feat: show subscription revenue and referral earnings in network stats

Add subscription revenue (total from subscription payments) to the
stats panel alongside referral earnings. Layout updated to 2-column
grid with subscription revenue highlighted in accent color.

src/locales/en.json

@@ -1247,7 +1247,8 @@
         "totalUsers": "Users",
         "totalReferrers": "Referrers",
         "totalCampaigns": "Campaigns",
-        "totalEarnings": "Total earnings"
+        "subscriptionRevenue": "Subscription revenue",
+        "totalEarnings": "Ref. earnings"
       },
       "legend": {
         "title": "Legend",

src/locales/fa.json

@@ -1081,7 +1081,8 @@
         "totalUsers": "کاربران",
         "totalReferrers": "ارجاع‌دهندگان",
         "totalCampaigns": "کمپین‌ها",
-        "totalEarnings": "درآمد کل"
+        "subscriptionRevenue": "درآمد اشتراک",
+        "totalEarnings": "درآمد ارجاع"
       },
       "legend": {
         "title": "راهنما",

src/locales/ru.json

@@ -1268,7 +1268,8 @@
         "totalUsers": "Пользователей",
         "totalReferrers": "Рефереров",
         "totalCampaigns": "Кампаний",
-        "totalEarnings": "Общий доход"
+        "subscriptionRevenue": "Доход с подписок",
+        "totalEarnings": "Реф. доход"
       },
       "legend": {
         "title": "Легенда",

src/locales/zh.json

@@ -1081,7 +1081,8 @@
         "totalUsers": "用户",
         "totalReferrers": "推荐人",
         "totalCampaigns": "活动",
-        "totalEarnings": "总收入"
+        "subscriptionRevenue": "订阅收入",
+        "totalEarnings": "推荐收入"
       },
       "legend": {
         "title": "图例",

src/pages/ReferralNetwork/components/NetworkStats.tsx

@@ -10,38 +10,51 @@ interface NetworkStatsProps {
 export function NetworkStats({ data, className }: NetworkStatsProps) {
   const { t } = useTranslation();
 
-  const stats = [
-    {
-      label: t('admin.referralNetwork.stats.totalUsers'),
-      value: data.total_users.toLocaleString(),
-    },
-    {
-      label: t('admin.referralNetwork.stats.totalReferrers'),
-      value: data.total_referrers.toLocaleString(),
-    },
-    {
-      label: t('admin.referralNetwork.stats.totalCampaigns'),
-      value: data.total_campaigns.toLocaleString(),
-    },
-    {
-      label: t('admin.referralNetwork.stats.totalEarnings'),
-      value: `${formatKopeksToRubles(data.total_earnings_kopeks)} ₽`,
-    },
-  ];
-
   return (
     <div
       className={`rounded-xl border border-dark-700/50 bg-dark-900/80 p-2 backdrop-blur-md sm:p-3 ${className ?? ''}`}
     >
-      <div className="grid grid-cols-1 gap-1.5 sm:grid-cols-2 sm:gap-3">
-        {stats.map((stat) => (
-          <div key={stat.label}>
-            <p className="text-[10px] font-medium uppercase tracking-wider text-dark-500">
-              {stat.label}
-            </p>
-            <p className="font-mono text-sm font-semibold text-dark-100">{stat.value}</p>
-          </div>
-        ))}
+      <div className="grid grid-cols-2 gap-x-4 gap-y-1.5 sm:gap-x-6 sm:gap-y-2">
+        <div>
+          <p className="text-[10px] font-medium uppercase tracking-wider text-dark-500">
+            {t('admin.referralNetwork.stats.totalUsers')}
+          </p>
+          <p className="font-mono text-sm font-semibold text-dark-100">
+            {data.total_users.toLocaleString()}
+          </p>
+        </div>
+        <div>
+          <p className="text-[10px] font-medium uppercase tracking-wider text-dark-500">
+            {t('admin.referralNetwork.stats.totalReferrers')}
+          </p>
+          <p className="font-mono text-sm font-semibold text-dark-100">
+            {data.total_referrers.toLocaleString()}
+          </p>
+        </div>
+        <div>
+          <p className="text-[10px] font-medium uppercase tracking-wider text-dark-500">
+            {t('admin.referralNetwork.stats.totalCampaigns')}
+          </p>
+          <p className="font-mono text-sm font-semibold text-dark-100">
+            {data.total_campaigns.toLocaleString()}
+          </p>
+        </div>
+        <div>
+          <p className="text-[10px] font-medium uppercase tracking-wider text-dark-500">
+            {t('admin.referralNetwork.stats.subscriptionRevenue')}
+          </p>
+          <p className="font-mono text-sm font-semibold text-accent-400">
+            {formatKopeksToRubles(data.total_subscription_revenue_kopeks)} ₽
+          </p>
+        </div>
+        <div className="col-span-2 border-t border-dark-700/30 pt-1.5">
+          <p className="text-[10px] font-medium uppercase tracking-wider text-dark-500">
+            {t('admin.referralNetwork.stats.totalEarnings')}
+          </p>
+          <p className="font-mono text-sm font-semibold text-dark-100">
+            {formatKopeksToRubles(data.total_earnings_kopeks)} ₽
+          </p>
+        </div>
       </div>
     </div>
   );

src/types/referralNetwork.ts

@@ -51,6 +51,7 @@ export interface NetworkGraphData {
   total_referrers: number;
   total_campaigns: number;
   total_earnings_kopeks: number;
+  total_subscription_revenue_kopeks: number;
 }
 
 export interface NetworkUserDetail {