refactor: batch 1

package.json

@@ -24,6 +24,7 @@
     "@emotion/styled": "^11.14.0",
     "@reduxjs/toolkit": "^2.8.2",
     "@unlock-music/crypto": "0.1.10",
+    "classnames": "^2.5.1",
     "framer-motion": "^12.12.1",
     "nanoid": "^5.1.5",
     "next-themes": "^0.4.6",
@@ -32,8 +33,8 @@
     "react-dom": "^19.1.0",
     "react-dropzone": "^14.3.8",
     "react-icons": "^5.5.0",
-    "react-promise-suspense": "^0.3.4",
     "react-redux": "^9.2.0",
+    "react-router": "^7.6.0",
     "react-syntax-highlighter": "^15.6.1",
     "sass": "^1.89.0",
     "sql.js": "^1.13.0",
@@ -42,6 +43,7 @@
   "devDependencies": {
     "@eslint/js": "^9.26.0",
     "@rollup/plugin-replace": "^6.0.2",
+    "@tailwindcss/vite": "^4.1.7",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.3.0",
     "@testing-library/user-event": "^14.6.1",
@@ -67,6 +69,7 @@
     "prettier": "^3.5.3",
     "rollup": "^4.40.2",
     "simple-git-hooks": "^2.13.0",
+    "tailwindcss": "^4.1.7",
     "terser": "^5.39.2",
     "typescript": "^5.8.3",
     "typescript-eslint": "^8.32.1",