Fix incorrect Scalar CSS import (#10763)

CSS was loaded in a global context (full screen which might be re-used
for other use cases in the future) instead of a local context.

\+ small update on .env.example

packages/twenty-front/.env.example

@@ -1,6 +1,5 @@
 REACT_APP_SERVER_BASE_URL=http://localhost:3000
-GENERATE_SOURCEMAP=false
-TRANSLATION_IO_API_KEY=xxx
+VITE_BUILD_SOURCEMAP=false
 
 
 # ———————— Optional ————————