feat(i18n, config): 增强多语言支持并新增系统配置项

更新英文、尼泊尔语与中文语言包，新增默认币种、开奖间隔、投注窗口及相关设置的翻译文案，提升界面清晰度与用户体验。
在系统设置中新增开奖相关配置字段，增强彩票系统参数管理的灵活性。
优化多语言国际化支持，确保后台管理界面在不同语言环境下的信息表达一致性。

src/i18n/locales/en/config.json

@@ -182,6 +182,14 @@
     "fields": {
       "manualReview": "Require manual review for draw results",
       "cooldownMinutes": "Cooldown duration (minutes)",
+      "defaultCurrency": "Default currency code",
+      "drawIntervalMinutes": "Draw interval (minutes)",
+      "drawBettingWindowSeconds": "Betting window (seconds)",
+      "drawCloseBeforeDrawSeconds": "Close before draw (seconds)",
+      "drawBufferDrawsAhead": "Pre-generated future draws",
+      "currencyDisplayDecimals": "Display decimals",
+      "currencyDecimalSeparator": "Decimal separator",
+      "currencyThousandsSeparator": "Thousands separator",
       "autoSettlement": "Run settlement automatically",
       "autoApprove": "Auto-approve settlement batches",
       "autoPayout": "Auto-credit winnings to wallets",