Phase 1 complete

apps/backend/src/user/dto/update-user.dto.ts

@@ -0,0 +1,27 @@
+import { IsString, IsEmail, MinLength, IsOptional } from 'class-validator';
+import { ApiPropertyOptional } from '@nestjs/swagger';
+
+export class UpdateUserDto {
+  @ApiPropertyOptional({ description: 'New email address', example: 'newemail@example.com' })
+  @IsOptional()
+  @IsEmail()
+  email?: string;
+
+  @ApiPropertyOptional({ description: 'New username', example: 'newusername' })
+  @IsOptional()
+  @IsString()
+  @MinLength(3)
+  username?: string;
+}
+
+export class UpdatePasswordDto {
+  @ApiPropertyOptional({ description: 'Current password', example: 'oldpassword123' })
+  @IsString()
+  @MinLength(6)
+  currentPassword: string;
+
+  @ApiPropertyOptional({ description: 'New password', example: 'newpassword123' })
+  @IsString()
+  @MinLength(6)
+  newPassword: string;
+}