feat: complete chat routing and openai onboarding

src/components/ai-accounts-client.tsx

@@ -314,12 +314,13 @@ export function AiAccountsClient({
         nodeId: draft.nodeId.trim(),
         nodeLabel: draft.nodeLabel.trim(),
         model: draft.model.trim() || "gpt-5.4",
+        setActive: true,
       }),
     });
     const result = (await response.json()) as { ok: boolean; message?: string };
     setBusyKey(null);
     if (result.ok) {
-      setMessage(result.message || "Master Codex Node 已绑定。");
+      setMessage(result.message || "Master Codex Node 已绑定，并设为当前主控。");
       setMasterNodeOnboardDraft(defaultMasterNodeOnboardDraft());
       closeOnboarding();
       router.refresh();