Enhance admin endpoints and queries for improved filtering and management

- Updated `ListPaymentRequestsQuery` to include `Kind` and `Search` parameters for better filtering of payment requests.
- Enhanced `ListAuditLogsQuery` to support additional filters: `Source`, `TargetType`, and `Action`, improving audit log retrieval.
- Modified `ListUsersQuery` to accept new filters: `RoleId`, `IsActivated`, `IsBlocked`, and `BillingExpired`, allowing for more granular user management.
- Introduced `DeleteInbound` endpoint to allow deletion of inbounds that are not currently available, enhancing inbound management capabilities.
- Updated frontend API calls to reflect new query parameters and support for additional filtering options in the admin interface.
- Revised API documentation to include new parameters and endpoint functionalities for better clarity and usage guidance.

backend/src/PnvPanel.Application/Admin/Billing/ListPaymentRequestsQueryHandler.cs

@@ -21,6 +21,18 @@ public sealed class ListPaymentRequestsQueryHandler(
         var requestsQuery = dbContext.PaymentRequests.AsNoTracking();
         if (query.StatusFilter is { } status)
             requestsQuery = requestsQuery.Where(r => r.Status == status);
+        if (query.KindFilter is { } kind)
+            requestsQuery = requestsQuery.Where(r => r.Kind == kind);
+        if (!string.IsNullOrWhiteSpace(query.Search))
+        {
+            // PaymentRequest хранит только UserId — резолвим совпадающих пользователей ДО пагинации
+            // (иначе "поиск по имени" фильтровал бы уже отобранную страницу, а не весь набор).
+            var matchingUserIds = await identityService.FindUserIdsByUserNameAsync(
+                query.Search.Trim(),
+                cancellationToken
+            );
+            requestsQuery = requestsQuery.Where(r => matchingUserIds.Contains(r.UserId));
+        }
 
         var page1 = await requestsQuery
             .OrderByDescending(r => r.CreatedAt)