perf(nodes): Connected Nodes refresh — parallel probes, instant list, 12s health timeout

Reachability probes ran one at a time with a 30s Tor timeout each, so
Refresh sat disabled for N-offline-peers × 30s. Now the list renders and
the button re-enables immediately; probes run concurrently and fill the
dots in as they land.

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

neode-ui/src/api/rpc-client.ts

@@ -447,7 +447,8 @@ class RPCClient {
     return this.call({
       method: 'node-check-peer',
       params: { onion },
-      timeout: 35000,
+      // Backend health-dial timeout is 12s — 15s here covers RPC overhead.
+      timeout: 15000,
     })
   }
 

neode-ui/src/views/web5/Web5ConnectedNodes.vue

@@ -379,19 +379,27 @@ async function loadPeers() {
 
     peers.value = peerList
     observers.value = observerList
-    for (const p of [...peers.value, ...observers.value]) {
-      try {
-        const check = await rpcClient.checkPeerReachable(p.onion)
-        peerReachableLocal.value[p.onion] = check.reachable
-      } catch {
-        peerReachableLocal.value[p.onion] = false
-      }
-    }
-    writeConnectedNodesCache({
-      peers: peers.value,
-      observers: observers.value,
-      peerReachable: peerReachableLocal.value,
-      connectionRequests: connectionRequests.value,
+    // The list is ready — render it and re-enable Refresh NOW. The
+    // reachability dots fill in as probes resolve. Before 2026-07-22 the
+    // probes ran ONE AT A TIME with a 30s Tor timeout each, so Refresh sat
+    // disabled for N-offline-peers × 30s ("takes ages").
+    loadingPeers.value = false
+    void Promise.allSettled(
+      [...peers.value, ...observers.value].map(async (p) => {
+        try {
+          const check = await rpcClient.checkPeerReachable(p.onion)
+          peerReachableLocal.value[p.onion] = check.reachable
+        } catch {
+          peerReachableLocal.value[p.onion] = false
+        }
+      }),
+    ).then(() => {
+      writeConnectedNodesCache({
+        peers: peers.value,
+        observers: observers.value,
+        peerReachable: peerReachableLocal.value,
+        connectionRequests: connectionRequests.value,
+      })
     })
   } catch (e) {
     if (import.meta.env.DEV) console.error('Failed to load peers:', e)