fix: stabilize auth sync and stream recovery for ji

frontend-web/src/core/auth/index.ts

@@ -45,6 +45,64 @@ export function getStoredAuth(): LoginByUsernameResponse | null {
   }
 }
 
+function normalizeIdentityPart(value: unknown): string {
+  return typeof value === "string" ? value.trim().toLowerCase() : "";
+}
+
+function readUserInfoIdentity(): string | null {
+  let info: Record<string, unknown> | null = null;
+  try {
+    const raw = authStorageGet("userInfo");
+    if (raw) {
+      const parsed = JSON.parse(raw);
+      if (parsed && typeof parsed === "object" && !Array.isArray(parsed)) {
+        info = parsed as Record<string, unknown>;
+      }
+    }
+  } catch {
+    info = null;
+  }
+  if (!info) return null;
+
+  const candidates = [
+    ["yUserId", info.yUserId],
+    ["userName", info.userName],
+    ["userId", info.userId],
+  ] as const;
+
+  for (const [prefix, value] of candidates) {
+    const normalized = normalizeIdentityPart(value);
+    if (normalized) return `${prefix}:${normalized}`;
+  }
+
+  return null;
+}
+
+/**
+ * A stable cross-tab identity key for "did the account really change?" checks.
+ *
+ * Some external login paths can re-issue a backend ``user_id`` while resolving
+ * to the same business account. Prefer business-facing identifiers
+ * (email/username/userInfo) and keep ``user_id`` only as the final fallback.
+ */
+export function getAccountIdentityKey(
+  auth: LoginByUsernameResponse | null = getStoredAuth(),
+): string | null {
+  if (!auth) return null;
+
+  const email = normalizeIdentityPart(auth.email);
+  if (email) return `email:${email}`;
+
+  const username = normalizeIdentityPart(auth.username);
+  if (username) return `username:${username}`;
+
+  const userInfoIdentity = readUserInfoIdentity();
+  if (userInfoIdentity) return `userInfo:${userInfoIdentity}`;
+
+  const userId = normalizeIdentityPart(auth.user_id);
+  return userId ? `user_id:${userId}` : null;
+}
+
 export function setStoredAuth(auth: LoginByUsernameResponse) {
   if (!isBrowser()) {
     return;

frontend-web/src/core/auth/sync.tsx

@@ -3,15 +3,15 @@
 import { useEffect, useRef } from "react";
 import { toast } from "sonner";
 
-import { getStoredAuth } from "@/core/auth";
+import { getAccountIdentityKey } from "@/core/auth";
 import { isEmbedActive, isIsolatedSession } from "@/core/embed/embed-session";
 
 const AUTH_STORAGE_KEY = "deerflow.auth";
 const SETTLE_DELAY_MS = 1200;
 const IDENTITY_TOAST_ID = "auth-identity-changed";
 
-function readUserId(): string | null {
+function readIdentityKey(): string | null {
-  return getStoredAuth()?.user_id ?? null;
+  return getAccountIdentityKey();
 }
 
 /**
@@ -19,7 +19,7 @@ function readUserId(): string | null {
  * tabs and lets the user decide when to refresh on account switches.
  */
 export function AuthSyncWatcher() {
-  const lastUserIdRef = useRef<string | null>(readUserId());
+  const lastIdentityRef = useRef<string | null>(readIdentityKey());
 
   useEffect(() => {
     // 嵌入(iframe)态 / 独立会话态(?isolate=1)：鉴权走按标签页的 sessionStorage，本就不与其它标签页
@@ -29,14 +29,14 @@ export function AuthSyncWatcher() {
     let settleTimer: ReturnType<typeof setTimeout> | null = null;
 
     function evaluateSettledIdentity() {
-      const nextUserId = readUserId();
+      const nextIdentity = readIdentityKey();
-      if (nextUserId === lastUserIdRef.current) {
+      if (nextIdentity === lastIdentityRef.current) {
         return;
       }
 
-      lastUserIdRef.current = nextUserId;
+      lastIdentityRef.current = nextIdentity;
 
-      if (nextUserId === null) {
+      if (nextIdentity === null) {
         return;
       }
 

frontend-web/src/core/auth/use-live-account.ts

@@ -5,6 +5,7 @@ import { useEffect, useRef, useState } from "react";
 import {
   AUTH_STATE_CHANGED_EVENT,
   getAccountDisplayName,
+  getAccountIdentityKey,
   getStoredAuth,
 } from "@/core/auth";
 import { isEmbedActive } from "@/core/embed/embed-session";
@@ -36,11 +37,12 @@ export interface LiveAccount {
  * 账号时给出提示 —— 否则会出现「用 A 账号创建却归到 B 账号名下」。
  */
 export function useLiveAccount(): LiveAccount {
-  const mountRef = useRef<{ id: string | null; name: string } | null>(null);
+  const mountRef = useRef<{ id: string | null; key: string | null; name: string } | null>(null);
   if (mountRef.current === null) {
     const auth = getStoredAuth();
     mountRef.current = {
       id: auth?.user_id ?? null,
+      key: getAccountIdentityKey(auth),
       name: getAccountDisplayName(auth),
     };
   }
@@ -50,9 +52,10 @@ export function useLiveAccount(): LiveAccount {
     function refresh() {
       const auth = getStoredAuth();
       const id = auth?.user_id ?? null;
+      const key = getAccountIdentityKey(auth);
       const name = getAccountDisplayName(auth);
       setLive((prev) =>
-        prev.id === id && prev.name === name ? prev : { id, name },
+        prev.id === id && prev.key === key && prev.name === name ? prev : { id, key, name },
       );
     }
     // 嵌入(iframe)态鉴权走按标签页的 sessionStorage、不跨标签，收不到 storage 事件
@@ -83,6 +86,9 @@ export function useLiveAccount(): LiveAccount {
     displayName: live.name,
     mountUserId: mount.id,
     mountDisplayName: mount.name,
-    switched: live.id !== null && mount.id !== null && live.id !== mount.id,
+    switched:
+      live.key !== null && mount.key !== null
+        ? live.key !== mount.key
+        : live.id !== null && mount.id !== null && live.id !== mount.id,
   };
 }

frontend-web/src/core/threads/hooks.ts

@@ -472,13 +472,11 @@ export function useThreadStream({
   const lastStreamActivityAtRef = useRef(0);
   const streamReconciliationInFlightRef = useRef(false);
   const streamReconnectAttemptsRef = useRef(0);
-  const streamReconnectToastShownRef = useRef(false);
   const streamReconnectFailureToastShownRef = useRef(false);
 
   const markStreamActivity = useCallback(() => {
     lastStreamActivityAtRef.current = Date.now();
     streamReconnectAttemptsRef.current = 0;
-    streamReconnectToastShownRef.current = false;
     streamReconnectFailureToastShownRef.current = false;
   }, []);
 
@@ -659,8 +657,9 @@ export function useThreadStream({
         typeof event.message === "string" &&
         event.message.trim()
       ) {
-        const e = event as { type: "llm_retry"; message: string };
+        // The backend is already handling this with bounded retry/backoff.
-        toast(e.message);
+        // Surfacing every transient model retry as a toast made normal model
+        // stalls look like repeated "network fluctuation" failures.
         return;
       }
 
@@ -752,7 +751,7 @@ export function useThreadStream({
   const [optimisticMessages, setOptimisticMessages] = useState<Message[]>([]);
   const [isUploading, setIsUploading] = useState(false);
   const [threadValueOverrides, setThreadValueOverrides] = useState<
-    Partial<ThreadTitleRefreshState>
+    Partial<AgentThreadState>
   >({});
   const sendInFlightRef = useRef(false);
   // Carries the ask time of an in-flight send until the server-assigned human
@@ -824,10 +823,6 @@ export function useThreadStream({
           // enough time to receive its first event.  A genuine event resets
           // the attempt counter through ``markStreamActivity``.
           lastStreamActivityAtRef.current = Date.now();
-          if (!streamReconnectToastShownRef.current) {
-            streamReconnectToastShownRef.current = true;
-            toast.info("回答连接出现波动，正在自动恢复…");
-          }
 
           const stream = threadStreamRef.current;
           void Promise.resolve(stream.stop())
@@ -858,12 +853,14 @@ export function useThreadStream({
 
         storage?.removeItem(`lg:stream:${activeThreadId}`);
         streamReconnectAttemptsRef.current = 0;
-        streamReconnectToastShownRef.current = false;
         streamReconnectFailureToastShownRef.current = false;
         if (run.status === "success") {
+          setOptimisticMessages([]);
+          setThreadValueOverrides(finalState.values as Partial<AgentThreadState>);
           listeners.current.onFinish?.(finalState.values as AgentThreadState);
           void queryClient.invalidateQueries({ queryKey: ["threads", "search"] });
         } else {
+          setThreadValueOverrides(finalState.values as Partial<AgentThreadState>);
           toast.error("本轮生成未能完成，已同步当前对话内容，可重新发起请求。");
         }
 
@@ -960,10 +957,11 @@ export function useThreadStream({
             return;
           }
 
-          setThreadValueOverrides({
+          setThreadValueOverrides((prev) => ({
+            ...prev,
             title: nextState.title,
             title_provisional: nextState.title_provisional,
-          });
+          }));
 
           if (nextState.title) {
             updateCachedThreadLists(queryClient, (threads) =>
@@ -1329,12 +1327,17 @@ export function useThreadStream({
         }
       : thread.values;
 
+  const mergedMessages =
+    Array.isArray(mergedValues.messages)
+      ? (mergedValues.messages as Message[])
+      : thread.messages;
+
   const mergedThread =
     optimisticMessages.length > 0 || mergedValues !== thread.values
       ? ({
           ...thread,
           values: mergedValues,
-          messages: [...thread.messages, ...optimisticMessages],
+          messages: [...mergedMessages, ...optimisticMessages],
         } as typeof thread)
       : thread;
 

frontend-web/src/open-canvas/hooks/useCanvasThreadStream.ts

@@ -107,7 +107,8 @@ export function useCanvasThreadStream() {
         "message" in event &&
         typeof (event as { message: unknown }).message === "string"
       ) {
-        toast((event as { message: string }).message);
+        // Model retry events are self-healing. Keep them off the user-facing
+        // toast surface so a short model stall does not look like a failure.
       }
     },
     onError(error) {

offline-backend-20260512/backend/packages/harness/deerflow/agents/middlewares/llm_error_handling_middleware.py

@@ -36,8 +36,8 @@ LLM_ERROR_MARKER = "deerflow_llm_error"
 _USER_MESSAGES: dict[str, str] = {
     "quota": "大模型因账户额度不足、账单异常或使用受限而拒绝请求，请检查模型账户后再试。",
     "auth": "大模型因鉴权失败或无访问权限而拒绝请求,请检查模型的 API Key 与权限配置后再试。",
-    "busy": "大模型因服务繁忙或网络异常，多次重试后仍未恢复,请稍候再继续。",
+    "busy": "大模型服务暂时繁忙，多次自动重试后仍未恢复，请稍候再继续。",
-    "transient": "大模型因服务繁忙或网络异常，多次重试后仍未恢复,请稍候再继续。",
+    "transient": "大模型响应暂时中断或超时，多次自动重试后仍未恢复，请稍候再继续。",
     "upstream": "大模型当前响应异常（上游模型或网关临时故障），多次重试后仍未恢复，请稍后再试或更换模型。",
     "generic": "大模型本次调用未能成功完成，请稍后再试或更换模型。",
 }
@@ -254,8 +254,8 @@ class LLMErrorHandlingMiddleware(AgentMiddleware[AgentState]):
         elif reason == "upstream":
             reason_text = "上游响应异常"
         else:
-            reason_text = "网络/连接异常"
+            reason_text = "响应中断或超时"
-        return f"大模型因{reason_text}调用失败，正在第 {attempt}/{self.retry_max_attempts} 次重试，{seconds} 秒后继续…"
+        return f"大模型因{reason_text}暂未返回，正在第 {attempt}/{self.retry_max_attempts} 次自动重试，{seconds} 秒后继续…"
 
     def _build_circuit_breaker_message(self) -> str:
         return _CIRCUIT_MESSAGE