The Simplified Chinese catalog had 20 `@msg` rows, against 714 to 718
in each catalog listed in COMPLETE_MESSAGES, so with the interface in
Simplified Chinese most status-bar and error messages showed in
English.
- zh-hans.tsv gains the 694 missing `@msg` rows in one block with a
header comment on its conventions: no final 。 unless the English
ends with a period, a space between Chinese and adjacent Latin
text, numbers or placeholders, and 、 between list items. The rows
use the catalog's existing terms (画板, 图稿, 编组, 描边, 色板, 实时上色,
图像描摹, 增效工具 ...).
- zh-hans joins COMPLETE_MESSAGES, so
complete_languages_translate_every_message and the narrower message
tests fail when a zh-hans message row is missing, and a new message
needs a zh-hans row.
- The registry comment, docs/development.md (which also gains Greek,
already in COMPLETE_MESSAGES), the zh-hans row of
docs/localization-parity.md, and the interface-languages line of
docs/target-app-parity.md (which also gains Czech, Greek, Hungarian,
Swedish and Finnish) list Simplified Chinese among the languages
that translate messages.