refactor(holographic): 移除 DeviceOrientationEvent 路径

- 删 startGyro / startDeviceOrientation / stopGyro
- 删 accelHandler / accelBaselineReady 等基线追踪状态
- simulate(x, y) 成为唯一驱动入口
- 保留 onMounted / onUnmounted 钩子（如果外部有需要可保留，否则删）

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/composables/useHolographicPreview.js

@@ -1,10 +1,10 @@
 /**
  * 全息镭射卡预览组合式函数
  *
- * 集成 WebGL HolographicEngine + 陀螺仪/触摸交互
- * 与现有 useLenticularPreview / useLenticularStudioTilt 架构保持一致
+ * 集成 WebGL HolographicEngine + 触摸交互
+ * simulate(x, y) 是唯一驱动入口
  */
-import { ref, reactive, onMounted, onUnmounted } from 'vue'
+import { ref, reactive } from 'vue'
 
 function clamp(v, min, max) { return Math.max(min, Math.min(max, v)) }
 function lerp(a, b, t) { return a + (b - a) * t }
@@ -18,17 +18,10 @@ export function useHolographicPreview() {
     gyroSimEnabled: true,
   })
   const viewAngle = reactive({ x: 0, y: 0, z: 0 })
-  const gyroSource = ref('simulation')
   const isWebGLReady = ref(false)
   const hasWebGLError = ref(false)
   const fps = ref(0)
 
-  let accelHandler = null
-  let accelSmoothed = 0
-  let accelBaselineReady = false
-  let accelBaseX = 0
-  let accelBaseY = 0
-
   function simulate(x, y) {
     viewAngle.x = clamp(x, -1, 1)
     viewAngle.y = clamp(y != null ? y : 0, -1, 1)
@@ -41,73 +34,14 @@ export function useHolographicPreview() {
     viewAngle.z *= factor
   }
 
-  function startGyro() {
-    gyroSource.value = 'simulation'
-    if (typeof DeviceOrientationEvent === 'undefined') return
-
-    if (typeof DeviceOrientationEvent.requestPermission === 'function') {
-      gyroSource.value = 'deviceorientation-requesting'
-      DeviceOrientationEvent.requestPermission()
-        .then(state => { if (state === 'granted') startDeviceOrientation() })
-        .catch(() => { gyroSource.value = 'simulation' })
-    } else {
-      startDeviceOrientation()
-    }
-  }
-
-  function startDeviceOrientation() {
-    gyroSource.value = 'deviceorientation'
-    const handler = (e) => {
-      if (e.gamma == null || e.beta == null) return
-      const gamma = e.gamma || 0
-      const beta = e.beta || 0
-      if (!accelBaselineReady) {
-        accelBaseX = lerp(accelBaseX, gamma, 0.08)
-        accelBaseY = lerp(accelBaseY, beta, 0.08)
-        if (Math.abs(accelBaseX - gamma) < 0.3 && Math.abs(accelBaseY - beta) < 0.3) {
-          accelBaselineReady = true
-        }
-        return
-      }
-      const stab = clamp(physics.angleStability / 100, 0, 1)
-      const sens = physics.tiltSensitivity / 100
-      const k = 0.02 + (1 - stab) * 0.08
-      const dx = (gamma - accelBaseX) / 45 * sens
-      const dy = (beta - accelBaseY) / 45 * sens
-      accelSmoothed = lerp(accelSmoothed, dx, k)
-      const dead = physics.sensorDeadzoneStrength || 1
-      const db = 0.08 * dead
-      simulate(
-        Math.abs(accelSmoothed) < db ? 0 : clamp(accelSmoothed, -1, 1),
-        clamp(dy, -1, 1)
-      )
-    }
-    window.addEventListener('deviceorientation', handler, true)
-    accelHandler = handler
-  }
-
-  function stopGyro() {
-    if (accelHandler) {
-      window.removeEventListener('deviceorientation', accelHandler, true)
-      accelHandler = null
-    }
-    gyroSource.value = 'simulation'
-    accelBaselineReady = false
-  }
-
   function onWebGLReady() { isWebGLReady.value = true; hasWebGLError.value = false }
   function onWebGLError() { hasWebGLError.value = true; isWebGLReady.value = false }
   function onFPSUpdate(v) { fps.value = v }
 
-  onMounted(() => {
-    if (physics.gyroSimEnabled) setTimeout(startGyro, 600)
-  })
-  onUnmounted(() => { stopGyro() })
-
   return {
-    physics, viewAngle, gyroSource,
+    physics, viewAngle,
     isWebGLReady, hasWebGLError, fps,
-    simulate, relax, startGyro, stopGyro,
+    simulate, relax,
     onWebGLReady, onWebGLError, onFPSUpdate,
   }
 }