fix: flash via lastMessagesRef, web_read timeout 8s, searcher no parallel google+web_read

langgraph/src/agent/enterprise/tools/soc-client.ts

@@ -236,7 +236,7 @@ export async function webRead(url: string): Promise<{ content: string; title: st
       Authorization: `Bearer ${config.jina.apiKey}`,
       Accept: "application/json",
     },
-    signal: AbortSignal.timeout(getToolConfig("web_search").timeoutMs),
+    signal: AbortSignal.timeout(getToolConfig("web_read").timeoutMs),
   });
   if (!resp.ok) throw new Error(`Jina read failed: ${resp.status}`);
   const data = await resp.json();

langgraph/src/agent/searcher/nodes/agent.ts

@@ -11,10 +11,11 @@ const SYSTEM_PROMPT = `你是深度搜索助手。通过多步搜索为用户找
 
 ## 搜索策略
 1. 分析问题关键词和意图，确定搜索方向
-2. google_search 快速获取概览，web_search_deep 获取完整内容——根据问题深度选择
-3. 需要详细内容时，用 web_read 读取页面全文
-4. 首次结果不理想则调整关键词或换用另一种搜索工具重试
+2. 第一步：先调用 google_search 获取概览，**等待搜索结果返回后**再决定下一步
+3. 如需更深内容，**在单独的一步**调用 web_read 读取特定页面——不要在同一次调用中同时发起 google_search 和 web_read
+4. 首次结果不理想则调整关键词或换用 web_search_deep 重试
 5. 复杂问题拆分为子问题分别搜索，最后综合
+6. **严禁**：在同一轮 tool_calls 中同时调用 google_search 和 web_read
 
 ## 引用格式
 - 回答中用 [1][2] 标注来源

langgraph/src/agent/utils/toolConfig.ts

@@ -10,7 +10,8 @@ export const TOOL_CONFIGS: Record<string, ToolConfig> = {
   ticket_list:     { timeoutMs: 15_000, maxRetries: 2, backoffMs: 500 },
   ticket_detail:   { timeoutMs: 15_000, maxRetries: 2, backoffMs: 500 },
   google_search:   { timeoutMs: 10_000, maxRetries: 1 },
-  web_search:      { timeoutMs: 30_000, maxRetries: 1 },
+  web_search:      { timeoutMs: 10_000, maxRetries: 1 },
+  web_read:        { timeoutMs: 8_000,  maxRetries: 1 },
   web_search_deep: { timeoutMs: 45_000, maxRetries: 1 },
   sandbox_run:     { timeoutMs: 15_000, maxRetries: 1 },
   code_execute:    { timeoutMs: 15_000, maxRetries: 1 },

langgraph/src/main.tsx

@@ -546,8 +546,19 @@ function App() {
     reader.readAsDataURL(file);
   }
 
-  // ── Active messages: prefer streaming messages, fall back to historical ──
-  const activeMessages: Message[] = thread.messages.length > 0 ? thread.messages : historicalMessages;
+  // ── Active messages: prefer streaming messages, fall back to cached/historical ──
+  // Use a ref to cache the last known non-empty messages, preventing flash when
+  // thread.messages briefly becomes [] during a new submission.
+  const lastMessagesRef = useRef<Message[]>([]);
+  if (thread.messages.length > 0) {
+    lastMessagesRef.current = thread.messages;
+  }
+  const activeMessages: Message[] =
+    thread.messages.length > 0
+      ? thread.messages
+      : lastMessagesRef.current.length > 0
+        ? lastMessagesRef.current
+        : historicalMessages;
 
   // ── Collect completed tool call IDs ─────────────────────────────────────
   const completedToolIds = new Set(