fix: production readiness — resolve build, lint, and code quality issues

- Fix Next.js build failure: remove duplicate route at (dashboard)/listings/[id]
  that conflicted with (public)/listings/[id] (same URL path in two route groups)
- Fix 772 ESLint errors: auto-fix import ordering (import-x/order), remove unused
  imports/variables, convert empty interfaces to type aliases, replace require()
  with ESM imports, fix consistent-type-imports violations
- Add CLAUDE.md for developer onboarding documentation
- All checks pass: 0 lint errors, typecheck clean, 230 tests passing, build success

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/payments/presentation/controllers/payments.controller.ts

@@ -8,6 +8,7 @@ import {
   Query,
   UseGuards,
 } from '@nestjs/common';
+import { type CommandBus, type QueryBus } from '@nestjs/cqrs';
 import {
   ApiTags,
   ApiOperation,
@@ -16,26 +17,25 @@ import {
   ApiParam,
 } from '@nestjs/swagger';
 import { Throttle } from '@nestjs/throttler';
-import { CommandBus, QueryBus } from '@nestjs/cqrs';
-import { JwtAuthGuard } from '@modules/auth/presentation/guards/jwt-auth.guard';
-import { RolesGuard } from '@modules/auth/presentation/guards/roles.guard';
+import { type PaymentProvider } from '@prisma/client';
+import { type JwtPayload } from '@modules/auth/infrastructure/services/token.service';
 import { CurrentUser } from '@modules/auth/presentation/decorators/current-user.decorator';
 import { Roles } from '@modules/auth/presentation/decorators/roles.decorator';
-import { type JwtPayload } from '@modules/auth/infrastructure/services/token.service';
+import { JwtAuthGuard } from '@modules/auth/presentation/guards/jwt-auth.guard';
+import { RolesGuard } from '@modules/auth/presentation/guards/roles.guard';
 import { CreatePaymentCommand } from '../../application/commands/create-payment/create-payment.command';
-import { HandleCallbackCommand } from '../../application/commands/handle-callback/handle-callback.command';
-import { RefundPaymentCommand } from '../../application/commands/refund-payment/refund-payment.command';
-import { GetPaymentStatusQuery } from '../../application/queries/get-payment-status/get-payment-status.query';
-import { ListTransactionsQuery } from '../../application/queries/list-transactions/list-transactions.query';
 import { type CreatePaymentResult } from '../../application/commands/create-payment/create-payment.handler';
+import { HandleCallbackCommand } from '../../application/commands/handle-callback/handle-callback.command';
 import { type HandleCallbackResult } from '../../application/commands/handle-callback/handle-callback.handler';
+import { RefundPaymentCommand } from '../../application/commands/refund-payment/refund-payment.command';
 import { type RefundPaymentResult } from '../../application/commands/refund-payment/refund-payment.handler';
 import { type PaymentStatusDto } from '../../application/queries/get-payment-status/get-payment-status.handler';
+import { GetPaymentStatusQuery } from '../../application/queries/get-payment-status/get-payment-status.query';
 import { type TransactionListDto } from '../../application/queries/list-transactions/list-transactions.handler';
-import { CreatePaymentDto } from '../dto/create-payment.dto';
-import { RefundPaymentDto } from '../dto/refund-payment.dto';
-import { ListTransactionsDto } from '../dto/list-transactions.dto';
-import { type PaymentProvider } from '@prisma/client';
+import { ListTransactionsQuery } from '../../application/queries/list-transactions/list-transactions.query';
+import { type CreatePaymentDto } from '../dto/create-payment.dto';
+import { type ListTransactionsDto } from '../dto/list-transactions.dto';
+import { type RefundPaymentDto } from '../dto/refund-payment.dto';
 
 @ApiTags('payments')
 @Controller('payments')

apps/api/src/modules/payments/presentation/dto/create-payment.dto.ts

@@ -1,3 +1,6 @@
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+import { PaymentProvider, PaymentType } from '@prisma/client';
+import { Transform } from 'class-transformer';
 import {
   IsEnum,
   IsNotEmpty,
@@ -9,9 +12,6 @@ import {
   Min,
   MinLength,
 } from 'class-validator';
-import { Transform } from 'class-transformer';
-import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
-import { PaymentProvider, PaymentType } from '@prisma/client';
 
 export class CreatePaymentDto {
   @ApiProperty({ enum: PaymentProvider, description: 'Payment provider' })

apps/api/src/modules/payments/presentation/dto/list-transactions.dto.ts

@@ -1,6 +1,6 @@
-import { IsEnum, IsInt, IsOptional, Max, Min } from 'class-validator';
 import { ApiPropertyOptional } from '@nestjs/swagger';
 import { PaymentStatus } from '@prisma/client';
+import { IsEnum, IsInt, IsOptional, Max, Min } from 'class-validator';
 
 export class ListTransactionsDto {
   @ApiPropertyOptional({ enum: PaymentStatus, description: 'Filter by payment status' })

apps/api/src/modules/payments/presentation/dto/refund-payment.dto.ts

@@ -1,5 +1,5 @@
-import { IsString, MinLength } from 'class-validator';
 import { ApiProperty } from '@nestjs/swagger';
+import { IsString, MinLength } from 'class-validator';
 
 export class RefundPaymentDto {
   @ApiProperty({ description: 'Reason for the refund', example: 'Customer requested cancellation' })