string, isError = false) {
   setTimeout(() => { statusMessage.value = '' }, 6000)
 }
 
-async function load() {
-  try {
-    const res = await rpcClient.call<{ seed_anchors: SeedAnchor[] }>({ method: 'fips.list-seed-anchors' })
-    anchors.value = res.seed_anchors
-  } catch (e: unknown) {
-    if (import.meta.env.DEV) console.warn('fips.list-seed-anchors failed', e)
-  }
-}
-
 async function addAnchor() {
   if (!draft.npub.trim() || !draft.address.trim()) return
   adding.value = true
@@ -148,7 +149,7 @@ async function addAnchor() {
         label: draft.label.trim(),
       },
     })
-    anchors.value = res.seed_anchors
+    anchorsRes.optimistic(() => res.seed_anchors) // authoritative post-add list
     draft.npub = ''
     draft.address = ''
     draft.label = ''
@@ -168,7 +169,7 @@ async function removeAnchor(npub: string) {
       method: 'fips.remove-seed-anchor',
       params: { npub },
     })
-    anchors.value = res.seed_anchors
+    anchorsRes.optimistic(() => res.seed_anchors)
     flash('Anchor removed.')
   } catch (e: unknown) {
     const msg = e instanceof Error ? e.message : String(e)
@@ -189,6 +190,4 @@ async function applyAll() {
     applying.value = false
   }
 }
-
-onMounted(load)
 </script>