feat(i18n): enhance locale support for rebate settings and report exports

- Updated English, Nepali, and Chinese locale files to include new translations for the "apply rebate to payout" feature, enhancing clarity on its functionality.
- Added new export options for previewing CSV and Excel files in reports, improving user experience with clearer export capabilities.
- Enhanced internationalization support across multiple locales to ensure consistent messaging in the admin interface.

src/modules/settings/system-settings-screen.tsx

@@ -29,6 +29,7 @@ const DRAW_KEYS = {
   AUTO_SETTLEMENT: "settlement.auto_run_on_tick",
   AUTO_APPROVE: "settlement.auto_approve_on_tick",
   AUTO_PAYOUT: "settlement.auto_payout_on_tick",
+  APPLY_REBATE_TO_PAYOUT: "settlement.apply_rebate_to_payout",
 } as const;
 
 const FRONTEND_GROUP = "frontend";
@@ -45,6 +46,7 @@ interface RuntimeDraft {
   autoSettlement: boolean;
   autoApprove: boolean;
   autoPayout: boolean;
+  applyRebateToPayout: boolean;
   playRulesHtmlZh: string;
   playRulesHtmlEn: string;
   playRulesHtmlNe: string;
@@ -92,6 +94,7 @@ export function SystemSettingsScreen() {
     autoSettlement: true,
     autoApprove: true,
     autoPayout: true,
+    applyRebateToPayout: false,
     playRulesHtmlZh: "",
     playRulesHtmlEn: "",
     playRulesHtmlNe: "",
@@ -102,6 +105,7 @@ export function SystemSettingsScreen() {
     autoSettlement: true,
     autoApprove: true,
     autoPayout: true,
+    applyRebateToPayout: false,
     playRulesHtmlZh: "",
     playRulesHtmlEn: "",
     playRulesHtmlNe: "",
@@ -131,6 +135,7 @@ export function SystemSettingsScreen() {
         autoSettlement: Boolean(kv[DRAW_KEYS.AUTO_SETTLEMENT] ?? true),
         autoApprove: Boolean(kv[DRAW_KEYS.AUTO_APPROVE] ?? true),
         autoPayout: Boolean(kv[DRAW_KEYS.AUTO_PAYOUT] ?? true),
+        applyRebateToPayout: Boolean(kv[DRAW_KEYS.APPLY_REBATE_TO_PAYOUT] ?? false),
         playRulesHtmlZh: String(kv[FRONTEND_KEYS.PLAY_RULES_HTML_ZH] ?? legacyHtml),
         playRulesHtmlEn: String(kv[FRONTEND_KEYS.PLAY_RULES_HTML_EN] ?? ""),
         playRulesHtmlNe: String(kv[FRONTEND_KEYS.PLAY_RULES_HTML_NE] ?? ""),
@@ -167,6 +172,7 @@ export function SystemSettingsScreen() {
       await updateAdminSetting(DRAW_KEYS.AUTO_SETTLEMENT, draft.autoSettlement);
       await updateAdminSetting(DRAW_KEYS.AUTO_APPROVE, draft.autoApprove);
       await updateAdminSetting(DRAW_KEYS.AUTO_PAYOUT, draft.autoPayout);
+      await updateAdminSetting(DRAW_KEYS.APPLY_REBATE_TO_PAYOUT, draft.applyRebateToPayout);
       await updateAdminSetting(FRONTEND_KEYS.PLAY_RULES_HTML_ZH, draft.playRulesHtmlZh);
       await updateAdminSetting(FRONTEND_KEYS.PLAY_RULES_HTML_EN, draft.playRulesHtmlEn);
       await updateAdminSetting(FRONTEND_KEYS.PLAY_RULES_HTML_NE, draft.playRulesHtmlNe);
@@ -242,6 +248,21 @@ export function SystemSettingsScreen() {
 
           <div className="h-px bg-border/60" />
 
+          <div className="flex flex-wrap items-center justify-between gap-3">
+            <div className="min-w-0 space-y-1 pr-4">
+              <Label className="text-sm font-medium">{t("system.fields.applyRebateToPayout", { ns: "config" })}</Label>
+              <p className="text-xs text-muted-foreground">{t("system.hints.applyRebateToPayout", { ns: "config" })}</p>
+            </div>
+            <Switch
+              checked={draft.applyRebateToPayout}
+              disabled={loading || saving}
+              aria-label={t("system.fields.applyRebateToPayout", { ns: "config" })}
+              onCheckedChange={(value) => updateDraft("applyRebateToPayout", value)}
+            />
+          </div>
+
+          <div className="h-px bg-border/60" />
+
           <div className="grid max-w-xs gap-2">
             <Label htmlFor="cooldown-minutes" className="text-sm font-medium">
               {t("system.fields.cooldownMinutes", { ns: "config" })}