diff --git a/src/api/videosMonitor/index.js b/src/api/videosMonitor/index.js
index 37caf67..4fc3219 100644
--- a/src/api/videosMonitor/index.js
+++ b/src/api/videosMonitor/index.js
@@ -124,6 +124,17 @@ export function taskStatusChange(params) {
     params,
   });
 }
+/**
+ * 按巡视任务执行 ID 删除任务状态。多个 ID 用英文逗号拼在路径里，不传请求体。
+ * @param {string} taskPatrolledIds
+ */
+export function removeTaskStatus(taskPatrolledIds) {
+  return request({
+    url: "/patrol/taskstatus/removeByTaskPatrolledIds/" + taskPatrolledIds,
+    method: "post",
+    headers: { repeatSubmit: false },
+  });
+}
 /**
  * 录像列表
  * @param {*} data
diff --git a/src/layout/components/AppMain.vue b/src/layout/components/AppMain.vue
index d2bd206..bf4d072 100644
--- a/src/layout/components/AppMain.vue
+++ b/src/layout/components/AppMain.vue
@@ -46,7 +46,7 @@ export default {
 
 <style lang="scss" scoped>
 .app-main {
-    /* 5.5vh = navbar，和别家标题栏同一高度 */
+    /* 5.5vh = navbar，和别家标题栏同一高度。标题栏固定后由外边距占位，这里不再重复扣高度 */
   height: calc(100vh - 5.5vh);
   min-height: 0;
   width: 100%;
@@ -54,28 +54,13 @@ export default {
   overflow: hidden;
 }
 
-.fixed-header + .app-main {
-  padding-top: 5.5vh;
-}
-
-.app-main.hasTagsView {
+.app-main.hasTagsView,
+.app-main.patrolWorkspace.hasTagsView {
   /* 5.5vh + 80px = navbar + subbar + tags view */
   height: calc(100vh - 5.5vh - 80px);
   min-height: 0;
 }
 
-.fixed-header + .app-main.hasTagsView {
-  padding-top: calc(5.5vh + 80px);
-}
-
-.app-main.patrolWorkspace.hasTagsView {
-  height: calc(100vh - 5.5vh - 80px);
-}
-
-.fixed-header + .app-main.patrolWorkspace.hasTagsView {
-  padding-top: calc(5.5vh + 80px);
-}
-
 </style>
 
 <style lang="scss">
diff --git a/src/layout/components/TagsView/index.vue b/src/layout/components/TagsView/index.vue
index 39542c6..93f87fa 100644
--- a/src/layout/components/TagsView/index.vue
+++ b/src/layout/components/TagsView/index.vue
@@ -189,12 +189,15 @@ export default {
       routes.forEach(route => {
         if (route.meta && route.meta.affix) {
           const tagPath = path.resolve(basePath, route.path)
-          tags.push({
-            fullPath: tagPath,
-            path: tagPath,
-            name: route.name,
-            meta: { ...route.meta }
-          })
+          // 本地首页和后端菜单可能各有一条同名固定页签，只保留先收集到的那条
+          if (!tags.some(tag => tag.path === tagPath || (tag.meta && tag.meta.title === route.meta.title))) {
+            tags.push({
+              fullPath: tagPath,
+              path: tagPath,
+              name: route.name,
+              meta: { ...route.meta }
+            })
+          }
         }
         if (route.children) {
           const tempTags = this.filterAffixTags(route.children, route.path)
diff --git a/src/layout/index.vue b/src/layout/index.vue
index d2758ae..fb37811 100644
--- a/src/layout/index.vue
+++ b/src/layout/index.vue
@@ -201,8 +201,15 @@ export default {
   }
 
   .layout-header {
-    margin-left: -$base-sidebar-width;
-    width: calc(100% + #{$base-sidebar-width});
+    // 标题栏固定铺满视口，不跟着侧边栏宽度伸缩，收起菜单时标题背景不会被重新拉伸。
+    // 自身脱离文档流，由下面的占位高度把内容顶到原位置
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    // 低于侧边栏（1001），收起按钮仍盖在标题栏之上、可以点击
+    z-index: 1000;
+    margin-left: 0;
 
     .tags-view-container {
       width: calc(100% - #{$base-sidebar-width});
@@ -211,6 +218,14 @@ export default {
     }
   }
 
+  .hasTagsView .layout-header + .app-main {
+    margin-top: calc(5.5vh + 80px);
+  }
+
+  .layout-header + .app-main {
+    margin-top: 5.5vh;
+  }
+
   .module-subbar {
     position: relative;
     width: 100%;
@@ -330,32 +345,14 @@ export default {
     box-shadow: 0 0 14px rgba(63, 255, 254, 0.85);
   }
 
-  .fixed-header {
-    position: fixed;
-    top: 0;
-    left: 0;
-    right: 0;
-    z-index: 1002;
-    margin-left: 0;
-    width: 100%;
-    transition: none;
-  }
-
   .hideSidebar .layout-header {
-    margin-left: -54px;
-    width: calc(100% + 54px);
-
     .tags-view-container {
       width: calc(100% - 54px);
       margin-left: 54px;
     }
-
   }
 
   .sidebarWide .layout-header {
-    margin-left: -$base-sidebar-wide-width;
-    width: calc(100% + #{$base-sidebar-wide-width});
-
     .tags-view-container {
       width: calc(100% - #{$base-sidebar-wide-width});
       margin-left: $base-sidebar-wide-width;
@@ -363,9 +360,6 @@ export default {
   }
 
   .sidebarWide2 .layout-header {
-    margin-left: -$base-sidebar-wide2-width;
-    width: calc(100% + #{$base-sidebar-wide2-width});
-
     .tags-view-container {
       width: calc(100% - #{$base-sidebar-wide2-width});
       margin-left: $base-sidebar-wide2-width;
@@ -373,9 +367,6 @@ export default {
   }
 
   .sidebarWide3 .layout-header {
-    margin-left: -$base-sidebar-wide3-width;
-    width: calc(100% + #{$base-sidebar-wide3-width});
-
     .tags-view-container {
       width: calc(100% - #{$base-sidebar-wide3-width});
       margin-left: $base-sidebar-wide3-width;
@@ -386,21 +377,12 @@ export default {
     margin-left: 54px;
   }
 
-  .hideSidebar .fixed-header {
-    margin-left: 0;
-    width: 100%;
-  }
-
   .sidebarHide .layout-header,
   .mobile .layout-header {
-    margin-left: 0;
-    width: 100%;
-
     .tags-view-container {
       width: 100%;
       margin-left: 0;
     }
-
   }
 
   .sidebarHide .module-links,
diff --git a/src/router/index.js b/src/router/index.js
index 9f7bbba..3e96046 100644
--- a/src/router/index.js
+++ b/src/router/index.js
@@ -48,12 +48,13 @@ export const constantRoutes = [
     path: '/xfdh',
     component: Layout,
     hidden: true,
-    redirect: '/xfdh/index',
+    // 与默认首页 /index 是同一页，重定向过去复用固定页签，避免再开一个「巡检任务」
+    redirect: '/index',
     meta: { title: '巡检任务', xfdhHeader: true },
     children: [
       {
         path: 'index',
-        component: () => import('@/views/cards/taskSummary/inspectionTask'),
+        redirect: '/index',
         name: 'XfdhIndex',
         meta: { title: '巡检任务', activeMenu: '/task-summary/inspectionTask', xfdhHeader: true }
       }
diff --git a/src/store/modules/tagsView.js b/src/store/modules/tagsView.js
index 7a70013..a54975d 100644
--- a/src/store/modules/tagsView.js
+++ b/src/store/modules/tagsView.js
@@ -15,9 +15,13 @@ const mutations = {
   },
   ADD_VISITED_VIEW: (state, view) => {
     if (state.visitedViews.some(v => v.path === view.path)) return
+    // 本地首页已经固定了一个「巡检任务」页签。后端菜单如果再带一条同名固定页签，
+    // 路径不同也会被当成新页签，登录后就会出现两个「巡检任务」。
+    const title = view.meta && view.meta.title
+    if (view.meta && view.meta.affix && title && state.visitedViews.some(v => v.meta && v.meta.affix && v.meta.title === title)) return
     state.visitedViews.push(
       Object.assign({}, view, {
-        title: view.meta.title || 'no-name'
+        title: title || 'no-name'
       })
     )
   },
diff --git a/src/views/cards/assets/styles/index.scss b/src/views/cards/assets/styles/index.scss
index c2d5542..952a7b9 100644
--- a/src/views/cards/assets/styles/index.scss
+++ b/src/views/cards/assets/styles/index.scss
@@ -720,21 +720,7 @@
   padding-bottom: 0;
 
   .el-message-box__header {
-    background-color: #222F3D;
-    color: #fff;
-    border-bottom: #40486a 1px solid;
-    height: 63px;
-    padding: 17px 24px;
-
-
-    .el-message-box__headerbtn .el-message-box__close {
-      color: #fff;
-    }
-
-    .el-message-box__title {
-      color: #fff;
-      font-size: 20px;
-    }
+    display: none;
   }
 
   .el-message-box__content {
diff --git a/src/views/cards/taskSummary/inspectionTask.vue b/src/views/cards/taskSummary/inspectionTask.vue
index a8534d5..c127963 100644
--- a/src/views/cards/taskSummary/inspectionTask.vue
+++ b/src/views/cards/taskSummary/inspectionTask.vue
@@ -296,6 +296,14 @@
                 @click="gotoTask('4', scope.row.lineId, scope.row)"
                 >终止</el-button
               >
+              <el-button
+                class="task-row-btn"
+                type="primary"
+                size="mini"
+                :disabled="!scope.row.taskPatrolledId"
+                @click="deleteTask(scope.row)"
+                >删除</el-button
+              >
             </template>
           </el-table-column>
         </el-table>
@@ -494,7 +502,7 @@ 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 { list, areaList, taskStatusChange, removeTaskStatus } from "@/api/videosMonitor/index";
 import { listData } from "@/api/system/dict/data";
 import { listUser } from "@/api/system/user";
 import modelDialog from "../components/model-dialog.vue";
@@ -1007,6 +1015,43 @@ export default {
         },
       });
     },
+    deleteTask(row) {
+      const taskPatrolledId = row && row.taskPatrolledId;
+      if (!taskPatrolledId) {
+        this.$message.warning("缺少任务执行ID，无法删除");
+        return;
+      }
+      const taskName = row.taskName || "该任务";
+      this.$confirm(
+        `删除后不可恢复，确认删除「${taskName}」吗？`,
+        {
+          title: "提示",
+          customClass: "card-page card-message-box",
+          type: "warning",
+        }
+      ).then(() => {
+        removeTaskStatus(taskPatrolledId).then((res) => {
+          const body = res && res.data && typeof res.data === "object"
+            ? Object.assign({}, res, res.data)
+            : (res || {});
+          const status = body.status !== undefined ? body.status : body.code;
+          const failed = [false, 0, "0", 500, "500", "fail", "failed"].includes(status);
+          if (failed) {
+            this.$modal.msgWarning(body.msg || "删除失败");
+            return;
+          }
+          if (body.pushSuccess === false) {
+            this.$modal.msgWarning("删除成功");
+          } else {
+            this.$modal.msgSuccess("删除成功");
+          }
+          this.selectedRows = this.selectedRows.filter(
+            (item) => item.taskPatrolledId !== taskPatrolledId
+          );
+          this.getList();
+        });
+      });
+    },
     gotoTask(command, lineId, row) {
       this.$confirm("确认操作吗？", {
         title: "提示",
diff --git a/src/views/portal/components/PortalDeviceTree.vue b/src/views/portal/components/PortalDeviceTree.vue
index ea01757..6e5d2af 100644
--- a/src/views/portal/components/PortalDeviceTree.vue
+++ b/src/views/portal/components/PortalDeviceTree.vue
@@ -2,7 +2,7 @@
   <aside class="portal-tree">
     <div class="tree-title">
       <span><i class="el-icon-s-platform" /> 设备列表</span>
-      <strong>{{ channelNodes.length }}</strong>
+      <strong>{{ visibleChannelCount }}</strong>
     </div>
     <div class="tree-filters">
       <el-select v-model="onlineStatus" size="small" placeholder="状态" clearable>
@@ -98,6 +98,10 @@ export default {
   computed: {
     channelNodes() {
       return flatten(this.treeNodes).filter(node => node.channelFlag);
+    },
+    // 标题数字跟当前筛选走：在线/离线/搜索后只统计树上还看得到的通道
+    visibleChannelCount() {
+      return flatten(this.treeData).filter(node => node.channelFlag).length;
     }
   },
   watch: {
diff --git a/src/views/video/LivePreview.vue b/src/views/video/LivePreview.vue
index 4632d41..b08026e 100644
--- a/src/views/video/LivePreview.vue
+++ b/src/views/video/LivePreview.vue
@@ -79,8 +79,8 @@
               </div>
               <div class="camera-actions">
                 <button v-if="!embed" type="button" title="历史回放" @click.stop="openPlayback(slot)"><i class="el-icon-time" /></button>
-                <button type="button" title="全屏" @click.stop="fullscreen(index)"><i class="el-icon-full-screen" /></button>
-                <button type="button" title="关闭" @click.stop="closeSlot(index)"><i class="el-icon-close" /></button>
+                <button type="button" :title="fullscreenIndex === index ? '退出放大' : '全屏'" @click.stop="fullscreen(index)"><i class="el-icon-full-screen" /></button>
+                <button type="button" :title="fullscreenIndex === index ? '退出放大' : '关闭'" @click.stop="closePreview(index)"><i class="el-icon-close" /></button>
               </div>
             </template>
             <div v-else class="empty-slot">
@@ -405,6 +405,7 @@ const PTZ_CODES = {
       this.$root.$emit('video-control-panel-updated', this.controlPanelExpanded)
     }
     document.addEventListener('fullscreenchange', this.handleFullscreenChange)
+    document.addEventListener('webkitfullscreenchange', this.handleFullscreenChange)
     if (this.embed) {
       this.layout = this.normalizeLayout(this.embedLayout)
       this.embedTreeVisible = this.embedTreeExpanded
@@ -434,6 +435,7 @@ const PTZ_CODES = {
     this.lifecycleId += 1
     this.pageActive = false
     document.removeEventListener('fullscreenchange', this.handleFullscreenChange)
+    document.removeEventListener('webkitfullscreenchange', this.handleFullscreenChange)
     if (!this.embed) {
       this.$root.$off('video-layout-change', this.changeLayout)
       this.$root.$off('video-control-panel-change', this.changeControlPanel)
@@ -657,9 +659,27 @@ const PTZ_CODES = {
       this.selectChannel(channel)
       this.startChannel(channel)
     },
+    isSameCamera(left, right) {
+      if (!left || !right || !left.cameraCode || left.cameraCode !== right.cameraCode) return false
+      if (left.stationCode && right.stationCode && left.stationCode !== right.stationCode) return false
+      return true
+    },
+    // 同一摄像头只保留最新的一路，避免宫格里出现两路相同画面
+    async closeEarlierCopies(channel, keepIndex) {
+      const indexes = []
+      this.slots.forEach((slot, slotIndex) => {
+        if (slotIndex === keepIndex || !this.isSameCamera(slot, channel)) return
+        indexes.push(slotIndex)
+      })
+      for (const slotIndex of indexes) {
+        await this.closeSlot(slotIndex, false)
+      }
+    },
     async startChannel(channel, targetIndex = this.activeIndex, attemptedCameraCodes = [], streamType = this.streamType) {
       if (!this.pageActive || !channel || !channel.cameraCode) return
       const index = targetIndex
+      await this.closeEarlierCopies(channel, index)
+      if (!this.pageActive) return
       const current = this.slots[index]
       if (current && current.cameraCode === channel.cameraCode && current.streamType === streamType) {
         this.controlTarget = current
@@ -890,13 +910,35 @@ const PTZ_CODES = {
         this.$message.error((error && error.message) || '视频播放失败，暂无其他可用摄像头')
       }
     },
+    fullscreenElement() {
+      return document.fullscreenElement || document.webkitFullscreenElement || null
+    },
+    exitFullscreen() {
+      const exit = document.exitFullscreen || document.webkitExitFullscreen
+      if (exit) return exit.call(document)
+    },
     fullscreen(index) {
       const card = this.$refs.cameraCards && this.$refs.cameraCards[index]
-      if (card && card.requestFullscreen) card.requestFullscreen()
+      if (!card) return
+      if (this.fullscreenElement() === card) {
+        this.exitFullscreen()
+        return
+      }
+      const request = card.requestFullscreen || card.webkitRequestFullscreen
+      if (request) request.call(card)
+    },
+    // 放大后右下角关闭和全屏按钮一样，只退出放大，不停掉这一路视频
+    closePreview(index) {
+      const card = this.$refs.cameraCards && this.$refs.cameraCards[index]
+      if (card && this.fullscreenElement() === card) {
+        this.exitFullscreen()
+        return
+      }
+      this.closeSlot(index)
     },
     // 放大（全屏）观看时切主码流，退出全屏后恢复当前布局对应的码流
     async handleFullscreenChange() {
-      const fsElement = document.fullscreenElement
+      const fsElement = this.fullscreenElement()
       if (fsElement) {
         const cards = this.$refs.cameraCards || []
         const index = cards.indexOf(fsElement)
@@ -1159,7 +1201,7 @@ const PTZ_CODES = {
 .camera-grid { flex: 1; min-height: 0; display: grid; gap: 3px; background: rgba(14, 75, 146, .5); border: 1px solid #176bc2; }
 .camera-card { position: relative; min-width: 0; min-height: 0; overflow: hidden; border: 1px solid transparent; background: #050b24; cursor: pointer; }.camera-card.active { border-color: #54ffff; box-shadow: inset 0 0 0 1px rgba(84,255,255,.35); }
 .camera-label { position: absolute; left: 0; right: 0; top: 0; height: 28px; padding: 0 8px; display: flex; align-items: center; justify-content: space-between; color: #d8eaff; background: linear-gradient(180deg, rgba(0,10,36,.92), transparent); font-size: 11px; pointer-events: none; user-select: none; }.camera-label i { display: inline-block; width: 6px; height: 6px; margin-right: 5px; border-radius: 50%; background: #24e39f; box-shadow: 0 0 6px #24e39f; }
-.camera-actions { position: absolute; right: 5px; bottom: 5px; display: none; gap: 3px; }.camera-card:hover .camera-actions { display: flex; }.camera-actions button { width: 26px; height: 25px; border: 1px solid rgba(66, 167, 255, .55); color: #bfe0ff; background: rgba(4,28,78,.88); cursor: pointer; }
+.camera-actions { position: absolute; right: 5px; bottom: 5px; display: none; gap: 3px; }.camera-card:hover .camera-actions, .camera-card:fullscreen .camera-actions, .camera-card:-webkit-full-screen .camera-actions { display: flex; }.camera-actions button { width: 26px; height: 25px; border: 1px solid rgba(66, 167, 255, .55); color: #bfe0ff; background: rgba(4,28,78,.88); cursor: pointer; }
 .empty-slot { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; color: #466f9c; background: radial-gradient(circle at center, #0b2a61, #050b24 70%); user-select: none; }.empty-slot i { font-size: 28px; }.empty-slot span { font-size: 11px; }
 .control-panel { position: absolute; top: 0; right: 0; bottom: 0; z-index: 4; width: 242px; min-width: 242px; height: auto; margin: 0; overflow: visible; border: 1px solid rgba(63,127,216,.72); border-radius: 2px; background: rgba(7, 24, 78, .82); box-sizing: border-box; cursor: move; user-select: none; }
 .control-panel-body { height: 100%; padding: 10px; overflow-x: hidden; overflow-y: auto; box-sizing: border-box; }
diff --git a/src/views/video/components/NvrDeviceTree.vue b/src/views/video/components/NvrDeviceTree.vue
index 008b046..1cb937c 100644
--- a/src/views/video/components/NvrDeviceTree.vue
+++ b/src/views/video/components/NvrDeviceTree.vue
@@ -2,7 +2,7 @@
   <aside class="nvr-tree">
     <div class="tree-title">
       <span><i class="el-icon-s-platform" /> 设备列表</span>
-      <strong>{{ channelNodes.length }}</strong>
+      <strong>{{ visibleChannelCount }}</strong>
     </div>
     <div class="tree-filters">
       <el-select v-model="onlineStatus" size="small" placeholder="状态" clearable>
@@ -106,7 +106,9 @@ export default {
   },
   computed: {
     isLoading() { return this.loading || this.internalLoading },
-    channelNodes() { return flatten(this.treeNodes).filter(node => node.channelFlag) }
+    channelNodes() { return flatten(this.treeNodes).filter(node => node.channelFlag) },
+    // 标题数字跟当前筛选走：在线/离线/搜索后只统计树上还看得到的通道
+    visibleChannelCount() { return flatten(this.treeData).filter(node => node.channelFlag).length }
   },
   watch: {
     onlineStatus: 'refreshTree',