diff --git a/apps/backend/src/utils/http.ts b/apps/backend/src/utils/http.ts
index 50bece2b..d7a826b2 100644
--- a/apps/backend/src/utils/http.ts
+++ b/apps/backend/src/utils/http.ts
@@ -56,7 +56,8 @@ export function sendRouteError(
   logger(scope, fallbackMessage, {
     statusCode: classification.statusCode,
     errorCode: classification.errorCode,
-    error,
+    // 4xx 属预期失败（鉴权过期、参数错误等），带上完整错误对象只会刷十几行堆栈；仅 5xx 保留排查所需详情。
+    ...(classification.statusCode >= 500 ? { error } : {}),
   })
   res.status(classification.statusCode).json(buildErrorPayload(error, fallbackMessage))
 }
diff --git a/apps/frontend/src/hooks/useRealtimeEvents.ts b/apps/frontend/src/hooks/useRealtimeEvents.ts
index fc6f6b40..f22d5900 100644
--- a/apps/frontend/src/hooks/useRealtimeEvents.ts
+++ b/apps/frontend/src/hooks/useRealtimeEvents.ts
@@ -21,16 +21,26 @@ type UseRealtimeEventsOptions = {
   token: string
   onEvent: (event: RealtimeEvent) => void
   onConnected?: () => void
+  /** 鉴权失效（401/403）时触发：连接停止重连，调用方应清理会话并跳转登录页。 */
+  onAuthExpired?: () => void
 }
 
 const RECONNECT_DELAY_MS = 3_000
 
 /** 通过 fetch 保持带 Bearer 鉴权的 SSE 连接，避免把登录 token 暴露到 URL。 */
-export function useRealtimeEvents({ url, token, onEvent, onConnected }: UseRealtimeEventsOptions) {
+export function useRealtimeEvents({
+  url,
+  token,
+  onEvent,
+  onConnected,
+  onAuthExpired,
+}: UseRealtimeEventsOptions) {
   const onEventRef = useRef(onEvent)
   const onConnectedRef = useRef(onConnected)
+  const onAuthExpiredRef = useRef(onAuthExpired)
   onEventRef.current = onEvent
   onConnectedRef.current = onConnected
+  onAuthExpiredRef.current = onAuthExpired
 
   useEffect(() => {
     if (!token) return
@@ -50,6 +60,7 @@ export function useRealtimeEvents({ url, token, onEvent, onConnected }: UseRealt
         Authorization: `Bearer ${token}`,
       }
       if (lastEventId > 0) headers['Last-Event-ID'] = String(lastEventId)
+      let authExpired = false
       void fetch(url, {
         method: 'GET',
         headers,
@@ -57,6 +68,12 @@ export function useRealtimeEvents({ url, token, onEvent, onConnected }: UseRealt
         signal: abortController.signal,
       })
         .then(async (response) => {
+          if (response.status === 401 || response.status === 403) {
+            // 会话已失效：重连只会无限 401，交给调用方清理会话跳登录。
+            authExpired = true
+            onAuthExpiredRef.current?.()
+            return
+          }
           if (!response.ok || !response.body) {
             throw new Error(`realtime_stream_${response.status}`)
           }
@@ -73,7 +90,7 @@ export function useRealtimeEvents({ url, token, onEvent, onConnected }: UseRealt
         })
         .catch(() => undefined)
         .finally(() => {
-          if (stopped || document.visibilityState !== 'visible') return
+          if (authExpired || stopped || document.visibilityState !== 'visible') return
           reconnectTimer = window.setTimeout(connect, RECONNECT_DELAY_MS)
         })
     }
diff --git a/apps/frontend/src/layouts/AdminLayout.tsx b/apps/frontend/src/layouts/AdminLayout.tsx
index 4c42e8ba..de21197f 100644
--- a/apps/frontend/src/layouts/AdminLayout.tsx
+++ b/apps/frontend/src/layouts/AdminLayout.tsx
@@ -87,6 +87,11 @@ export default function AdminLayout() {
     url: '/api/v1/admin/realtime',
     token: getAdminToken(),
     onEvent: (event) => applyAdminRealtimeEvent(event, queryClient),
+    // 会话过期时清登录态回登录页，避免 SSE 带着失效 token 无限重连刷 401。
+    onAuthExpired: () => {
+      clearAdminSession()
+      void navigate('/admin/login', { replace: true, state: { from: location } })
+    },
   })
 
   const menuItems = useMemo<MenuProps['items']>(() => {
@@ -541,12 +546,7 @@ function isRecord(value: unknown): value is Record<string, unknown> {
 }
 
 type NotificationAlertKind =
-  | 'withdraw'
-  | 'recharge'
-  | 'acceptance'
-  | 'material'
-  | 'reminder'
-  | 'default'
+  'withdraw' | 'recharge' | 'acceptance' | 'material' | 'reminder' | 'default'
 
 function playNotificationSound(kind: NotificationAlertKind) {
   try {
diff --git a/apps/frontend/src/layouts/WorkerLayout.tsx b/apps/frontend/src/layouts/WorkerLayout.tsx
index 21bd2d30..dea8bedf 100644
--- a/apps/frontend/src/layouts/WorkerLayout.tsx
+++ b/apps/frontend/src/layouts/WorkerLayout.tsx
@@ -45,6 +45,11 @@ export default function WorkerLayout() {
     url: '/api/v1/worker/realtime',
     token: getWorkerToken(),
     onEvent: (event) => applyWorkerRealtimeEvent(event, queryClient),
+    // 会话过期时清登录态回登录页，避免 SSE 带着失效 token 无限重连刷 401。
+    onAuthExpired: () => {
+      clearWorkerSession()
+      void navigate('/', { replace: true })
+    },
   })
 
   async function submitLogout() {