feat(conversation): add device tracking and optimize admin-client build

## Device Tracking (conversation-service)
- Add DeviceInfoDto class for validating device information
- Extract client IP from X-Forwarded-For and X-Real-IP headers
- Capture User-Agent header automatically on conversation creation
- Support optional fingerprint and region from client
- Pass deviceInfo through service layer to entity for persistence

Files changed:
- conversation.controller.ts: Add extractClientIp() method and header capture
- conversation.dto.ts: Add DeviceInfoDto with validation decorators
- conversation.service.ts: Update CreateConversationParams interface

## Build Optimization (admin-client)
- Implement code splitting via Rollup manualChunks
- Separate vendor libraries into cacheable chunks:
  - vendor-react: react, react-dom, react-router-dom (160KB)
  - vendor-antd: antd, @ant-design/icons (1013KB)
  - vendor-charts: recharts (409KB)
  - vendor-data: @tanstack/react-query, axios, zustand (82KB)
- Main bundle reduced from 1732KB to 61KB (96% reduction)
- Set chunkSizeWarningLimit to 1100KB for antd

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/admin-client/vite.config.ts

@@ -16,5 +16,20 @@ export default defineConfig({
   build: {
     outDir: 'dist',
     sourcemap: true,
+    chunkSizeWarningLimit: 1100, // antd is ~1MB, this is expected
+    rollupOptions: {
+      output: {
+        manualChunks: {
+          // React core
+          'vendor-react': ['react', 'react-dom', 'react-router-dom'],
+          // Ant Design UI library
+          'vendor-antd': ['antd', '@ant-design/icons'],
+          // Charts
+          'vendor-charts': ['recharts'],
+          // Data fetching & state
+          'vendor-data': ['@tanstack/react-query', 'axios', 'zustand'],
+        },
+      },
+    },
   },
 });

packages/services/conversation-service/src/adapters/inbound/conversation.controller.ts

@@ -16,6 +16,21 @@ import { CreateConversationDto, SendMessageDto } from '../../application/dtos/co
 export class ConversationController {
   constructor(private conversationService: ConversationService) {}
 
+  /**
+   * Extract client IP from headers (supports proxies)
+   */
+  private extractClientIp(
+    xForwardedFor?: string,
+    xRealIp?: string,
+  ): string | undefined {
+    // X-Forwarded-For can contain multiple IPs, take the first one (original client)
+    if (xForwardedFor) {
+      const ips = xForwardedFor.split(',').map((ip) => ip.trim());
+      return ips[0] || undefined;
+    }
+    return xRealIp || undefined;
+  }
+
   /**
    * Create a new conversation
    */
@@ -23,11 +38,24 @@ export class ConversationController {
   @HttpCode(HttpStatus.CREATED)
   async createConversation(
     @Headers('x-user-id') userId: string,
+    @Headers('x-forwarded-for') xForwardedFor: string,
+    @Headers('x-real-ip') xRealIp: string,
+    @Headers('user-agent') userAgent: string,
     @Body() dto: CreateConversationDto,
   ) {
+    // Build deviceInfo from headers and body
+    const clientIp = this.extractClientIp(xForwardedFor, xRealIp);
+    const deviceInfo = {
+      ip: clientIp || dto.deviceInfo?.ip,
+      userAgent: userAgent || dto.deviceInfo?.userAgent,
+      fingerprint: dto.deviceInfo?.fingerprint,
+      region: dto.deviceInfo?.region,
+    };
+
     const conversation = await this.conversationService.createConversation({
       userId,
       title: dto.title,
+      deviceInfo,
     });
 
     return {

packages/services/conversation-service/src/application/dtos/conversation.dto.ts

@@ -1,10 +1,33 @@
 import { IsOptional, IsString, IsNotEmpty, IsArray, ValidateNested } from 'class-validator';
 import { Type } from 'class-transformer';
 
+export class DeviceInfoDto {
+  @IsOptional()
+  @IsString()
+  ip?: string;
+
+  @IsOptional()
+  @IsString()
+  userAgent?: string;
+
+  @IsOptional()
+  @IsString()
+  fingerprint?: string;
+
+  @IsOptional()
+  @IsString()
+  region?: string;
+}
+
 export class CreateConversationDto {
   @IsOptional()
   @IsString()
   title?: string;
+
+  @IsOptional()
+  @ValidateNested()
+  @Type(() => DeviceInfoDto)
+  deviceInfo?: DeviceInfoDto;
 }
 
 export class FileAttachmentDto {

packages/services/conversation-service/src/application/services/conversation.service.ts

@@ -3,6 +3,7 @@ import { v4 as uuidv4 } from 'uuid';
 import {
   ConversationEntity,
   ConversationStatus,
+  DeviceInfo,
 } from '../../domain/entities/conversation.entity';
 import {
   MessageEntity,
@@ -26,6 +27,7 @@ import {
 export interface CreateConversationParams {
   userId: string;
   title?: string;
+  deviceInfo?: DeviceInfo;
 }
 
 export interface FileAttachment {
@@ -63,6 +65,7 @@ export class ConversationService {
       id: uuidv4(),
       userId: params.userId,
       title: params.title || '新对话',
+      deviceInfo: params.deviceInfo,
     });
 
     return this.conversationRepo.save(conversation);