Feat: Frontend hardening

Frontend/package.json

@@ -11,19 +11,21 @@
 	"scripts": {
 		"dev": "vite dev",
 		"build": "vite build",
-		"start": "vite start",
+		"typecheck": "tsc --noEmit",
+		"start": "vite preview",
 		"preview": "vite preview"
 	},
 	"dependencies": {
-		"lucide-solid": "^0.542.0",
 		"@solidjs/start": "2.0.0-alpha.2",
 		"@solidjs/vite-plugin-nitro-2": "^0.1.0",
+		"lucide-solid": "^0.542.0",
 		"postcss": "^8.5.15",
 		"sass": "^1.101.0",
 		"solid-js": "^1.9.5",
 		"vite": "^7.0.0"
 	},
 	"devDependencies": {
+		"@types/node": "^25.9.3",
 		"autoprefixer": "^10.5.0",
 		"cssnano": "^8.0.2",
 		"postcss-preset-env": "^11.3.0",