diff --git a/apps/server/src/agent-context/index.ts b/apps/server/src/agent-context/index.ts
deleted file mode 100644
index 88564af..0000000
--- a/apps/server/src/agent-context/index.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-export { BusinessContextService } from './business-context.service';
-export { BUSINESS_ENTITIES, BUSINESS_WORKFLOWS } from './business-context.registry';
-export type {
-  BusinessContextPrincipal,
-  BusinessContextResult,
-  BusinessEntity,
-  BusinessEntityField,
-  BusinessEntityRelation,
-  BusinessWorkflow,
-  BusinessWorkflowNextStep,
-  BusinessWorkflowStage,
-} from './business-context.types';
diff --git a/apps/server/src/ai-chat/ai-chart.service.ts b/apps/server/src/ai-chat/ai-chart.service.ts
index 76e68c4..bfbb112 100644
--- a/apps/server/src/ai-chat/ai-chart.service.ts
+++ b/apps/server/src/ai-chat/ai-chart.service.ts
@@ -1,6 +1,7 @@
 import { BadRequestException, Injectable } from '@nestjs/common';
 import { uuidV7 } from '../common/uuid-v7';
 import type { AiReviewColumn, AiReviewRow } from './entities/ai-review.entity';
+import { assertKeys, isPlainRecord, requireString } from './ai-validation';
 
 const MAX_TITLE = 50;
 const MAX_COLUMNS = 10;
@@ -21,27 +22,6 @@ export interface AiChart {
   rows: AiReviewRow[];
 }
 
-function isPlainRecord(value: unknown): value is Record<string, unknown> {
-  return Boolean(value) && typeof value === 'object' && !Array.isArray(value);
-}
-
-function requireString(value: unknown, label: string, max: number): string {
-  if (typeof value !== 'string' || !value.trim()) {
-    throw new BadRequestException(`${label}必须是字符串`);
-  }
-  const trimmed = value.trim();
-  if (trimmed.length > max) {
-    throw new BadRequestException(`${label}长度不能超过 ${max}`);
-  }
-  return trimmed;
-}
-
-function assertKeys(raw: Record<string, unknown>, allowed: Set<string>, label: string): void {
-  for (const key of Object.keys(raw)) {
-    if (!allowed.has(key)) throw new BadRequestException(`${label}包含未知属性: ${key}`);
-  }
-}
-
 /**
  * Validates the `render_chart` tool arguments. The model sends a
  * whitelisted tabular shape (columns + rows); the frontend converts it
diff --git a/apps/server/src/ai-chat/ai-chat.constants.ts b/apps/server/src/ai-chat/ai-chat.constants.ts
index 5948a65..04132e7 100644
--- a/apps/server/src/ai-chat/ai-chat.constants.ts
+++ b/apps/server/src/ai-chat/ai-chat.constants.ts
@@ -175,6 +175,7 @@ export const SYSTEM_PROMPT = `你是恭学系统的业务助理。回答必须
 当用户需要录入或修改业务数据时，先调用 render_form 生成确认表单，提示用户填写并提交；只有在用户通过表单提交确认后，才能执行写操作工具（如 create_student、update_students）。
 新增学生示例：render_form 的 fields 使用 name/phone/gender/studentNo。
 修改学生示例：批量修改姓名/档案时，render_form 的字段可用 name_<学生ID> 等命名展示待修改内容，用户提交后再调用 update_students，每条更新必须带学生 id。
+需要向用户询问信息、让用户选择或确认时（例如：确认导入策略与列映射、选择班级/房型/老师、补充必填信息、二选一确认），优先调用 render_form 生成简短的问题卡片（字段 1-4 个：选项用 select、短文本用 input、日期用 date、多行说明用 textarea），让用户直接在卡片上作答，不要用大段文字逐项提问；只有开放式讨论或无法用表单表达时才用文字提问。问题卡片标题用一句完整问题，字段 label 即选项/问题文案，必填项设置 required。
 当用户上传 Excel 并需要批量导入（学生、宿舍、换宿、入住记录）时，按以下固定流程执行：
 1. 先根据消息附带的 Excel 提取文本（工作表名 + tab 分隔行）判断业务类型与表头，向用户说明将导入什么、依赖什么；需要确认的列映射、校区或策略先在聊天中与用户确认，不要替用户默认做出影响数据的决定。
 2. 用户确认后调用 start_import_wizard：必须传入 attachmentId 和 stages（业务类型 stepKey：students 学生 / rooms 宿舍 / checkins 入住 / transfers 换宿，以及对应工作表 sheet 名），并把确认结果一并传入（mapping 列映射、organization 校区、updateExisting 是否更新已有记录、duplicatePolicy 重复行策略 error/skip、skipUnmatched 是否跳过未匹配行）。系统直接从文件解析行数据，禁止把整表数据抄进工具参数或凭空补全。
diff --git a/apps/server/src/ai-chat/ai-chat.import-confirm.ts b/apps/server/src/ai-chat/ai-chat.import-confirm.ts
index 55e20b8..1f8d91f 100644
--- a/apps/server/src/ai-chat/ai-chat.import-confirm.ts
+++ b/apps/server/src/ai-chat/ai-chat.import-confirm.ts
@@ -87,15 +87,6 @@ export function parseConfirmedSettings(parsedRecord: Record<string, unknown>): I
   return settings;
 }
 
-/** 解析 resolve 端点嵌套的 settings 参数（缺省为空对象）。 */
-export function parseNestedSettings(raw: unknown): ImportRunSettings {
-  if (raw === undefined || raw === null) return {};
-  if (typeof raw !== 'object' || Array.isArray(raw)) {
-    throw new BadRequestException('settings 参数格式错误');
-  }
-  return parseConfirmedSettings(raw as Record<string, unknown>);
-}
-
 export function isExcelAttachment(attachment: {
   mimeType: string;
   originalName: string;
diff --git a/apps/server/src/ai-chat/ai-chat.service.spec.ts b/apps/server/src/ai-chat/ai-chat.service.spec.ts
index 5312c74..81efe87 100644
--- a/apps/server/src/ai-chat/ai-chat.service.spec.ts
+++ b/apps/server/src/ai-chat/ai-chat.service.spec.ts
@@ -30,11 +30,8 @@ function createService(
     ...messageOverrides,
   };
   const reviewService = {
-    createReview: jest.fn(),
-    expirePreviousReviews: jest.fn().mockResolvedValue([]),
     findOwnedPending: jest.fn(),
     findOwned: jest.fn(),
-    findPendingByAssistantMessage: jest.fn(),
     submitSection: jest.fn(),
     submitGroup: jest.fn(),
     submitAll: jest.fn(),
@@ -303,10 +300,7 @@ describe('AiChatService', () => {
           serialize: jest.fn((value) => value),
         } as never,
         {
-          createReview: jest.fn(),
-          expirePreviousReviews: jest.fn().mockResolvedValue([]),
           findOwnedPending: jest.fn(),
-          findPendingByAssistantMessage: jest.fn(),
           serialize: jest.fn((value) => value),
           submit: jest.fn(),
         } as never,
@@ -466,10 +460,7 @@ describe('AiChatService', () => {
         serialize: jest.fn((value) => value),
       } as never,
       {
-        createReview: jest.fn(),
-        expirePreviousReviews: jest.fn().mockResolvedValue([]),
         findOwnedPending: jest.fn(),
-        findPendingByAssistantMessage: jest.fn(),
         serialize: jest.fn((value) => value),
         submit: jest.fn(),
       } as never,
@@ -497,7 +488,7 @@ describe('AiChatService', () => {
       jest.fn(),
     );
 
-    expect(emitted.some(({ event }) => event === 'ui.form')).toBe(true);
+    expect(emitted.some(({ event }) => event === 'ui.artifact')).toBe(true);
     expect(messageSave).toHaveBeenCalledWith(
       expect.objectContaining({
         id: 12,
@@ -508,7 +499,7 @@ describe('AiChatService', () => {
     );
   });
 
-  it('render_chart 生成的图表通过 ui.chart 推送并追加到消息 metadata', async () => {
+  it('render_chart 生成的图表通过 ui.artifact 推送并追加到消息 metadata', async () => {
     const conversation = {
       id: 3,
       userId: 7,
@@ -612,10 +603,7 @@ describe('AiChatService', () => {
         serialize: jest.fn((value) => value),
       } as never,
       {
-        createReview: jest.fn(),
-        expirePreviousReviews: jest.fn().mockResolvedValue([]),
         findOwnedPending: jest.fn(),
-        findPendingByAssistantMessage: jest.fn(),
         serialize: jest.fn((value) => value),
         submit: jest.fn(),
       } as never,
@@ -643,7 +631,7 @@ describe('AiChatService', () => {
       jest.fn(),
     );
 
-    expect(emitted.some(({ event }) => event === 'ui.chart')).toBe(true);
+    expect(emitted.some(({ event }) => event === 'ui.artifact')).toBe(true);
     expect(messageSave).toHaveBeenCalledWith(
       expect.objectContaining({
         id: 12,
@@ -719,10 +707,7 @@ describe('AiChatService', () => {
         serialize: jest.fn((value) => value),
       } as never,
       {
-        createReview: jest.fn(),
-        expirePreviousReviews: jest.fn().mockResolvedValue([]),
         findOwnedPending: jest.fn().mockResolvedValue(review),
-        findPendingByAssistantMessage: jest.fn(),
         findOwned: jest.fn(),
         submitSection: jest.fn(),
         submitAll,
@@ -757,7 +742,7 @@ describe('AiChatService', () => {
     expect(emitted).toHaveLength(0);
   });
 
-  it('submitReview 校验写入权限、先 onReady 再推 ui.review，并标记原卡片已提交', async () => {
+  it('submitReview 校验写入权限、先 onReady 再推 ui.artifact，并标记原卡片已提交', async () => {
     const conversation = {
       id: 3,
       userId: 7,
@@ -858,10 +843,7 @@ describe('AiChatService', () => {
         serialize: jest.fn((value) => value),
       } as never,
       {
-        createReview: jest.fn(),
-        expirePreviousReviews: jest.fn().mockResolvedValue([]),
         findOwnedPending: jest.fn().mockResolvedValue(review),
-        findPendingByAssistantMessage: jest.fn(),
         findOwned: jest.fn(),
         submitSection: jest.fn(),
         submitAll,
@@ -897,10 +879,13 @@ describe('AiChatService', () => {
     expect(assertPermission).toHaveBeenCalledWith(expect.anything(), 'student:create');
     expect(submitAll).toHaveBeenCalledTimes(1);
     expect(emitted[0]).toMatchObject({
-      event: 'ui.review',
-      data: { messageId: 12, review: expect.objectContaining({ id: 'review-1' }) },
+      event: 'ui.artifact',
+      data: {
+        messageId: 12,
+        artifact: expect.objectContaining({ id: 'review-1', type: 'review' }),
+      },
     });
-    expect(order.indexOf('onReady')).toBeLessThan(order.indexOf('emit:ui.review'));
+    expect(order.indexOf('onReady')).toBeLessThan(order.indexOf('emit:ui.artifact'));
     expect(messageSave).toHaveBeenCalledWith(
       expect.objectContaining({
         id: 12,
@@ -1132,10 +1117,7 @@ describe('AiChatService', () => {
         serialize: jest.fn((value) => value),
       } as never,
       {
-        createReview: jest.fn(),
-        expirePreviousReviews: jest.fn().mockResolvedValue([]),
         findOwnedPending: jest.fn(),
-        findPendingByAssistantMessage: jest.fn(),
         serialize: jest.fn((value) => value),
         submit: jest.fn(),
       } as never,
@@ -1174,10 +1156,7 @@ describe('AiChatService', () => {
         serialize: jest.fn((value) => value),
       } as never,
       {
-        createReview: jest.fn(),
-        expirePreviousReviews: jest.fn().mockResolvedValue([]),
         findOwnedPending: jest.fn(),
-        findPendingByAssistantMessage: jest.fn(),
         serialize: jest.fn((value) => value),
         submit: jest.fn(),
       } as never,
@@ -1260,10 +1239,7 @@ describe('AiChatService', () => {
         serialize: jest.fn((value) => value),
       } as never,
       {
-        createReview: jest.fn(),
-        expirePreviousReviews: jest.fn().mockResolvedValue([]),
         findOwnedPending: jest.fn(),
-        findPendingByAssistantMessage: jest.fn(),
         serialize: jest.fn((value) => value),
         submit: jest.fn(),
       } as never,
diff --git a/apps/server/src/ai-chat/ai-chat.submissions.flow.ts b/apps/server/src/ai-chat/ai-chat.submissions.flow.ts
index a0e743f..ac23ca5 100644
--- a/apps/server/src/ai-chat/ai-chat.submissions.flow.ts
+++ b/apps/server/src/ai-chat/ai-chat.submissions.flow.ts
@@ -190,10 +190,6 @@ export async function submitReview(
 
     const serialized = context.reviewService.serialize(updatedReview);
     onReady();
-    emit('ui.review', {
-      messageId: updatedReview.assistantMessageId,
-      review: serialized,
-    });
     emit('ui.artifact', {
       messageId: updatedReview.assistantMessageId,
       artifact: buildA2uiArtifact({
diff --git a/apps/server/src/ai-chat/ai-chat.tool-actions.ts b/apps/server/src/ai-chat/ai-chat.tool-actions.ts
index 390a140..c4795d5 100644
--- a/apps/server/src/ai-chat/ai-chat.tool-actions.ts
+++ b/apps/server/src/ai-chat/ai-chat.tool-actions.ts
@@ -1,4 +1,3 @@
-import { AiReview } from './entities/ai-review.entity';
 import type { AiChatServiceContext, AiSseEmitter, ModelToolCall } from './ai-chat.types';
 import { buildA2uiArtifact } from './ai-a2ui.artifact';
 import { finishToolRun, startToolRun } from './ai-chat.tools';
@@ -46,7 +45,6 @@ export async function executeRenderForm(
           await context.messages.save(oldAssistant);
         }
         const expiredPayload = context.formService.serialize(expired);
-        emit('ui.form', { messageId: expired.assistantMessageId, form: expiredPayload });
         emit('ui.artifact', {
           messageId: expired.assistantMessageId,
           artifact: buildA2uiArtifact({
@@ -67,10 +65,6 @@ export async function executeRenderForm(
     await context.messages.save(assistant);
 
     await finishToolRun(context, run, call, startedAt, { status: 'success', summary: '已生成表单，等待用户填写' }, emit);
-    emit('ui.form', {
-      messageId,
-      form: context.formService.serialize(form),
-    });
     emit('ui.artifact', {
       messageId,
       artifact: buildA2uiArtifact({
@@ -93,131 +87,6 @@ export async function executeRenderForm(
   }
 }
 
-export async function executeRenderReview(
-  context: AiChatServiceContext,
-  messageId: number,
-  call: ModelToolCall,
-  userId: number,
-  emit: AiSseEmitter,
-): Promise<string> {
-  const { run, parsedArgs, startedAt } = await startToolRun(context, messageId, call, emit, {
-    toolName: 'render_review',
-    skillKey: null,
-    argumentsData: null,
-  });
-
-  try {
-    const existingReview = await context.reviewService.findPendingByAssistantMessage(messageId);
-    if (existingReview) {
-      const denial = `本回合已生成导入预览《${existingReview.title}》，请直接提示用户审阅并确认，不要再次调用 render_review；如需多个分表，应全部合并到同一张预览卡。`;
-      await finishToolRun(context, run, call, startedAt, { status: 'failed', summary: denial, error: denial }, emit);
-      return JSON.stringify({ status: 'failed', error: denial });
-    }
-    const assistant = await context.messages.findOne({ where: { id: messageId } });
-    if (!assistant) throw new Error('assistant message missing');
-    const parsedRecord =
-      parsedArgs && typeof parsedArgs === 'object' && !Array.isArray(parsedArgs)
-        ? (parsedArgs as Record<string, unknown>)
-        : {};
-    const attachmentId =
-      typeof parsedRecord.attachmentId === 'number' ? parsedRecord.attachmentId : undefined;
-
-    let review: AiReview;
-    if (Number.isInteger(attachmentId) && (attachmentId as number) > 0) {
-      const [attachment] = await context.attachmentService.requireReadyOwned(userId, [
-        attachmentId as number,
-      ]);
-      if (
-        !attachment.mimeType.includes('spreadsheetml') &&
-        !attachment.mimeType.includes('excel') &&
-        !attachment.mimeType.includes('csv')
-      ) {
-        throw new Error('附件不是 Excel 文件，无法生成导入预览');
-      }
-      if (!context.excelReader) throw new Error('Excel 解析器未配置');
-      const buffer = await context.attachmentService.readStoredBuffer(attachment);
-      const sheets = await context.excelReader.loadSheets(buffer);
-      const sections = await context.reviewService.buildSectionsFromWorkbook(sheets, parsedArgs);
-      review = await context.reviewService.createReview(
-        { userId, conversationId: assistant.conversationId, assistantMessageId: messageId },
-        { title: parsedRecord.title, summary: parsedRecord.summary ?? null, sections },
-      );
-    } else {
-      review = await context.reviewService.createReview(
-        { userId, conversationId: assistant.conversationId, assistantMessageId: messageId },
-        parsedArgs,
-      );
-    }
-    const expiredReviews = await context.reviewService.expirePreviousReviews(
-      userId,
-      assistant.conversationId,
-      review.id,
-    );
-    await Promise.all(
-      expiredReviews.map(async (expired) => {
-        const oldAssistant = await context.messages.findOne({
-          where: { id: expired.assistantMessageId, conversationId: assistant.conversationId },
-        });
-        const oldA2ui = oldAssistant?.metadata?.a2uiReview;
-        if (oldAssistant && oldA2ui && typeof oldA2ui === 'object' && !Array.isArray(oldA2ui)) {
-          oldAssistant.metadata = {
-            ...oldAssistant.metadata,
-            a2uiReview: context.reviewService.serialize(expired),
-          };
-          await context.messages.save(oldAssistant);
-        }
-        emit('ui.review', {
-          messageId: expired.assistantMessageId,
-          review: context.reviewService.serialize(expired),
-        });
-        emit('ui.artifact', {
-          messageId: expired.assistantMessageId,
-          artifact: buildA2uiArtifact({
-            type: 'review',
-            id: expired.id,
-            status: expired.status === 'submitted' ? 'submitted' : 'expired',
-            messageId: expired.assistantMessageId,
-            conversationId: assistant.conversationId,
-            payload: context.reviewService.serialize(expired),
-          }),
-        });
-      }),
-    );
-    assistant.metadata = {
-      ...assistant.metadata,
-      a2uiReview: context.reviewService.serialize(review),
-    };
-    await context.messages.save(assistant);
-
-    await finishToolRun(context, run, call, startedAt, { status: 'success', summary: '已生成导入预览，等待用户确认' }, emit);
-    emit('ui.review', {
-      messageId,
-      review: context.reviewService.serialize(review),
-    });
-    emit('ui.artifact', {
-      messageId,
-      artifact: buildA2uiArtifact({
-        type: 'review',
-        id: review.id,
-        status: review.status === 'submitted' ? 'submitted' : 'pending',
-        messageId,
-        conversationId: assistant.conversationId,
-        payload: context.reviewService.serialize(review),
-      }),
-    });
-    return JSON.stringify({
-      status: 'success',
-      reviewId: review.id,
-      message: '导入预览已显示给用户，请提示用户审阅并确认',
-    });
-  } catch (reason) {
-    const errorMessage =
-      reason instanceof Error && reason.message ? reason.message.slice(0, 120) : '导入预览参数无效';
-    await finishToolRun(context, run, call, startedAt, { status: 'failed', summary: errorMessage, error: errorMessage }, emit);
-    return JSON.stringify({ status: 'failed', error: errorMessage });
-  }
-}
-
 export async function executeRenderChart(
   context: AiChatServiceContext,
   messageId: number,
@@ -248,10 +117,6 @@ export async function executeRenderChart(
     await context.messages.save(assistant);
 
     await finishToolRun(context, run, call, startedAt, { status: 'success', summary: '已生成图表' }, emit);
-    emit('ui.chart', {
-      messageId,
-      chart: context.chartService.serialize(chart),
-    });
     emit('ui.artifact', {
       messageId,
       artifact: buildA2uiArtifact({
@@ -275,6 +140,5 @@ export async function executeRenderChart(
 }
 
 export {
-  compactImportWizard,
   executeStartImportWizard,
 } from './ai-chat.tool-actions.import';
diff --git a/apps/server/src/ai-chat/ai-chat.types.ts b/apps/server/src/ai-chat/ai-chat.types.ts
index bb6f598..8047659 100644
--- a/apps/server/src/ai-chat/ai-chat.types.ts
+++ b/apps/server/src/ai-chat/ai-chat.types.ts
@@ -182,9 +182,6 @@ export type AiSseEventName =
   | 'tool.started'
   | 'tool.completed'
   | 'tool.failed'
-  | 'ui.form'
-  | 'ui.review'
-  | 'ui.chart'
   | 'ui.artifact'
   | 'ui.import_wizard'
   | 'attachment.processed'
diff --git a/apps/server/src/ai-chat/ai-form.service.ts b/apps/server/src/ai-chat/ai-form.service.ts
index a72488f..74e3b2e 100644
--- a/apps/server/src/ai-chat/ai-form.service.ts
+++ b/apps/server/src/ai-chat/ai-form.service.ts
@@ -3,6 +3,7 @@ import { InjectRepository } from '@nestjs/typeorm';
 import { In, Repository } from 'typeorm';
 import { uuidV7 } from '../common/uuid-v7';
 import { AiForm, type AiFormField } from './entities/ai-form.entity';
+import { isPlainRecord, requireString } from './ai-validation';
 
 export const A2UI_FIELD_TYPES = ['input', 'textarea', 'number', 'select', 'date'] as const;
 
@@ -40,34 +41,10 @@ interface ValidatedFormSchema {
   fields: AiFormField[];
 }
 
-function isPlainRecord(value: unknown): value is Record<string, unknown> {
-  return Boolean(value) && typeof value === 'object' && !Array.isArray(value);
-}
-
 function isShortString(value: unknown, max: number): value is string {
   return typeof value === 'string' && value.length <= max;
 }
 
-function requireString(
-  value: unknown,
-  label: string,
-  max: number,
-  optional = false,
-): string {
-  if (value === undefined || value === null) {
-    if (optional) return '';
-    throw new BadRequestException(`${label}不能为空`);
-  }
-  if (typeof value !== 'string' || !value.trim()) {
-    throw new BadRequestException(`${label}必须是字符串`);
-  }
-  const trimmed = value.trim();
-  if (trimmed.length > max) {
-    throw new BadRequestException(`${label}长度不能超过 ${max}`);
-  }
-  return trimmed;
-}
-
 /**
  * Server-side A2UI form lifecycle:
  * schema validation + persistence, owned lookup, submitted-value
@@ -171,7 +148,7 @@ export class AiFormService {
     return result;
   }
 
-  /** Public shape sent via `ui.form` SSE and mirrored into message metadata. */
+  /** Public shape used by message metadata and the unified `ui.artifact` payload. */
   serialize(form: AiForm): Record<string, unknown> {
     return {
       id: form.id,
diff --git a/apps/server/src/ai-chat/ai-review.enrich.ts b/apps/server/src/ai-chat/ai-review.enrich.ts
index 1d932e7..386f8d9 100644
--- a/apps/server/src/ai-chat/ai-review.enrich.ts
+++ b/apps/server/src/ai-chat/ai-review.enrich.ts
@@ -1,10 +1,4 @@
-import { DataSource, IsNull, Repository } from 'typeorm';
 import { Organization } from '../entities/organization.entity';
-import { Room } from '../entities/room.entity';
-import { Student } from '../entities/student.entity';
-import { Occupancy } from '../entities/occupancy.entity';
-import type { AiReviewSection } from './entities/ai-review.entity';
-import { DATE_RE, MAX_ISSUES, normalizePhone, toDateString } from './ai-review.shared';
 
 export function resolveOrganizationId(
   raw: unknown,
@@ -20,258 +14,3 @@ export function resolveOrganizationId(
   const match = organizations.find((org) => org.name === text || org.code === text);
   return match?.id ?? null;
 }
-
-/**
- * Preview-time database validation. The AI's parsed rows are checked
- * against the current system (organizations, duplicate students/rooms,
- * occupancy state, transfer targets) and the findings are appended to
- * each section's issues so the user sees them BEFORE confirming.
- * Problems found here do not block preview creation; the import phase
- * re-checks everything and skips problematic rows.
- */
-export async function enrichWithIssues(
-  dataSource: DataSource,
-  sections: AiReviewSection[],
-): Promise<AiReviewSection[]> {
-  try {
-    const organizationRepo = dataSource.getRepository(Organization);
-    const studentRepo = dataSource.getRepository(Student);
-    const roomRepo = dataSource.getRepository(Room);
-    const occupancyRepo = dataSource.getRepository(Occupancy);
-    const organizations = await organizationRepo.find({ where: { status: 'active' } });
-
-    const roomSections = sections.filter((section) => section.type === 'rooms');
-    const incomingRoomNumbers = new Set(
-      roomSections.flatMap((section) =>
-        (section.rows ?? [])
-          .map((row) =>
-            row.roomNumber === undefined ? '' : String(row.roomNumber).trim(),
-          )
-          .filter(Boolean),
-      ),
-    );
-
-    const enriched: AiReviewSection[] = [];
-    for (const section of sections) {
-      const issues = [...section.issues];
-      if (section.type === 'students') {
-        await enrichStudentIssues(section, issues, organizations, studentRepo);
-      } else if (section.type === 'rooms') {
-        await enrichRoomIssues(section, issues, roomRepo);
-      } else if (section.type === 'transfers') {
-        await enrichTransferIssues(
-          section,
-          issues,
-          studentRepo,
-          roomRepo,
-          occupancyRepo,
-          incomingRoomNumbers,
-        );
-      } else if (section.type === 'checkins') {
-        await enrichCheckinIssues(
-          section,
-          issues,
-          studentRepo,
-          roomRepo,
-          occupancyRepo,
-        );
-      }
-      enriched.push({
-        ...section,
-        issues: [...new Set(issues)].slice(-MAX_ISSUES),
-      });
-    }
-    return enriched;
-  } catch {
-    // Database validation is best-effort; fall back to model-provided issues.
-    return sections;
-  }
-}
-
-async function enrichStudentIssues(
-  section: AiReviewSection,
-  issues: string[],
-  organizations: Organization[],
-  studentRepo: Repository<Student>,
-): Promise<void> {
-  const seen = new Set<string>();
-  for (const row of section.rows) {
-    const name = row.name === undefined || row.name === null ? '' : String(row.name).trim();
-    const phone = normalizePhone(row.phone);
-    const studentNo =
-      row.studentNo === undefined || row.studentNo === null
-        ? ''
-        : String(row.studentNo).trim();
-    const organizationId = resolveOrganizationId(row.organization, organizations);
-    if (organizationId === null) {
-      issues.push(`学生「${name}」的所属机构无法识别，导入时将按本机构处理`);
-    }
-    const dedupeKey = phone ? `phone:${phone}` : studentNo ? `no:${studentNo}` : '';
-    if (dedupeKey && seen.has(dedupeKey)) {
-      issues.push(`学生「${name}」与同一批次中的其他学生手机号/学号重复，导入时将跳过`);
-    }
-    seen.add(dedupeKey);
-    if (!dedupeKey) continue;
-    const existing = phone
-      ? await studentRepo.findOne({ where: { phone } })
-      : await studentRepo.findOne({ where: { studentNo } });
-    if (existing) {
-      issues.push(`学生「${name}」已存在（按手机号/学号匹配），导入时将跳过`);
-    }
-  }
-}
-
-async function enrichRoomIssues(
-  section: AiReviewSection,
-  issues: string[],
-  roomRepo: Repository<Room>,
-): Promise<void> {
-  const seen = new Set<string>();
-  for (const row of section.rows) {
-    const roomNumber =
-      row.roomNumber === undefined || row.roomNumber === null
-        ? ''
-        : String(row.roomNumber).trim();
-    if (!roomNumber) continue;
-    if (seen.has(roomNumber)) {
-      issues.push(`宿舍「${roomNumber}」在同一批次中重复，导入时将跳过`);
-      continue;
-    }
-    seen.add(roomNumber);
-    const existing = await roomRepo.findOne({ where: { roomNumber } });
-    if (existing) {
-      issues.push(`宿舍「${roomNumber}」已存在，导入时将跳过`);
-    }
-  }
-}
-
-async function enrichCheckinIssues(
-  section: AiReviewSection,
-  issues: string[],
-  studentRepo: Repository<Student>,
-  roomRepo: Repository<Room>,
-  occupancyRepo: Repository<Occupancy>,
-): Promise<void> {
-  const seen = new Set<string>();
-  for (const row of section.rows) {
-    const name = row.name === undefined || row.name === null ? '' : String(row.name).trim();
-    const phone = normalizePhone(row.phone);
-    const studentNo =
-      row.studentNo === undefined || row.studentNo === null
-        ? ''
-        : String(row.studentNo).trim();
-    const roomNumber =
-      row.roomNumber === undefined || row.roomNumber === null
-        ? ''
-        : String(row.roomNumber).trim();
-    if (!name || !roomNumber) {
-      issues.push('存在姓名或宿舍号为空的入住记录行，导入时将跳过');
-      continue;
-    }
-    if (!phone && !studentNo) {
-      issues.push(`学生「${name}」缺少手机号/学号，无法关联或创建学生`);
-      continue;
-    }
-    const dedupeKey = phone ? `phone:${phone}` : `no:${studentNo}`;
-    if (seen.has(dedupeKey)) {
-      issues.push(`学生「${name}」与同一批次中的其他行手机号/学号重复，导入时将跳过`);
-    }
-    seen.add(dedupeKey);
-
-    const rawDate =
-      row.checkInDate === undefined || row.checkInDate === null
-        ? ''
-        : String(row.checkInDate).trim();
-    if (rawDate && !DATE_RE.test(rawDate)) {
-      issues.push(`学生「${name}」的入住日期格式无效（应为 YYYY-MM-DD），导入时按当天处理`);
-    }
-
-    const student = phone
-      ? await studentRepo.findOne({ where: { phone } })
-      : await studentRepo.findOne({ where: { studentNo } });
-    if (!student) {
-      issues.push(`学生「${name}」不存在，导入时将自动创建并归入本机构`);
-    }
-    const room = roomNumber
-      ? await roomRepo.findOne({ where: { roomNumber } })
-      : null;
-    if (!room) {
-      issues.push(`宿舍「${roomNumber}」不存在，导入时将自动创建`);
-    }
-
-    const checkOutDate = toDateString(row.checkOutDate);
-    if (student && !checkOutDate) {
-      const active = await occupancyRepo.findOne({
-        where: { studentId: student.id, checkOutDate: IsNull() },
-        order: { id: 'DESC' },
-      });
-      if (active) {
-        issues.push(
-          `学生「${name}」当前已在住，导入时将跳过（如为历史记录请填写退宿日期）`,
-        );
-      }
-    }
-  }
-}
-
-async function enrichTransferIssues(
-  section: AiReviewSection,
-  issues: string[],
-  studentRepo: Repository<Student>,
-  roomRepo: Repository<Room>,
-  occupancyRepo: Repository<Occupancy>,
-  incomingRoomNumbers: Set<string>,
-): Promise<void> {
-  for (const row of section.rows) {
-    const studentNo =
-      row.studentNo === undefined || row.studentNo === null
-        ? ''
-        : String(row.studentNo).trim();
-    const phone = normalizePhone(row.studentPhone);
-    const newRoomNumber =
-      row.newRoom === undefined || row.newRoom === null
-        ? ''
-        : String(row.newRoom).trim();
-    const student = studentNo
-      ? await studentRepo.findOne({ where: { studentNo } })
-      : phone
-        ? await studentRepo.findOne({ where: { phone } })
-        : null;
-    if (!student) {
-      issues.push(`换宿到「${newRoomNumber}」的学生不存在（缺少手机号/学号），导入时将跳过`);
-      continue;
-    }
-    const active = await occupancyRepo.findOne({
-      where: { studentId: student.id, checkOutDate: IsNull() },
-      order: { id: 'DESC' },
-    });
-    if (!active) {
-      issues.push(`学生「${student.name}」当前没有在住记录，无法换宿`);
-      continue;
-    }
-    const oldRoom = await roomRepo.findOne({ where: { id: active.roomId } });
-    const oldRoomNumber = oldRoom?.roomNumber ?? String(active.roomId);
-    const expectedOldRoom =
-      row.oldRoom === undefined || row.oldRoom === null
-        ? ''
-        : String(row.oldRoom).trim();
-    if (expectedOldRoom && expectedOldRoom !== oldRoomNumber) {
-      issues.push(
-        `学生「${student.name}」原宿舍为「${oldRoomNumber}」，与行内填写的「${expectedOldRoom}」不一致`,
-      );
-    }
-    const targetExists =
-      incomingRoomNumbers.has(newRoomNumber) ||
-      Boolean(await roomRepo.findOne({ where: { roomNumber: newRoomNumber } }));
-    if (!newRoomNumber) {
-      issues.push('存在目标宿舍为空的行，导入时将跳过');
-    } else if (!targetExists) {
-      issues.push(
-        `学生「${student.name}」的目标宿舍「${newRoomNumber}」不存在，且本次导入未包含该宿舍`,
-      );
-    }
-    if (newRoomNumber && oldRoomNumber === newRoomNumber) {
-      issues.push(`学生「${student.name}」的目标宿舍与当前宿舍相同`);
-    }
-  }
-}
diff --git a/apps/server/src/ai-chat/ai-review.service.spec.ts b/apps/server/src/ai-chat/ai-review.service.spec.ts
index a783d44..a2b5a7b 100644
--- a/apps/server/src/ai-chat/ai-review.service.spec.ts
+++ b/apps/server/src/ai-chat/ai-review.service.spec.ts
@@ -1,6 +1,5 @@
-import { BadRequestException, NotFoundException } from '@nestjs/common';
+import { NotFoundException } from '@nestjs/common';
 import { AiReviewService } from './ai-review.service';
-import type { ExcelSheetRows } from './ai-excel-reader.service';
 
 function createService(overrides: Record<string, unknown> = {}) {
   const reviews = {
@@ -19,12 +18,6 @@ function createService(overrides: Record<string, unknown> = {}) {
   return { service, reviews, dataSource };
 }
 
-const baseArgs = {
-  userId: 7,
-  conversationId: 3,
-  assistantMessageId: 12,
-};
-
 const validSchema = {
   title: '新生入住批量导入',
   summary: '来自报名 Excel',
@@ -48,521 +41,6 @@ const validSchema = {
 };
 
 describe('AiReviewService', () => {
-  describe('createReview', () => {
-    function bigSchema(sectionCount: number) {
-      const columns = Array.from({ length: 30 }, (_, i) => ({
-        key: `c${i + 1}`,
-        title: `列${i + 1}`,
-      }));
-      const cell = '中'.repeat(200);
-      const rows = Array.from({ length: 500 }, (_, _i) =>
-        Object.fromEntries(columns.map((column) => [column.key, cell])),
-      );
-      return {
-        title: '大体积导入',
-        summary: null,
-        sections: Array.from({ length: sectionCount }, (_, i) => ({
-          key: (['students', 'rooms', 'transfers'] as const)[i],
-          title: `学生${i + 1}`,
-          kind: 'table',
-          columns,
-          rows,
-          issues: [],
-        })),
-      };
-    }
-
-    it('校验通过的 schema 落库并保留完整 sections', async () => {
-      const { service, reviews } = createService();
-      const review = await service.createReview(baseArgs, validSchema);
-      expect(reviews.create).toHaveBeenCalledWith(
-        expect.objectContaining({
-          userId: 7,
-          conversationId: 3,
-          assistantMessageId: 12,
-          title: '新生入住批量导入',
-          status: 'pending',
-        }),
-      );
-      expect(review.id).toBeTruthy();
-      const sections = JSON.parse(review.sectionsJson) as unknown[];
-      expect(sections).toHaveLength(1);
-      expect((sections[0] as { rows: unknown[] }).rows).toHaveLength(2);
-    });
-
-    it('允许大体积合法预览（远超 256KB），不再因字节上限失败', async () => {
-      const { service } = createService();
-      const review = await service.createReview(baseArgs, bigSchema(1));
-      expect(review.sectionsJson.length).toBeGreaterThan(256 * 1024);
-    });
-
-    it('超过 12MB 总上限的预览仍被拒绝', async () => {
-      const { service } = createService();
-      await expect(service.createReview(baseArgs, bigSchema(2))).rejects.toThrow('预览数据过大');
-    });
-
-    it.each([
-      ['标题缺失', { sections: validSchema.sections }, '预览标题'],
-      ['未知顶层字段', { ...validSchema, hack: 1 }, '未知属性'],
-      ['分表为空', { ...validSchema, sections: [] }, '至少需要一个分表'],
-      [
-        '分表超过20个',
-        {
-          ...validSchema,
-          sections: Array.from({ length: 21 }, (_, i) => ({
-            ...validSchema.sections[0],
-            key: `students_${i}`,
-            title: `分表${i}`,
-          })),
-        },
-        '不能超过 20',
-      ],
-      [
-        '分表类型无法解析',
-        {
-          ...validSchema,
-          sections: [{ ...validSchema.sections[0], key: 'hackers', type: undefined }],
-        },
-        '无法解析业务类型',
-      ],
-      [
-        '显式非法 type 被拒绝',
-        {
-          ...validSchema,
-          sections: [{ ...validSchema.sections[0], type: 'hackers' }],
-        },
-        '分表业务类型不支持',
-      ],
-      [
-        '分表标识重复',
-        {
-          ...validSchema,
-          sections: [validSchema.sections[0], validSchema.sections[0]],
-        },
-        '分表标识重复',
-      ],
-      [
-        'kind 非 table',
-        {
-          ...validSchema,
-          sections: [{ ...validSchema.sections[0], kind: 'chart' }],
-        },
-        '只能是 table',
-      ],
-      [
-        '列缺失',
-        {
-          ...validSchema,
-          sections: [{ ...validSchema.sections[0], columns: [] }],
-        },
-        '至少需要一个列',
-      ],
-      [
-        '行数超限',
-        {
-          ...validSchema,
-          sections: [
-            {
-              ...validSchema.sections[0],
-              rows: Array.from({ length: 501 }, (_, i) => ({ name: `学生${i}` })),
-            },
-          ],
-        },
-        '不能超过 500',
-      ],
-      [
-        '单元格类型非法',
-        {
-          ...validSchema,
-          sections: [
-            {
-              ...validSchema.sections[0],
-              rows: [{ name: '张三', phone: { hack: true } }],
-            },
-          ],
-        },
-        '类型不支持',
-      ],
-    ])('非法 schema 被拒绝：%s', async (_name, schema, messagePart) => {
-      const { service } = createService();
-      await expect(service.createReview(baseArgs, schema)).rejects.toBeInstanceOf(
-        BadRequestException,
-      );
-      await expect(service.createReview(baseArgs, schema)).rejects.toThrow(messagePart);
-    });
-
-    it('行内未知列被剔除，不写入预览', async () => {
-      const { service } = createService();
-      const review = await service.createReview(baseArgs, {
-        ...validSchema,
-        sections: [
-          {
-            ...validSchema.sections[0],
-            rows: [{ name: '张三', phone: '13800138000', __proto_hack: 'x', token: 'abc' }],
-          },
-        ],
-      });
-      const sections = JSON.parse(review.sectionsJson) as Array<{
-        rows: Array<Record<string, unknown>>;
-      }>;
-      expect(sections[0].rows[0]).toEqual({ name: '张三', phone: '13800138000' });
-    });
-
-    it('同一业务类型允许多张 sheet，key 保持唯一', async () => {
-      const { service } = createService();
-      const review = await service.createReview(baseArgs, {
-        title: '多入住 sheet',
-        sections: Array.from({ length: 6 }, (_, i) => ({
-          key: `checkins_${i + 1}`,
-          type: 'checkins',
-          title: `入住${i + 1}`,
-          kind: 'table',
-          sheet: `Sheet${i + 1}`,
-          columns: [{ key: 'name', title: '姓名' }],
-          rows: [{ name: `学生${i + 1}` }],
-          issues: [],
-        })),
-      });
-      const sections = service.parseSections(review.sectionsJson);
-      expect(sections).toHaveLength(6);
-      expect(sections.map((section) => section.type)).toEqual(
-        Array.from({ length: 6 }, () => 'checkins'),
-      );
-      expect(new Set(sections.map((section) => section.key)).size).toBe(6);
-      expect(sections[0].sheet).toBe('Sheet1');
-    });
-
-    it('旧格式 key 带类型前缀时自动解析 type', async () => {
-      const { service } = createService();
-      const review = await service.createReview(baseArgs, {
-        ...validSchema,
-        sections: [
-          {
-            key: 'checkins_girls_4',
-            title: '四人间女',
-            kind: 'table',
-            columns: [{ key: 'name', title: '姓名' }],
-            rows: [{ name: '张三' }],
-            issues: [],
-          },
-        ],
-      });
-      const sections = service.parseSections(review.sectionsJson);
-      expect(sections[0].type).toBe('checkins');
-      expect(sections[0].key).toBe('checkins_girls_4');
-    });
-
-    it('模型常见列名别名归一化为规范键名', async () => {
-      const { service } = createService();
-      const review = await service.createReview(baseArgs, {
-        title: '别名测试',
-        sections: [
-          {
-            key: 'students',
-            title: '学生',
-            kind: 'table',
-            columns: [{ key: 'org', title: '机构' }],
-            rows: [{ org: '东校区' }],
-            issues: [],
-          },
-          {
-            key: 'rooms',
-            title: '宿舍',
-            kind: 'table',
-            columns: [
-              { key: 'roomNo', title: '房间号' },
-              { key: 'capacity', title: '容量' },
-            ],
-            rows: [{ roomNo: '4-401', capacity: 4 }],
-            issues: [],
-          },
-          {
-            key: 'transfers',
-            title: '换宿',
-            kind: 'table',
-            columns: [
-              { key: 'studentNo', title: '学号' },
-              { key: 'fromRoom', title: '原宿舍' },
-              { key: 'toRoom', title: '目标宿舍' },
-              { key: 'date', title: '换宿日期' },
-            ],
-            rows: [
-              {
-                studentNo: 'S001',
-                fromRoom: '1-101',
-                toRoom: '4-401',
-                date: '2026-08-10',
-              },
-            ],
-            issues: [],
-          },
-        ],
-      });
-      const sections = service.parseSections(review.sectionsJson);
-      expect(sections[0].columns[0].key).toBe('organization');
-      expect(sections[0].rows[0]).toEqual({ organization: '东校区' });
-      expect(sections[1].columns[0].key).toBe('roomNumber');
-      expect(sections[1].rows[0]).toEqual({ roomNumber: '4-401', capacity: 4 });
-      expect(sections[2].rows[0]).toEqual({
-        studentNo: 'S001',
-        oldRoom: '1-101',
-        newRoom: '4-401',
-        transferDate: '2026-08-10',
-      });
-    });
-
-    it('预览生成时按数据库校验机构、重复与换宿对象并追加 issues', async () => {
-      const { service } = createService();
-      const review = await service.createReview(baseArgs, {
-        title: '预览校验',
-        sections: [
-          {
-            key: 'students',
-            title: '学生',
-            kind: 'table',
-            columns: [
-              { key: 'name', title: '姓名' },
-              { key: 'phone', title: '手机号' },
-              { key: 'organization', title: '机构' },
-            ],
-            rows: [{ name: '小王', phone: '13800138000', organization: '不存在的机构' }],
-            issues: [],
-          },
-          {
-            key: 'rooms',
-            title: '宿舍',
-            kind: 'table',
-            columns: [{ key: 'roomNumber', title: '房间号' }],
-            rows: [{ roomNumber: '9-901' }],
-            issues: [],
-          },
-          {
-            key: 'transfers',
-            title: '换宿',
-            kind: 'table',
-            columns: [
-              { key: 'studentNo', title: '学号' },
-              { key: 'newRoom', title: '目标宿舍' },
-            ],
-            rows: [{ studentNo: 'S001', newRoom: '9-901' }],
-            issues: [],
-          },
-        ],
-      });
-      const sections = service.parseSections(review.sectionsJson);
-      const studentIssues = sections.find((section) => section.key === 'students')?.issues ?? [];
-      const transferIssues = sections.find((section) => section.key === 'transfers')?.issues ?? [];
-      expect(studentIssues).toEqual(
-        expect.arrayContaining([expect.stringContaining('所属机构无法识别')]),
-      );
-      expect(transferIssues).toEqual(
-        expect.arrayContaining([expect.stringContaining('学生不存在')]),
-      );
-    });
-  });
-
-  describe('buildSectionsFromWorkbook', () => {
-    const workbook: ExcelSheetRows[] = [
-      {
-        name: '学生名单',
-        rows: [
-          ['姓名', '手机号', '学号', '性别', '备注'],
-          ['张三', '13800138000', 'S001', '男', ''],
-          ['李四', '13900139000', 'S002', '女', '新生'],
-          ['', '', '', '', ''],
-        ],
-      },
-      {
-        name: '宿舍安排',
-        rows: [
-          ['宿舍号', '容量', '楼栋', '楼层'],
-          ['3-301', '4', '3号楼', '3'],
-          ['3-302', '6', '3号楼', '3'],
-        ],
-      },
-    ];
-
-    it('按表头自动映射并保留文件原始行数据，未识别列进入 issues', async () => {
-      const { service } = createService();
-      const sections = await service.buildSectionsFromWorkbook(workbook, {
-        sections: [{ key: 'students', title: '学生', sheet: '学生名单' }],
-      });
-      expect(sections).toHaveLength(1);
-      expect(sections[0].rows).toEqual([
-        { name: '张三', phone: '13800138000', studentNo: 'S001', gender: '男' },
-        { name: '李四', phone: '13900139000', studentNo: 'S002', gender: '女' },
-      ]);
-      expect(sections[0].columns.map((column) => column.key)).toEqual([
-        'name',
-        'phone',
-        'studentNo',
-        'gender',
-      ]);
-      expect(sections[0].issues.join('')).toContain('备注');
-    });
-
-    it('支持显式 sourceHeader 列映射与 headerRow', async () => {
-      const { service } = createService();
-      const custom: ExcelSheetRows[] = [
-        {
-          name: 'Sheet1',
-          rows: [['忽略行'], ['学生姓名', '联系方式'], ['王五', '13700137000']],
-        },
-      ];
-      const sections = await service.buildSectionsFromWorkbook(custom, {
-        sections: [
-          {
-            key: 'students',
-            title: '学生',
-            sheet: 'Sheet1',
-            headerRow: 2,
-            columns: [
-              { key: 'name', title: '姓名', sourceHeader: '学生姓名' },
-              { key: 'phone', title: '手机号', sourceHeader: '联系方式' },
-            ],
-          },
-        ],
-      });
-      expect(sections[0].rows).toEqual([{ name: '王五', phone: '13700137000' }]);
-    });
-
-    it('入住记录表头自动映射为规范列名', async () => {
-      const { service } = createService();
-      const custom: ExcelSheetRows[] = [
-        {
-          name: '入住名单',
-          rows: [
-            ['宿舍号', '姓名', '手机号', '入住日期'],
-            ['5-501', '於嘉丽', '13611112222', '2026-08-01'],
-            ['5-502', '刘禹含', '13611113333', '2026/08/02'],
-          ],
-        },
-      ];
-      const sections = await service.buildSectionsFromWorkbook(custom, {
-        sections: [{ key: 'checkins', title: '入住记录', sheet: '入住名单' }],
-      });
-      expect(sections[0].rows).toEqual([
-        { name: '於嘉丽', phone: '13611112222', roomNumber: '5-501', checkInDate: '2026-08-01' },
-        { name: '刘禹含', phone: '13611113333', roomNumber: '5-502', checkInDate: '2026/08/02' },
-      ]);
-    });
-
-    it('英文表头映射为 camelCase 规范键（rooms/transfers/checkins）', async () => {
-      const { service } = createService();
-      const custom: ExcelSheetRows[] = [
-        {
-          name: 'Rooms',
-          rows: [
-            ['RoomNumber', 'RoomType'],
-            ['3-301', '四人间'],
-          ],
-        },
-        {
-          name: 'Transfers',
-          rows: [
-            ['StudentNo', 'StudentPhone', 'OldRoom', 'NewRoom', 'TransferDate'],
-            ['S001', '13800138000', '3-301', '3-302', '2026-08-05'],
-          ],
-        },
-        {
-          name: 'Checkins',
-          rows: [
-            ['StudentNo', 'RoomNumber', 'CheckInDate'],
-            ['S001', '3-301', '2026-08-01'],
-          ],
-        },
-      ];
-      const sections = await service.buildSectionsFromWorkbook(custom, {
-        sections: [
-          { key: 'rooms', title: '宿舍', sheet: 'Rooms' },
-          { key: 'transfers', title: '换宿', sheet: 'Transfers' },
-          { key: 'checkins', title: '入住', sheet: 'Checkins' },
-        ],
-      });
-      const byKey = Object.fromEntries(sections.map((section) => [section.key, section]));
-      expect(byKey.rooms.rows).toEqual([{ roomNumber: '3-301', roomType: '四人间' }]);
-      expect(byKey.transfers.rows).toEqual([
-        {
-          studentNo: 'S001',
-          studentPhone: '13800138000',
-          oldRoom: '3-301',
-          newRoom: '3-302',
-          transferDate: '2026-08-05',
-        },
-      ]);
-      expect(byKey.checkins.rows).toEqual([
-        { studentNo: 'S001', roomNumber: '3-301', checkInDate: '2026-08-01' },
-      ]);
-    });
-
-    it('工作表不存在时抛出明确错误', async () => {
-      const { service } = createService();
-      await expect(
-        service.buildSectionsFromWorkbook(workbook, {
-          sections: [{ key: 'rooms', title: '宿舍', sheet: '不存在的表' }],
-        }),
-      ).rejects.toThrow('找不到工作表');
-    });
-
-    it('分表标识重复或非法时拒绝', async () => {
-      const { service } = createService();
-      await expect(
-        service.buildSectionsFromWorkbook(workbook, {
-          sections: [
-            { key: 'students', title: '学生' },
-            { key: 'students', title: '学生2' },
-          ],
-        }),
-      ).rejects.toThrow('分表标识重复');
-      await expect(
-        service.buildSectionsFromWorkbook(workbook, {
-          sections: [{ key: 'hackers', title: '入侵' }],
-        }),
-      ).rejects.toThrow('无法解析业务类型');
-    });
-
-    it('同一类型多张 sheet 合并生成，并保留各自 key/sheet', async () => {
-      const { service } = createService();
-      const multiSheet: ExcelSheetRows[] = [
-        {
-          name: '四人间女',
-          rows: [
-            ['姓名', '手机号', '宿舍号', '入住日期'],
-            ['张三', '13800138000', '4-401', '2026-08-01'],
-          ],
-        },
-        {
-          name: '四人间男',
-          rows: [
-            ['姓名', '手机号', '宿舍号', '入住日期'],
-            ['李四', '13900139000', '4-402', '2026-08-01'],
-          ],
-        },
-      ];
-      const sections = await service.buildSectionsFromWorkbook(multiSheet, {
-        sections: [
-          {
-            key: 'checkins_girls_4',
-            type: 'checkins',
-            title: '四人间女',
-            sheet: '四人间女',
-          },
-          {
-            key: 'checkins_boys_4',
-            type: 'checkins',
-            title: '四人间男',
-            sheet: '四人间男',
-          },
-        ],
-      });
-      expect(sections).toHaveLength(2);
-      expect(sections.map((section) => [section.key, section.type, section.sheet])).toEqual([
-        ['checkins_girls_4', 'checkins', '四人间女'],
-        ['checkins_boys_4', 'checkins', '四人间男'],
-      ]);
-    });
-  });
-
   describe('findOwnedPending', () => {
     it('只返回本人 pending 预览', async () => {
       const review = { id: 'review-1', userId: 7, status: 'pending' };
@@ -581,23 +59,6 @@ describe('AiReviewService', () => {
     });
   });
 
-  describe('findPendingByAssistantMessage', () => {
-    it('按 assistant 消息返回最新的 pending 预览', async () => {
-      const review = { id: 'review-1', assistantMessageId: 12, status: 'pending' };
-      const { service, reviews } = createService({ findOne: jest.fn().mockResolvedValue(review) });
-      await expect(service.findPendingByAssistantMessage(12)).resolves.toBe(review);
-      expect(reviews.findOne).toHaveBeenCalledWith({
-        where: { assistantMessageId: 12, status: 'pending' },
-        order: { createdAt: 'DESC' },
-      });
-    });
-
-    it('没有待确认预览时返回 null', async () => {
-      const { service } = createService({ findOne: jest.fn().mockResolvedValue(null) });
-      await expect(service.findPendingByAssistantMessage(12)).resolves.toBeNull();
-    });
-  });
-
   describe('serialize', () => {
     it('回传前端所需结构', () => {
       const { service } = createService();
diff --git a/apps/server/src/ai-chat/ai-review.service.ts b/apps/server/src/ai-chat/ai-review.service.ts
index b4f40c8..0effea4 100644
--- a/apps/server/src/ai-chat/ai-review.service.ts
+++ b/apps/server/src/ai-chat/ai-review.service.ts
@@ -1,27 +1,16 @@
-// aislop-ignore-file: duplicate-block -- 导入校验循环结构相似，逻辑已复用现有助手
-import {
-  BadRequestException,
-  Injectable,
-  NotFoundException,
-} from '@nestjs/common';
+import { Injectable, NotFoundException } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
-import { DataSource, In, Repository } from 'typeorm';
-import { uuidV7 } from '../common/uuid-v7';
+import { DataSource, Repository } from 'typeorm';
 import { AiReview } from './entities/ai-review.entity';
 import type {
   AiReviewSection,
   AiReviewSectionType,
 } from './entities/ai-review.entity';
-import type { ExcelSheetRows } from './ai-excel-reader.service';
 import {
   AiReviewStepSubmitResult,
   AiReviewSubmitResult,
-  MAX_SECTIONS_JSON_BYTES,
-  withInitialSectionState,
 } from './ai-review.shared';
-import { buildSectionsFromWorkbookAsync, parseSections } from './ai-review.workbook';
-import { validateSchema } from './ai-review.validation';
-import { enrichWithIssues } from './ai-review.enrich';
+import { parseSections } from './ai-review.workbook';
 import {
   submitAll,
   submitGroup,
@@ -30,14 +19,11 @@ import {
 import type { AiReviewSubmitContext } from './ai-review.submit';
 
 /**
- * A2UI batch-import review lifecycle.
+ * A2UI batch-import review confirmation lifecycle.
  *
- * The model parses an uploaded workbook (students / rooms / transfers),
- * calls `render_review`, and the user inspects per-table preview cards
- * before confirming. Confirmation runs each section in its own
- * transaction in dependency order: students → rooms → transfers →
- * checkins. Per-row problems are collected as issues and the row is
- * skipped instead of failing the whole import.
+ * Existing previews can be confirmed per section, per group, or all at
+ * once; each section is imported in its own transaction in dependency
+ * order: students → rooms → transfers → checkins.
  */
 @Injectable()
 export class AiReviewService {
@@ -51,38 +37,6 @@ export class AiReviewService {
     return { reviews: this.reviews, dataSource: this.dataSource };
   }
 
-  /**
-   * Validate `render_review` arguments and persist a pending review.
-   * Throws BadRequestException when the schema is unsafe/invalid.
-   */
-  async createReview(
-    input: { userId: number; conversationId: number; assistantMessageId: number },
-    rawArgs: unknown,
-  ): Promise<AiReview> {
-    const schema = validateSchema(rawArgs);
-    const sections = (await enrichWithIssues(this.dataSource, schema.sections)).map(
-      withInitialSectionState,
-    );
-    const sectionsJson = JSON.stringify(sections);
-    if (Buffer.byteLength(sectionsJson, 'utf8') > MAX_SECTIONS_JSON_BYTES) {
-      throw new BadRequestException('预览数据过大');
-    }
-    return this.reviews.save(
-      this.reviews.create({
-        id: uuidV7(),
-        userId: input.userId,
-        conversationId: input.conversationId,
-        assistantMessageId: input.assistantMessageId,
-        title: schema.title,
-        summary: schema.summary,
-        sectionsJson,
-        status: 'pending',
-        resultSummary: null,
-        submittedAt: null,
-      }),
-    );
-  }
-
   async findOwnedPending(reviewId: string, userId: number): Promise<AiReview> {
     const review = await this.reviews.findOne({
       where: { id: reviewId, userId, status: 'pending' },
@@ -91,26 +45,6 @@ export class AiReviewService {
     return review;
   }
 
-  /**
-   * Mark every other pending review in the same conversation as expired.
-   * Called after a new render_review is successfully created so older cards
-   * are superseded instead of silently staying confirmable.
-   */
-  async expirePreviousReviews(
-    userId: number,
-    conversationId: number,
-    exceptReviewId: string,
-  ): Promise<AiReview[]> {
-    const pending = await this.reviews.find({
-      where: { userId, conversationId, status: 'pending' },
-    });
-    const expired = pending.filter((review) => review.id !== exceptReviewId);
-    if (expired.length === 0) return [];
-    const ids = expired.map((review) => review.id);
-    await this.reviews.update({ id: In(ids) }, { status: 'expired' });
-    return expired.map((review) => ({ ...review, status: 'expired' as const }));
-  }
-
   /**
    * Return a review owned by the user regardless of overall status.
    * Used by step confirmation so an already-completed card can respond
@@ -124,30 +58,7 @@ export class AiReviewService {
     return review;
   }
 
-  /**
-   * Return the newest pending review bound to an assistant message, if any.
-   * Used to guarantee at most one batch-import preview card per message.
-   */
-  async findPendingByAssistantMessage(assistantMessageId: number): Promise<AiReview | null> {
-    return this.reviews.findOne({
-      where: { assistantMessageId, status: 'pending' },
-      order: { createdAt: 'DESC' },
-    });
-  }
-
-  /**
-   * 服务端直接解析上传的 Excel 生成审阅分表：行数据来自文件原文，
-   * 不经过模型转抄，避免漏行/错值。表头按内置字典自动映射，
-   * 模型可通过 sections[].columns[].sourceHeader 显式指定映射。
-   */
-  async buildSectionsFromWorkbook(
-    sheets: ExcelSheetRows[],
-    rawArgs: unknown,
-  ): Promise<AiReviewSection[]> {
-    return await buildSectionsFromWorkbookAsync(sheets, rawArgs);
-  }
-
-  /** Public shape sent via `ui.review` SSE and mirrored into message metadata. */
+  /** Public shape used by message metadata and the unified `ui.artifact` payload. */
   serialize(review: AiReview): Record<string, unknown> {
     return {
       id: review.id,
diff --git a/apps/server/src/ai-chat/ai-review.shared.ts b/apps/server/src/ai-chat/ai-review.shared.ts
index 615920e..f917ba6 100644
--- a/apps/server/src/ai-chat/ai-review.shared.ts
+++ b/apps/server/src/ai-chat/ai-review.shared.ts
@@ -5,25 +5,12 @@ import type {
   AiReviewSectionType,
 } from './entities/ai-review.entity';
 
-export const MAX_TITLE = 50;
-export const MAX_SUMMARY = 500;
-export const MAX_SECTIONS = 20;
-export const MAX_SECTION_TITLE = 50;
-export const MAX_COLUMNS = 30;
-export const MAX_COLUMN_KEY = 50;
-export const MAX_COLUMN_TITLE = 50;
-export const MAX_ROWS = 500;
-export const MAX_CELL_LENGTH = 200;
 export const MAX_ISSUES = 50;
-export const MAX_ISSUE_LENGTH = 200;
-export const MAX_SECTIONS_JSON_BYTES = 12 * 1024 * 1024;
-export const MAX_SECTION_JSON_BYTES = Math.floor(MAX_SECTIONS_JSON_BYTES / MAX_SECTIONS);
 export const MAX_CAPACITY = 200;
 
-export const DATE_RE = /^\d{4}-\d{2}-\d{2}$/;
-export const COLUMN_KEY_RE = /^[a-zA-Z0-9_]{1,50}$/;
+const DATE_RE = /^\d{4}-\d{2}-\d{2}$/;
 export const SECTION_KEY_RE = /^[a-zA-Z0-9_]{1,50}$/;
-export const SECTION_TYPES = new Set<AiReviewSectionType>([
+const SECTION_TYPES = new Set<AiReviewSectionType>([
   'students',
   'rooms',
   'transfers',
@@ -36,171 +23,6 @@ export const SECTION_DEPENDENCIES: Record<AiReviewSectionType, AiReviewSectionTy
   transfers: ['students', 'rooms'],
   checkins: [],
 };
-export const SCHEMA_KEYS = new Set(['title', 'summary', 'sections']);
-export const SECTION_KEYS_ALLOWED = new Set([
-  'key',
-  'type',
-  'title',
-  'kind',
-  'sheet',
-  'columns',
-  'rows',
-  'issues',
-]);
-export const COLUMN_KEYS_ALLOWED = new Set(['key', 'title']);
-
-/**
- * Column-key aliases the model may produce when parsing workbooks.
- * Keys are normalized to canonical names per section so the import
- * logic only deals with one vocabulary.
- */
-export const SECTION_ALIASES: Record<AiReviewSectionType, Record<string, string>> = {
-  students: {
-    org: 'organization',
-    organizationName: 'organization',
-    orgName: 'organization',
-  },
-  rooms: {
-    roomNo: 'roomNumber',
-    number: 'roomNumber',
-  },
-  transfers: {
-    fromRoom: 'oldRoom',
-    currentRoom: 'oldRoom',
-    sourceRoom: 'oldRoom',
-    toRoom: 'newRoom',
-    targetRoom: 'newRoom',
-    destRoom: 'newRoom',
-    date: 'transferDate',
-    changeDate: 'transferDate',
-    moveDate: 'transferDate',
-    mobile: 'studentPhone',
-    phone: 'studentPhone',
-  },
-  checkins: {
-    studentName: 'name',
-    mobile: 'phone',
-    roomNo: 'roomNumber',
-    room: 'roomNumber',
-    date: 'checkInDate',
-    inDate: 'checkInDate',
-    checkinDate: 'checkInDate',
-    outDate: 'checkOutDate',
-    checkoutDate: 'checkOutDate',
-  },
-};
-
-/**
- * Excel 表头 → 规范列名。与 SECTION_ALIASES 合并使用；
- * 键会被归一化（去空格/下划线/大小写），因此同时覆盖中文与英文写法。
- */
-export const SECTION_HEADER_ALIASES: Record<AiReviewSectionType, Record<string, string>> = {
-  students: {
-    姓名: 'name',
-    学生姓名: 'name',
-    name: 'name',
-    手机号: 'phone',
-    电话: 'phone',
-    联系电话: 'phone',
-    phone: 'phone',
-    mobile: 'phone',
-    学号: 'studentNo',
-    学生编号: 'studentNo',
-    studentNo: 'studentNo',
-    studentno: 'studentNo',
-    性别: 'gender',
-    gender: 'gender',
-    机构: 'organization',
-    所属机构: 'organization',
-    校区: 'organization',
-    组织: 'organization',
-    organization: 'organization',
-  },
-  rooms: {
-    房间号: 'roomNumber',
-    宿舍号: 'roomNumber',
-    房号: 'roomNumber',
-    roomNumber: 'roomNumber',
-    roomnumber: 'roomNumber',
-    容量: 'capacity',
-    床位数: 'capacity',
-    床位: 'capacity',
-    capacity: 'capacity',
-    楼栋: 'building',
-    楼号: 'building',
-    building: 'building',
-    楼层: 'floor',
-    floor: 'floor',
-    房型: 'roomType',
-    房间类型: 'roomType',
-    roomType: 'roomType',
-  },
-  transfers: {
-    学号: 'studentNo',
-    studentNo: 'studentNo',
-    studentno: 'studentNo',
-    手机号: 'studentPhone',
-    学生手机号: 'studentPhone',
-    电话: 'studentPhone',
-    phone: 'studentPhone',
-    studentPhone: 'studentPhone',
-    原宿舍: 'oldRoom',
-    原房间: 'oldRoom',
-    oldRoom: 'oldRoom',
-    目标宿舍: 'newRoom',
-    新宿舍: 'newRoom',
-    newRoom: 'newRoom',
-    换宿日期: 'transferDate',
-    日期: 'transferDate',
-    transferDate: 'transferDate',
-  },
-  checkins: {
-    姓名: 'name',
-    学生姓名: 'name',
-    name: 'name',
-    手机号: 'phone',
-    电话: 'phone',
-    phone: 'phone',
-    mobile: 'phone',
-    学号: 'studentNo',
-    studentNo: 'studentNo',
-    宿舍号: 'roomNumber',
-    房间号: 'roomNumber',
-    roomNumber: 'roomNumber',
-    楼栋: 'building',
-    building: 'building',
-    性别: 'gender',
-    gender: 'gender',
-    入住时间: 'checkInDate',
-    入住日期: 'checkInDate',
-    checkInDate: 'checkInDate',
-    计费起始日: 'billingStartDate',
-    计费开始日: 'billingStartDate',
-    退宿日期: 'checkOutDate',
-    退宿时间: 'checkOutDate',
-    离宿时间: 'checkOutDate',
-    入住类型: 'stayType',
-    住宿类型: 'stayType',
-  },
-};
-
-export const SECTION_CANONICAL_KEYS: Record<AiReviewSectionType, Set<string>> = {
-  students: new Set(['name', 'phone', 'studentNo', 'gender', 'organization']),
-  rooms: new Set(['roomNumber', 'capacity', 'building', 'floor', 'roomType']),
-  transfers: new Set(['studentNo', 'studentPhone', 'oldRoom', 'newRoom', 'transferDate']),
-  checkins: new Set([
-    'name',
-    'phone',
-    'studentNo',
-    'roomNumber',
-    'checkInDate',
-    'billingStartDate',
-    'checkOutDate',
-    'gender',
-    'building',
-    'stayType',
-  ]),
-};
 
 export interface AiReviewSubmitResult {
   students: { created: number; skipped: number; issues: string[] };
@@ -214,47 +36,13 @@ export type AiReviewSectionResult =
   | { created: number; skipped: number; issues: string[] }
   | { completed: number; skipped: number; issues: string[] };
 
-export interface ValidatedReviewSchema {
-  title: string;
-  summary: string | null;
-  sections: AiReviewSection[];
-}
-
 export interface AiReviewStepSubmitResult {
   review: AiReview;
   result: AiReviewSectionResult;
   message: string;
 }
 
-export function isPlainRecord(value: unknown): value is Record<string, unknown> {
-  return Boolean(value) && typeof value === 'object' && !Array.isArray(value);
-}
-
-export function requireString(
-  value: unknown,
-  label: string,
-  max: number,
-  optional = false,
-): string {
-  if (value === undefined || value === null) {
-    if (optional) return '';
-    throw new BadRequestException(`${label}不能为空`);
-  }
-  if (typeof value !== 'string' || !value.trim()) {
-    throw new BadRequestException(`${label}必须是字符串`);
-  }
-  const trimmed = value.trim();
-  if (trimmed.length > max) {
-    throw new BadRequestException(`${label}长度不能超过 ${max}`);
-  }
-  return trimmed;
-}
-
-export function assertKeys(raw: Record<string, unknown>, allowed: Set<string>, label: string): void {
-  for (const key of Object.keys(raw)) {
-    if (!allowed.has(key)) throw new BadRequestException(`${label}包含未知属性: ${key}`);
-  }
-}
+export { isPlainRecord } from './ai-validation';
 
 export function toDateString(value: unknown): string | null {
   if (typeof value === 'string' && DATE_RE.test(value.trim())) return value.trim();
@@ -267,7 +55,7 @@ export function normalizePhone(value: unknown): string | null {
   return /^1[3-9]\d{9}$/.test(phone) ? phone : null;
 }
 
-export function isSectionType(value: unknown): value is AiReviewSectionType {
+function isSectionType(value: unknown): value is AiReviewSectionType {
   return typeof value === 'string' && SECTION_TYPES.has(value as AiReviewSectionType);
 }
 
@@ -317,12 +105,3 @@ export function sectionResultMessage(
   }
   return `成功入住 ${(result as { completed: number }).completed} 条，跳过 ${result.skipped} 条`;
 }
-
-export function withInitialSectionState(section: AiReviewSection): AiReviewSection {
-  return {
-    ...section,
-    status: 'pending',
-    resultSummary: null,
-    submittedAt: null,
-  };
-}
diff --git a/apps/server/src/ai-chat/ai-review.validation.ts b/apps/server/src/ai-chat/ai-review.validation.ts
deleted file mode 100644
index af8c96e..0000000
--- a/apps/server/src/ai-chat/ai-review.validation.ts
+++ /dev/null
@@ -1,165 +0,0 @@
-import { BadRequestException } from '@nestjs/common';
-import type {
-  AiReviewRow,
-  AiReviewSection,
-  AiReviewSectionType,
-} from './entities/ai-review.entity';
-import {
-  assertKeys,
-  COLUMN_KEYS_ALLOWED,
-  COLUMN_KEY_RE,
-  isPlainRecord,
-  MAX_CELL_LENGTH,
-  MAX_COLUMNS,
-  MAX_COLUMN_KEY,
-  MAX_COLUMN_TITLE,
-  MAX_ISSUES,
-  MAX_ISSUE_LENGTH,
-  MAX_ROWS,
-  MAX_SECTIONS,
-  MAX_SECTION_TITLE,
-  MAX_SUMMARY,
-  MAX_TITLE,
-  normalizeSectionType,
-  requireString,
-  SCHEMA_KEYS,
-  SECTION_ALIASES,
-  SECTION_KEYS_ALLOWED,
-  SECTION_KEY_RE,
-  ValidatedReviewSchema,
-} from './ai-review.shared';
-
-export function validateSchema(rawArgs: unknown): ValidatedReviewSchema {
-  if (!isPlainRecord(rawArgs)) throw new BadRequestException('导入预览参数必须是对象');
-  assertKeys(rawArgs, SCHEMA_KEYS, '导入预览');
-  const title = requireString(rawArgs.title, '预览标题', MAX_TITLE);
-  const summary = requireString(rawArgs.summary, '预览说明', MAX_SUMMARY, true) || null;
-  if (!Array.isArray(rawArgs.sections) || rawArgs.sections.length === 0) {
-    throw new BadRequestException('导入预览至少需要一个分表');
-  }
-  if (rawArgs.sections.length > MAX_SECTIONS) {
-    throw new BadRequestException(`分表数量不能超过 ${MAX_SECTIONS}`);
-  }
-  const seenKeys = new Set<string>();
-  const sections = rawArgs.sections.map((item, index) =>
-    validateSection(item, index, seenKeys),
-  );
-  return { title, summary, sections };
-}
-
-function validateSection(
-  raw: unknown,
-  index: number,
-  seenKeys: Set<string>,
-): AiReviewSection {
-  if (!isPlainRecord(raw)) throw new BadRequestException(`第 ${index + 1} 个分表格式无效`);
-  assertKeys(raw, SECTION_KEYS_ALLOWED, `第 ${index + 1} 个分表`);
-  const key = requireString(raw.key, `第 ${index + 1} 个分表标识`, MAX_COLUMN_KEY);
-  if (!SECTION_KEY_RE.test(key)) {
-    throw new BadRequestException(
-      `分表标识 ${key} 只能包含字母、数字、下划线（≤50）`,
-    );
-  }
-  const type = normalizeSectionType(key, raw.type);
-  if (seenKeys.has(key)) throw new BadRequestException(`分表标识重复: ${key}`);
-  seenKeys.add(key);
-  const title = requireString(raw.title, `分表「${key}」标题`, MAX_SECTION_TITLE);
-  if (raw.kind !== 'table') throw new BadRequestException(`分表「${key}」的 kind 只能是 table`);
-  const sheet =
-    raw.sheet === undefined || raw.sheet === null
-      ? undefined
-      : requireString(raw.sheet, `分表「${key}」工作表`, MAX_SECTION_TITLE);
-  if (!Array.isArray(raw.columns) || raw.columns.length === 0) {
-    throw new BadRequestException(`分表「${key}」至少需要一个列`);
-  }
-  if (raw.columns.length > MAX_COLUMNS) {
-    throw new BadRequestException(`分表「${key}」的列数不能超过 ${MAX_COLUMNS}`);
-  }
-  const seenColumns = new Set<string>();
-  const aliases = SECTION_ALIASES[type] ?? {};
-  const columns = raw.columns.map((column, columnIndex) => {
-    if (!isPlainRecord(column)) {
-      throw new BadRequestException(`分表「${key}」第 ${columnIndex + 1} 列格式无效`);
-    }
-    assertKeys(column, COLUMN_KEYS_ALLOWED, `分表「${key}」第 ${columnIndex + 1} 列`);
-    const rawKey = requireString(column.key, `分表「${key}」列名`, MAX_COLUMN_KEY);
-    const columnKey = aliases[rawKey] ?? rawKey;
-    if (!COLUMN_KEY_RE.test(columnKey)) {
-      throw new BadRequestException(`分表「${key}」列名 ${columnKey} 只能包含字母、数字、下划线`);
-    }
-    if (seenColumns.has(columnKey)) {
-      throw new BadRequestException(`分表「${key}」列名重复: ${columnKey}`);
-    }
-    seenColumns.add(columnKey);
-    const columnTitle = requireString(column.title, `分表「${key}」列「${columnKey}」标题`, MAX_COLUMN_TITLE);
-    return { key: columnKey, title: columnTitle };
-  });
-  if (!Array.isArray(raw.rows) || raw.rows.length > MAX_ROWS) {
-    throw new BadRequestException(`分表「${key}」的行数不能超过 ${MAX_ROWS}`);
-  }
-  const rows = raw.rows.map((row, rowIndex) =>
-    validateRow(row, type, rowIndex, new Set(seenColumns), aliases),
-  );
-  let issues: string[] = [];
-  if (raw.issues !== undefined) {
-    if (!Array.isArray(raw.issues) || raw.issues.length > MAX_ISSUES) {
-      throw new BadRequestException(`分表「${key}」的问题数不能超过 ${MAX_ISSUES}`);
-    }
-    issues = raw.issues.map((issue) =>
-      requireString(issue, `分表「${key}」的问题`, MAX_ISSUE_LENGTH),
-    );
-  }
-  return {
-    key,
-    type,
-    title,
-    kind: 'table',
-    ...(sheet ? { sheet } : {}),
-    columns,
-    rows,
-    issues,
-  };
-}
-
-function validateRow(
-  raw: unknown,
-  sectionType: AiReviewSectionType,
-  index: number,
-  knownColumns: Set<string>,
-  aliases: Record<string, string>,
-): AiReviewRow {
-  if (!isPlainRecord(raw)) {
-    throw new BadRequestException(`分表「${sectionType}」第 ${index + 1} 行格式无效`);
-  }
-  const row: AiReviewRow = {};
-  for (const [key, value] of Object.entries(raw)) {
-    const canonicalKey = aliases[key] ?? key;
-    if (!knownColumns.has(canonicalKey)) continue;
-    if (value === null || typeof value === 'boolean') {
-      row[canonicalKey] = value;
-      continue;
-    }
-    if (typeof value === 'number') {
-      if (!Number.isFinite(value)) {
-        throw new BadRequestException(
-          `分表「${sectionType}」第 ${index + 1} 行 ${key} 必须是有效数字`,
-        );
-      }
-      row[canonicalKey] = value;
-      continue;
-    }
-    if (typeof value === 'string') {
-      if (value.length > MAX_CELL_LENGTH) {
-        throw new BadRequestException(
-          `分表「${sectionType}」第 ${index + 1} 行 ${key} 长度超过 ${MAX_CELL_LENGTH}`,
-        );
-      }
-      row[canonicalKey] = value;
-      continue;
-    }
-    throw new BadRequestException(
-      `分表「${sectionType}」第 ${index + 1} 行 ${key} 类型不支持`,
-    );
-  }
-  return row;
-}
diff --git a/apps/server/src/ai-chat/ai-review.workbook.ts b/apps/server/src/ai-chat/ai-review.workbook.ts
index 49e84dc..fd700ff 100644
--- a/apps/server/src/ai-chat/ai-review.workbook.ts
+++ b/apps/server/src/ai-chat/ai-review.workbook.ts
@@ -1,220 +1,6 @@
 import { BadRequestException } from '@nestjs/common';
-import type {
-  AiReviewColumn,
-  AiReviewRow,
-  AiReviewSection,
-  AiReviewSectionType,
-} from './entities/ai-review.entity';
-import type { ExcelSheetRows } from './ai-excel-reader.service';
-import {
-  isPlainRecord,
-  MAX_CELL_LENGTH,
-  MAX_COLUMN_TITLE,
-  MAX_ISSUES,
-  MAX_ROWS,
-  MAX_SECTIONS,
-  MAX_SECTION_JSON_BYTES,
-  MAX_SECTION_TITLE,
-  normalizeSectionType,
-  requireString,
-  SECTION_ALIASES,
-  SECTION_CANONICAL_KEYS,
-  SECTION_HEADER_ALIASES,
-  SECTION_KEY_RE,
-  sectionStatus,
-} from './ai-review.shared';
-
-export function buildSectionsFromWorkbook(
-  sheets: ExcelSheetRows[],
-  rawArgs: unknown,
-): AiReviewSection[] {
-  if (!isPlainRecord(rawArgs)) throw new BadRequestException('导入预览参数必须是对象');
-  const rawSections = rawArgs.sections;
-  if (!Array.isArray(rawSections) || rawSections.length === 0) {
-    throw new BadRequestException('至少需要一个分表');
-  }
-  if (rawSections.length > MAX_SECTIONS) {
-    throw new BadRequestException(`分表不能超过 ${MAX_SECTIONS} 个`);
-  }
-
-  const seen = new Set<string>();
-  const sections: AiReviewSection[] = [];
-  for (let index = 0; index < rawSections.length; index += 1) {
-    const raw: unknown = rawSections[index];
-    if (!isPlainRecord(raw) || typeof raw.key !== 'string') {
-      throw new BadRequestException(`第 ${index + 1} 个分表格式无效`);
-    }
-    const key = raw.key.trim();
-    if (!SECTION_KEY_RE.test(key)) {
-      throw new BadRequestException(`分表标识 ${key} 只能包含字母、数字、下划线（≤50）`);
-    }
-    const type = normalizeSectionType(key, raw.type);
-    if (seen.has(key)) throw new BadRequestException(`分表标识重复: ${key}`);
-    seen.add(key);
-
-    const title = requireString(raw.title, '分表标题', MAX_SECTION_TITLE);
-    const rawSheet = raw.sheet;
-    const sheetName =
-      rawSheet === undefined || rawSheet === null
-        ? undefined
-        : typeof rawSheet === 'string'
-          ? rawSheet.trim()
-          : (JSON.stringify(rawSheet) ?? '').trim();
-    const headerRow = raw.headerRow === undefined || raw.headerRow === null ? 1 : Number(raw.headerRow);
-    if (!Number.isInteger(headerRow) || headerRow < 1 || headerRow > 1000) {
-      throw new BadRequestException(`分表 ${key} 的 headerRow 无效`);
-    }
-
-    const sheet = sheetName
-      ? (sheets.find((item) => item.name === sheetName) ??
-        sheets.find((item) => item.name.includes(sheetName)))
-      : sheets[0];
-    if (!sheet) {
-      throw new BadRequestException(`找不到工作表「${sheetName}」`);
-    }
-
-    sections.push(
-      buildSectionFromSheet(key, type, title, sheet.name, sheet, headerRow, raw.columns),
-    );
-  }
-  return sections;
-}
-
-export async function buildSectionsFromWorkbookAsync(
-  sheets: ExcelSheetRows[],
-  rawArgs: unknown,
-): Promise<AiReviewSection[]> {
-  return await Promise.resolve(buildSectionsFromWorkbook(sheets, rawArgs));
-}
-
-function buildSectionFromSheet(
-  key: string,
-  type: AiReviewSectionType,
-  title: string,
-  sheetName: string,
-  sheet: ExcelSheetRows,
-  headerRow: number,
-  rawColumns: unknown,
-): AiReviewSection {
-  const issues: string[] = [];
-  const aliasMap = buildHeaderAliasMap(type);
-  if (sheet.rows.length < headerRow) {
-    return {
-      key,
-      type,
-      title,
-      kind: 'table',
-      sheet: sheetName,
-      columns: [],
-      rows: [],
-      issues: [`工作表「${sheet.name}」没有第 ${headerRow} 行表头`],
-    };
-  }
-
-  const explicit = new Map<string, string>();
-  if (rawColumns !== undefined) {
-    if (!Array.isArray(rawColumns)) {
-      throw new BadRequestException(`分表 ${key} 的 columns 无效`);
-    }
-    for (const column of rawColumns) {
-      if (!isPlainRecord(column) || typeof column.key !== 'string') {
-        throw new BadRequestException(`分表 ${key} 的列定义无效`);
-      }
-      const canonical = aliasMap.get(normalizeHeader(column.key));
-      if (!canonical || !SECTION_CANONICAL_KEYS[type].has(canonical)) {
-        throw new BadRequestException(`分表 ${key} 的列标识无效: ${column.key}`);
-      }
-      if (typeof column.sourceHeader === 'string' && column.sourceHeader.trim()) {
-        explicit.set(normalizeHeader(column.sourceHeader), canonical);
-      } else {
-        explicit.set(normalizeHeader(column.key), canonical);
-      }
-    }
-  }
-
-  const headerCells = sheet.rows[headerRow - 1];
-  const dataRows = sheet.rows.slice(headerRow);
-  const mapping = new Map<number, string>();
-  const columns: AiReviewColumn[] = [];
-
-  for (let colIndex = 0; colIndex < headerCells.length; colIndex += 1) {
-    const header = String(headerCells[colIndex] ?? '').trim();
-    if (!header) continue;
-    const canonical =
-      explicit.get(normalizeHeader(header)) ?? aliasMap.get(normalizeHeader(header));
-    if (!canonical) {
-      issues.push(`列「${header}」未识别，已忽略`);
-      continue;
-    }
-    if (Array.from(mapping.values()).includes(canonical)) continue;
-    mapping.set(colIndex, canonical);
-    columns.push({ key: canonical, title: header.slice(0, MAX_COLUMN_TITLE) });
-  }
-
-  if (columns.length === 0) {
-    return {
-      key,
-      type,
-      title,
-      kind: 'table',
-      sheet: sheetName,
-      columns: [],
-      rows: [],
-      issues: [...issues, '没有识别到可导入的列'],
-    };
-  }
-
-  const rows: AiReviewRow[] = [];
-  let totalBytes = 0;
-  for (const cells of dataRows) {
-    const row: AiReviewRow = {};
-    for (const [colIndex, canonical] of mapping) {
-      const raw = cells[colIndex];
-      const text = raw === undefined || raw === null ? '' : String(raw).trim();
-      if (!text) continue;
-      row[canonical] = text.length > MAX_CELL_LENGTH ? text.slice(0, MAX_CELL_LENGTH) : text;
-    }
-    if (Object.keys(row).length === 0) continue;
-    const rowBytes = Buffer.byteLength(JSON.stringify(row), 'utf8');
-    if (totalBytes + rowBytes > MAX_SECTION_JSON_BYTES) {
-      issues.push(`「${title}」数据量过大，仅保留前 ${rows.length} 行`);
-      break;
-    }
-    totalBytes += rowBytes;
-    rows.push(row);
-    if (rows.length >= MAX_ROWS) {
-      issues.push(`「${title}」超过 ${MAX_ROWS} 行，仅保留前 ${MAX_ROWS} 行`);
-      break;
-    }
-  }
-
-  return {
-    key,
-    type,
-    title,
-    kind: 'table',
-    sheet: sheetName,
-    columns,
-    rows,
-    issues: [...new Set(issues)].slice(-MAX_ISSUES),
-  };
-}
-
-function buildHeaderAliasMap(key: AiReviewSectionType): Map<string, string> {
-  const merged: Record<string, string> = {
-    ...SECTION_HEADER_ALIASES[key],
-    ...SECTION_ALIASES[key],
-  };
-  const map = new Map<string, string>();
-  for (const [header, canonical] of Object.entries(merged)) {
-    map.set(normalizeHeader(header), canonical);
-  }
-  return map;
-}
-
-function normalizeHeader(value: string): string {
-  return value.trim().toLowerCase().replace(/[\s_-]+/g, '');
-}
+import type { AiReviewSection } from './entities/ai-review.entity';
+import { isPlainRecord, normalizeSectionType, sectionStatus } from './ai-review.shared';
 
 export function parseSections(sectionsJson: string): AiReviewSection[] {
   let parsed: unknown;
diff --git a/apps/server/src/ai-chat/ai-validation.ts b/apps/server/src/ai-chat/ai-validation.ts
new file mode 100644
index 0000000..6bffb1a
--- /dev/null
+++ b/apps/server/src/ai-chat/ai-validation.ts
@@ -0,0 +1,31 @@
+import { BadRequestException } from '@nestjs/common';
+
+export function isPlainRecord(value: unknown): value is Record<string, unknown> {
+  return Boolean(value) && typeof value === 'object' && !Array.isArray(value);
+}
+
+export function requireString(
+  value: unknown,
+  label: string,
+  max: number,
+  optional = false,
+): string {
+  if (value === undefined || value === null) {
+    if (optional) return '';
+    throw new BadRequestException(`${label}不能为空`);
+  }
+  if (typeof value !== 'string' || !value.trim()) {
+    throw new BadRequestException(`${label}必须是字符串`);
+  }
+  const trimmed = value.trim();
+  if (trimmed.length > max) {
+    throw new BadRequestException(`${label}长度不能超过 ${max}`);
+  }
+  return trimmed;
+}
+
+export function assertKeys(raw: Record<string, unknown>, allowed: Set<string>, label: string): void {
+  for (const key of Object.keys(raw)) {
+    if (!allowed.has(key)) throw new BadRequestException(`${label}包含未知属性: ${key}`);
+  }
+}