feat(ops): v4.0.7 HQ 活动图快链与勾选导出

HQ 指定一张活动图为勾选主合伙人合成 PNG/zip；城市合伙人页增加快链与单下/导出。

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/modules/ops/dto/activity-poster.dto.ts

@@ -1,5 +1,8 @@
 import { Type } from 'class-transformer';
 import {
+  ArrayMaxSize,
+  ArrayMinSize,
+  IsArray,
   IsIn,
   IsInt,
   IsNumber,
@@ -11,7 +14,7 @@ import {
   MinLength,
   ValidateIf,
 } from 'class-validator';
-import { ACTIVITY_POSTER_STATUSES } from '@dukang/shared-types';
+import { ACTIVITY_POSTER_PACK_MAX_PARTNERS, ACTIVITY_POSTER_STATUSES } from '@dukang/shared-types';
 import { PaginationQueryDto } from './admin-query.dto';
 
 export class ActivityPosterQueryDto extends PaginationQueryDto {
@@ -76,3 +79,11 @@ export class ActivityPosterSelectionDto {
   @IsString()
   posterId?: string | null;
 }
+
+export class ActivityPosterPackDto {
+  @IsArray()
+  @ArrayMinSize(1)
+  @ArrayMaxSize(ACTIVITY_POSTER_PACK_MAX_PARTNERS)
+  @IsString({ each: true })
+  partnerIds!: string[];
+}