feat(landing-stats): rebuild charts on shared components + add funnel & breakdowns

The landing stats page rendered raw recharts by hand plus a bespoke progress-bar
list, looking nothing like the Sales/Remnawave stats. Rebuild it on the shared
chart components and add the visualizations the data warrants:

- Daily: MultiSeriesAreaChart (created/paid) + SimpleAreaChart (revenue),
  replacing the hand-rolled area chart and the custom progress-bar list.
- Tariff & traffic sources: BreakdownList; payment methods & gift composition:
  DonutChart — all the same components Sales stats uses.
- New conversion Funnel (created → paid) and a Gift activation card
  (claimed/sent + rate), backed by the new backend breakdowns.
- Containers use the bento-card surface; i18n added in ru/en/zh/fa.

src/locales/en.json

@@ -3978,6 +3978,12 @@
         "dailyChart": "Purchases & Revenue by Day",
         "tariffChart": "Tariff Distribution",
         "giftBreakdown": "Gifts vs Regular",
+        "funnelTitle": "Conversion funnel",
+        "giftClaimTitle": "Gift activation",
+        "giftClaimLabel": "claimed / sent",
+        "dailyRevenue": "Daily revenue",
+        "byPaymentMethod": "By payment method",
+        "bySource": "Traffic sources",
         "purchases": "Purchases",
         "revenueLabel": "Revenue",
         "gifts": "Gifts",

src/locales/fa.json

@@ -3694,6 +3694,12 @@
         "dailyChart": "خرید و درآمد روزانه",
         "tariffChart": "توزیع طرح‌ها",
         "giftBreakdown": "هدایا در مقابل عادی",
+        "funnelTitle": "قیف تبدیل",
+        "giftClaimTitle": "فعال‌سازی هدیه",
+        "giftClaimLabel": "دریافت‌شده / ارسال‌شده",
+        "dailyRevenue": "درآمد روزانه",
+        "byPaymentMethod": "بر اساس روش پرداخت",
+        "bySource": "منابع ترافیک",
         "purchases": "خریدها",
         "revenueLabel": "درآمد",
         "gifts": "هدایا",

src/locales/ru.json

@@ -4523,6 +4523,12 @@
         "dailyChart": "Покупки и доход по дням",
         "tariffChart": "Распределение по тарифам",
         "giftBreakdown": "Подарки vs обычные",
+        "funnelTitle": "Воронка конверсии",
+        "giftClaimTitle": "Активация подарков",
+        "giftClaimLabel": "забрано / отправлено",
+        "dailyRevenue": "Выручка по дням",
+        "byPaymentMethod": "По способам оплаты",
+        "bySource": "Источники трафика",
         "purchases": "Покупки",
         "revenueLabel": "Доход",
         "gifts": "Подарки",

src/locales/zh.json

@@ -3693,6 +3693,12 @@
         "dailyChart": "每日购买与收入",
         "tariffChart": "套餐分布",
         "giftBreakdown": "礼物 vs 普通",
+        "funnelTitle": "转化漏斗",
+        "giftClaimTitle": "礼物激活",
+        "giftClaimLabel": "已领取 / 已发送",
+        "dailyRevenue": "每日收入",
+        "byPaymentMethod": "按支付方式",
+        "bySource": "流量来源",
         "purchases": "购买",
         "revenueLabel": "收入",
         "gifts": "礼物",