feat: add recharts analytics to admin campaign stats page

- Move shared chart components (DailyChart, PeriodComparison, StatCard) to src/components/stats/ with configurable label props
- Create shared types for chart data decoupled from partner API
- Add campaign chart data API client with deposits/spending split
- Enhance AdminCampaignStats with daily trends chart, period comparison, top registrations, and deposit/spending stat cards
- Add useChartColors hook with SSR guard and theme-aware CSS variable parsing
- Add cross-platform clipboard utility with execCommand fallback for Telegram WebView
- Add i18n keys for chart analytics across all 4 locales (en, ru, zh, fa)
- Responsive fixes: truncation for long names/values, responsive text sizing, touch-friendly copy buttons

src/locales/en.json

@@ -750,6 +750,28 @@
         "tariff": "Bonus tariff",
         "tariffDesc": "Free tariff plan"
       },
+      "stats": {
+        "registrations": "Registrations",
+        "referrals": "Referrals",
+        "earnings": "Earnings",
+        "conversionRate": "Conversion",
+        "today": "Today",
+        "week": "Week",
+        "month": "Month",
+        "showDetails": "Details",
+        "hideDetails": "Collapse",
+        "vsLastWeek": "vs last week",
+        "topReferrals": "Top Referrals",
+        "noData": "No data",
+        "dailyChart": "30-day trends",
+        "periodComparison": "Period comparison",
+        "noReferrals": "No referrals yet",
+        "paid": "Paid",
+        "pending": "Pending",
+        "active": "Active",
+        "referralsCount": "Referrals",
+        "earningsAmount": "Earned"
+      },
       "fields": {
         "companyName": "Company Name",
         "companyNamePlaceholder": "Your company or brand name",
@@ -1991,7 +2013,17 @@
         "users": "Users",
         "noUsers": "No registered users",
         "paid": "Paid",
-        "hasSub": "Has sub"
+        "hasSub": "Has sub",
+        "dailyChart": "30-day trends",
+        "chartRegistrations": "Registrations",
+        "chartRevenue": "Revenue",
+        "totalDeposits": "Total Deposits",
+        "totalSpending": "Subscription Spending",
+        "periodComparison": "Period comparison",
+        "vsLastWeek": "vs last week",
+        "topRegistrations": "Top registrations",
+        "noRegistrations": "No registrations yet",
+        "chartLoading": "Loading chart data..."
       },
       "users": {
         "title": "Campaign Users",

src/locales/fa.json

@@ -584,6 +584,28 @@
         "tariff": "تعرفه جایزه",
         "tariffDesc": "طرح تعرفه رایگان"
       },
+      "stats": {
+        "registrations": "ثبت‌نام",
+        "referrals": "معرفی‌شده‌ها",
+        "earnings": "درآمد",
+        "conversionRate": "نرخ تبدیل",
+        "today": "امروز",
+        "week": "هفته",
+        "month": "ماه",
+        "showDetails": "جزئیات",
+        "hideDetails": "بستن",
+        "vsLastWeek": "مقایسه با هفته قبل",
+        "topReferrals": "برترین معرفی‌شده‌ها",
+        "noData": "داده‌ای نیست",
+        "dailyChart": "روند ۳۰ روزه",
+        "periodComparison": "مقایسه دوره‌ها",
+        "noReferrals": "هنوز معرفی‌شده‌ای نیست",
+        "paid": "پرداخت شده",
+        "pending": "در انتظار",
+        "active": "فعال",
+        "referralsCount": "تعداد معرفی",
+        "earningsAmount": "کسب شده"
+      },
       "fields": {
         "companyName": "نام شرکت",
         "companyNamePlaceholder": "نام شرکت یا برند شما",
@@ -1670,7 +1692,17 @@
         "users": "کاربران",
         "noUsers": "کاربر ثبت‌نام شده‌ای وجود ندارد",
         "paid": "پرداخت کرده",
-        "hasSub": "دارای اشتراک"
+        "hasSub": "دارای اشتراک",
+        "dailyChart": "روند ۳۰ روزه",
+        "chartRegistrations": "ثبت‌نام‌ها",
+        "chartRevenue": "درآمد",
+        "totalDeposits": "کل واریزی‌ها",
+        "totalSpending": "هزینه اشتراک",
+        "periodComparison": "مقایسه دوره‌ها",
+        "vsLastWeek": "نسبت به هفته قبل",
+        "topRegistrations": "بالاترین ثبت‌نام‌ها",
+        "noRegistrations": "هنوز ثبت‌نامی وجود ندارد",
+        "chartLoading": "در حال بارگذاری..."
       },
       "users": {
         "title": "کاربران کمپین",

src/locales/ru.json

@@ -778,6 +778,28 @@
         "tariff": "Бонусный тариф",
         "tariffDesc": "Бесплатный тарифный план"
       },
+      "stats": {
+        "registrations": "Регистрации",
+        "referrals": "Рефералы",
+        "earnings": "Заработок",
+        "conversionRate": "Конверсия",
+        "today": "Сегодня",
+        "week": "Неделя",
+        "month": "Месяц",
+        "showDetails": "Подробнее",
+        "hideDetails": "Свернуть",
+        "vsLastWeek": "vs прошлая неделя",
+        "topReferrals": "Топ рефералы",
+        "noData": "Нет данных",
+        "dailyChart": "Динамика за 30 дней",
+        "periodComparison": "Сравнение периодов",
+        "noReferrals": "Пока нет рефералов",
+        "paid": "Оплатил",
+        "pending": "Ожидание",
+        "active": "Активен",
+        "referralsCount": "Рефералов",
+        "earningsAmount": "Заработано"
+      },
       "fields": {
         "companyName": "Название компании",
         "companyNamePlaceholder": "Название вашей компании или бренда",
@@ -2512,7 +2534,17 @@
         "users": "Пользователи",
         "noUsers": "Нет зарегистрированных пользователей",
         "paid": "Платил",
-        "hasSub": "Подписка"
+        "hasSub": "Подписка",
+        "dailyChart": "Динамика за 30 дней",
+        "chartRegistrations": "Регистрации",
+        "chartRevenue": "Доход",
+        "totalDeposits": "Всего пополнений",
+        "totalSpending": "Расход на подписки",
+        "periodComparison": "Сравнение периодов",
+        "vsLastWeek": "vs прошлая неделя",
+        "topRegistrations": "Топ регистрации",
+        "noRegistrations": "Пока нет регистраций",
+        "chartLoading": "Загрузка данных..."
       },
       "users": {
         "title": "Пользователи кампании",

src/locales/zh.json

@@ -584,6 +584,28 @@
         "tariff": "奖励套餐",
         "tariffDesc": "免费套餐方案"
       },
+      "stats": {
+        "registrations": "注册",
+        "referrals": "推荐",
+        "earnings": "收入",
+        "conversionRate": "转化率",
+        "today": "今天",
+        "week": "本周",
+        "month": "本月",
+        "showDetails": "详情",
+        "hideDetails": "收起",
+        "vsLastWeek": "对比上周",
+        "topReferrals": "热门推荐",
+        "noData": "暂无数据",
+        "dailyChart": "30天趋势",
+        "periodComparison": "周期对比",
+        "noReferrals": "暂无推荐",
+        "paid": "已付款",
+        "pending": "待处理",
+        "active": "活跃",
+        "referralsCount": "推荐数",
+        "earningsAmount": "收入"
+      },
       "fields": {
         "companyName": "公司名称",
         "companyNamePlaceholder": "您的公司或品牌名称",
@@ -1669,7 +1691,17 @@
         "users": "用户",
         "noUsers": "没有注册用户",
         "paid": "已付费",
-        "hasSub": "有订阅"
+        "hasSub": "有订阅",
+        "dailyChart": "30天趋势",
+        "chartRegistrations": "注册",
+        "chartRevenue": "收入",
+        "totalDeposits": "总充值",
+        "totalSpending": "订阅支出",
+        "periodComparison": "期间比较",
+        "vsLastWeek": "与上周对比",
+        "topRegistrations": "热门注册",
+        "noRegistrations": "暂无注册",
+        "chartLoading": "加载图表数据..."
       },
       "users": {
         "title": "活动用户",