优化首页建筑外观斜视展示与交互体验

- 首页外观模型使用建筑主体包围盒进行相机适配
- 外观首屏改为标准 Y 轴向上的建筑斜视角
- 优化室内三维操作提示与交互反馈

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/pages/index/index.vue

@@ -53,6 +53,7 @@
       @poi-click="handleGuidePoiClick"
       @selection-clear="handleGuideSelectionClear"
       @auto-switch="handleAutoSwitch"
+      @tool-click="handleIndoorToolClick"
       @map-tap="handleMapTapForOutdoorNav"
     >
       <template #overlay>
@@ -339,10 +340,10 @@ const indoorLayerMode = computed<LayerDisplayMode>(() => (
 ))
 const indoorCameraTools = computed(() => (is3DMode.value ? ['复位', '俯视', '斜视'] : []))
 const showIndoorGestureHint = ref(true)
-const indoorGestureHintText = ref('拖动旋转 · 双指缩放 · 点选标记查看位置')
+const indoorGestureHintText = ref('单指旋转 · 双指缩放/平移 · 点选标记查看位置')
 let indoorGestureHintTimer: ReturnType<typeof setTimeout> | null = null
 
-const showIndoorHint = (text = '拖动旋转 · 双指缩放 · 点选标记查看位置', durationMs = 5200) => {
+const showIndoorHint = (text = '单指旋转 · 双指缩放/平移 · 点选标记查看位置', durationMs = 5200) => {
   indoorGestureHintText.value = text
   showIndoorGestureHint.value = is3DMode.value
 
@@ -621,7 +622,7 @@ const handleFloorChange = (floor: string) => {
   indoorView.value = 'floor'
   selectedGuidePoi.value = null
   isPoiCardCollapsed.value = false
-  showIndoorHint(`已切换到 ${floor}，可拖动旋转查看`, 3200)
+  showIndoorHint(`已切换到 ${floor}，单指旋转、双指可平移`, 3200)
   console.log('切换楼层:', floor)
 }
 
@@ -649,6 +650,18 @@ const handleAutoSwitch = (event: { from: 'overview' | 'floor'; to: 'overview' |
   showIndoorHint(event.to === 'floor' ? '已进入单层视图，可点选标记查看位置' : '已返回建筑外观', 3600)
 }
 
+const handleIndoorToolClick = (tool: string) => {
+  if (!is3DMode.value) return
+
+  if (tool === '复位') {
+    showIndoorHint('已复位视角，单指旋转、双指可平移', 2800)
+  } else if (tool === '俯视') {
+    showIndoorHint('已切换俯视视角，可点选标记查看位置', 2800)
+  } else if (tool === '斜视') {
+    showIndoorHint('已切换斜视视角，可查看空间层次', 2800)
+  }
+}
+
 const handleGuidePoiClick = (poi: GuideRenderPoi) => {
   selectedGuidePoi.value = poi
   isPoiCardCollapsed.value = false
@@ -1511,29 +1524,30 @@ const handleExplainBack = () => {
 
 .indoor-gesture-hint {
   position: absolute;
-  top: clamp(174px, 23vh, 228px);
+  top: clamp(136px, 19vh, 190px);
   left: 50%;
-  max-width: calc(100% - 136px);
-  min-height: 34px;
-  padding: 7px 12px;
+  max-width: calc(100% - 112px);
+  min-height: 38px;
+  padding: 8px 14px;
   display: flex;
   align-items: center;
   justify-content: center;
   box-sizing: border-box;
-  background: rgba(21, 23, 19, 0.76);
-  border: 1px solid rgba(255, 255, 255, 0.16);
-  border-radius: 8px;
+  background: rgba(9, 15, 10, 0.9);
+  border: 1px solid rgba(255, 235, 59, 0.36);
+  border-radius: 999px;
+  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
   transform: translateX(-50%);
   pointer-events: none;
-  z-index: 34;
+  z-index: 58;
 }
 
 .indoor-gesture-text {
   min-width: 0;
-  font-size: 12px;
-  line-height: 17px;
-  font-weight: 500;
-  color: #ffffff;
+  font-size: 13px;
+  line-height: 18px;
+  font-weight: 700;
+  color: #f4ff2f;
   text-align: center;
   white-space: normal;
 }