Bump tailwindcss from 3.4.9 to 3.4.19 in /web

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 3.4.9 to 3.4.19.
- [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/v3.4.19/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 3.4.19
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

web/package.json

@@ -120,7 +120,7 @@
     "postcss": "^8.5.12",
     "prettier": "^3.9.6",
     "prettier-plugin-tailwindcss": "^0.8.1",
-    "tailwindcss": "^3.4.9",
+    "tailwindcss": "^3.4.19",
     "typescript": "^5.9.3",
     "typescript-eslint": "^8.70.0",
     "vite": "^8.3.0"