Code minification

Shrink JavaScript and CSS to the smallest valid output. The JavaScript minifier is backed by oxc-minifier; CSS uses Lightning CSS, the same engine the modern Vite / Tailwind toolchain is built on. Both strip whitespace, dead code, and redundant tokens while preserving semantics. Useful when you want minified output server-side without bundling a minifier into the client or running a Node-side build step.