feat(i18n): add Russian (ru) locale for desktop app

[Fenick2]

Summary

Adds a complete Russian (ru) translation for the Hermes Desktop app.

• New apps/desktop/src/i18n/ru.ts with full translation (3093 lines), validated against the Translations type with tsc (zero errors).
• Registers ru in the Locale type (types.ts), the TRANSLATIONS catalog (catalog.ts), and LOCALE_OPTIONS / aliases (languages.ts).
• Adds ru, ru-ru, russian, русский locale aliases.

Test plan

• npx tsc -p . --noEmit passes with the new file (no errors in ru.ts)
• Built the desktop bundle; Русский appears in the language picker
• Selected Russian in Settings → Appearance → Language; UI switches to Russian

Users with display.language: ru now get a fully localized desktop interface.

🤖 Generated with Claude Code

[alt-glitch]

This was generated by AI during triage.

Duplicate of #72250. Both add the Russian Desktop locale through the same catalog, language alias, locale file, and type-registration mechanism; #72250 is the current canonical implementation with regression coverage.

[Enough1122]

AI code review — automated review for reference, author can ignore or act on any point.

feat(i18n): add Russian (ru) locale for desktop app

Large, complete translation addition — the Translations type gives compile-time key parity, and the plural helper correctly implements Russian 1/few/many rules (including the mod100 == 11 / 12–14 exceptions). Observations:

1. A prior triage comment flags this as a duplicate of feat(i18n): add complete Russian desktop locale #72250 (same catalog/locale/alias/type-registration mechanism). Worth coordinating before merge to avoid a duplicate-merge or a conflict on catalog.ts/languages.ts — if feat(i18n): add complete Russian desktop locale #72250 is canonical, this PR should either supersede it explicitly or be closed in its favor.

2. The plural helper is defined inside ru.ts — if the Arabic locale (or a future Slavic one) defines its own copy, the pluralization logic will be duplicated per-locale and can drift. Consider extracting the plural rules into a shared helper (parameterized by language) that all locales use, so 1/2/5 уведомление-style rules stay consistent across the catalog.

3. Minor style: providerCustomEndpoints: "Свои endpoint'ы" uses a transliterated plural ("endpoint'ы") which reads as slang; a native phrasing like «Свои конечные точки» or «Свои эндпоинты» would fit the settings context better. Also the embedsReset continuation line (around the Сбросить ${count} … entry) has inconsistent indentation — cosmetic.

[Fenick2]

Superseded by #72250 (canonical Russian locale PR). Closing as duplicate.