diff --git a/furniture-3d-system/src/app/asset-center/material-library/MaterialLibraryClient.test.tsx b/furniture-3d-system/src/app/asset-center/material-library/MaterialLibraryClient.test.tsx
index d89303b7..f7e6cc8d 100644
--- a/furniture-3d-system/src/app/asset-center/material-library/MaterialLibraryClient.test.tsx
+++ b/furniture-3d-system/src/app/asset-center/material-library/MaterialLibraryClient.test.tsx
@@ -134,7 +134,7 @@ describe('MaterialLibraryClient', () => {
 
     // Switch to substrate tab first
     await actor.click(screen.getByRole('button', { name: /基材录入/ }))
-    await actor.click(screen.getByRole('button', { name: '新建基材' }))
+    await actor.click(screen.getByRole('button', { name: /新建/ }))
     await actor.type(screen.getByLabelText('售价'), '200')
     await actor.click(screen.getByRole('button', { name: '创建' }))
 
diff --git a/furniture-3d-system/src/components/platform/PlatformSplitLayout.tsx b/furniture-3d-system/src/components/platform/PlatformSplitLayout.tsx
index 12d6e470..06064cae 100644
--- a/furniture-3d-system/src/components/platform/PlatformSplitLayout.tsx
+++ b/furniture-3d-system/src/components/platform/PlatformSplitLayout.tsx
@@ -47,6 +47,7 @@ export function PlatformSplitLayout({
 }: PlatformSplitLayoutProps) {
   return (
     <div className={cn('flex h-[calc(100vh-56px)] flex-col overflow-hidden', className)}>
+      {/* 页面标题区（如果有） */}
       {title ? (
         <header className="shrink-0 px-6 pt-5 pb-3">
           <div className="flex items-end justify-between">
@@ -76,6 +77,7 @@ export function PlatformSplitLayout({
         </header>
       ) : null}
 
+      {/* 指标条 */}
       {metrics && metrics.length > 0 ? (
         <div className="shrink-0 px-6 pb-2">
           <div className="flex items-center gap-4">
@@ -99,6 +101,7 @@ export function PlatformSplitLayout({
         </div>
       ) : null}
 
+      {/* 反馈提示 */}
       {feedback ? (
         <div className="shrink-0 px-6 pb-2">
           <div
@@ -122,6 +125,7 @@ export function PlatformSplitLayout({
         </div>
       ) : null}
 
+      {/* 主体：左右分栏 */}
       <main className="flex min-h-0 flex-1 overflow-hidden px-8 pb-6">
         <section
           className="mx-auto flex min-h-0 w-full max-w-[1680px] flex-1 overflow-hidden rounded-lg"
@@ -129,7 +133,10 @@ export function PlatformSplitLayout({
             backgroundColor: 'var(--color-surface-container)',
           }}
         >
+          {/* 左侧：3D 预览区 */}
           <div className="min-w-0 flex-1 p-3">{leftContent}</div>
+
+          {/* 右侧：检查器面板 */}
           <aside
             className={cn(
               'w-[var(--layout-right-panel-width)] max-w-[var(--layout-right-panel-max-width)] shrink-0 overflow-y-auto border-l p-4',
diff --git a/furniture-3d-system/src/server/services/__tests__/asset-center.service.test.ts b/furniture-3d-system/src/server/services/__tests__/asset-center.service.test.ts
index b55b1e28..a05db51b 100644
--- a/furniture-3d-system/src/server/services/__tests__/asset-center.service.test.ts
+++ b/furniture-3d-system/src/server/services/__tests__/asset-center.service.test.ts
@@ -3,7 +3,6 @@ import { assetCenterService } from '../asset-center.service'
 import {
   assetFamilyRepository,
   assetVariantRepository,
-  materialCategoryRepository,
   materialRepository,
   substrateRepository,
 } from '../../repositories'
@@ -22,17 +21,10 @@ jest.mock('../../repositories', () => ({
   substrateRepository: {
     findById: jest.fn(),
     findByCode: jest.fn(),
-    create: jest.fn(),
     findByIdWithRelations: jest.fn(),
   },
   materialRepository: {
     findById: jest.fn(),
-    findByNameAndCategory: jest.fn(),
-    create: jest.fn(),
-  },
-  materialCategoryRepository: {
-    findByName: jest.fn(),
-    create: jest.fn(),
   },
 }))
 
@@ -41,7 +33,6 @@ describe('assetCenterService', () => {
   const mockedAssetVariantRepository = jest.mocked(assetVariantRepository)
   const mockedSubstrateRepository = jest.mocked(substrateRepository)
   const mockedMaterialRepository = jest.mocked(materialRepository)
-  const mockedMaterialCategoryRepository = jest.mocked(materialCategoryRepository)
 
   beforeEach(() => {
     jest.clearAllMocks()
diff --git a/furniture-3d-system/src/server/services/asset-center.service.ts b/furniture-3d-system/src/server/services/asset-center.service.ts
index a7109b70..de28f553 100644
--- a/furniture-3d-system/src/server/services/asset-center.service.ts
+++ b/furniture-3d-system/src/server/services/asset-center.service.ts
@@ -586,9 +586,8 @@ class AssetCenterService {
   }
 
   async createSubstrate(input: CreateSubstrateInput): Promise<SubstrateDTO> {
-    // Check for exact duplicate: same 5 fields + same finishes
-    const inputFinishIds = new Set(input.finishIds ?? [])
-    const existingWithSameSpec = await prisma.substrate.findMany({
+    // Look for existing substrate with same 5-field spec
+    const existing = await prisma.substrate.findFirst({
       where: {
         categoryId: input.categoryId,
         environmentGradeId: input.environmentGradeId,
@@ -598,18 +597,60 @@ class AssetCenterService {
         isActive: true,
       },
       include: { finishes: { select: { finishId: true } } },
-    }) as Array<Substrate & { finishes: Array<{ finishId: string }> }>
-    for (const existing of existingWithSameSpec) {
+    }) as (Substrate & { finishes: Array<{ finishId: string }> }) | null
+
+    if (existing) {
+      // Same spec exists — merge new finishes and check for exact duplicate
       const existingFinishIds = new Set(existing.finishes.map((f) => f.finishId))
-      if (
-        existingFinishIds.size === inputFinishIds.size &&
-        [...inputFinishIds].every((id) => existingFinishIds.has(id))
-      ) {
+      const newFinishIds = (input.finishIds ?? []).filter((id) => !existingFinishIds.has(id))
+
+      // Exact duplicate: same spec + same finishes → reject
+      if (newFinishIds.length === 0 && (input.finishIds ?? []).length === existingFinishIds.size) {
         throw new AppError(ErrorCode.VALIDATION_FAILED, '基材库已有相同规格的基材，不可重复创建')
       }
+
+      // Merge new finishes into existing substrate
+      if (newFinishIds.length > 0) {
+        const allFinishIds = [...existingFinishIds, ...newFinishIds]
+        const payload = input.surfaceOptionId
+          ? await buildSubstratePayloadWithFinishes({
+              categoryId: existing.categoryId,
+              environmentGradeId: existing.environmentGradeId,
+              thicknessSpecId: existing.thicknessSpecId,
+              surfaceOptionId: input.surfaceOptionId!,
+              systemNameOptionId: existing.systemNameOptionId,
+              finishIds: allFinishIds,
+            })
+          : await (async () => {
+              const [cat, env, thick] = await Promise.all([
+                prisma.substrateCategory.findUnique({ where: { id: existing.categoryId } }),
+                prisma.substrateEnvironmentGrade.findUnique({ where: { id: existing.environmentGradeId } }),
+                prisma.substrateThicknessSpec.findUnique({ where: { id: existing.thicknessSpecId } }),
+              ])
+              const finishNames: string[] = []
+              const rows = await prisma.material.findMany({ where: { id: { in: allFinishIds } }, select: { name: true } })
+              finishNames.push(...rows.map((r) => r.name))
+              const thickness = thick!.name.toUpperCase()
+              const finishPart = finishNames.length > 0 ? finishNames.join(' ') : ''
+              return { generatedName: [thickness, env!.name, cat!.name, finishPart].filter(Boolean).join(' ') }
+            })()
+
+        await prisma.substrate.update({
+          where: { id: existing.id },
+          data: {
+            name: payload.generatedName,
+            finishes: {
+              create: newFinishIds.map((finishId) => ({ finish: { connect: { id: finishId } } })),
+            },
+          },
+        })
+      }
+
+      const updated = await substrateRepository.findByIdWithRelations(existing.id)
+      return toSubstrateDTO(updated!)
     }
 
-    // Auto-generate BC-XXXX code
+    // New spec — auto-generate BC-XXXX code
     const code = input.code?.trim() || await this.generateNextSubstrateCode()
 
     if (await substrateRepository.findByCode(code)) {
diff --git a/furniture-3d-system/src/server/services/index.ts b/furniture-3d-system/src/server/services/index.ts
index a994219c..19cc6481 100644
--- a/furniture-3d-system/src/server/services/index.ts
+++ b/furniture-3d-system/src/server/services/index.ts
@@ -1,6 +1,6 @@
 /**
  * Service 模块导出
- * 
+ *
  * @created 2026-01-30
  */
 
@@ -48,20 +48,20 @@ export type {
 } from './common-component.service'
 
 export { departmentService, DepartmentService } from './department.service'
-export type { 
-  CreateDepartmentInput, 
-  UpdateDepartmentInput, 
-  DepartmentDTO, 
-  DepartmentTreeNode 
+export type {
+  CreateDepartmentInput,
+  UpdateDepartmentInput,
+  DepartmentDTO,
+  DepartmentTreeNode
 } from './department.service'
 
 export { teamService, TeamService } from './team.service'
-export type { 
-  CreateTeamInput, 
-  UpdateTeamInput, 
-  TeamDTO, 
-  TeamListOptions, 
-  TeamListResult 
+export type {
+  CreateTeamInput,
+  UpdateTeamInput,
+  TeamDTO,
+  TeamListOptions,
+  TeamListResult
 } from './team.service'
 export { materialService, MaterialService } from './material.service'
 export type {