feat: integrate Tailwind CSS v4 and verify with dashboard UI

package.json

@@ -27,6 +27,7 @@
 		"@prisma/adapter-pg": "^7.3.0",
 		"@prisma/client": "^6.19.2",
 		"@tabler/icons-react": "^3.36.1",
+		"@tailwindcss/vite": "^4.1.18",
 		"@tanstack/react-router": "^1.158.1",
 		"better-auth": "^1.4.18",
 		"dayjs": "^1.11.19",
@@ -36,6 +37,7 @@
 		"pino-pretty": "^13.1.3",
 		"react": "^19",
 		"react-dom": "^19",
+		"tailwindcss": "^4.1.18",
 		"valtio": "^2.3.0"
 	},
 	"devDependencies": {