fix(mesh): correct rpcClient.call() usage in clear-all button

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/views/Mesh.vue

@@ -232,9 +232,9 @@ async function refreshOutboxCount() {
 async function clearAllMesh() {
   if (!window.confirm('Clear all mesh peers, messages, and chat history? This cannot be undone.')) return
   try {
-    await rpcClient('mesh.clear-all')
+    await rpcClient.call({ method: 'mesh.clear-all' })
     await mesh.refreshAll()
-    selectedPeer.value = null
+    activeChatPeer.value = null
   } catch (e) {
     console.error('Failed to clear mesh:', e)
   }