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/auth/infrastructure/services/token.service.ts

@@ -1,9 +1,9 @@
-import { Inject, Injectable } from '@nestjs/common';
-import { JwtService } from '@nestjs/jwt';
 import { randomBytes, createHash } from 'crypto';
+import { Inject, Injectable } from '@nestjs/common';
+import { type JwtService } from '@nestjs/jwt';
 import {
   REFRESH_TOKEN_REPOSITORY,
-  IRefreshTokenRepository,
+  type IRefreshTokenRepository,
 } from '../../domain/repositories/refresh-token.repository';
 
 export interface JwtPayload {