251211:1314 Frontend: reeactor Admin panel

backend/src/modules/contract/dto/create-contract.dto.ts

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+import {
+  IsString,
+  IsNotEmpty,
+  IsBoolean,
+  IsOptional,
+  Length,
+  IsInt,
+  IsDateString,
+} from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class CreateContractDto {
+  @ApiProperty({ example: 1 })
+  @IsInt()
+  @IsNotEmpty()
+  projectId!: number;
+
+  @ApiProperty({ example: 'C-001' })
+  @IsString()
+  @IsNotEmpty()
+  @Length(1, 50)
+  contractCode!: string;
+
+  @ApiProperty({ example: 'Main Construction Contract' })
+  @IsString()
+  @IsNotEmpty()
+  @Length(1, 255)
+  contractName!: string;
+
+  @ApiProperty({ example: 'Description of the contract', required: false })
+  @IsOptional()
+  @IsString()
+  description?: string;
+
+  @ApiProperty({ example: '2024-01-01', required: false })
+  @IsOptional()
+  @IsDateString()
+  startDate?: string; // Receive as string, TypeORM handles date
+
+  @ApiProperty({ example: '2025-12-31', required: false })
+  @IsOptional()
+  @IsDateString()
+  endDate?: string;
+
+  @ApiProperty({ example: true, required: false })
+  @IsOptional()
+  @IsBoolean()
+  isActive?: boolean;
+}

backend/src/modules/contract/dto/search-contract.dto.ts

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+import { IsOptional, IsString, IsInt, Min } from 'class-validator';
+import { Type } from 'class-transformer';
+import { ApiPropertyOptional } from '@nestjs/swagger';
+
+export class SearchContractDto {
+  @ApiPropertyOptional({ description: 'Search term (code or name)' })
+  @IsOptional()
+  @IsString()
+  search?: string;
+
+  @ApiPropertyOptional({ description: 'Filter by Project ID' })
+  @IsOptional()
+  @IsInt()
+  @Type(() => Number)
+  projectId?: number;
+
+  @ApiPropertyOptional({ description: 'Page number', default: 1 })
+  @IsOptional()
+  @IsInt()
+  @Min(1)
+  @Type(() => Number)
+  page?: number = 1;
+
+  @ApiPropertyOptional({ description: 'Items per page', default: 100 })
+  @IsOptional()
+  @IsInt()
+  @Min(1)
+  @Type(() => Number)
+  limit?: number = 100;
+}

backend/src/modules/contract/dto/update-contract.dto.ts

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+import { PartialType } from '@nestjs/swagger';
+import { CreateContractDto } from './create-contract.dto.js';
+
+export class UpdateContractDto extends PartialType(CreateContractDto) {}