Rollup in vite.main.config.ts doesn't know about the `@/` alias (only the
renderer configs do). After PR 4 made `lib/errors.ts` reachable from main,
its `@/config/env` import broke the main build with:
[vite]: Rollup failed to resolve import "@/config/env" from "lib/errors.ts"
Swap to a relative import — the module is now genuinely isomorphic.