refactor: migrate backend framework from Express to NestJS

src/serials/dto/index.ts

@@ -0,0 +1,63 @@
+import { IsString, IsNotEmpty, IsNumber, IsOptional, IsBoolean, Min, Max } from 'class-validator';
+
+export class GenerateSerialDto {
+  @IsString()
+  @IsNotEmpty({ message: '企业名称不能为空' })
+  companyName: string;
+
+  @IsOptional()
+  @IsNumber()
+  @Min(1)
+  @Max(100)
+  quantity?: number;
+
+  @IsOptional()
+  @IsNumber()
+  validDays?: number;
+}
+
+export class GenerateWithPrefixDto extends GenerateSerialDto {
+  @IsString()
+  @IsNotEmpty({ message: '自定义前缀不能为空' })
+  serialPrefix: string;
+}
+
+export class QRCodeDto {
+  @IsOptional()
+  @IsString()
+  baseUrl?: string;
+}
+
+export class UpdateSerialDto {
+  @IsOptional()
+  @IsString()
+  companyName?: string;
+
+  @IsOptional()
+  @IsString()
+  validUntil?: string;
+
+  @IsOptional()
+  @IsBoolean()
+  isActive?: boolean;
+}
+
+export interface Serial {
+  id: number;
+  serial_number: string;
+  company_name: string;
+  valid_until: string | null;
+  is_active: boolean;
+  created_by: number | null;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface SerialListItem {
+  serialNumber: string;
+  companyName: string;
+  validUntil: string | null;
+  isActive: boolean;
+  createdAt: string;
+  createdBy?: string;
+}