feat: add purchases list with pagination to landing stats page

Add card-based purchase list below charts with:
- Status filter dropdown (all/pending/paid/delivered/etc)
- Paginated card list with contact, gift recipient, tariff, price
- Status badges, responsive mobile/desktop layout
- Translations for ru/en

src/locales/en.json

@@ -3249,6 +3249,31 @@
         "funnel": "Funnel",
         "loadError": "Failed to load statistics",
         "noPurchases": "No purchases"
+      },
+      "purchases": {
+        "title": "Purchases",
+        "contact": "Contact",
+        "recipient": "Recipient",
+        "tariff": "Tariff",
+        "period": "Period",
+        "days": "days",
+        "price": "Price",
+        "method": "Method",
+        "date": "Date",
+        "gift": "Gift",
+        "forSelf": "For self",
+        "allStatuses": "All statuses",
+        "status_pending": "Pending",
+        "status_paid": "Paid",
+        "status_delivered": "Delivered",
+        "status_pending_activation": "Pending activation",
+        "status_failed": "Failed",
+        "status_expired": "Expired",
+        "noPurchases": "No purchases",
+        "showing": "Showing {{from}}\u2013{{to}} of {{total}}",
+        "page": "Page {{current}} of {{total}}",
+        "prev": "Previous",
+        "next": "Next"
       }
     }
   },