修复 SDK 同源资源加载

将生产环境 SDK 接口、H5 基座和模型资源配置为同源访问，避免 HTTPS 页面请求 HTTP 后端或 MinIO 资源时触发混合内容拦截。

同步更新环境变量模板，并移除导览页中废弃的 3D 视角切换入口。

src/pages/index/index.vue

@@ -41,8 +41,6 @@
       zoom-controls-top="calc(100vh - 284px)"
       show-more-control
       more-control-bottom="54px"
-      :tools="guide3DTools"
-      :camera-view="guideCameraView"
       :route-preview="activeRoutePreview"
       :show-route="Boolean(activeRoutePreview)"
       :auto-switch-threshold-low="0.58"
@@ -54,7 +52,6 @@
       @indoor-view-change="handleIndoorViewChange"
       @poi-click="handleGuidePoiClick"
       @selection-clear="handleGuideSelectionClear"
-      @tool-click="handleGuideToolClick"
       @more-click="handleGuideMoreClick"
       @auto-switch="handleAutoSwitch"
       @map-tap="handleMapTapForOutdoorNav"
@@ -345,9 +342,6 @@ const normalizeGuideFloorId = (labelOrId: string) => guideUseCase.normalizeFloor
 const indoorLayerMode = computed<LayerDisplayMode>(() => (
   indoorView.value === 'multi' ? 'multi' : 'single'
 ))
-const guide3DTools = computed(() => {
-  return is3DMode.value ? ['视角'] : []
-})
 
 const routePlanSummary = computed(() => {
   if (activeRoutePreview.value) {
@@ -708,16 +702,6 @@ const handleSelectedPoiRelated = () => {
   })
 }
 
-const guideCameraView = ref<'reset' | 'top' | 'oblique'>('reset')
-
-const handleGuideToolClick = (_tool: string) => {
-  // 视角循环切换：重置 -> 俯视 -> 斜视 -> 重置
-  const viewOrder: Array<'reset' | 'top' | 'oblique'> = ['reset', 'top', 'oblique']
-  const currentIndex = viewOrder.indexOf(guideCameraView.value)
-  const nextIndex = (currentIndex + 1) % viewOrder.length
-  guideCameraView.value = viewOrder[nextIndex]
-}
-
 const loadRouteTargets = async (keyword = '') => {
   routeTargetsLoading.value = true
   routeTargetsError.value = ''