_plural convention (#33989)
* Add tests on plurals * Update `collabs_per_proj` and its pluralisations * Update `n_user` and its pluralisations * Update `showing_x_results` and its pluralisations * Update `show_x_more_projects` and its pluralisations * `bin/run web npm run extract-translations` * Populate `_plural` keys in non-en locales For 2-form languages (da, de, es, fi, fr, it, nl, no, pt, sv, tr), copy the existing bare-key value into the new `_plural` sibling to prevent i18next from falling back to English for count!=1. Also remove orphan singular keys (`collabs_per_proj_single`, `showing_1_result*`) left over from the previous commits. Bare-key values remain in their original plural form pending translator review — count=1 will still render the plural form in non-en until translators flip those to singular. Multi-form (cs, pl, ru) and single-form (ja, ko, zh-CN, zh-TW) locales are unchanged. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> * Flip non-en bare-key values to singular form Per review, the i18next v3 plural convention uses the bare key for count=1 (singular) and `_plural` for count!=1. The non-en bare-key values were left as the original plural form by the previous commit so the `_plural` siblings could be copied from them; this commit flips the bare values to the singular form per language. Languages where singular and plural noun forms coincide (Finnish, Swedish, Turkish) are unchanged. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> * Apply suggestions from code review Co-authored-by: Olzhas Askar <olzhas.askar@gmail.com> --------- Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com> Co-authored-by: Olzhas Askar <olzhas.askar@gmail.com> GitOrigin-RevId: 628513ca792c2dcce023247e52b7320e2741cc54
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