diff --git a/README.md b/README.md
index 52ee9cd..06de6d1 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,12 @@
 
 短剧 Agent 的前端工作台。支持剧本创作、拆解、视觉风格、角色选角、主体形态、分镜设计、镜头首帧与视频生产，使用真实后端 API，不包含演示数据或浏览器端模型调用。
 
-## 最新同步（2026-09-03）
+## 最新同步（2026-09-04）
 
 - 对齐后端 `dev@05bb9e8b7e0a0e85303b16eb3a2ac634e01dd7eb`：图片／视频模型由后端统一配置，前端不再发送固定 Provider。
 - 新增首帧视觉校验、有限自动修复、当前集小批量质量生成、视频抽样帧质量检查、视频修复候选与复检晋升、只读模型能力查询。默认不调用模型，付费操作需确认，结果可定位和导出。
 - 保留主要布局和业务能力，导出／执行记录／提示词等次要入口收进菜单，长介绍和高级规则按需展开；关键错误、过期、未保存与费用提示继续直显。
+- 全部业务抽屉统一挂载到 `body`，侧栏及遮罩覆盖完整视口，不受 `main/content` 裁切；保持原有宽度、正文内部滚动和关闭后配置草稿。
 
 入口和边界见 [前端简化与质量功能同步](docs/frontend-simplification.md)，接口覆盖见 [后端功能覆盖说明](docs/backend-coverage.md)。
 
diff --git a/src/components/ui/WorkspacePage.vue b/src/components/ui/WorkspacePage.vue
index 192dd6f..7f2be9f 100644
--- a/src/components/ui/WorkspacePage.vue
+++ b/src/components/ui/WorkspacePage.vue
@@ -1,14 +1,10 @@
 <script setup lang="ts">
 import { NScrollbar } from 'naive-ui'
-import { provide, ref } from 'vue'
-import { workspaceHostKey } from './workspaceContext'
 /** 工作区固定标题和操作区；仅内容容器滚动，不向 document 传播滚动。 */
 defineProps<{ split?: boolean; compact?: boolean }>()
-const host = ref<HTMLElement | null>(null)
-provide(workspaceHostKey, host)
 </script>
 <template>
-    <section ref="host" class="workspace-page" :class="{ 'content-first-workspace': compact }">
+    <section class="workspace-page" :class="{ 'content-first-workspace': compact }">
         <NScrollbar v-if="$slots.header" class="workspace-heading-scroll"
             ><header class="workspace-heading"><slot name="header" /></header
         ></NScrollbar>
diff --git a/src/components/ui/WorkspaceTools.vue b/src/components/ui/WorkspaceTools.vue
index 33988dc..8456664 100644
--- a/src/components/ui/WorkspaceTools.vue
+++ b/src/components/ui/WorkspaceTools.vue
@@ -1,13 +1,10 @@
 <script setup lang="ts">
-import { inject } from 'vue'
 import { NButton, NDrawer, NDrawerContent } from 'naive-ui'
 import { Settings2, X } from '@lucide/vue'
-import { workspaceHostKey } from './workspaceContext'
 
-/** 低频配置、批量动作与回执在抽屉中查看，开关面板不影响页面查询和后台任务。 */
+/** 所有业务抽屉挂到 body，以完整视口为边界；开关面板不影响草稿、页面查询和后台任务。 */
 withDefaults(defineProps<{ title: string; label?: string; hasReceipt?: boolean }>(), { label: '操作与回执' })
 const open = defineModel<boolean>('open', { default: false })
-const host = inject(workspaceHostKey, undefined)
 </script>
 
 <template>
@@ -23,10 +20,10 @@ const host = inject(workspaceHostKey, undefined)
     </NButton>
     <NDrawer
         v-model:show="open"
-        :to="host ?? undefined"
+        to="body"
         width="min(960px, 100%)"
         placement="right"
-        :block-scroll="false"
+        :block-scroll="true"
         display-directive="show"
         class="workspace-tools-drawer"
         :aria-label="title"
diff --git a/src/components/ui/layout.test.ts b/src/components/ui/layout.test.ts
index 2c80d88..5f04da1 100644
--- a/src/components/ui/layout.test.ts
+++ b/src/components/ui/layout.test.ts
@@ -12,6 +12,7 @@ import ConfirmAction from '../../features/workflows/ConfirmAction.vue'
 import ThemeToggle from './ThemeToggle.vue'
 import { projectsApi } from '../../features/projects/api'
 import { readFileSync } from 'node:fs'
+import { drawerPanel } from '../../testing/naive'
 
 let wrapper: VueWrapper | undefined
 afterEach(() => {
@@ -188,7 +189,7 @@ describe('管理后台组件边界', () => {
         expect(document.querySelector('.dialog-body-scroll .n-scrollbar-container')).not.toBeNull()
     })
 
-    it('常用工具固定在列表外，批量抽屉挂载于工作区，开关保留列表与配置草稿', async () => {
+    it('抽屉挂载 body 覆盖完整视口，开关保留列表与配置草稿', async () => {
         wrapper = mount(WorkspacePage, {
             attachTo: document.body,
             props: { split: true, compact: true },
@@ -202,18 +203,36 @@ describe('管理后台组件边界', () => {
         expect(wrapper.get('.workspace-heading').find('[data-workspace-tools]').exists()).toBe(true)
         await wrapper.get('[data-workspace-tools]').trigger('click')
         await flushPromises()
-        expect(wrapper.getComponent(NDrawer).props('to')).toBe(wrapper.get('.workspace-page').element)
+        expect(wrapper.getComponent(NDrawer).props()).toMatchObject({
+            to: 'body',
+            blockScroll: true,
+            placement: 'right',
+            width: 'min(960px, 100%)',
+            trapFocus: true,
+            closeOnEsc: true
+        })
         expect(wrapper.getComponent(NDrawerContent).props('nativeScrollbar')).toBe(false)
-        expect(wrapper.get('.workspace-tools-drawer').element.closest('.workspace-split')).toBeNull()
-        expect(wrapper.find('.workspace-tools-drawer .n-scrollbar-container').exists()).toBe(true)
-        await wrapper.get('input[aria-label="配置草稿"]').setValue('保留配置')
-        await wrapper.get('[aria-label="关闭操作面板"]').trigger('click')
+        expect(wrapper.find('.workspace-tools-drawer').exists()).toBe(false)
+        const container = drawerPanel().element.closest('.n-drawer-container')!
+        expect(container.parentElement).toBe(document.body)
+        expect(container.closest('main, .admin-content, .workspace-page')).toBeNull()
+        expect(container.querySelector('.n-drawer-mask')).not.toBeNull()
+        expect(drawerPanel().find('.n-scrollbar-container').exists()).toBe(true)
+        await drawerPanel().get('input[aria-label="配置草稿"]').setValue('保留配置')
+        await drawerPanel().get('[aria-label="关闭操作面板"]').trigger('click')
         await flushPromises()
         expect(wrapper.getComponent(NDrawer).props('show')).toBe(false)
         expect(wrapper.get('.test-list').element).toBe(list)
         await wrapper.get('[data-workspace-tools]').trigger('click')
         await flushPromises()
-        expect(wrapper.get<HTMLInputElement>('input[aria-label="配置草稿"]').element.value).toBe('保留配置')
+        expect(drawerPanel().get<HTMLInputElement>('input[aria-label="配置草稿"]').element.value).toBe('保留配置')
+        container.querySelector<HTMLElement>('.n-drawer-mask')!.click()
+        await flushPromises()
+        expect(wrapper.getComponent(NDrawer).props('show')).toBe(false)
+        expect(wrapper.get('.test-list').element).toBe(list)
+        wrapper.unmount()
+        wrapper = undefined
+        expect(document.querySelector('.n-drawer-container')).toBeNull()
     })
 
     it('完成项目解锁全部左侧链接，标题不再显示状态标签和刷新按钮', async () => {
diff --git a/src/components/ui/workspaceContext.ts b/src/components/ui/workspaceContext.ts
deleted file mode 100644
index c5a0a42..0000000
--- a/src/components/ui/workspaceContext.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-import type { InjectionKey, Ref } from 'vue'
-
-/** 操作抽屉挂载到当前工作区，覆盖内容而不挤压列表或遮住整个应用导航。 */
-export const workspaceHostKey: InjectionKey<Ref<HTMLElement | null>> = Symbol('workspace-host')
diff --git a/src/features/breakdown/BreakdownPage.test.ts b/src/features/breakdown/BreakdownPage.test.ts
index eaae85b..52d78f2 100644
--- a/src/features/breakdown/BreakdownPage.test.ts
+++ b/src/features/breakdown/BreakdownPage.test.ts
@@ -8,7 +8,7 @@ import { projectContextKey, type useProjectData } from '../projects/context'
 import type { ProjectDetail } from '../projects/types'
 import type { Checkpoint } from '../workflows/types'
 import type { BreakdownModule, EpisodePlan } from './types'
-import { selectMenu } from '../../testing/naive'
+import { drawerPanel, selectMenu } from '../../testing/naive'
 
 let wrapper: VueWrapper | undefined
 afterEach(() => {
@@ -147,7 +147,7 @@ describe('拆解页内容滚动', () => {
         const provided = mountPage()
         await wrapper!.get('[data-workspace-tools]').trigger('click')
         await flushPromises()
-        const config = wrapper!.get('.breakdown-config')
+        const config = drawerPanel().get('.breakdown-config')
         expect(config.get('label[for="group-size"]').text()).toBe('每组集数')
         expect(config.get<HTMLInputElement>('#group-size').element.value).toBe('3')
         expect(config.get('.breakdown-group-unit').text()).toBe('集 / 组')
@@ -165,7 +165,7 @@ describe('拆解页内容滚动', () => {
             await checkbox.trigger('click')
         }
         expect(preview.element.disabled).toBe(true)
-        expect(wrapper!.text()).toContain('至少选择一个抽取模块')
+        expect(drawerPanel().text()).toContain('至少选择一个抽取模块')
         await options[1]!.get('[role="checkbox"]').trigger('click')
         expect(preview.element.disabled).toBe(false)
         provided.data.value!.project.status = 'generating'
@@ -389,9 +389,9 @@ describe('拆解页内容滚动', () => {
         history.scrollTop = 120
         await wrapper!.get('[data-workspace-tools]').trigger('click')
         await flushPromises()
-        expect(wrapper!.get('.workspace-tools-drawer').element.closest('.workspace-split')).toBeNull()
-        await wrapper!.get('#group-size').setValue('2')
-        await wrapper!.get('[aria-label="关闭操作面板"]').trigger('click')
+        expect(drawerPanel().element.closest('.workspace-split')).toBeNull()
+        await drawerPanel().get('#group-size').setValue('2')
+        await drawerPanel().get('[aria-label="关闭操作面板"]').trigger('click')
         provided.data.value!.checkpoints = [checkpoint()]
         await flushPromises()
         expect(wrapper!.get('.breakdown-results-scroll .n-scrollbar-container').element).toBe(results)
@@ -404,7 +404,7 @@ describe('拆解页内容滚动', () => {
         expect(history.scrollTop).toBe(120)
         await wrapper!.get('[data-workspace-tools]').trigger('click')
         await flushPromises()
-        expect(wrapper!.get<HTMLInputElement>('#group-size').element.value).toBe('2')
+        expect(drawerPanel().get<HTMLInputElement>('#group-size').element.value).toBe('2')
         expect(fetcher).not.toHaveBeenCalled()
     })
 
@@ -423,8 +423,8 @@ describe('拆解页内容滚动', () => {
         expect(feedback.find('.breakdown-results-section').exists()).toBe(false)
         await feedback.get('button').trigger('click')
         await flushPromises()
-        expect(wrapper!.get('.workspace-tools-drawer').text()).toContain('缺少形态绑定')
-        expect(wrapper!.get('.workspace-tools-drawer').text()).toContain('重试失败抽取')
+        expect(drawerPanel().text()).toContain('缺少形态绑定')
+        expect(drawerPanel().text()).toContain('重试失败抽取')
     })
 
     it('没有正式剧集时保留可滚动的空状态，不显示拆解设置与结果', () => {
diff --git a/src/features/workflows/pages.test.ts b/src/features/workflows/pages.test.ts
index 9a4bce9..7806141 100644
--- a/src/features/workflows/pages.test.ts
+++ b/src/features/workflows/pages.test.ts
@@ -28,7 +28,7 @@ import SubjectIdentityPage from '../subject-identity/SubjectIdentityPage.vue'
 import { styleFixture, styleImageFixture } from '../visual-style/testing/fixtures'
 import { identityFixture, identityImageFixture } from '../subject-identity/testing/fixtures'
 import { getIdentitySession } from '../subject-identity/model'
-import { expandSections, selectControl, selectMenu } from '../../testing/naive'
+import { drawerPanel, expandSections, selectControl, selectMenu } from '../../testing/naive'
 import ProductionPage from '../production/ProductionPage.vue'
 import { getProductionSession } from '../production/model'
 
@@ -221,8 +221,8 @@ describe('内容级滚动下的生产反馈', () => {
         }
         await flushPromises()
         expect(wrapper.get('[data-workspace-tools]').attributes('aria-expanded')).toBe('true')
-        expect(wrapper.find('.workspace-tools-drawer .n-collapse-item--active').exists()).toBe(true)
-        expect(wrapper.text()).toContain('供应商不可用')
+        expect(drawerPanel().find('.n-collapse-item--active').exists()).toBe(true)
+        expect(drawerPanel().text()).toContain('供应商不可用')
     })
 })
 
@@ -302,7 +302,7 @@ describe('视觉风格与主体身份工作区', () => {
         })
         vi.stubGlobal('fetch', fetcher)
         await mountAssets('identity')
-        await wrapper!.get('[aria-label="关闭操作面板"]').trigger('click')
+        await drawerPanel().get('[aria-label="关闭操作面板"]').trigger('click')
         await flushPromises()
         const items = wrapper!.findAll('.identity-subject-item')
         expect(items).toHaveLength(3)
@@ -592,9 +592,9 @@ describe('视觉风格与主体身份工作区', () => {
         const post = fetcher.mock.calls.find(([, init]) => init?.method === 'POST')!
         expect(post[0]).toBe('/api/projects/page-test-project/subject-identities/generate')
         expect(JSON.parse(post[1]!.body as string)).toEqual({ force: false, concurrency: 3 })
-        expect(wrapper!.text()).toContain('本次存在部分失败')
-        expect(wrapper!.text()).toContain('含锁定 1')
-        expect(wrapper!.text()).toContain('文本模型超时')
+        expect(drawerPanel().text()).toContain('本次存在部分失败')
+        expect(drawerPanel().text()).toContain('含锁定 1')
+        expect(drawerPanel().text()).toContain('文本模型超时')
     })
 
     it('身份候选母版切换需确认，只发送正确 Subject ID 的 anchor PUT', async () => {
@@ -673,8 +673,8 @@ describe('视觉风格与主体身份工作区', () => {
         })
         vi.stubGlobal('fetch', fetcher)
         await mountAssets('identity')
-        expect(wrapper!.get('.identity-tools-intro').text()).toContain('为同一个人物、场景或道具固定稳定特征')
-        const cards = wrapper!.get('[aria-label="角色选角进度"]').findAll('.casting-item')
+        expect(drawerPanel().get('.identity-tools-intro').text()).toContain('为同一个人物、场景或道具固定稳定特征')
+        const cards = drawerPanel().get('[aria-label="角色选角进度"]').findAll('.casting-item')
         expect(cards).toHaveLength(2)
         expect(cards[0]!.get('.casting-item-name').text()).toBe(longName)
         expect(cards[0]!.get('.casting-item-ref').text()).toBe('@CH0001')
@@ -883,7 +883,7 @@ describe('工作台页面交互', () => {
             )
         vi.stubGlobal('fetch', fetcher)
         await mountSubjectImages()
-        await wrapper!.get('[aria-label="关闭操作面板"]').trigger('click')
+        await drawerPanel().get('[aria-label="关闭操作面板"]').trigger('click')
         const card = wrapper!.get('.form-image-card')
         expect(card.getComponent(NImage).props()).toMatchObject({ objectFit: 'cover', previewDisabled: false })
         await card.get('img').trigger('click')
@@ -951,11 +951,11 @@ describe('工作台页面交互', () => {
         await mountSubjectImages()
         await wrapper!.get('[aria-label="搜索形态图片"]').setValue('@CH0001')
         await confirmGeneration('补齐项目主参考图')
-        expect(wrapper!.get('[aria-label="生图批量回执"]').text()).toContain('部分形态生图失败')
-        expect(wrapper!.text()).toContain('服务暂不可用')
+        expect(drawerPanel().get('[aria-label="生图批量回执"]').text()).toContain('部分形态生图失败')
+        expect(drawerPanel().text()).toContain('服务暂不可用')
         const post = fetcher.mock.calls.find(([, init]) => init?.method === 'POST')!
         expect(JSON.parse(post[1]!.body as string)).toEqual({ concurrency: 2, force: false })
-        await wrapper!.get('.n-collapse [role="checkbox"]').trigger('click')
+        await drawerPanel().get('.n-collapse [role="checkbox"]').trigger('click')
         await confirmGeneration('为全项目新增候选图')
         const lastPost = fetcher.mock.calls.filter(([, init]) => init?.method === 'POST').at(-1)!
         expect(JSON.parse(lastPost[1]!.body as string).force).toBe(true)
@@ -1109,7 +1109,7 @@ describe('工作台页面交互', () => {
         await flushPromises()
         await confirmGeneration('生成本集导演设计')
         expect(button('补齐项目导演设计').disabled).toBe(true)
-        await wrapper!.get('[aria-label="关闭操作面板"]').trigger('click')
+        await drawerPanel().get('[aria-label="关闭操作面板"]').trigger('click')
         await flushPromises()
         expect(wrapper!.get('[data-workspace-tools]').attributes('aria-expanded')).toBe('false')
         expect(getOperation(fixture.id).pending).toBe(true)
@@ -1169,12 +1169,12 @@ describe('工作台页面交互', () => {
         button('刷新分镜').click()
         await flushPromises()
         expect(button('生成本集即时状态').disabled).toBe(false)
-        await wrapper!.get('#storyboard-repairs').setValue('0')
+        await drawerPanel().get('#storyboard-repairs').setValue('0')
         await confirmGeneration('生成本集即时状态')
         const post = fetcher.mock.calls.find(([, init]) => init?.method === 'POST')!
         expect(JSON.parse(post[1]!.body as string)).toEqual({ episodeNo: 1, persist: true, maxRepairAttempts: 0 })
-        expect(wrapper!.text()).toContain('校验失败，未保存本次生成结果')
-        expect(wrapper!.text()).toContain('缺少主体状态')
+        expect(drawerPanel().text()).toContain('校验失败，未保存本次生成结果')
+        expect(drawerPanel().text()).toContain('缺少主体状态')
     })
 
     it('批量 200 部分失败不显示全成功，默认补齐与显式覆盖参数独立', async () => {
@@ -1216,9 +1216,9 @@ describe('工作台页面交互', () => {
         await mountStoryboard()
         await flushPromises()
         await confirmGeneration('补齐项目导演设计')
-        expect(wrapper!.get('[aria-label="生成回执"] [role="alert"]').text()).toContain('存在失败')
-        expect(wrapper!.text()).toContain('模型校验失败')
-        await wrapper!.get('[role="checkbox"]').trigger('click')
+        expect(drawerPanel().get('[aria-label="生成回执"] [role="alert"]').text()).toContain('存在失败')
+        expect(drawerPanel().text()).toContain('模型校验失败')
+        await drawerPanel().get('[role="checkbox"]').trigger('click')
         await confirmGeneration('重生成全部导演设计')
         const posts = fetcher.mock.calls.filter(([, init]) => init?.method === 'POST')
         expect(posts.map(([, init]) => JSON.parse(init!.body as string))).toEqual([
@@ -1415,7 +1415,7 @@ describe('工作台页面交互', () => {
         button('预览分组').click()
         await flushPromises()
         expect(button('开始拆解').disabled).toBe(false)
-        await wrapper.get('#group-size').setValue('2')
+        await drawerPanel().get('#group-size').setValue('2')
         expect(document.body.textContent).not.toContain('开始拆解')
         button('预览分组').click()
         await flushPromises()
diff --git a/src/testing/naive.ts b/src/testing/naive.ts
index 9f8ffd0..392cfc4 100644
--- a/src/testing/naive.ts
+++ b/src/testing/naive.ts
@@ -1,6 +1,11 @@
-import { flushPromises, type VueWrapper } from '@vue/test-utils'
+import { DOMWrapper, flushPromises, type VueWrapper } from '@vue/test-utils'
 import { NSelect } from 'naive-ui'
 
+/** 抽屉通过真实 Teleport 挂到 body，测试也从外层读取，不禁用 Teleport 掩盖挂载问题。 */
+export function drawerPanel() {
+    return new DOMWrapper(document.body).get<HTMLElement>('.workspace-tools-drawer')
+}
+
 /** 通过真实菜单触发器访问低频功能，不直接调用组件内部方法绕过可见性。 */
 export async function selectMenu(label: string, option: string) {
     const trigger = [...document.querySelectorAll<HTMLButtonElement>('button')].find(