Lots of technical improvements

package.json

@@ -7,7 +7,8 @@
     "build": "ng build",
     "watch": "ng build --watch --configuration development",
     "test": "ng test",
-    "lint": "ng lint"
+    "lint": "ng lint",
+    "i18n:check": "node scripts/check-i18n.mjs"
   },
   "private": true,
   "dependencies": {
@@ -21,10 +22,10 @@
     "@angular/material": "~21.2.6",
     "@angular/platform-browser": "~21.2.9",
     "@angular/router": "~21.2.9",
+    "@angular/service-worker": "21.2.9",
     "@babylonjs/core": "^8.54.1",
     "@ngx-translate/core": "^17.0.0",
     "@ngx-translate/http-loader": "^17.0.0",
-    "inquirer": "^13.3.0",
     "rxjs": "~7.8.2",
     "swiper": "~12.1.0",
     "tslib": "~2.8.1"
@@ -39,6 +40,11 @@
     "angular-eslint": "21.3.1",
     "eslint": "^10.0.3",
     "jasmine-core": "~6.1.0",
+    "karma": "^6.4.4",
+    "karma-chrome-launcher": "^3.2.0",
+    "karma-coverage": "^2.2.1",
+    "karma-jasmine": "^5.1.0",
+    "karma-jasmine-html-reporter": "^2.2.0",
     "tailwindcss": "^3.4.19",
     "typescript": "~5.9.3",
     "typescript-eslint": "8.58.2"