完善馆内点位展示与微信地图桥接

tests/unit/poiDomLabels.spec.ts

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+import { describe, expect, it } from 'vitest'
+import * as THREE from 'three'
+import {
+  domLabelBoundsOverlap,
+  getDomLabelBounds,
+  isDomLabelWithinViewport,
+  projectObjectToDom
+} from '@/components/map/poiDomLabels'
+
+describe('POI DOM label projection and collision', () => {
+  it('projects a world-space anchor to CSS pixels', () => {
+    const camera = new THREE.PerspectiveCamera(60, 2, 0.1, 100)
+    camera.position.set(0, 0, 10)
+    camera.lookAt(0, 0, 0)
+    camera.updateProjectionMatrix()
+    camera.updateMatrixWorld()
+
+    const anchor = new THREE.Object3D()
+    anchor.position.set(0, 0, 0)
+    expect(projectObjectToDom(anchor, camera, 390, 195)).toEqual({ x: 195, y: 97.5 })
+  })
+
+  it('uses measured DOM dimensions for bottom-anchored overlap checks', () => {
+    const hall = getDomLabelBounds({ x: 120, y: 100 }, { width: 146, height: 38 }, 'bottom')
+    const facility = getDomLabelBounds({ x: 240, y: 100 }, { width: 88, height: 32 }, 'bottom')
+
+    expect(domLabelBoundsOverlap(hall, facility, 6)).toBe(true)
+    expect(isDomLabelWithinViewport(hall, 390, 844)).toBe(true)
+    expect(isDomLabelWithinViewport(getDomLabelBounds({ x: 5, y: 10 }, { width: 88, height: 32 }, 'bottom'), 390, 844)).toBe(false)
+  })
+})