Empty Russian and Chinese locale files so English is used regardless
of client language. Translate all CustomGameEventManager error messages,
SendCustomMessage calls, and deck/card UI strings to English.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Override getCardDeckSlots to always return 1 so mythic and higher
rarity cards don't take multiple slots in the 30-slot deck.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>