fix(i18n): mark style labels without loading the catalogs (#1421)

The style shaders and visualPresets imported msg() from src/i18n/index.js,
which loads every locale catalog. The share-view codec reads the styles'
defaults, so a server bundling the codec carried about 0.9 MB of
translations it never uses. They now import the catalog-free marker, as
other portable modules do; the codec's bundle drops from about 1 MB to
130 KB.

src/styles/snow.js

@@ -1,4 +1,4 @@
-import { msg } from '../i18n/index.js';
+import { msg } from '../i18n/marker.js';
 
 /**
  * Snow Style — White overlay + Desaturation + Falling particles