chore(deps-dev): bump tailwindcss from 4.1.18 to 4.2.1

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 4.1.18 to 4.2.1.
- [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/v4.2.1/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.2.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

bun.lock

@@ -42,7 +42,7 @@
 		"rollup-plugin-license": "^3.6.0",
 		"svelte": "^5.53.6",
 		"svelte-check": "^4.4.4",
-		"tailwindcss": "^4.1.18",
+		"tailwindcss": "^4.2.1",
 		"typescript": "^5.9.3",
 		"unplugin-icons": "^23.0.1",
 		"vite": "^7.3.1"