feat(workspace): 画布 2D/3D 切换与车辆相机跟随

- workspaceToolbar API 新增 view/toggle 与 camera/follow
- 画布底栏新增 2D/3D 切换、自动跟随按钮，组件卸载时自动停止跟随
- 地图监控页将选中车辆 id 透传给底栏，并接入监控配置缓存

Co-authored-by: Cursor <cursoragent@cursor.com>

frontends/apps/simple-platform-vue/src/components/workspace/WorkspaceCanvasToolbar.vue

@@ -123,6 +123,29 @@
       <span class="btn-label">录像管理</span>
     </el-button>
 
+    <!-- 2D / 3D 视图切换 -->
+    <el-button
+      size="small"
+      :type="view2D ? 'primary' : 'default'"
+      :loading="busy.view"
+      @click="toggleViewMode"
+    >
+      <el-icon><View /></el-icon>
+      <span class="btn-label">{{ view2D ? '2D' : '3D' }}</span>
+    </el-button>
+
+    <!-- 车辆自动跟随（需先选中车辆） -->
+    <el-button
+      size="small"
+      :type="cameraFollowing ? 'warning' : 'default'"
+      :disabled="!cameraFollowing && followCarId == null"
+      :loading="busy.follow"
+      @click="toggleCameraFollow"
+    >
+      <el-icon><Aim /></el-icon>
+      <span class="btn-label">{{ cameraFollowing ? '停止跟随' : '自动跟随' }}</span>
+    </el-button>
+
     <!-- 选择录像（回放）对话框 -->
     <el-dialog
       v-model="playDialogVisible"
@@ -207,7 +230,8 @@ import {
   CircleClose,
   Document,
   ArrowUp,
-  FirstAidKit
+  FirstAidKit,
+  Aim
 } from '@element-plus/icons-vue'
 import {
   workspaceToolbarApi,
@@ -217,6 +241,14 @@ import {
   type ToolbarState
 } from '@/api/workspaceToolbar'
 
+const props = withDefaults(
+  defineProps<{
+    /** 当前选中的车辆 numeric id（地图监控侧栏/画布选中车辆时传入） */
+    followCarId?: number | null
+  }>(),
+  { followCarId: null }
+)
+
 /**
  * 平台 iframe 画布工具栏（对应 SimpleLite `Panel_4` / `WorkspaceBottomBar.DefineForTerminalEmbedMinimal`）。
  *
@@ -253,7 +285,9 @@ const busy = reactive({
   display: false,
   layer: false,
   recording: false,
-  playback: false
+  playback: false,
+  view: false,
+  follow: false
 })
 
 const playDialogVisible = ref(false)
@@ -270,6 +304,17 @@ const recordLabel = computed(() => {
   return `停止 ${mm}:${ss}`
 })
 
+const view2D = computed(() => state.value?.view?.map2D ?? true)
+
+const cameraFollowing = computed(() => state.value?.view?.follow?.enabled ?? false)
+
+const followCarId = computed(() => {
+  const fromProp = props.followCarId
+  if (fromProp != null && Number.isFinite(fromProp)) return fromProp
+  const fromState = state.value?.view?.follow?.carId
+  return fromState != null && Number.isFinite(fromState) ? fromState : null
+})
+
 async function refresh() {
   try {
     state.value = await workspaceToolbarApi.getState()
@@ -401,6 +446,39 @@ async function openManageDialog() {
   manageDialogVisible.value = true
 }
 
+async function toggleViewMode() {
+  busy.view = true
+  try {
+    state.value = await workspaceToolbarApi.toggleViewMode()
+  } catch (err) {
+    ElMessage.error(`切换视图失败：${(err as Error).message}`)
+  } finally {
+    busy.view = false
+  }
+}
+
+async function toggleCameraFollow() {
+  const carId = followCarId.value
+  if (!cameraFollowing.value && (carId == null || !Number.isFinite(carId))) {
+    ElMessage.warning('请先在车辆列表或 3D 画布中选中一辆车')
+    return
+  }
+  busy.follow = true
+  try {
+    const enable = !cameraFollowing.value
+    state.value = await workspaceToolbarApi.setCameraFollow(carId, enable)
+    if (enable) {
+      ElMessage.success({ message: `已开始跟随车辆 #${carId}`, duration: 1500, grouping: true })
+    } else {
+      ElMessage.info('已停止自动跟随')
+    }
+  } catch (err) {
+    ElMessage.error(`自动跟随失败：${(err as Error).message}`)
+  } finally {
+    busy.follow = false
+  }
+}
+
 function formatSize(bytes: number): string {
   if (!Number.isFinite(bytes) || bytes <= 0) return '0 B'
   if (bytes < 1024) return `${bytes} B`
@@ -430,12 +508,15 @@ onMounted(() => {
   void refresh()
   pollTimer = setInterval(() => {
     const r = state.value?.recording
-    if (r?.isRecording || r?.isPlaying) void refresh()
+    if (r?.isRecording || r?.isPlaying || state.value?.view?.follow?.enabled) void refresh()
   }, 1000)
 })
 
 onBeforeUnmount(() => {
   if (pollTimer) clearInterval(pollTimer)
+  if (cameraFollowing.value) {
+    void workspaceToolbarApi.setCameraFollow(null, false).catch(() => {})
+  }
 })
 </script>