diff --git a/src/api/nvrVideo.js b/src/api/nvrVideo.js
index 1072b13..64b9bce 100644
--- a/src/api/nvrVideo.js
+++ b/src/api/nvrVideo.js
@@ -1,4 +1,5 @@
 import request from '@/utils/request'
+import { limitVideoRequest } from '@/utils/videoRequestLimit'
 import axios from 'axios'
 
 const ivsRequest = axios.create({
@@ -29,30 +30,33 @@ export function getNvrConfig() {
 }
 
 export function startLive(channel, streamType = 1) {
-  return unwrap(request({
+  return unwrap(limitVideoRequest(() => request({
     url: '/patrol/video/realtime/start',
     method: 'post',
+    timeout: 8000,
     data: {
       cameraCode: channel.cameraCode || channel.channelCode,
       streamType
     }
-  }))
+  })))
 }
 
 export function getLiveStatus(cameraCode) {
-  return unwrap(request({
+  return unwrap(limitVideoRequest(() => request({
     url: '/patrol/video/realtime/status',
     method: 'get',
+    timeout: 8000,
     params: { cameraCode }
-  }))
+  })))
 }
 
 export function stopLive(cameraCode) {
-  return unwrap(request({
+  return unwrap(limitVideoRequest(() => request({
     url: '/patrol/video/realtime/stop',
     method: 'post',
+    timeout: 8000,
     data: { cameraCode }
-  }))
+  })))
 }
 
 export function controlPtz(payload) {
diff --git a/src/api/portal/index.js b/src/api/portal/index.js
index 60c12f1..ee5dd42 100644
--- a/src/api/portal/index.js
+++ b/src/api/portal/index.js
@@ -2,78 +2,95 @@
 // 这些接口由中心端后端提供，返回"所有站"的汇总数据；
 // 与单站业务接口不同，它们不依赖当前登录用户所属站。
 // 后端未就绪时页面以空态展示，不影响其它功能。
+import axios from "axios";
 import request from "@/utils/request";
+import { limitVideoRequest } from "@/utils/videoRequestLimit";
 
 // 场站列表
 // 返回 data: [{ id, stationCode, stationName, baseUrl, portalUrl, enabled }]
-export function getStationList(query) {
+export function getStationList(query, config = {}) {
   return request({
     url: "/agg/station/all",
     method: "get",
     params: query,
-    noAlert: true
+    noAlert: true,
+    cancelToken: config.cancelToken
   });
 }
 
 // 本轮巡检任务统计（表计/外观/红外）
 // 返回 data: [{ algCategory, inspectedTaskCount, completedTaskCount, defectCount, ... }]
-export function getInspectionOverview(query) {
+export function getInspectionOverview(query, config = {}) {
   return request({
     url: "/agg/statistic/inspection",
     method: "get",
     params: query,
-    noAlert: true
+    noAlert: true,
+    cancelToken: config.cancelToken
   });
 }
 
 // 缺陷发现趋势（最近 12 个月或 4 个季度）
 // 返回 data: [{ date, minorCount, generalCount, seriousCount, urgentCount, ... }]
-export function getDefectTrend(query) {
+export function getDefectTrend(query, config = {}) {
   return request({
     url: "/agg/statistic/defect",
     method: "get",
     params: query,
-    noAlert: true
+    noAlert: true,
+    cancelToken: config.cancelToken
   });
 }
 
 // 通道设备来源统计
 // 返回 data: { totalCount, deviceSourceCounts: [{ deviceSource, count }] }
-export function getChannelStats(query) {
+export function getChannelStats(query, config = {}) {
   return request({
     url: "/agg/statistic/channel",
     method: "get",
     params: query,
-    noAlert: true
+    noAlert: true,
+    cancelToken: config.cancelToken
   });
 }
 
 // 通道树
 // 返回 data: 区域、巡检设备、通道三级树
-export function getChannelTree(query) {
+export function getChannelTree(query, config = {}) {
   return request({
     url: "/agg/tree/channel",
     method: "get",
     params: query,
-    noAlert: true
+    noAlert: true,
+    skipWorkspaceStation: !!config.skipWorkspaceStation,
+    cancelToken: config.cancelToken
   });
 }
 
 // 汇聚侧实时视频启动
 // 返回 data: { stationCode, cameraCode, streamId, hls, flv, status }
+// 拉流会占住浏览器到同一地址的连接，必须可取消，否则切页后连接一直 pending。
 export function startRealtimeVideo(query) {
   const { stationCode, ...data } = query || {};
-  return request({
-    url: "/agg/video/realtime/start",
-    method: "post",
-    params: { stationCode },
-    data,
-    noAlert: true
+  const source = axios.CancelToken.source();
+  const promise = limitVideoRequest(registerAbort => {
+    registerAbort(() => source.cancel("video request cancelled"));
+    return request({
+      url: "/agg/video/realtime/start",
+      method: "post",
+      params: { stationCode },
+      data,
+      timeout: 8000,
+      noAlert: true,
+      cancelToken: source.token
+    });
   });
+  return promise;
 }
 
 // 汇聚侧实时视频停止
-// 入参按后端要求传 stationCode + cameraCode
+// 入参按后端要求传 stationCode + cameraCode。
+// 停流不进拉流队列：离开首页时拉流可能还占着名额，停流再排队就会和业务请求一起卡住。
 export function stopRealtimeVideo(query) {
   const { stationCode, ...data } = query || {};
   return request({
@@ -81,6 +98,7 @@ export function stopRealtimeVideo(query) {
     method: "post",
     params: { stationCode },
     data,
+    timeout: 8000,
     noAlert: true
   });
 }
diff --git a/src/api/videosMonitor/index.js b/src/api/videosMonitor/index.js
index e0b1cd0..37caf67 100644
--- a/src/api/videosMonitor/index.js
+++ b/src/api/videosMonitor/index.js
@@ -28,11 +28,12 @@ export function getAreaEqubookTreeSelect(params) {
  * @param {*} data
  * @returns
  */
-export function list(params) {
+export function list(params, config = {}) {
   return request({
     url: "/patrol/taskstatus/list",
     method: "get",
     params,
+    cancelToken: config.cancelToken,
   });
 }
 /**
diff --git a/src/layout/index.vue b/src/layout/index.vue
index 50cbb7e..d2758ae 100644
--- a/src/layout/index.vue
+++ b/src/layout/index.vue
@@ -57,6 +57,7 @@ import { AppMain, Navbar, Settings, Sidebar, TagsView } from './components'
 import ResizeMixin from './mixin/ResizeHandler'
 import { mapState, mapGetters } from 'vuex'
 import variables from '@/assets/styles/variables.scss'
+import axios from 'axios'
 import { getStationList } from '@/api/portal'
 
 export default {
@@ -74,7 +75,8 @@ export default {
       // 侧边栏宽度档位：0=160px，1=200px，2=240px，3=280px，随子菜单展开层级加深
       sidebarWidthLevel: 0,
       // 汇聚态站名筛选选项
-      stationOptions: []
+      stationOptions: [],
+      stationRequestSource: null
     }
   },
   mixins: [ResizeMixin],
@@ -137,12 +139,25 @@ export default {
   mounted() {
     if (this.fromPortal) this.loadStationOptions()
   },
+  beforeDestroy() {
+    this.cancelStationOptions()
+  },
   methods: {
+    cancelStationOptions() {
+      if (!this.stationRequestSource) return
+      this.stationRequestSource.cancel('layout station list cancelled')
+      this.stationRequestSource = null
+    },
     // 站名下拉选项：与汇聚首页同款接口
     loadStationOptions() {
-      getStationList({}).then(response => {
+      this.cancelStationOptions()
+      this.stationRequestSource = axios.CancelToken.source()
+      getStationList({}, { cancelToken: this.stationRequestSource.token }).then(response => {
+        this.stationRequestSource = null
         this.stationOptions = Array.isArray(response && response.data) ? response.data : []
-      }).catch(() => {
+      }).catch((error) => {
+        if (axios.isCancel(error)) return
+        this.stationRequestSource = null
         this.stationOptions = []
       })
     },
diff --git a/src/permission.js b/src/permission.js
index 7a30355..058d770 100644
--- a/src/permission.js
+++ b/src/permission.js
@@ -21,7 +21,9 @@ router.beforeEach(async (to, from, next) => {
     /* has token*/
     if (to.path === "/login") {
       console.info("[GAB] to next");
-      next({ path: homePath, replace: true });
+      // 已经登录时回到进来前的地址；没有记录才去打包配置的首页
+      const redirect = to.query && to.query.redirect
+      next({ path: redirect || homePath, replace: true });
       // NProgress.done();
     } else if (to.path === "/video-preview-embed") {
       next();
@@ -70,7 +72,7 @@ router.beforeEach(async (to, from, next) => {
       // 在免登录白名单，直接进入
       next();
     } else {
-      next(`/login`); // 否则全部重定向到登录页
+      next({ path: "/login", query: { redirect: to.fullPath } }); // 记住进来的地址，登录后回到这一页
       // NProgress.done();
     }
   }
diff --git a/src/store/getters.js b/src/store/getters.js
index 1e045ea..33d246d 100644
--- a/src/store/getters.js
+++ b/src/store/getters.js
@@ -20,6 +20,8 @@ const getters = {
   siteId: state => state.siteContext.siteId,
   siteName: state => state.siteContext.siteName,
   inSite: state => state.siteContext.siteId !== undefined && state.siteContext.siteId !== null,
+  // 从汇聚门户点进动环巡检后保留的会话标记：横向导航、聚合接口都靠它。
+  // 直接打开 /index 不会带这个标记，所以仍是站端。
   fromPortal: state => state.siteContext.fromPortal,
   workspaceStationCode: state => state.siteContext.workspaceStationCode,
 }
diff --git a/src/utils/image-url.js b/src/utils/image-url.js
index ab50a0b..6e319e4 100644
--- a/src/utils/image-url.js
+++ b/src/utils/image-url.js
@@ -1,3 +1,5 @@
+import store from "@/store";
+
 const imagePathPrefix = process.env.VUE_APP_IMAGE_PATH_PREFIX || "";
 
 function joinPath(left, right) {
@@ -33,6 +35,12 @@ export function buildImageUrl(ftpViewAddress, imagePath) {
     return path;
   }
 
+  // 汇聚接口直接返回各站完整图片地址，由 nginx 代理，前端不再拼前缀。
+  // 站端仍走下面的前缀拼接。
+  if (store.getters.fromPortal && !store.getters.inSite) {
+    return path;
+  }
+
   if (/^https?:\/\//i.test(path)) {
     try {
       const absoluteUrl = new URL(path);
diff --git a/src/utils/request.js b/src/utils/request.js
index 12366f9..3fb0dab 100644
--- a/src/utils/request.js
+++ b/src/utils/request.js
@@ -68,7 +68,8 @@ service.interceptors.request.use(config => {
     if (mapped) config.url = "/" + mapped
     // 工作台顶部站名下拉：选中站后给列表/树查询带上 stationCode（"全部场站"不传）
     const wsCode = store.getters.workspaceStationCode
-    if (wsCode && config.method === "get" && AGG_STATION_CODE_PATHS.some(p => config.url.indexOf(p) === 0)) {
+    // 首页设备树自己带场站，不能被动环巡检右上角的选择覆盖
+    if (wsCode && !config.skipWorkspaceStation && config.method === "get" && AGG_STATION_CODE_PATHS.some(p => config.url.indexOf(p) === 0)) {
       config.params = Object.assign({}, config.params, { stationCode: wsCode })
     }
   }
@@ -179,7 +180,8 @@ service.interceptors.response.use((res) => {
       // 本系统登录的用户：会话过期后回到登录页，不能悄悄换成别的账号
       store.dispatch("FedLogOut").then(() => {
         Message.error("登录状态已过期，请重新登录");
-        router.push({ path: "/login" }).catch(() => { });
+        const returnPath = router.currentRoute && router.currentRoute.fullPath
+        router.push({ path: "/login", query: returnPath && returnPath !== "/login" ? { redirect: returnPath } : undefined }).catch(() => { });
       });
     }
     return Promise.reject(new Error('无效的会话，或者会话已过期，请重新登录。'))
@@ -208,8 +210,15 @@ service.interceptors.response.use((res) => {
   }
 },
   error => {
+    // 页面切走时主动取消的请求不是失败，不能弹错误，也不能当成异常去重试。
+    if (axios.isCancel(error)) {
+      return Promise.reject(error)
+    }
     console.log('[GAB] err: ' + error)
     let { message } = error;
+    if (!message) {
+      return Promise.reject(error)
+    }
     if (message == "Network Error") {
       message = "后端接口连接异常";
     }
diff --git a/src/utils/videoRequestLimit.js b/src/utils/videoRequestLimit.js
new file mode 100644
index 0000000..0a2c6ae
--- /dev/null
+++ b/src/utils/videoRequestLimit.js
@@ -0,0 +1,60 @@
+// 浏览器对同一地址的并发连接有上限（HTTP/1.1 通常是 6）。
+// 首页四路拉流一旦卡住就会占满连接，巡检列表等业务请求只能一直 pending，页面跟着卡死。
+// 拉流单独排队，同时最多两路；离开页面时把还没发出的请求丢掉，并取消已经发出的请求。
+const MAX_CONCURRENT = 2
+let running = 0
+const queue = []
+
+function pump() {
+  while (running < MAX_CONCURRENT && queue.length) {
+    const job = queue.shift()
+    if (job.cancelled) continue
+    running += 1
+    let settled = false
+    const finish = () => {
+      if (settled) return
+      settled = true
+      running -= 1
+      pump()
+    }
+    Promise.resolve()
+      .then(() => job.task(signal => {
+        job.abort = signal
+      }))
+      .then(
+        value => {
+          finish()
+          if (!job.cancelled) job.resolve(value)
+        },
+        error => {
+          finish()
+          if (!job.cancelled) job.reject(error)
+        }
+      )
+  }
+}
+
+function cancelledError() {
+  const error = new Error("video request cancelled")
+  error.code = "ERR_CANCELED"
+  return error
+}
+
+export function limitVideoRequest(task) {
+  let job
+  const promise = new Promise((resolve, reject) => {
+    job = { task, resolve, reject, cancelled: false, abort: null }
+    queue.push(job)
+    pump()
+  })
+  // 还在排队就直接丢掉；已经发出去的交给调用方注册的 abort 取消。
+  promise.cancel = () => {
+    if (!job || job.cancelled) return
+    job.cancelled = true
+    const index = queue.indexOf(job)
+    if (index !== -1) queue.splice(index, 1)
+    if (typeof job.abort === "function") job.abort()
+    job.reject(cancelledError())
+  }
+  return promise
+}
diff --git a/src/views/cards/components/ImagePreviewZoomTemperature/index.vue b/src/views/cards/components/ImagePreviewZoomTemperature/index.vue
index ca59b50..d40c552 100644
--- a/src/views/cards/components/ImagePreviewZoomTemperature/index.vue
+++ b/src/views/cards/components/ImagePreviewZoomTemperature/index.vue
@@ -31,7 +31,7 @@
           -->
             <img
               ref="previewImage"
-              :src="'/app/htjc6/htjcImage/'+selectImgUrl"
+              :src="previewImageSrc"
               style="width: 100%; height: 100%; object-fit: contain"
               @load="handleImageLoad"
               @error="handleImageError"
@@ -97,6 +97,7 @@
 </template>
 
 <script>
+import { mapGetters } from "vuex";
 import { getTemperatureValue } from "@/api/device";
 import { downloadCsv } from "@/api/basedata/patrolpointmnt/patrolpointpreset.js";
 import Papa from "papaparse";
@@ -178,6 +179,14 @@ export default {
     };
   },
   computed: {
+    ...mapGetters(["fromPortal", "inSite"]),
+    previewImageSrc() {
+      if (!this.selectImgUrl) return "";
+      if (/^(https?:|data:|blob:)/i.test(this.selectImgUrl)) return this.selectImgUrl;
+      // 汇聚直接使用后端返回的完整地址；站端继续拼图片前缀
+      if (this.fromPortal && !this.inSite) return this.selectImgUrl;
+      return "/app/htjc6/htjcImage/" + this.selectImgUrl;
+    },
     selectImgUrl() {
       return this.dataImageUrls.length > this.selectIndex
         ? this.dataImageUrls[this.selectIndex]
diff --git a/src/views/cards/site_management/site_management.vue b/src/views/cards/site_management/site_management.vue
index 59ddabe..1a451da 100644
--- a/src/views/cards/site_management/site_management.vue
+++ b/src/views/cards/site_management/site_management.vue
@@ -139,8 +139,9 @@
                 </el-option>
               </el-select>
 
-              <!-- 设备类型筛选下拉框 -->
+              <!-- 设备类型筛选下拉框：汇聚下不使用 -->
               <el-select
+                v-if="!$store.getters.fromPortal"
                 v-model="selectedDeviceType"
                 placeholder="全部设备类型"
                 clearable
@@ -1680,7 +1681,7 @@ export default {
   created() {
     this.testobjBackup = lodash.cloneDeep(this.testobj);
     this.presetDataBackup = lodash.cloneDeep(this.presetData);
-    listPatroltype().then((res) => {
+    if (!this.$store.getters.fromPortal) listPatroltype().then((res) => {
       const list = [];
       let childs = [];
       let ptype = {};
@@ -1714,14 +1715,16 @@ export default {
     this.getAreaList1();
     this.getAlgCategory();
 
-    getBdconfigMainsystem().then((res) => {
-      const config = res.data.find((x) => x.systemType.includes("xsxt"));
-      if (config) {
-        this.updata = {
-          sendCode: config.mainSystemCode,
-        };
-      }
-    });
+    if (!this.$store.getters.fromPortal) {
+      getBdconfigMainsystem().then((res) => {
+        const config = res.data.find((x) => x.systemType.includes("xsxt"));
+        if (config) {
+          this.updata = {
+            sendCode: config.mainSystemCode,
+          };
+        }
+      });
+    }
 
     // 从localStorage加载保存的宽度
     this.loadLeftPanelWidth();
diff --git a/src/views/cards/taskSummary/inspectionTask.vue b/src/views/cards/taskSummary/inspectionTask.vue
index d86bbe4..a79f8d9 100644
--- a/src/views/cards/taskSummary/inspectionTask.vue
+++ b/src/views/cards/taskSummary/inspectionTask.vue
@@ -490,6 +490,7 @@ import InspectionTaskDefectDetail from "./inspectionTaskDefectDetail.vue";
 import PatrolAbnormalStatistics from "@/views/cards/error_statistics/patrolAbnormalStatistics.vue";
 import debounce from "lodash.debounce";
 import moment from "moment";
+import axios from "axios";
 import { openDialog } from "../common.js";
 import { list, areaList, taskStatusChange } from "@/api/videosMonitor/index";
 import { listData } from "@/api/system/dict/data";
@@ -516,6 +517,7 @@ export default {
   data() {
     return {
       timer: null, // 用于存储定时器的引用
+      listCancelSource: null,
       // 遮罩层
       loading: false,
       // 总条数
@@ -625,10 +627,12 @@ export default {
   },
   computed: {},
   beforeDestroy() {
-    // 在组件销毁前清除定时器
+    // 在组件销毁前清除定时器，并中止还没返回的列表请求。
+    // 巡检列表和首页拉流打的是同一地址，不取消就会一直占着浏览器连接。
     if (this.timer) {
       clearInterval(this.timer);
     }
+    this.cancelListRequest();
   },
   created() {
     // 防抖
@@ -711,6 +715,7 @@ export default {
       clearInterval(this.timer);
       this.timer = null;
     }
+    this.cancelListRequest();
   },
   destroyed() {
     this.setTableHeight.cancel();
@@ -747,6 +752,11 @@ export default {
         this.$refs.tableCardRef.clientHeight - 52
       );
     },
+    cancelListRequest() {
+      if (!this.listCancelSource) return;
+      this.listCancelSource.cancel("inspection list cancelled");
+      this.listCancelSource = null;
+    },
     getList(showLoading = false) {
       // 保存当前选中的任务ID
       const selectedIds = this.pendingSelectedIds.length
@@ -761,8 +771,13 @@ export default {
       if (showLoading) {
         this.loading = true;
       }
-      list(params)
+      // 轮询和手动刷新会叠在上一次还没回来的请求上，先取消旧的。
+      this.cancelListRequest();
+      const source = axios.CancelToken.source();
+      this.listCancelSource = source;
+      list(params, { cancelToken: source.token })
         .then(({ rows, total }) => {
+          if (this.listCancelSource === source) this.listCancelSource = null;
           this.loading = false;
           this.dataList = rows;
           this.total = total;
@@ -780,7 +795,9 @@ export default {
             this.pendingSelectedIds = [];
           });
         })
-        .catch(() => {
+        .catch((error) => {
+          if (axios.isCancel(error)) return;
+          if (this.listCancelSource === source) this.listCancelSource = null;
           this.loading = false;
         });
     },
diff --git a/src/views/portal/components/PortalDeviceTree.vue b/src/views/portal/components/PortalDeviceTree.vue
index 2761208..b8dc327 100644
--- a/src/views/portal/components/PortalDeviceTree.vue
+++ b/src/views/portal/components/PortalDeviceTree.vue
@@ -79,7 +79,9 @@ function filterTree(nodes, keyword, onlineStatus) {
 export default {
   name: "PortalDeviceTree",
   props: {
-    selectedCode: { type: String, default: "" }
+    selectedCode: { type: String, default: "" },
+    // 只跟首页场站选择，不吃动环巡检右上角的站
+    stationCode: { type: String, default: "" }
   },
   data() {
     return {
@@ -89,6 +91,7 @@ export default {
       keywords: "",
       onlineStatus: "1",
       internalLoading: false,
+      treeRequestId: 0,
       treeProps: { children: "children", label: "label" }
     };
   },
@@ -99,6 +102,9 @@ export default {
   },
   watch: {
     onlineStatus: "refreshTree",
+    stationCode() {
+      this.loadTree();
+    },
     selectedCode(value) {
       const node = this.channelNodes.find(item => this.toCameraCode(item) === value);
       if (node && this.$refs.treeRef) this.$refs.treeRef.setCurrentKey(node.id);
@@ -109,12 +115,19 @@ export default {
   },
   methods: {
     async loadTree() {
+      const requestId = ++this.treeRequestId;
       this.internalLoading = true;
+      this.treeNodes = [];
+      this.treeData = [];
+      this.expandedKeys = [];
       try {
-        const response = await getChannelTree({ onlineStatus: this.onlineStatus, patroldeviceTypeFlag: "ipc" });
-        this.treeNodes = Array.isArray(response && response.data) ? response.data : [];
-        this.expandedKeys = [];
-        const walk = nodes => (nodes || []).forEach(node => {
+        const query = { onlineStatus: this.onlineStatus, patroldeviceTypeFlag: "ipc" };
+        if (this.stationCode) query.stationCode = this.stationCode;
+        const response = await getChannelTree(query, { skipWorkspaceStation: true });
+        if (requestId !== this.treeRequestId) return;
+        const nodes = Array.isArray(response && response.data) ? response.data : [];
+        this.treeNodes = this.stationCode ? this.keepStation(nodes, this.stationCode) : nodes;
+        const walk = items => (items || []).forEach(node => {
           if (node.children && node.children.length) {
             this.expandedKeys.push(node.id);
             walk(node.children);
@@ -124,13 +137,31 @@ export default {
         this.refreshTree();
         this.$emit("channels-loaded", this.channelNodes.map(this.normalizeChannel));
       } catch (error) {
+        if (requestId !== this.treeRequestId) return;
         this.treeNodes = [];
         this.treeData = [];
         this.$message.error(error.message || "设备树加载失败");
       } finally {
-        this.internalLoading = false;
+        if (requestId === this.treeRequestId) this.internalLoading = false;
       }
     },
+    keepStation(nodes, stationCode) {
+      const matched = this.filterStation(nodes, stationCode);
+      return matched.length ? matched : nodes;
+    },
+    filterStation(nodes, stationCode) {
+      return (nodes || []).reduce((result, node) => {
+        if (node.channelFlag) {
+          if (String(node.stationCode || "") === String(stationCode)) result.push(node);
+          return result;
+        }
+        const children = this.filterStation(node.children, stationCode);
+        if (String(node.stationCode || "") === String(stationCode) || children.length) {
+          result.push({ ...node, children });
+        }
+        return result;
+      }, []);
+    },
     refreshTree() {
       this.treeData = filterTree(this.treeNodes, this.keywords, this.onlineStatus);
     },
diff --git a/src/views/portal/index.vue b/src/views/portal/index.vue
index a0e4a51..df187cc 100644
--- a/src/views/portal/index.vue
+++ b/src/views/portal/index.vue
@@ -237,7 +237,9 @@
 
             <aside v-if="treeMounted" v-show="treeVisible" class="portal-device-tree">
               <portal-device-tree
+                :key="portalTreeStationCode || 'all'"
                 :selected-code="selectedPortalCameraCode"
+                :station-code="portalTreeStationCode"
                 @channels-loaded="handlePortalTreeChannels"
                 @open="openPortalChannel"
               />
@@ -272,6 +274,7 @@ import {
 } from "@/api/portal";
 import Hls from "hls.js";
 import flvjs from "flv.js";
+import axios from "axios";
 import DefectTrendChart from "./components/DefectTrendChart";
 import PortalDeviceTree from "./components/PortalDeviceTree.vue";
 import Navbar from "@/layout/components/Navbar";
@@ -406,6 +409,10 @@ export default {
       treeMounted: false,
       portalPlayers: {},
       portalStartTimers: {},
+      portalStartRequests: {},
+      portalRequestSource: null,
+      portalAlive: true,
+      portalReleased: false,
       overviewRequestSerial: 0,
       trendRequestSerial: 0
     };
@@ -446,6 +453,10 @@ export default {
         .filter(video => String(video.stationId) === String(this.videoStationId))
         .slice(0, 4);
     },
+    portalTreeStationCode() {
+      const station = this.stationList.find(item => String(item.id) === String(this.videoStationId));
+      return station && station.code ? station.code : "";
+    },
     portalVideoSlots() {
       return Array.from({ length: 4 }, (_, index) => this.videoList[index] || null);
     },
@@ -472,8 +483,7 @@ export default {
     this.loadPortalData();
   },
   beforeDestroy() {
-    this.pauseDefectCarousel();
-    this.stopPortalVideos();
+    this.releasePortalPage();
   },
   methods: {
     selectMonitorStation(station) {
@@ -491,6 +501,18 @@ export default {
       this.trendStationId = station.code;
       this.trendType = algCategory;
     },
+    portalRequestConfig() {
+      if (!this.portalRequestSource) this.portalRequestSource = axios.CancelToken.source();
+      return { cancelToken: this.portalRequestSource.token };
+    },
+    cancelPortalRequests() {
+      if (!this.portalRequestSource) return;
+      this.portalRequestSource.cancel("portal requests cancelled");
+      this.portalRequestSource = null;
+    },
+    isPortalCancel(error) {
+      return !this.portalAlive || axios.isCancel(error);
+    },
     loadPortalData() {
       return this.loadStations().then(() => Promise.all([
         this.loadInspectionOverview(),
@@ -500,7 +522,7 @@ export default {
       ]));
     },
     loadStations() {
-      return getStationList({}).then(response => {
+      return getStationList({}, this.portalRequestConfig()).then(response => {
         const rows = Array.isArray(response && response.data) ? response.data : [];
         this.stationList = rows.map(item => ({
           id: item.id,
@@ -511,7 +533,8 @@ export default {
           enabled: String(item.enabled),
           status: String(item.enabled) === "1" ? "normal" : "abnormal"
         }));
-      }).catch(() => {
+      }).catch((error) => {
+        if (this.isPortalCancel(error)) return;
         this.stationList = [];
       });
     },
@@ -519,7 +542,7 @@ export default {
       const params = {};
       const station = this.stationList.find(item => String(item.id) === String(this.videoStationId));
       if (station && station.code) params.stationCode = station.code;
-      return getChannelStats(params).then(response => {
+      return getChannelStats(params, this.portalRequestConfig()).then(response => {
         const data = response && response.data ? response.data : {};
         const counts = Array.isArray(data.deviceSourceCounts) ? data.deviceSourceCounts : [];
         const cameraCount = { ...EMPTY_CAMERA, total: toCount(data.totalCount) };
@@ -532,19 +555,21 @@ export default {
           else cameraCount.security += count;
         });
         this.cameraCount = cameraCount;
-      }).catch(() => {
+      }).catch((error) => {
+        if (this.isPortalCancel(error)) return;
         this.cameraCount = { ...EMPTY_CAMERA };
       });
     },
     loadVideoChannels() {
-      return getChannelTree({ onlineStatus: "1", patroldeviceTypeFlag: "ipc" }).then(response => {
+      return getChannelTree({ onlineStatus: "1", patroldeviceTypeFlag: "ipc" }, { skipWorkspaceStation: true, ...this.portalRequestConfig() }).then(response => {
         const nodes = flattenNodes(Array.isArray(response && response.data) ? response.data : []);
         const videos = nodes
           .filter(node => node.channelFlag && (String(node.patroldeviceOnlineStatus || "1") === "1"))
           .map(this.normalizePortalVideo);
         this.portalChannels = videos;
         return this.replacePortalVideos(videos);
-      }).catch(() => {
+      }).catch((error) => {
+        if (this.isPortalCancel(error)) return;
         this.portalChannels = [];
         return this.replacePortalVideos([]);
       });
@@ -563,6 +588,8 @@ export default {
     },
     replacePortalVideos(videos) {
       return this.stopPortalVideos().then(() => {
+        // 切页后停流才返回时，不能再把播放器挂回去。
+        if (!this.portalAlive) return;
         this.videoList = (videos || []).slice(0, 4);
         this.activeVideoIndex = 0;
         this.$nextTick(() => this.startDefaultPortalVideos());
@@ -574,19 +601,25 @@ export default {
       });
     },
     async startPortalVideo(video, index) {
-      if (!video || !video.stationCode || !video.cameraCode) return;
+      if (!this.portalAlive || !video || !video.stationCode || !video.cameraCode) return;
       this.clearPortalStartTimer(index);
+      this.cancelPortalStart(index);
       this.destroyPortalPlayer(index);
       this.$set(video, "loading", true);
       this.$set(video, "playbackError", false);
       this.$set(video, "playUrl", "");
       this.$set(video, "flvUrl", "");
+      const request = startRealtimeVideo({
+        stationCode: video.stationCode,
+        cameraCode: video.cameraCode
+      });
+      this.$set(this.portalStartRequests, index, request);
       try {
-        const response = await startRealtimeVideo({
-          stationCode: video.stationCode,
-          cameraCode: video.cameraCode
-        });
-        if (this.videoList[index] !== video) return;
+        const response = await request;
+        if (this.portalStartRequests[index] === request) {
+          this.$delete(this.portalStartRequests, index);
+        }
+        if (!this.portalAlive || this.videoList[index] !== video) return;
         const stream = pickPortalStream(response);
         this.$set(video, "streamId", stream.streamId);
         this.$set(video, "playUrl", stream.hlsUrl);
@@ -598,6 +631,11 @@ export default {
         }
         this.$nextTick(() => this.attachPortalPlayer(video, index));
       } catch (error) {
+        if (this.portalStartRequests[index] === request) {
+          this.$delete(this.portalStartRequests, index);
+        }
+        // 切页取消的请求不要再改状态，组件可能已经销毁。
+        if (!this.portalAlive || (error && error.code === "ERR_CANCELED")) return;
         this.$set(video, "loading", false);
         this.$set(video, "playbackError", true);
       }
@@ -605,10 +643,14 @@ export default {
     attachPortalPlayer(video, index) {
       const ref = this.$refs[`portalVideo${index}`];
       const element = Array.isArray(ref) ? ref[0] : ref;
-      if (!video || this.videoList[index] !== video) return;
+      if (!this.portalAlive || !video || this.videoList[index] !== video) return;
       if (!element) {
+        // 切走时视频节点会被拆掉。这里再排一次 nextTick，离开后会一直空转。
         this.$nextTick(() => {
-          if (this.videoList[index] === video) this.attachPortalPlayer(video, index);
+          if (!this.portalAlive || this.videoList[index] !== video) return;
+          const retryRef = this.$refs[`portalVideo${index}`];
+          const retryElement = Array.isArray(retryRef) ? retryRef[0] : retryRef;
+          if (retryElement) this.attachPortalPlayer(video, index);
         });
         return;
       }
@@ -763,10 +805,22 @@ export default {
       window.clearTimeout(this.portalStartTimers[index]);
       this.$delete(this.portalStartTimers, index);
     },
+    cancelPortalStart(index) {
+      const request = this.portalStartRequests[index];
+      if (!request) return;
+      this.$delete(this.portalStartRequests, index);
+      if (typeof request.cancel === "function") request.cancel();
+    },
+    cancelPortalStarts() {
+      Object.keys(this.portalStartRequests).forEach(index => this.cancelPortalStart(index));
+    },
     stopPortalVideo(video, index) {
       this.clearPortalStartTimer(index);
+      this.cancelPortalStart(index);
       this.destroyPortalPlayer(index);
+      // 拉流还没成功就切走时，没有可停的流。再发 stop 只会继续占浏览器连接。
       if (!video || !video.stationCode || !video.cameraCode) return Promise.resolve(null);
+      if (!video.streamId && !video.playUrl && !video.flvUrl) return Promise.resolve(null);
       return stopRealtimeVideo({ stationCode: video.stationCode, cameraCode: video.cameraCode }).catch(() => null);
     },
     stopPortalVideos() {
@@ -801,7 +855,7 @@ export default {
     loadInspectionOverview() {
       const requestSerial = ++this.overviewRequestSerial;
       const params = this.overviewStationId ? { stationCode: this.overviewStationId } : {};
-      return getInspectionOverview(params).then(response => {
+      return getInspectionOverview(params, this.portalRequestConfig()).then(response => {
         if (requestSerial !== this.overviewRequestSerial) return;
         const rows = Array.isArray(response && response.data) ? response.data : [];
         const rowByCategory = rows.reduce((result, item) => {
@@ -823,7 +877,8 @@ export default {
             importantDefects: toCount(item.seriousCount) + toCount(item.urgentCount)
           };
         });
-      }).catch(() => {
+      }).catch((error) => {
+        if (this.isPortalCancel(error)) return;
         if (requestSerial === this.overviewRequestSerial) {
           this.overviewList = createEmptyOverview();
         }
@@ -836,7 +891,7 @@ export default {
         dateType: this.trendGranularity
       };
       if (this.trendStationId) params.stationCode = this.trendStationId;
-      return getDefectTrend(params).then(response => {
+      return getDefectTrend(params, this.portalRequestConfig()).then(response => {
         if (requestSerial !== this.trendRequestSerial) return;
         const rows = (Array.isArray(response && response.data) ? response.data : [])
           .slice()
@@ -850,7 +905,8 @@ export default {
             { name: "重大缺陷", data: rows.map(item => toCount(item.urgentCount)) }
           ]
         };
-      }).catch(() => {
+      }).catch((error) => {
+        if (this.isPortalCancel(error)) return;
         if (requestSerial === this.trendRequestSerial) {
           this.trend = createEmptyTrend();
         }
@@ -897,15 +953,28 @@ export default {
         this.defectCarouselTimer = null;
       }
     },
+    releasePortalPage() {
+      // 点击切换和组件销毁都会走到这里，只释放一次，避免停流发两遍。
+      if (this.portalReleased) return;
+      this.portalReleased = true;
+      // 先标记页面已离开，再取消拉流。否则慢返回的 start 还会去挂播放器。
+      this.portalAlive = false;
+      this.pauseDefectCarousel();
+      this.cancelPortalRequests();
+      this.cancelPortalStarts();
+      this.stopPortalVideos();
+    },
     onNavClick(item) {
       if (item.key === "home") {
-        this.$router.push("/portal");
+        if (this.$route.path !== "/portal") this.$router.push("/portal").catch(() => undefined);
       } else if (item.key === "patrol") {
         // 动环巡检：进入单站系统（即原后台，默认当前部署站的首页），
         // 打上来源标记后单站内保留 module-subbar 横向导航，便于返回门户
         this.$store.dispatch("siteContext/markFromPortal");
         this.$store.dispatch("siteContext/exitSite");
-        this.$router.push("/index");
+        // 先把首页还没回来的请求清掉，再跳转。否则拉流会占住浏览器连接，动环巡检的列表一直 pending。
+        this.releasePortalPage();
+        this.$router.push("/index").catch(() => undefined);
       } else if (item.key === "system") {
         this.$router.push("/system/user");
       }
diff --git a/src/views/video/LivePreview.vue b/src/views/video/LivePreview.vue
index a1af683..0564793 100644
--- a/src/views/video/LivePreview.vue
+++ b/src/views/video/LivePreview.vue
@@ -326,11 +326,10 @@ const PTZ_CODES = {
     }
   },
   computed: {
-    // 打包模式决定视频接口：build:agg 走汇聚接口，build:htjc6 走单站接口。
-    // 其它未配置的模式仍按是否从门户进入判断。
+    // 嵌入页，以及从汇聚门户进入的动环巡检，走聚合视频接口；直接打开的站端走单站接口。
     isAggMode() {
-      if (process.env.VUE_APP_AGG_VIDEO === 'true') return true
-      if (process.env.VUE_APP_AGG_VIDEO === 'false') return false
+      const path = this.$route && this.$route.path
+      if (path === '/video-preview-embed') return true
       return this.$store.getters.fromPortal
     },
     capacity() { return this.layout },
@@ -549,7 +548,7 @@ const PTZ_CODES = {
           ? startRealtimeVideo({ stationCode: channel.stationCode, cameraCode: channel.cameraCode })
           : startLive(channel, streamType)
         const result = await slot.startPromise
-        if (this.slots[index] !== slot) return
+        if (!this.pageActive || this.slots[index] !== slot) return
         this.applyLiveResult(index, slot, result)
         if (!slot.streamSource.hlsUrl && !slot.streamSource.flvUrl) {
           if (this.isAggMode) {
@@ -562,6 +561,8 @@ const PTZ_CODES = {
         }
         if (index === this.activeIndex) this.loadPresets(true)
       } catch (error) {
+        // 切页取消的拉流不是播放失败，不能再弹错误，也不能继续占着画面。
+        if (!this.pageActive || (error && error.code === 'ERR_CANCELED')) return
         if (this.slots[index] === slot) {
           this.$set(this.slots, index, null)
           this.$message.error(error.message)
@@ -605,6 +606,12 @@ const PTZ_CODES = {
         this.presets = []
         this.presetId = null
       }
+      const startWasPending = slot.loading && slot.startPromise && typeof slot.startPromise.cancel === 'function'
+      if (startWasPending) {
+        // 拉流还在排队或卡住时直接取消，不能等它回来再停流，否则浏览器连接一直被占着。
+        slot.startPromise.cancel()
+        return
+      }
       if (slot.startPromise) {
         try { await slot.startPromise } catch (_) { /* no stream session was created */ }
       }