chore: Remove unused testing dependencies and configuration files to streamline the project and reduce clutter in the codebase.

frontend/package.json

@@ -9,10 +9,7 @@
     "build:check": "tsc -b && vite build",
     "lint": "eslint .",
     "preview": "vite preview",
-    "typecheck": "tsc --noEmit",
-    "test": "vitest",
-    "test:run": "vitest run",
-    "test:coverage": "vitest run --coverage"
+    "typecheck": "tsc --noEmit"
   },
   "dependencies": {
     "@tabler/core": "^1.3.2",
@@ -27,8 +24,6 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.29.0",
-    "@testing-library/jest-dom": "^6.6.3",
-    "@testing-library/react": "^16.2.0",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@vitejs/plugin-react": "^4.5.2",
@@ -36,10 +31,8 @@
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-react-refresh": "^0.4.20",
     "globals": "^16.2.0",
-    "jsdom": "^26.0.0",
     "typescript": "^5.7.2",
-    "vite": "^7.0.0",
-    "vitest": "^2.1.8"
+    "vite": "^7.0.0"
   },
   "optionalDependencies": {
     "@rollup/rollup-linux-x64-musl": "4.40.0"