fix: align traffic top-up flows and unlimited overrides

backend/bot/app/web/admin_api_impl/users.py

@@ -1031,7 +1031,7 @@ async def admin_user_premium_override_route(request: web.Request) -> web.Respons
 
 
 async def admin_user_regular_traffic_override_route(request: web.Request) -> web.Response:
-    """Main (regular) traffic: unlimited-style ceiling + admin bonus GB."""
+    """Main (regular) traffic: native unlimited panel limit + admin bonus GB."""
     actor_id = _require_admin_user_id(request)
     target_id = int(request.match_info["user_id"])
     settings: Settings = request.app["settings"]

backend/bot/services/subscription_service_impl/tariffs.py

@@ -112,15 +112,14 @@ class TariffMixin:
         regular_unlimited_override: bool,
         traffic_used_bytes: int,
     ) -> int:
-        """Numeric cap sent to the panel; ``regular_unlimited_override`` uses a large practical ceiling."""  # noqa: E501
+        """Numeric cap sent to the panel; Remnawave treats ``0`` as unlimited."""
         floor = (
             int(tier_baseline_bytes or 0)
             + max(0, int(topup_balance_bytes or 0))
             + max(0, int(regular_bonus_bytes or 0))
         )
         if regular_unlimited_override:
-            used = max(0, int(traffic_used_bytes or 0))
-            return max(floor, used + 512 * (1024**3), 1024**5)
+            return 0
         return floor
 
     async def premium_access_for_tariff(self, tariff: Optional[Tariff]) -> Dict[str, Any]: