prax wasm assets are duplicated

[turbocrime]

Describe the bug
Prax build process outputs duplicate wasm assets.

To Reproduce
Steps to reproduce the behavior:

$ pnpm build
$ cd apps/extension
$ md5sum dist/** | sort | awk '{print $2, $1}' | uniq -D -f 1
md5sum: dist/favicon: Is a directory
md5sum: dist/keys: Is a directory
dist/5b67a1859fe9cf3bf91a.module.wasm 235afa970871fa2d1eb53960eb502132
dist/9764d0cf663f6b51e401.module.wasm 235afa970871fa2d1eb53960eb502132
dist/99cdcf8241607bfd038f.module.wasm 235afa970871fa2d1eb53960eb502132

Expected behavior
Each asset in the build output should be unique.

Additional context

$ du -h dist/*.wasm
5.0M    dist/5b67a1859fe9cf3bf91a.module.wasm
5.0M    dist/9764d0cf663f6b51e401.module.wasm
5.0M    dist/99cdcf8241607bfd038f.module.wasm

[TalDerei]

related to penumbra-zone/web#564