esbuild-mangle-unsupportedproduction.mangle on the esbuild adapter, which turns mangling off.
A name in angle brackets is a value the message fills in.
[csszyx] esbuild-mangle-unsupported: The esbuild adapter does not support `production.mangle`, so class mangling is off for this build.
help: use the Vite, Rollup or webpack plugin when the build needs mangled class names.
note: emitted JS and CSS keep the original class names, so they still match.
docs: https://csszyx.com/e/esbuild-mangle-unsupported