add tailwind css v4, shadcn/ui with initial components

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -13,10 +13,17 @@
 		"format": "biome check --write ."
 	},
 	"dependencies": {
+		"@tailwindcss/vite": "^4.2.1",
 		"@tanstack/react-router": "^1.166.7",
 		"@tanstack/router-plugin": "^1.166.7",
+		"class-variance-authority": "^0.7.1",
+		"clsx": "^2.1.1",
+		"lucide-react": "^0.577.0",
+		"radix-ui": "^1.4.3",
 		"react": "^19.2.4",
-		"react-dom": "^19.2.4"
+		"react-dom": "^19.2.4",
+		"tailwind-merge": "^3.5.0",
+		"tailwindcss": "^4.2.1"
 	},
 	"devDependencies": {
 		"@biomejs/biome": "^2.4.6",