feat: persist sgclaw browser conversations

tools/browser_smoke/run_deepseek_browser_smoke.mjs

@@ -67,6 +67,29 @@ function assertCompatRuntimeTraffic(requests) {
   if (!instructions.includes('打开知乎搜索天气')) {
     throw new Error('fake DeepSeek server did not receive the Zhihu smoke instruction')
   }
+
+  const zhihuRequest = requests.find((entry) => {
+    return (entry.body?.messages ?? []).some((message) =>
+      message?.role === 'user' &&
+      normalizeSmokeInstruction(message.content) === '打开知乎搜索天气')
+  })
+
+  if (!zhihuRequest) {
+    throw new Error('fake DeepSeek server did not receive the Zhihu follow-up turn')
+  }
+
+  const zhihuMessages = zhihuRequest.body?.messages ?? []
+  const hasPriorUserTurn = zhihuMessages.some((message) =>
+    message?.role === 'user' &&
+    normalizeSmokeInstruction(message.content) === '打开百度搜索天气')
+  const hasPriorAssistantTurn = zhihuMessages.some((message) =>
+    message?.role === 'assistant' &&
+    typeof message.content === 'string' &&
+    message.content.includes('已在百度搜索天气'))
+
+  if (!hasPriorUserTurn || !hasPriorAssistantTurn) {
+    throw new Error('DeepSeek follow-up turn is missing prior browser conversation history')
+  }
 }
 
 main().catch((error) => {