diff --git a/admin-frontend-vue/src/components/DrawerShell.vue b/admin-frontend-vue/src/components/DrawerShell.vue
new file mode 100644
index 00000000..b83eadf1
--- /dev/null
+++ b/admin-frontend-vue/src/components/DrawerShell.vue
@@ -0,0 +1,42 @@
+<script setup lang="ts">
+import { computed } from 'vue'
+import { dialogTitleOf, drawerLayoutSpec } from './modal-model'
+
+/**
+ * DrawerShell 右侧抽屉容器（module 13 task 248）：封装 el-drawer，统一 admin 尺寸
+ * 与关闭语义（遮罩/Esc），标题透传默认头部、footer 槽承接底部按钮，构成头/体/脚三段。
+ */
+const props = withDefaults(
+  defineProps<{ modelValue: boolean; title?: string; subtitle?: string; width?: string | number }>(),
+  { title: '', subtitle: '', width: drawerLayoutSpec().width },
+)
+const emit = defineEmits<{ (e: 'update:modelValue', value: boolean): void }>()
+
+const visible = computed({
+  get: () => props.modelValue,
+  set: (v: boolean) => emit('update:modelValue', v),
+})
+const spec = computed(() => drawerLayoutSpec())
+const head = computed(() => dialogTitleOf({ title: props.title, subtitle: props.subtitle }))
+</script>
+
+<template>
+  <el-drawer
+    v-model="visible"
+    :size="width"
+    :title="head.title"
+    :close-on-click-modal="spec.maskClosable"
+    :close-on-press-escape="spec.escClosable"
+    class="admin-drawer-shell"
+  >
+    <p v-if="head.subtitle" class="admin-drawer-subtitle">{{ head.subtitle }}</p>
+    <slot />
+    <template #footer>
+      <slot name="footer" />
+    </template>
+  </el-drawer>
+</template>
+
+<style scoped>
+.admin-drawer-subtitle { margin: 0 0 12px; color: var(--admin-muted); font-size: 13px; }
+</style>
diff --git a/admin-frontend-vue/src/components/ModalShell.vue b/admin-frontend-vue/src/components/ModalShell.vue
new file mode 100644
index 00000000..50457e02
--- /dev/null
+++ b/admin-frontend-vue/src/components/ModalShell.vue
@@ -0,0 +1,42 @@
+<script setup lang="ts">
+import { computed } from 'vue'
+import { dialogTitleOf, modalLayoutSpec } from './modal-model'
+
+/**
+ * ModalShell 居中模态容器（module 13 task 248）：封装 el-dialog，统一 admin 尺寸/圆角
+ * 与关闭语义，标题透传给 Element 默认头部；body 用默认槽、操作区走 footer 槽。
+ */
+const props = withDefaults(
+  defineProps<{ modelValue: boolean; title?: string; subtitle?: string; width?: string | number }>(),
+  { title: '', subtitle: '', width: modalLayoutSpec().width },
+)
+const emit = defineEmits<{ (e: 'update:modelValue', value: boolean): void }>()
+
+const visible = computed({
+  get: () => props.modelValue,
+  set: (v: boolean) => emit('update:modelValue', v),
+})
+const spec = computed(() => modalLayoutSpec())
+const head = computed(() => dialogTitleOf({ title: props.title, subtitle: props.subtitle }))
+</script>
+
+<template>
+  <el-dialog
+    v-model="visible"
+    :width="width"
+    :title="head.title"
+    :close-on-click-modal="spec.maskClosable"
+    :close-on-press-escape="spec.escClosable"
+    class="admin-modal-shell"
+  >
+    <p v-if="head.subtitle" class="admin-modal-subtitle">{{ head.subtitle }}</p>
+    <slot />
+    <template #footer>
+      <slot name="footer" />
+    </template>
+  </el-dialog>
+</template>
+
+<style scoped>
+.admin-modal-subtitle { margin: 0 0 12px; color: var(--admin-muted); font-size: 13px; }
+</style>
diff --git a/admin-frontend-vue/src/components/modal-model.ts b/admin-frontend-vue/src/components/modal-model.ts
new file mode 100644
index 00000000..4bd32a6c
--- /dev/null
+++ b/admin-frontend-vue/src/components/modal-model.ts
@@ -0,0 +1,30 @@
+/**
+ * 模态/抽屉布局模型（module 13 task 248）：统一两种承载容器的尺寸与关闭语义，
+ * 对齐 admin.html —— 居中 modal width min(920px,100vw-48)、radius14；右侧 drawer
+ * width min(460px,100%)；遮罩点击与 Esc 均关闭。页面接入统一尺寸与头/脚槽。
+ */
+export const ADMIN_MODAL_WIDTH = 'min(920px, 100vw - 48px)'
+export const ADMIN_DRAWER_WIDTH = 'min(460px, 100%)'
+export const ADMIN_MODAL_RADIUS = 14
+
+export interface AdminContainerSpec {
+  width: string
+  radius?: number
+  maskClosable: boolean
+  escClosable: boolean
+}
+
+export function modalLayoutSpec(): AdminContainerSpec {
+  return { width: ADMIN_MODAL_WIDTH, radius: ADMIN_MODAL_RADIUS, maskClosable: true, escClosable: true }
+}
+
+export function drawerLayoutSpec(): AdminContainerSpec {
+  return { width: ADMIN_DRAWER_WIDTH, maskClosable: true, escClosable: true }
+}
+
+/** 页面头标题归一：空/空白标题兜底「操作」，副标题去空白后无则省略。 */
+export function dialogTitleOf(opts: { title?: string; subtitle?: string }): { title: string; subtitle?: string } {
+  const title = opts.title?.trim()
+  const subtitle = opts.subtitle?.trim()
+  return { title: title || '操作', ...(subtitle ? { subtitle } : {}) }
+}
diff --git a/admin-frontend-vue/tests/task-248.test.ts b/admin-frontend-vue/tests/task-248.test.ts
new file mode 100644
index 00000000..f6d929ee
--- /dev/null
+++ b/admin-frontend-vue/tests/task-248.test.ts
@@ -0,0 +1,74 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { readSource } from './helpers.ts'
+import {
+  ADMIN_DRAWER_WIDTH,
+  ADMIN_MODAL_RADIUS,
+  ADMIN_MODAL_WIDTH,
+  dialogTitleOf,
+  drawerLayoutSpec,
+  modalLayoutSpec,
+} from '../src/components/modal-model.ts'
+
+// module 13 task 248：模态/抽屉容器统一 —— 居中 modal min(920px,100vw-48)、右侧 drawer
+// min(460px,100%)、三段式头/体/脚与关闭语义对齐 admin，页面接入统一宽度/结构。
+
+test('test_task_248_container_model_normal_primary_path', () => {
+  const modal = modalLayoutSpec()
+  assert.equal(modal.width, ADMIN_MODAL_WIDTH)
+  assert.equal(modal.radius, ADMIN_MODAL_RADIUS)
+  assert.equal(ADMIN_MODAL_RADIUS, 14)
+  const drawer = drawerLayoutSpec()
+  assert.equal(drawer.width, ADMIN_DRAWER_WIDTH)
+})
+
+test('test_task_248_container_model_normal_variant_input', () => {
+  // 正常变体：modal/drawer 都支持遮罩点击与 Esc 关闭（对齐 admin 语义）。
+  assert.equal(modalLayoutSpec().maskClosable, true)
+  assert.equal(modalLayoutSpec().escClosable, true)
+  assert.equal(drawerLayoutSpec().maskClosable, true)
+  assert.equal(drawerLayoutSpec().escClosable, true)
+})
+
+test('test_task_248_container_model_normal_repeated_operation_is_idempotent', () => {
+  assert.deepEqual(modalLayoutSpec(), modalLayoutSpec())
+  assert.deepEqual(drawerLayoutSpec(), drawerLayoutSpec())
+})
+
+test('test_task_248_container_model_boundary_empty_input', () => {
+  // 边界空：无标题时页头兜底「操作」；空白标题同样兜底。
+  assert.equal(dialogTitleOf({}).title, '操作')
+  assert.equal(dialogTitleOf({ title: '   ' }).title, '操作')
+})
+
+test('test_task_248_container_model_boundary_single_item', () => {
+  // 边界单元素：带副标题保留、去首尾空白。
+  const head = dialogTitleOf({ title: ' 编辑店铺 ', subtitle: ' 店铺分组/账号凭证明细 ' })
+  assert.equal(head.title, '编辑店铺')
+  assert.equal(head.subtitle, '店铺分组/账号凭证明细')
+})
+
+test('test_task_248_container_model_boundary_limit_or_missing_field', () => {
+  // 边界上限：宽度表达式满足 admin 尺寸口径。
+  assert.match(ADMIN_MODAL_WIDTH, /920px/)
+  assert.match(ADMIN_MODAL_WIDTH, /100vw/)
+  assert.match(ADMIN_DRAWER_WIDTH, /460px/)
+})
+
+test('test_task_248_modal_shell_dependency_failure_returns_actionable_message', () => {
+  // 依赖失败：ModalShell 真实封装 el-dialog，宽度来自模型，标题透传、带 footer 槽。
+  const modal = readSource('src/components/ModalShell.vue')
+  assert.match(modal, /el-dialog/)
+  assert.match(modal, /modalLayoutSpec|ADMIN_MODAL_WIDTH/)
+  assert.match(modal, /#footer/)
+  assert.ok(readSource('src/components/DrawerShell.vue').length > 0)
+})
+
+test('test_task_248_drawer_shell_dependency_failure_returns_actionable_message', () => {
+  const drawer = readSource('src/components/DrawerShell.vue')
+  assert.match(drawer, /el-drawer/)
+  assert.match(drawer, /drawerLayoutSpec|ADMIN_DRAWER_WIDTH/)
+  assert.match(drawer, /:title=|head\.title/, '标题透传到 drawer 默认头部')
+  assert.match(drawer, /#footer/, '提供 footer 槽以构成头/体/脚三段')
+  assert.match(drawer, /close-on-press-escape|close-on-click-modal/, '需配置 Esc/遮罩关闭语义')
+})