fix: remove stale compiled JS files from src and ignore them in .gitignore

Rollup was resolving register.js (and other compiled .js files) instead
of the .ts sources, causing 'default is not exported' build failures in CI.
Deleted all .js artifacts from server/src and admin/src and added them
to .gitignore so they are never committed again.

Author: devCluna

.gitignore

@@ -102,6 +102,10 @@ public/uploads/*
 dist
 build
 
+# Compiled JS files inside src (TypeScript sources only)
+server/src/**/*.js
+admin/src/**/*.js
+
 
 ############################
 # Node.js