feat: multi-select scope for referral network graph

Replace single-select scope with multi-select supporting multiple
campaigns, partners, and users simultaneously. Chips UI with remove
buttons, clear-all, sorted query keys for cache stability.

src/locales/fa.json

@@ -1140,7 +1140,10 @@
         "campaigns": "کمپین‌ها",
         "active": "فعال",
         "inactive": "غیرفعال",
-        "noResults": "نتیجه‌ای یافت نشد"
+        "noResults": "نتیجه‌ای یافت نشد",
+        "removeItem": "حذف {{label}}",
+        "clearAll": "پاک کردن همه انتخاب‌ها",
+        "addScope": "افزودن محدوده"
       },
       "loading": "بارگذاری گراف...",
       "error": "خطا در بارگذاری داده‌های شبکه",