Fixes for the Polish catalogs of #1100, on top of a merge of main:
- English plural suffixes ("s"/"") and the "it"/"them" words in 51 format
messages are now consumed with `{:.0}`, as docs/localization.md asks;
Polish showed "Zaimportowano 5 zdjęćs" and "utracisz they are". The
counts read "Zaimportowane zdjęcia: 5", which is right for every number
(Polish has three plural forms; ru and uk use the same pattern).
- The 19 format messages main gained since the translation was written;
without them the build fails.
- 118 plain messages the other catalogs already translate.
- "▸" and "▾" in translations become "→" and "⌄", as the other catalogs do
(translated_catalogs_do_not_use_missing_menu_triangles).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
witkowski01