build: add typescript compilation step before frontend build

The build script now runs TypeScript compilation (tsc) before the frontend build to catch type errors earlier in the process. Also downgraded eslint to v8.57.0 for compatibility reasons.

build.sh

@@ -8,7 +8,7 @@ cd frontend
 npm install
 
 echo "🔨 Construindo o frontend para produção..."
-npm run build
+npx tsc && npm run build
 
 if [ $? -ne 0 ]; then
     echo "❌ Falha no build do frontend. Abortando."

frontend/package.json

@@ -21,7 +21,7 @@
     "@typescript-eslint/eslint-plugin": "^8.0.0",
     "@typescript-eslint/parser": "^8.0.0",
     "@vitejs/plugin-react": "^4.2.1",
-    "eslint": "^9.0.0",
+    "eslint": "^8.57.0",
     "eslint-plugin-react-hooks": "^4.6.0",
     "eslint-plugin-react-refresh": "^0.4.5",
     "typescript": "^5.9.3",