vite-plugin-obfuscator processes ALL output chunks including vendor
libraries, corrupting Mapbox GL's WebGL shader string literals via
base64 encoding and string splitting. This caused the map to render
as a blank screen in production.
Vite's built-in esbuild minification already mangles identifiers and
removes whitespace, providing sufficient code protection.
Adds regression tests to prevent re-introducing obfuscation plugins.
