diff --git a/docs/module-federation-guide.md b/docs/module-federation-guide.md
index 92c1a4bb..0dc0939e 100644
--- a/docs/module-federation-guide.md
+++ b/docs/module-federation-guide.md
@@ -322,7 +322,21 @@ const emit = defineEmits(['action'])
 
 `nativeSubscribe` 和 Toast 都由主应用宿主提供。插件不应复制主程序订阅弹窗，也不应自行创建另一套 Toast 容器。插件在旧版主程序或能力不存在的环境中运行时，应保留空值判断和必要的页面内 fallback。
 
-### 5.6 调用主应用原生订阅
+### 5.6 玻璃光学表面
+
+主应用的 `Page`、`Config` 与 `AppPage` 宿主在玻璃主题下默认采用 `static-material` 光学模式：保留壁纸透射、材质色调和方向反射，但不响应指针流场、局部折射、拖尾或动态焦散。插件列表与 `Dashboard` 继续使用完整动态光学。视觉型插件可以在自己控制的 DOM 区域显式恢复完整动态光学：
+
+```html
+<div data-glass-optical-surface data-glass-optical-mode="dynamic">
+  <!-- 插件自己的视觉内容 -->
+</div>
+```
+
+使用时需同时声明 `data-glass-optical-surface` 和 `data-glass-optical-mode="dynamic"`。模式会从最近的祖先容器继承，因此显式声明的动态子表面不会沿用宿主的静态模式。该合同适用于插件在 `Page`、`Config` 或 `AppPage` 中自行渲染并控制的区域；主应用生成的插件列表、插件市场卡片、`Dashboard` 及其他宿主 DOM 不属于插件的修改边界。
+
+动态模式只在主应用启用玻璃主题和实时光学能力时生效。其他主题、降低动态效果或光学能力不可用时，插件必须保持内容与交互正常，不应依赖动态光学表达业务状态或必要反馈。
+
+### 5.7 调用主应用原生订阅
 
 `Page`、`Config`、`Dashboard` 与 `AppPage` 都会收到 `nativeSubscribe(mediaInfo)` prop。插件传入媒体信息后，电视剧会打开主应用的选季抽屉，电影会进入现有电影订阅流程。宿主也会用 `moviepilot:nativeSubscribe` 键提供同一个方法，深层子组件可以使用 `inject`，无需逐层传递 prop。
 
@@ -357,7 +371,7 @@ async function subscribeMedia(mediaInfo: Record<string, unknown>) {
 
 `success: true` 表示主应用已接受调用并启动原生交互，不表示用户已经完成订阅。字段无效或当前用户没有订阅权限时返回 `success: false`，插件可以依据 `code` 执行 fallback。
 
-### 5.7 调用主应用 Toast
+### 5.8 调用主应用 Toast
 
 `Page`、`Config`、`Dashboard` 与 `AppPage` 的宿主容器会通过固定键提供主应用 Toast。远程组件应复用该实例，不要自行渲染 `VSnackbar` 或创建另一套 Toast 容器：
 
diff --git a/src/App.vue b/src/App.vue
index bae90a9e..c32f5279 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -29,6 +29,7 @@ import { useGlobalOfflineStatus, type ConnectionFailureReason } from '@/composab
 import { useAppActivityLifecycle } from '@/composables/useAppActivityLifecycle'
 import {
   BACKGROUND_ROTATION_GRACE_MS,
+  createBackgroundCandidateOrderResolver,
   findFirstAvailableBackground,
   preloadBackgroundRotationImages,
   shouldAllowBackgroundRotation,
@@ -87,6 +88,7 @@ const previousImageIndex = ref<number | null>(null)
 const isBackgroundCrossfading = ref(false)
 const backgroundCrossfadeStartedAt = ref(0)
 const pendingOpticalBackgroundImage = ref('')
+const resolveBackgroundCandidateOrder = createBackgroundCandidateOrderResolver()
 const { allowsDecorativeMotion, isSuspended: isRenderThrottled, state: appActivityState } = useAppActivityLifecycle()
 const preferredMotion = usePreferredReducedMotion()
 const backgroundRotationGraceActive = ref(false)
@@ -718,7 +720,7 @@ async function removeLoadingWithStateCheck() {
 async function loadBackgroundImages(loadVersion: number, retryCount = 0) {
   const maxRetries = 3
   try {
-    const images = await fetchBackgroundImages()
+    const images = resolveBackgroundCandidateOrder(await fetchBackgroundImages())
     if (loadVersion !== backgroundLoadVersion) return
 
     const firstAvailableIndex = await findFirstAvailableBackground({
diff --git a/src/components/dialog/PluginConfigDialog.vue b/src/components/dialog/PluginConfigDialog.vue
index 7b0d6048..290cda0d 100644
--- a/src/components/dialog/PluginConfigDialog.vue
+++ b/src/components/dialog/PluginConfigDialog.vue
@@ -173,7 +173,12 @@ onBeforeMount(async () => {
 <template>
   <VDialog scrollable :max-width="dialogMaxWidth" :fullscreen="!display.mdAndUp.value">
     <!-- Vuetify 渲染模式 -->
-    <VCard v-if="renderMode === 'vuetify'" :title="`${props.plugin?.plugin_name} - ${t('dialog.pluginConfig.title')}`">
+    <VCard
+      v-if="renderMode === 'vuetify'"
+      :title="`${props.plugin?.plugin_name} - ${t('dialog.pluginConfig.title')}`"
+      data-glass-optical-surface
+      data-glass-optical-mode="static-material"
+    >
       <VDialogCloseBtn @click="emit('close')" />
       <VDivider />
       <LoadingBanner v-if="!isRefreshed" class="mt-5" />
@@ -208,7 +213,7 @@ onBeforeMount(async () => {
       </VCardActions>
     </VCard>
     <!-- Vue 渲染模式 -->
-    <VCard v-else-if="renderMode === 'vue'">
+    <VCard v-else-if="renderMode === 'vue'" data-glass-optical-surface data-glass-optical-mode="static-material">
       <VCardText class="pa-0">
         <component
           :is="dynamicComponent"
diff --git a/src/components/dialog/PluginDataDialog.vue b/src/components/dialog/PluginDataDialog.vue
index 20bddfc2..c9b6d45e 100644
--- a/src/components/dialog/PluginDataDialog.vue
+++ b/src/components/dialog/PluginDataDialog.vue
@@ -136,7 +136,12 @@ onMounted(() => {
 <template>
   <VDialog scrollable max-width="80rem" :fullscreen="!display.mdAndUp.value">
     <!-- Vuetify 渲染模式 -->
-    <VCard v-if="renderMode === 'vuetify'" :title="`${props.plugin?.plugin_name}`">
+    <VCard
+      v-if="renderMode === 'vuetify'"
+      :title="`${props.plugin?.plugin_name}`"
+      data-glass-optical-surface
+      data-glass-optical-mode="static-material"
+    >
       <VDialogCloseBtn @click="emit('close')" />
       <LoadingBanner v-if="!isRefreshed" class="mt-5" />
       <VCardText v-else class="min-h-40">
@@ -158,7 +163,7 @@ onMounted(() => {
       />
     </VCard>
     <!-- Vue 渲染模式 -->
-    <VCard v-else-if="renderMode === 'vue'">
+    <VCard v-else-if="renderMode === 'vue'" data-glass-optical-surface data-glass-optical-mode="static-material">
       <VCardText class="pa-0">
         <component
           :is="dynamicComponent"
diff --git a/src/composables/__tests__/useDynamicHeaderTab.spec.ts b/src/composables/__tests__/useDynamicHeaderTab.spec.ts
new file mode 100644
index 00000000..7a12978b
--- /dev/null
+++ b/src/composables/__tests__/useDynamicHeaderTab.spec.ts
@@ -0,0 +1,67 @@
+import { useDynamicHeaderTab } from '@/composables/useDynamicHeaderTab'
+import { mount } from '@vue/test-utils'
+import { createMemoryHistory, createRouter } from 'vue-router'
+import { defineComponent, onMounted, provide, ref } from 'vue'
+import { describe, expect, it, vi } from 'vitest'
+
+describe('useDynamicHeaderTab', () => {
+  it('registers before mount and restores within the keep-alive activation flush', async () => {
+    const register = vi.fn()
+    const unregister = vi.fn()
+    const mountedRegistrationCount = vi.fn()
+    const router = createRouter({
+      history: createMemoryHistory(),
+      routes: [{ path: '/recommend', component: { template: '<div />' } }],
+    })
+    await router.push('/recommend')
+    await router.isReady()
+
+    const Page = defineComponent({
+      setup() {
+        const activeTab = ref('movie')
+        const { registerHeaderTab } = useDynamicHeaderTab()
+        registerHeaderTab({
+          enableStateRestore: false,
+          items: [{ tab: 'movie', title: '电影' }],
+          modelValue: activeTab,
+        })
+        onMounted(() => mountedRegistrationCount(register.mock.calls.length))
+
+        return {}
+      },
+      template: '<div>推荐页</div>',
+    })
+    const Host = defineComponent({
+      components: { Page },
+      setup() {
+        const active = ref(true)
+        provide('registerDynamicHeaderTab', register)
+        provide('unregisterDynamicHeaderTab', unregister)
+
+        return { active }
+      },
+      template: `
+        <button type="button" @click="active = !active">切换</button>
+        <KeepAlive><Page v-if="active" /></KeepAlive>
+      `,
+    })
+    const wrapper = mount(Host, {
+      global: {
+        plugins: [router],
+      },
+    })
+
+    expect(mountedRegistrationCount).toHaveBeenCalledWith(expect.any(Number))
+    expect(mountedRegistrationCount.mock.calls[0][0]).toBeGreaterThan(0)
+    expect(register.mock.calls.at(-1)?.[0].routePath).toBe('/recommend')
+
+    await wrapper.get('button').trigger('click')
+    expect(unregister).toHaveBeenCalledWith('/recommend')
+
+    const registrationsBeforeActivation = register.mock.calls.length
+    await wrapper.get('button').trigger('click')
+    expect(register.mock.calls.length).toBeGreaterThan(registrationsBeforeActivation)
+
+    wrapper.unmount()
+  })
+})
diff --git a/src/composables/__tests__/useGlassOpticalRenderer.spec.ts b/src/composables/__tests__/useGlassOpticalRenderer.spec.ts
index 75cec0fb..be2cac90 100644
--- a/src/composables/__tests__/useGlassOpticalRenderer.spec.ts
+++ b/src/composables/__tests__/useGlassOpticalRenderer.spec.ts
@@ -1,6 +1,7 @@
 import {
   collectGlassOpticalRects,
   containsGlassOpticalSurface,
+  resolveGlassOpticalSurfaceMode,
   setGlassRendererState,
   useGlassOpticalInteractionSource,
   useGlassOpticalRenderer,
@@ -45,11 +46,29 @@ vi.mock('three', async importOriginal => {
 
 /** 提供 renderer 单元测试所需的最小 ResizeObserver 实现。 */
 class ResizeObserverMock {
-  /** 断开观察时无需执行额外逻辑。 */
-  disconnect() {}
+  static instances: ResizeObserverMock[] = []
 
-  /** 测试不需要追踪具体被观察元素。 */
-  observe() {}
+  readonly targets = new Set<Element>()
+
+  constructor(private readonly callback: ResizeObserverCallback) {
+    ResizeObserverMock.instances.push(this)
+  }
+
+  /** 断开观察时无需执行额外逻辑。 */
+  disconnect() {
+    this.targets.clear()
+  }
+
+  /** 记录观察目标，供尺寸生命周期用例触发回调。 */
+  observe(target: Element) {
+    this.targets.add(target)
+  }
+
+  /** 模拟观察目标的内容框发生变化。 */
+  trigger() {
+    const entries = [...this.targets].map(target => ({ target }) as ResizeObserverEntry)
+    this.callback(entries, this as unknown as ResizeObserver)
+  }
 }
 
 /** 创建带稳定视口边界的光学表面元素。 */
@@ -124,6 +143,7 @@ function dispatchTouchEvent(
 }
 
 beforeEach(() => {
+  ResizeObserverMock.instances = []
   vi.stubGlobal('ResizeObserver', ResizeObserverMock)
   vi.stubGlobal('WebGLRenderingContext', class {})
   vi.spyOn(HTMLCanvasElement.prototype, 'getContext').mockReturnValue(null)
@@ -288,6 +308,19 @@ describe('glass optical surface discovery', () => {
     ])
   })
 
+  it('inherits the optical mode from a container and permits an explicit child override', () => {
+    const container = document.createElement('div')
+    container.dataset.glassOpticalMode = 'static-material'
+    const inherited = document.createElement('section')
+    const overridden = document.createElement('section')
+    overridden.dataset.glassOpticalMode = 'dynamic'
+    container.append(inherited, overridden)
+    document.body.append(container)
+
+    expect(resolveGlassOpticalSurfaceMode(inherited)).toBe('static-material')
+    expect(resolveGlassOpticalSurfaceMode(overridden)).toBe('dynamic')
+  })
+
   it('discovers the shared interactive card contract used across routes', () => {
     const surface = appendOpticalSurface('app-hover-lift-card', { height: 220, width: 150, x: 24, y: 96 })
     surface.style.borderTopLeftRadius = '20px'
@@ -389,6 +422,7 @@ describe('glass optical surface discovery', () => {
     expect(countListenerAdds(addCanvasListener.mock.calls, 'webglcontextrestored')).toBe(1)
 
     const renderTargetDisposalsBeforeFirstRelease = renderTargetDispose.mock.calls.length
+    const frameCancellationsBeforeFirstRelease = cancelFrame.mock.calls.length
     active.value = false
     await nextTick()
 
@@ -397,7 +431,7 @@ describe('glass optical surface discovery', () => {
     expect(contextLoss).toHaveBeenCalledTimes(1)
     expect(resizeDisconnect).toHaveBeenCalledTimes(1)
     expect(mutationDisconnect).toHaveBeenCalledTimes(1)
-    expect(cancelFrame).toHaveBeenCalledTimes(2)
+    expect(cancelFrame.mock.calls.length).toBeGreaterThan(frameCancellationsBeforeFirstRelease)
 
     addWindowListener.mockClear()
     addDocumentListener.mockClear()
@@ -421,6 +455,7 @@ describe('glass optical surface discovery', () => {
     expect(countListenerAdds(addCanvasListener.mock.calls, 'webglcontextrestored')).toBe(1)
 
     const renderTargetDisposalsBeforeSecondRelease = renderTargetDispose.mock.calls.length
+    const frameCancellationsBeforeSecondRelease = cancelFrame.mock.calls.length
     active.value = false
     await nextTick()
 
@@ -429,7 +464,7 @@ describe('glass optical surface discovery', () => {
     expect(contextLoss).toHaveBeenCalledTimes(2)
     expect(resizeDisconnect).toHaveBeenCalledTimes(2)
     expect(mutationDisconnect).toHaveBeenCalledTimes(2)
-    expect(cancelFrame).toHaveBeenCalledTimes(4)
+    expect(cancelFrame.mock.calls.length).toBeGreaterThan(frameCancellationsBeforeSecondRelease)
 
     scope.stop()
   })
@@ -639,6 +674,7 @@ describe('glass optical surface discovery', () => {
     const scene = render.mock.calls.at(-1)?.[0] as unknown as {
       children: Array<{
         material: {
+          fragmentShader: string
           uniforms: {
             uPreviousTexture: { value: unknown }
             uTexture: { value: unknown }
@@ -651,6 +687,132 @@ describe('glass optical surface discovery', () => {
     expect(uniforms.uPreviousTexture.value).not.toBe(uniforms.uTexture.value)
     expect(uniforms.uTextureMix.value).toBeGreaterThanOrEqual(0)
     expect(uniforms.uTextureMix.value).toBeLessThan(1)
+    expect(scene.children[0].material.fragmentShader).toContain(
+      'mix(toneMapWallpaper(previous, viewportUv), toneMapWallpaper(current, viewportUv), uTextureMix)',
+    )
+    expect(scene.children[0].material.fragmentShader).not.toContain(
+      'toneMapWallpaper(mix(previous, current, uTextureMix), viewportUv)',
+    )
+    scope.stop()
+  })
+
+  it('reallocates a changed buffer once and renders its stable surface in the same frame', async () => {
+    const three = await import('three')
+    let viewportWidth = 1200
+    vi.spyOn(window, 'innerWidth', 'get').mockImplementation(() => viewportWidth)
+    vi.spyOn(window, 'innerHeight', 'get').mockReturnValue(900)
+    appendOpticalSurface('app-hover-lift-card', { height: 220, width: 320, x: 40, y: 80 })
+    const setSize = vi.spyOn(three.WebGLRenderer.prototype, 'setSize')
+    const render = vi.spyOn(three.WebGLRenderer.prototype, 'render')
+    const scope = effectScope()
+    const renderer = scope.run(() =>
+      useGlassOpticalRenderer({
+        active: ref(true),
+        appearance: ref('clear'),
+        canvas: ref(document.createElement('canvas')),
+        quality: ref('balanced'),
+        routeKey: ref('/dashboard'),
+        tintColor: ref('#8D51F9'),
+        wallpaperUrl: ref('https://example.com/wallpaper.jpg'),
+      }),
+    )
+
+    await vi.waitFor(() => expect(renderer?.state.value).toBe('ready'))
+    setSize.mockClear()
+    render.mockClear()
+
+    viewportWidth = 960
+    window.dispatchEvent(new Event('resize'))
+
+    expect(setSize).toHaveBeenCalledOnce()
+    expect(render).toHaveBeenCalled()
+
+    setSize.mockClear()
+    window.dispatchEvent(new Event('resize'))
+
+    expect(setSize).not.toHaveBeenCalled()
+    scope.stop()
+  })
+
+  it('resizes a scroll buffer when an asynchronous page grows without optical surfaces', async () => {
+    const three = await import('three')
+    vi.spyOn(window, 'innerWidth', 'get').mockReturnValue(390)
+    vi.spyOn(window, 'innerHeight', 'get').mockReturnValue(844)
+    let presentationHeight = 844
+    const root = document.createElement('div')
+    const canvas = document.createElement('canvas')
+    Object.defineProperty(root, 'scrollHeight', {
+      configurable: true,
+      get: () => presentationHeight,
+    })
+    root.append(canvas)
+    document.body.append(root)
+    const setSize = vi.spyOn(three.WebGLRenderer.prototype, 'setSize')
+    const render = vi.spyOn(three.WebGLRenderer.prototype, 'render')
+    const scope = effectScope()
+    const renderer = scope.run(() =>
+      useGlassOpticalRenderer({
+        active: ref(true),
+        appearance: ref('clear'),
+        canvas: ref(canvas),
+        quality: ref('balanced'),
+        routeKey: ref('/history'),
+        surfaceSpace: 'scroll',
+        tintColor: ref('#8D51F9'),
+        wallpaperUrl: ref('https://example.com/wallpaper.jpg'),
+      }),
+    )
+
+    await vi.waitFor(() => expect(renderer?.state.value).toBe('ready'))
+    const observer = ResizeObserverMock.instances.find(instance => instance.targets.has(root))
+    expect(observer).toBeDefined()
+    setSize.mockClear()
+    render.mockClear()
+
+    presentationHeight = 5000
+    observer?.trigger()
+
+    expect(setSize).toHaveBeenCalledWith(390, 3072, false)
+    expect(render).toHaveBeenCalled()
+    scope.stop()
+  })
+
+  it('writes static-material surfaces into the shader without dynamic optical energy', async () => {
+    const three = await import('three')
+    const surface = appendOpticalSurface('app-hover-lift-card', { height: 220, width: 320, x: 40, y: 80 })
+    surface.dataset.glassOpticalMode = 'static-material'
+    const render = vi.spyOn(three.WebGLRenderer.prototype, 'render')
+    const scope = effectScope()
+    const renderer = scope.run(() =>
+      useGlassOpticalRenderer({
+        active: ref(true),
+        appearance: ref('clear'),
+        canvas: ref(document.createElement('canvas')),
+        quality: ref('balanced'),
+        routeKey: ref('/plugins'),
+        surfaceSpace: 'scroll',
+        tintColor: ref('#8D51F9'),
+        wallpaperUrl: ref('https://example.com/wallpaper.jpg'),
+      }),
+    )
+
+    await vi.waitFor(() => expect(renderer?.state.value).toBe('ready'))
+    await vi.waitFor(() => expect(render).toHaveBeenCalled())
+    const scene = render.mock.calls.at(-1)?.[0] as unknown as {
+      children: Array<{
+        material: {
+          fragmentShader: string
+          uniforms: {
+            uSurfaceDynamics: { value: number[] }
+          }
+        }
+      }>
+    }
+    const material = scene.children[0].material
+
+    expect(material.uniforms.uSurfaceDynamics.value[0]).toBe(0)
+    expect(material.fragmentShader).toContain('uniform float uSurfaceDynamics[8]')
+    expect(material.fragmentShader).toContain('float surfaceDynamic = uSurfaceDynamics[i]')
     scope.stop()
   })
 
@@ -1376,7 +1538,7 @@ describe('glass optical surface discovery', () => {
 
     expect(scene.children[0].material.fragmentShader).not.toContain('clamp(uMotion +')
     expect(scene.children[0].material.fragmentShader).toContain(
-      'materialEnergy = max(materialEnergy, liquidEnergy * rectMask)',
+      'materialEnergy = max(materialEnergy, liquidEnergy * rectMask * surfaceDynamic)',
     )
     expect(scene.children[0].material.fragmentShader).toContain('softLimitDynamicRefraction')
     expect(scene.children[0].material.fragmentShader).toContain('getContentProtection')
@@ -1384,7 +1546,7 @@ describe('glass optical surface discovery', () => {
     expect(scene.children[0].material.fragmentShader).toContain('singleSpecular')
     expect(scene.children[0].material.fragmentShader).not.toContain('stableSample')
     expect(scene.children[0].material.fragmentShader).not.toContain('broadReflection')
-    expect(scene.children[0].material.fragmentShader).toContain('flowSurfaceDetail * 0.38')
+    expect(scene.children[0].material.fragmentShader).toContain('flowSurfaceDetail * dynamicMask * 0.38')
     expect(scene.children[0].material.fragmentShader).not.toContain('pointerCurvature')
     expect(scene.children[0].material.fragmentShader).not.toContain('wakeCurvature')
     expect(scene.children[0].material.fragmentShader).not.toContain('surfaceCurvature')
diff --git a/src/composables/useDynamicHeaderTab.ts b/src/composables/useDynamicHeaderTab.ts
index 11a3f66d..d04bee30 100644
--- a/src/composables/useDynamicHeaderTab.ts
+++ b/src/composables/useDynamicHeaderTab.ts
@@ -39,7 +39,7 @@ export function useDynamicHeaderTab() {
 
   // 尝试从inject获取
   const registerDynamicHeaderTab = inject<(tab: DynamicHeaderTabConfig) => void>('registerDynamicHeaderTab')
-  const unregisterDynamicHeaderTab = inject<() => void>('unregisterDynamicHeaderTab')
+  const unregisterDynamicHeaderTab = inject<(routePath?: string) => void>('unregisterDynamicHeaderTab')
 
   /** 注册当前页面的动态头部标签配置。 */
   const registerHeaderTab = (config: {
@@ -153,12 +153,12 @@ export function useDynamicHeaderTab() {
     // 取消注册函数
     const doUnregister = () => {
       if (unregisterDynamicHeaderTab) {
-        unregisterDynamicHeaderTab()
+        unregisterDynamicHeaderTab(tabConfig.routePath)
       }
     }
 
-    // 初始注册（延迟到下个tick，确保路由已经完全切换）
-    nextTick(() => {
+    // 页签高度必须在页面首帧布局前确定，避免内容先渲染后再整体下移。
+    onBeforeMount(() => {
       doRegister()
     })
 
@@ -166,15 +166,13 @@ export function useDynamicHeaderTab() {
     onActivated(() => {
       // 页面激活时，优先使用当前页面的实际状态，而不是恢复的PWA状态
       // 这样可以避免从后台切换回来时显示错误的标签页
-      nextTick(() => {
-        // 确保使用当前页面的实际modelValue，不受PWA状态恢复影响
-        tabConfig.modelValue = config.modelValue.value
-        // 同步当前状态到PWA存储，确保状态一致性
-        if (pwaTabState && config.modelValue.value) {
-          pwaTabState.activeTab.value = config.modelValue.value
-        }
-        doRegister()
-      })
+      // 确保使用当前页面的实际modelValue，不受PWA状态恢复影响
+      tabConfig.modelValue = config.modelValue.value
+      // 同步当前状态到PWA存储，确保状态一致性
+      if (pwaTabState && config.modelValue.value) {
+        pwaTabState.activeTab.value = config.modelValue.value
+      }
+      doRegister()
     })
 
     // 处理页面失活时取消注册（支持keep-alive缓存的页面）
diff --git a/src/composables/useGlassOpticalRenderer.ts b/src/composables/useGlassOpticalRenderer.ts
index 2a4e8408..d3c4310f 100644
--- a/src/composables/useGlassOpticalRenderer.ts
+++ b/src/composables/useGlassOpticalRenderer.ts
@@ -43,6 +43,7 @@ import {
   type GlassOpticalQuality,
   type GlassOpticalRect,
   type GlassOpticalSurfaceCandidate,
+  type GlassOpticalSurfaceMode,
   type GlassOpticalSurfaceSlot,
 } from '@/utils/glassOptics'
 import type { ThemeCustomizerGlassAppearance } from '@/composables/useThemeCustomizer'
@@ -166,6 +167,7 @@ interface GlassRendererUniforms extends Record<string, IUniform> {
   uRectCount: IUniform<number>
   uRects: IUniform<Vector4[]>
   uSurfaceWeights: IUniform<number[]>
+  uSurfaceDynamics: IUniform<number[]>
   uPreviousTexture: IUniform<Texture | null>
   uTexture: IUniform<Texture | null>
   uTextureMix: IUniform<number>
@@ -237,7 +239,9 @@ interface UseGlassOpticalRendererOptions {
   wallpaperUrl: MaybeRefOrGetter<string>
 }
 
-type GlassOpticalSurfaceDescriptor = GlassOpticalSurfaceCandidate<HTMLElement>
+type GlassOpticalSurfaceDescriptor = GlassOpticalSurfaceCandidate<HTMLElement> & {
+  mode: GlassOpticalSurfaceMode
+}
 
 interface PreparedWallpaperTexture {
   /** 是否包含可采样的真实壁纸，而非程序化回退纹理。 */
@@ -367,6 +371,7 @@ uniform float uReflectionStrength;
 uniform vec4 uRects[8];
 uniform vec4 uRadii[8];
 uniform float uSurfaceWeights[8];
+uniform float uSurfaceDynamics[8];
 uniform int uRectCount;
 uniform float uAppearance;
 uniform vec3 uTintColor;
@@ -468,7 +473,10 @@ vec3 sampleWallpaper(vec2 uv) {
   vec3 previous = texture2D(uPreviousTexture, previousUv).rgb;
   vec3 current = texture2D(uTexture, uv).rgb;
 
-  return toneMapWallpaper(mix(previous, current, uTextureMix), viewportUv);
+  if (uTextureMix <= 0.001) return toneMapWallpaper(previous, viewportUv);
+  if (uTextureMix >= 0.999) return toneMapWallpaper(current, viewportUv);
+
+  return mix(toneMapWallpaper(previous, viewportUv), toneMapWallpaper(current, viewportUv), uTextureMix);
 }
 
 vec3 sampleChromatic(vec2 uv, float separation) {
@@ -541,6 +549,7 @@ void main() {
   float topPrism = 0.0;
   float backlightAbsorption = 0.0;
   float materialEnergy = 0.0;
+  float dynamicMask = 0.0;
   vec2 staticRefraction = vec2(0.0);
   vec2 dynamicRefraction = vec2(0.0);
   vec2 wakeDirection = length(uWakeDirection) > 0.0001 ? normalize(uWakeDirection) : vec2(0.0, -1.0);
@@ -598,6 +607,7 @@ void main() {
     if (i >= uRectCount) break;
 
     vec4 rect = uRects[i];
+    float surfaceDynamic = uSurfaceDynamics[i];
     vec2 local = (vUv - rect.xy) / rect.zw;
     float rectMask = roundedRectMask(local, rect.zw * uPresentationSize, uRadii[i]) * uSurfaceWeights[i];
     if (rectMask <= 0.0) continue;
@@ -666,8 +676,8 @@ void main() {
       )) *
       uMotion *
       mix(1.0, 1.24, uMotionExpansion);
-    float localCaustic = singleSpecular * rectMask;
-    staticRefraction += lens * staticLens * mix(1.0, 0.72, frosted) * rectMask;
+    float localCaustic = singleSpecular * rectMask * surfaceDynamic;
+    staticRefraction += lens * staticLens * mix(1.0, 0.72, frosted) * rectMask * surfaceDynamic;
     vec2 sampleTranslation =
       uPointerVelocity *
       mix(0.055, 0.075, uQuality) *
@@ -679,13 +689,14 @@ void main() {
       trailRefraction * trailStrength +
       temporalFlow * temporalStrength +
       wakeRefraction
-    ) * rectMask;
-    edge = max(edge, edgeResponse * rectMask);
+    ) * rectMask * surfaceDynamic;
+    edge = max(edge, edgeResponse * rectMask * surfaceDynamic);
     caustic = max(caustic, localCaustic);
     directionalReflection = max(directionalReflection, localDirectionalReflection);
     topPrism = max(topPrism, localTopPrism);
     backlightAbsorption = max(backlightAbsorption, localBacklightAbsorption);
-    materialEnergy = max(materialEnergy, liquidEnergy * rectMask);
+    materialEnergy = max(materialEnergy, liquidEnergy * rectMask * surfaceDynamic);
+    dynamicMask = max(dynamicMask, rectMask * surfaceDynamic);
     mask = max(mask, rectMask);
   }
 
@@ -707,7 +718,7 @@ void main() {
     (
       0.82 +
       materialEnergy * mix(0.28, 0.76, uMotionExpansion) +
-      flowSurfaceDetail * 0.38
+      flowSurfaceDetail * dynamicMask * 0.38
     );
   vec3 diffused;
   if (uQuality > 0.5) {
@@ -844,6 +855,13 @@ function isVisibleSurface(element: HTMLElement, bounds: DOMRect) {
   )
 }
 
+/** 从最近的组件边界读取模式；未声明的现有表面保持完整动态行为。 */
+export function resolveGlassOpticalSurfaceMode(element: HTMLElement): GlassOpticalSurfaceMode {
+  const value = element.closest<HTMLElement>('[data-glass-optical-mode]')?.dataset.glassOpticalMode
+
+  return value === 'static-material' ? 'static-material' : 'dynamic'
+}
+
 /** 读取全部可见视觉表面，并保留 DOM 元素作为 renderer 生命周期内的稳定身份。 */
 function collectGlassOpticalSurfaceDescriptors(
   viewportWidth: number,
@@ -879,6 +897,7 @@ function collectGlassOpticalSurfaceDescriptors(
 
       candidates.push({
         key: element,
+        mode: resolveGlassOpticalSurfaceMode(element),
         rect: {
           height: bounds.height,
           radii: [...readBorderRadii(element)] as GlassCornerRadii,
@@ -899,12 +918,13 @@ function collectGlassOpticalSurfaceDescriptors(
     const { rect } = candidate
     const nested = selected.some(
       parent =>
+        parent.mode === candidate.mode &&
         rect.x >= parent.rect.x &&
         rect.y >= parent.rect.y &&
         rect.x + rect.width <= parent.rect.x + parent.rect.width &&
         rect.y + rect.height <= parent.rect.y + parent.rect.height,
     )
-    if (!nested) selected.push({ key: candidate.key, rect })
+    if (!nested) selected.push({ key: candidate.key, mode: candidate.mode, rect })
   }
 
   return selected
@@ -979,7 +999,6 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
   let activeTouchIdentifier: number | null = null
   let pendingFlowInjection = 0
   let interactionAnimating = false
-  let surfaceResizeTimer: number | null = null
   let scrollAnimationFrame: number | null = null
   let scrollDirty = false
   let scrollSurfaceRefreshPending = false
@@ -1030,6 +1049,16 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
     return { x: clientX + window.scrollX, y: clientY + window.scrollY }
   }
 
+  /** scroll 呈现层必须跟随页面异步撑高，即使页面内没有可发现的光学表面。 */
+  function observeResizeTargets(reset = true) {
+    if (reset) resizeObserver?.disconnect()
+    if (presentationSpace === 'scroll') {
+      const presentationRoot = options.canvas.value?.parentElement
+      if (presentationRoot) resizeObserver?.observe(presentationRoot)
+    }
+    for (const element of observedSurfaces) resizeObserver?.observe(element)
+  }
+
   function cancelScheduledFrame() {
     if (animationFrame === null) return
 
@@ -1237,6 +1266,7 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
     const uniformRects = resources.uniforms.uRects.value
     const uniformRadii = resources.uniforms.uRadii.value
     const uniformWeights = resources.uniforms.uSurfaceWeights.value
+    const uniformDynamics = resources.uniforms.uSurfaceDynamics.value
     const transitionWeights = outgoingSurface
       ? getGlassOpticalSurfaceTransitionWeights(timestamp - surfaceTransitionStartedAt, SURFACE_TRANSITION_DURATION_MS)
       : { incoming: 1, outgoing: 0 }
@@ -1256,6 +1286,7 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
             : slot
               ? 1
               : 0
+      uniformDynamics[index] = slot?.mode === 'static-material' ? 0 : 1
     }
 
     resources.uniforms.uRectCount.value = normalized.length
@@ -1296,9 +1327,8 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
       nextObservedSurfaces.some((element, index) => element !== observedSurfaces[index])
 
     if (observedSurfacesChanged) {
-      resizeObserver?.disconnect()
       observedSurfaces = nextObservedSurfaces
-      for (const element of observedSurfaces) resizeObserver?.observe(element)
+      observeResizeTargets()
     }
     if (scheduleRender) scheduleFrame()
   }
@@ -1349,14 +1379,19 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
     surfaceStabilityFrame = requestAnimationFrame(sample)
   }
 
-  function scheduleSurfaceResizeUpdate() {
-    if (surfaceResizeTimer !== null) window.clearTimeout(surfaceResizeTimer)
+  /** ResizeObserver 在浏览器绘制前提交新尺寸，避免 CSS 与 WebGL buffer 跨帧失配。 */
+  function handleSurfaceResize(entries: ResizeObserverEntry[]) {
+    if (!resources) return
 
-    surfaceResizeTimer = window.setTimeout(() => {
-      surfaceResizeTimer = null
-      if (presentationSpace === 'scroll') resizeRenderer()
-      else scheduleSurfaceUpdate()
-    }, 160)
+    const presentationRoot = presentationSpace === 'scroll' ? options.canvas.value?.parentElement : null
+    if (presentationRoot && entries.some(entry => entry.target === presentationRoot)) {
+      resizeRenderer()
+      return
+    }
+
+    const timestamp = performance.now()
+    updateSurfaceUniforms(timestamp, false)
+    renderFrame(timestamp, false)
   }
 
   /** CSS transform 不改变布局尺寸，过渡期间用有界帧同步真实几何并清除旧蒙版。 */
@@ -1488,9 +1523,13 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
             profile.bufferQuality,
             window.devicePixelRatio,
           )
+    const bufferChanged = presentationBufferWidth !== buffer.width || presentationBufferHeight !== buffer.height
+    const presentationChanged =
+      resources.uniforms.uPresentationSize.value.x !== presentation.width ||
+      resources.uniforms.uPresentationSize.value.y !== presentation.height
     presentationBufferHeight = buffer.height
     presentationBufferWidth = buffer.width
-    resources.renderer.setSize(buffer.width, buffer.height, false)
+    if (bufferChanged) resources.renderer.setSize(buffer.width, buffer.height, false)
     resources.uniforms.uVisibleViewportSize.value.set(viewportWidth, viewportHeight)
     resources.uniforms.uPresentationSize.value.set(presentation.width, presentation.height)
     resources.uniforms.uScrollOffset.value.set(
@@ -1500,13 +1539,20 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
     if (flowResources) {
       const flowWidth = Math.max(96, Math.round(buffer.width * FLOW_BUFFER_SCALE))
       const flowHeight = Math.max(96, Math.round(buffer.height * FLOW_BUFFER_SCALE))
-      flowResources.readTarget.setSize(flowWidth, flowHeight)
-      flowResources.writeTarget.setSize(flowWidth, flowHeight)
+      const flowBufferChanged =
+        flowResources.readTarget.width !== flowWidth || flowResources.readTarget.height !== flowHeight
+      if (flowBufferChanged) {
+        flowResources.readTarget.setSize(flowWidth, flowHeight)
+        flowResources.writeTarget.setSize(flowWidth, flowHeight)
+      }
       flowResources.uniforms.uTexelSize.value.set(1 / flowWidth, 1 / flowHeight)
       flowResources.uniforms.uViewportAspect.value = viewportWidth / Math.max(viewportHeight, 1)
     }
     syncCoverScale(viewportWidth, viewportHeight)
-    scheduleSurfaceUpdate()
+    updateSurfaceUniforms(performance.now(), false)
+    // buffer 重分配或归一化呈现尺寸变化都必须在当前绘制周期提交稳定画面。
+    if (bufferChanged || presentationChanged) renderFrame(performance.now(), false)
+    else scheduleSurfaceUpdate()
   }
 
   function profileRequiresTextureReload(
@@ -1749,7 +1795,7 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
     lastPointerX = clientX
     lastPointerY = clientY
     lastPointerAt = timestamp
-    if (!resources || !surface) return
+    if (!resources || !surface || surface.mode === 'static-material') return
 
     const reducedMotion = matchMedia('(prefers-reduced-motion: reduce)').matches
     const surfaceChanged = activateInteractionSurface(surface.key, timestamp, reducedMotion)
@@ -1833,7 +1879,7 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
     const point = getPresentationPoint(touch.clientX, touch.clientY)
     const presentation = getPresentationSize()
     const surface = findInteractionSurface(point.x, point.y)
-    if (resources && surface) {
+    if (resources && surface?.mode === 'dynamic') {
       activateInteractionSurface(surface.key, timestamp, matchMedia('(prefers-reduced-motion: reduce)').matches)
       snapPointer(point.x / Math.max(presentation.width, 1), 1 - point.y / Math.max(presentation.height, 1))
       scheduleFrame()
@@ -2018,14 +2064,20 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
   }
 
   function setupObservers() {
-    resizeObserver = new ResizeObserver(scheduleSurfaceResizeUpdate)
+    resizeObserver = new ResizeObserver(handleSurfaceResize)
+    observeResizeTargets(false)
     const observedMutationRoots = new Set<Node>()
 
     function observeMutationRoot(root: Node | null, subtree: boolean) {
       if (!root || observedMutationRoots.has(root)) return
 
       observedMutationRoots.add(root)
-      surfaceMutationObserver?.observe(root, { childList: true, subtree })
+      surfaceMutationObserver?.observe(root, {
+        attributeFilter: ['data-glass-optical-mode'],
+        attributes: true,
+        childList: true,
+        subtree,
+      })
     }
 
     surfaceMutationObserver = new MutationObserver(mutations => {
@@ -2104,10 +2156,6 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
       cancelAnimationFrame(surfaceStabilityFrame)
       surfaceStabilityFrame = null
     }
-    if (surfaceResizeTimer !== null) {
-      window.clearTimeout(surfaceResizeTimer)
-      surfaceResizeTimer = null
-    }
     removeEvents()
     resizeObserver?.disconnect()
     resizeObserver = null
@@ -2393,6 +2441,7 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
         uRectCount: { value: 0 },
         uRects: { value: Array.from({ length: 8 }, () => new Vector4Class()) },
         uSurfaceWeights: { value: Array.from({ length: 8 }, () => 0) },
+        uSurfaceDynamics: { value: Array.from({ length: 8 }, () => 1) },
         uPreviousTexture: { value: null },
         uTexture: { value: null },
         uTextureMix: { value: 1 },
@@ -2578,7 +2627,6 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
     () => toValue(options.routeKey),
     async (routeKey, previousRouteKey) => {
       const previousProfile = getRenderProfile(previousRouteKey ?? '')
-      await nextTick()
       if (resources) {
         const nextProfile = getRenderProfile(routeKey)
         resizeRenderer()
@@ -2590,6 +2638,7 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
       }
       scheduleSurfaceUpdate()
     },
+    { flush: 'post' },
   )
 
   onScopeDispose(() => {
diff --git a/src/layouts/default/components/DefaultLayout.vue b/src/layouts/default/components/DefaultLayout.vue
index f531d4f4..d8ed88de 100644
--- a/src/layouts/default/components/DefaultLayout.vue
+++ b/src/layouts/default/components/DefaultLayout.vue
@@ -156,8 +156,10 @@ const registerDynamicHeaderTab = (tab: DynamicHeaderTab) => {
   applyPendingHorizontalTab()
 }
 
-/** 取消当前页面注册的动态标签页。 */
-const unregisterDynamicHeaderTab = () => {
+/** 仅注销仍由指定路由持有的动态标签，避免相邻页面生命周期互相覆盖。 */
+const unregisterDynamicHeaderTab = (routePath?: string) => {
+  if (routePath && dynamicHeaderTab.value?.routePath !== routePath) return
+
   dynamicHeaderTab.value = null
 }
 
@@ -844,5 +846,4 @@ onMounted(async () => {
   align-items: center;
   margin-inline-start: auto;
 }
-
 </style>
diff --git a/src/pages/downloading.vue b/src/pages/downloading.vue
index ef1fefda..70b7f8b9 100644
--- a/src/pages/downloading.vue
+++ b/src/pages/downloading.vue
@@ -26,6 +26,10 @@ const downloaderItems = computed(() => {
 
 // 使用动态标签页
 const { registerHeaderTab } = useDynamicHeaderTab()
+registerHeaderTab({
+  items: downloaderItems,
+  modelValue: activeTab,
+})
 
 // 调用API查询下载器设置
 async function loadDownloaderSetting() {
@@ -38,24 +42,12 @@ async function loadDownloaderSetting() {
   }
 }
 
-// 注册动态标签页
-const registerTabs = () => {
-  if (downloaderItems.value.length > 0) {
-    registerHeaderTab({
-      items: downloaderItems,
-      modelValue: activeTab,
-    })
-  }
-}
-
 onMounted(async () => {
   await loadDownloaderSetting()
-  registerTabs()
 })
 
 useKeepAliveRefresh(async () => {
   await loadDownloaderSetting()
-  registerTabs()
 })
 </script>
 
diff --git a/src/pages/filemanager.vue b/src/pages/filemanager.vue
index 8f430aa3..a574b818 100644
--- a/src/pages/filemanager.vue
+++ b/src/pages/filemanager.vue
@@ -3,5 +3,7 @@ import FileBrowserView from '@/views/reorganize/FileBrowserView.vue'
 </script>
 
 <template>
-  <FileBrowserView />
+  <div data-glass-optical-mode="static-material">
+    <FileBrowserView />
+  </div>
 </template>
diff --git a/src/pages/history.vue b/src/pages/history.vue
index 9040928b..d33d419f 100644
--- a/src/pages/history.vue
+++ b/src/pages/history.vue
@@ -3,7 +3,7 @@ import TransferHistoryView from '@/views/reorganize/TransferHistoryView.vue'
 </script>
 
 <template>
-  <div>
+  <div data-glass-optical-mode="static-material">
     <TransferHistoryView />
   </div>
 </template>
diff --git a/src/pages/plugin-app.vue b/src/pages/plugin-app.vue
index 9de19477..f3e297b0 100644
--- a/src/pages/plugin-app.vue
+++ b/src/pages/plugin-app.vue
@@ -42,7 +42,7 @@ watch(
 </script>
 
 <template>
-  <div class="plugin-app-page">
+  <div class="plugin-app-page" data-glass-optical-mode="static-material">
     <VAlert v-if="loadError" type="error" class="ma-4" title="组件加载错误">
       无法加载插件全页组件。多入口时请暴露 AppPage 或 AppPage{Pascal}（见文档），并确认插件已启用。
     </VAlert>
diff --git a/src/utils/__tests__/backgroundRotation.spec.ts b/src/utils/__tests__/backgroundRotation.spec.ts
index c3e53ac8..10d41fa6 100644
--- a/src/utils/__tests__/backgroundRotation.spec.ts
+++ b/src/utils/__tests__/backgroundRotation.spec.ts
@@ -1,5 +1,6 @@
 import {
   BACKGROUND_ROTATION_GRACE_MS,
+  createBackgroundCandidateOrderResolver,
   findFirstAvailableBackground,
   preloadBackgroundRotationImages,
   shouldAllowBackgroundRotation,
@@ -27,6 +28,27 @@ describe('background rotation lifecycle', () => {
   })
 })
 
+describe('createBackgroundCandidateOrderResolver', () => {
+  it('shuffles a source list without mutating the backend response', () => {
+    const urls = ['one.jpg', 'two.jpg', 'three.jpg']
+    const resolveOrder = createBackgroundCandidateOrderResolver(() => 0)
+
+    expect(resolveOrder(urls)).toEqual(['two.jpg', 'three.jpg', 'one.jpg'])
+    expect(urls).toEqual(['one.jpg', 'two.jpg', 'three.jpg'])
+  })
+
+  it('keeps the same order across retries and reshuffles only after the source list changes', () => {
+    const random = vi.fn().mockReturnValueOnce(0).mockReturnValueOnce(0).mockReturnValueOnce(0.5)
+    const resolveOrder = createBackgroundCandidateOrderResolver(random)
+    const firstOrder = resolveOrder(['one.jpg', 'two.jpg', 'three.jpg'])
+
+    expect(resolveOrder(['one.jpg', 'two.jpg', 'three.jpg'])).toEqual(firstOrder)
+    expect(random).toHaveBeenCalledTimes(2)
+    expect(resolveOrder(['one.jpg', 'two.jpg'])).toEqual(['one.jpg', 'two.jpg'])
+    expect(random).toHaveBeenCalledTimes(3)
+  })
+})
+
 describe('preloadBackgroundRotationImages', () => {
   it('does not let an unused optical texture block the visible wallpaper', async () => {
     const preload = vi.fn(async (url: string) => url === 'display.jpg')
diff --git a/src/utils/backgroundRotation.ts b/src/utils/backgroundRotation.ts
index ba16f9ca..2ea71a09 100644
--- a/src/utils/backgroundRotation.ts
+++ b/src/utils/backgroundRotation.ts
@@ -3,11 +3,36 @@ import type { AppActivityState } from '@/utils/appActivityLifecycle'
 /** 壁纸在窗口失焦后继续轮换的最长时间，交互 renderer 仍由应用生命周期独立暂停。 */
 export const BACKGROUND_ROTATION_GRACE_MS = 60_000
 
+type RandomSource = () => number
+
 /** 壁纸轮换只在前台活动或失焦宽限期内运行，系统减少动态效果时始终停止。 */
 export function shouldAllowBackgroundRotation(state: AppActivityState, graceActive: boolean, reducedMotion: boolean) {
   return !reducedMotion && (state === 'active' || graceActive)
 }
 
+/**
+ * 为每个前端页面生命周期生成稳定的随机候选顺序；相同来源列表在重试和状态恢复时不会再次洗牌。
+ */
+export function createBackgroundCandidateOrderResolver(random: RandomSource = Math.random) {
+  let sourceUrls: string[] | null = null
+  let orderedUrls: string[] = []
+
+  return (urls: string[]) => {
+    const sourceChanged =
+      !sourceUrls || sourceUrls.length !== urls.length || sourceUrls.some((url, index) => url !== urls[index])
+    if (!sourceChanged) return [...orderedUrls]
+
+    sourceUrls = [...urls]
+    orderedUrls = [...urls]
+    for (let index = orderedUrls.length - 1; index > 0; index -= 1) {
+      const swapIndex = Math.floor(random() * (index + 1))
+      ;[orderedUrls[index], orderedUrls[swapIndex]] = [orderedUrls[swapIndex], orderedUrls[index]]
+    }
+
+    return [...orderedUrls]
+  }
+}
+
 interface BackgroundRotationImagePreloadOptions {
   /** 外层背景实际显示的壁纸地址。 */
   displayUrl: string
@@ -18,7 +43,7 @@ interface BackgroundRotationImagePreloadOptions {
 }
 
 interface FirstAvailableBackgroundOptions {
-  /** 保持后端返回顺序的候选壁纸。 */
+  /** 当前页面生命周期已确定顺序的候选壁纸。 */
   urls: string[]
   /** 当前加载批次仍可提交时返回 true。 */
   canContinue: () => boolean
@@ -26,7 +51,7 @@ interface FirstAvailableBackgroundOptions {
   preload: (url: string) => Promise<boolean>
 }
 
-/** 按来源顺序寻找首张可用壁纸，单项失败或过期批次不会提交可见状态。 */
+/** 按当前候选顺序寻找首张可用壁纸，单项失败或过期批次不会提交可见状态。 */
 export async function findFirstAvailableBackground(options: FirstAvailableBackgroundOptions) {
   for (let index = 0; index < options.urls.length; index += 1) {
     if (!options.canContinue()) return null
diff --git a/src/utils/glassOptics.ts b/src/utils/glassOptics.ts
index a5c64d65..a926be64 100644
--- a/src/utils/glassOptics.ts
+++ b/src/utils/glassOptics.ts
@@ -72,9 +72,14 @@ export interface GlassOpticalSpringState {
   velocity: number
 }
 
+/** 光学表面在共享 renderer 中采用的动态响应合同。 */
+export type GlassOpticalSurfaceMode = 'dynamic' | 'static-material'
+
 export interface GlassOpticalSurfaceCandidate<TKey> {
   /** renderer 生命周期内稳定的表面身份。 */
   key: TKey
+  /** 表面使用完整动态光学，或只保留稳定材质能量。 */
+  mode?: GlassOpticalSurfaceMode
   /** 表面的当前视口几何。 */
   rect: GlassOpticalRect
 }