add category swagger schema

src/module/categories/dto/create-category.dto.ts

@@ -1,16 +1,33 @@
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
 import { IsOptional, IsString, IsUUID, MaxLength, MinLength } from 'class-validator';
 
 export class CreateCategoryDto {
+  @ApiProperty({
+    example: 'Technology',
+    description: 'Name of the category',
+    minLength: 1,
+    maxLength: 120,
+  })
   @IsString()
   @MinLength(1)
   @MaxLength(120)
   name: string;
 
+  @ApiPropertyOptional({
+    example: 'technology',
+    description: 'URL-friendly slug for the category',
+    maxLength: 140,
+  })
   @IsOptional()
   @IsString()
   @MaxLength(140)
   slug?: string;
 
+  @ApiPropertyOptional({
+    example: '550e8400-e29b-41d4-a716-446655440000',
+    description: 'Parent category UUID (if this is a sub-category)',
+    nullable: true,
+  })
   @IsOptional()
   @IsUUID()
   parentId?: string | null;

src/module/categories/dto/update-category.dto.ts

@@ -1,17 +1,34 @@
+import { ApiPropertyOptional } from '@nestjs/swagger';
 import { IsOptional, IsString, IsUUID, MaxLength, MinLength } from 'class-validator';
 
 export class UpdateCategoryDto {
+  @ApiPropertyOptional({
+    example: 'Technology',
+    description: 'Name of the category',
+    minLength: 1,
+    maxLength: 120,
+  })
   @IsOptional()
   @IsString()
   @MinLength(1)
   @MaxLength(120)
   name?: string;
 
+  @ApiPropertyOptional({
+    example: 'technology',
+    description: 'URL-friendly slug for the category',
+    maxLength: 140,
+  })
   @IsOptional()
   @IsString()
   @MaxLength(140)
   slug?: string;
 
+  @ApiPropertyOptional({
+    example: '550e8400-e29b-41d4-a716-446655440000',
+    description: 'Parent category UUID (if this is a sub-category)',
+    nullable: true,
+  })
   @IsOptional()
   @IsUUID()
   parentId?: string | null;