fix: configure nest build to use tsc compiler directly

- Set explicit "builder": "tsc" in nest-cli.json
- Simplified tsconfig.build.json to only extend base config
- Updated build script back to `nest build && tsc-alias`

This ensures NestJS uses the TypeScript compiler that properly respects path mappings in tsconfig.json.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/backend/nest-cli.json

@@ -4,10 +4,8 @@
   "sourceRoot": "src",
   "compilerOptions": {
     "deleteOutDir": true,
-    "webpack": false,
+    "builder": "tsc",
     "tsConfigPath": "tsconfig.build.json",
-    "plugins": ["@nestjs/swagger"],
-    "assets": [],
-    "watchAssets": false
+    "plugins": ["@nestjs/swagger"]
   }
 }

apps/backend/package.json

@@ -4,8 +4,7 @@
   "description": "Xpeditis Backend API - Maritime Freight Booking Platform",
   "private": true,
   "scripts": {
-    "build": "tsc -p tsconfig.build.json && tsc-alias -p tsconfig.build.json",
-    "build:nest": "nest build && tsc-alias",
+    "build": "nest build && tsc-alias -p tsconfig.build.json",
     "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
     "start": "nest start",
     "dev": "nest start --watch",

apps/backend/tsconfig.build.json

@@ -1,12 +1,4 @@
 {
   "extends": "./tsconfig.json",
-  "compilerOptions": {
-    "baseUrl": "./",
-    "paths": {
-      "@domain/*": ["src/domain/*"],
-      "@application/*": ["src/application/*"],
-      "@infrastructure/*": ["src/infrastructure/*"]
-    }
-  },
   "exclude": ["node_modules", "test", "dist", "**/*spec.ts"]
 }