diff --git a/neode-ui/mock-backend.js b/neode-ui/mock-backend.js
index 0a9877b8..8be75444 100755
--- a/neode-ui/mock-backend.js
+++ b/neode-ui/mock-backend.js
@@ -895,7 +895,8 @@ app.post('/rpc/v1', (req, res) => {
 
       case 'node-messages-received':
       case 'node.messages':
-      case 'node.notifications': {
+      case 'node.notifications':
+      case 'node-list-peers': {
         return res.json({ result: [] })
       }
 
@@ -1035,6 +1036,16 @@ app.post('/aiui/api/claude/*', (req, res) => {
   const body = req.body
   if (body) {
     if (!body.max_tokens) body.max_tokens = 4096
+    // Fix model IDs — AIUI may send short names
+    if (body.model && !body.model.includes('-2')) {
+      const modelMap = {
+        'claude-haiku-4.5': 'claude-haiku-4-5-20251001',
+        'claude-haiku-4-5': 'claude-haiku-4-5-20251001',
+        'claude-sonnet-4-5': 'claude-sonnet-4-5-20250514',
+        'claude-sonnet-4.5': 'claude-sonnet-4-5-20250514',
+      }
+      if (modelMap[body.model]) body.model = modelMap[body.model]
+    }
     // Strip AIUI-specific fields that Anthropic API rejects
     delete body.webSearch
     delete body.webResults