Bump postcss-selector-parser, tailwind-scrollbar and tailwindcss in /web

Removes [postcss-selector-parser](https://github.com/postcss/postcss-selector-parser). It's no longer used after updating ancestor dependencies [postcss-selector-parser](https://github.com/postcss/postcss-selector-parser), [tailwind-scrollbar](https://github.com/adoxography/tailwind-scrollbar) and [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss). These dependencies need to be updated together.


Removes `postcss-selector-parser`

Updates `tailwind-scrollbar` from 3.1.0 to 4.0.2
- [Release notes](https://github.com/adoxography/tailwind-scrollbar/releases)
- [Commits](https://github.com/adoxography/tailwind-scrollbar/compare/v3.1.0...v4.0.2)

Updates `tailwindcss` from 3.4.19 to 4.3.3
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.3.3/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: postcss-selector-parser
  dependency-version:
  dependency-type: indirect
- dependency-name: tailwind-scrollbar
  dependency-version: 4.0.2
  dependency-type: direct:production
- dependency-name: tailwindcss
  dependency-version: 4.3.3
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

web/package.json

@@ -89,7 +89,7 @@
     "sonner": "^2.0.8",
     "swr": "^2.5.1",
     "tailwind-merge": "^2.4.0",
-    "tailwind-scrollbar": "^3.1.0",
+    "tailwind-scrollbar": "^4.0.2",
     "tailwindcss-animate": "^1.0.7",
     "use-long-press": "^3.3.0",
     "vaul": "^1.1.2",
@@ -120,7 +120,7 @@
     "postcss": "^8.5.29",
     "prettier": "^3.9.9",
     "prettier-plugin-tailwindcss": "^0.8.1",
-    "tailwindcss": "^3.4.19",
+    "tailwindcss": "^4.3.3",
     "typescript": "^6.0.3",
     "typescript-eslint": "^8.71.1",
     "vite": "^8.3.3"