refactor: Remove ICurrentUserService dependency from query handlers and update user ID handling logic

src/CMSMicroservice.Application/NetworkMembershipCQ/Queries/GetNetworkStatistics/GetNetworkStatisticsQuery.cs

@@ -3,7 +3,7 @@ namespace CMSMicroservice.Application.NetworkMembershipCQ.Queries.GetNetworkStat
 public class GetNetworkStatisticsQuery : IRequest<GetNetworkStatisticsResponseDto>
 {
     /// <summary>
-    /// شناسه کاربر برای محاسبه آمار شبکه او - 0 یا null یعنی کاربر جاری
+    /// شناسه کاربر برای محاسبه آمار شبکه او - 0 یعنی آمار کل شبکه (root user)
     /// </summary>
     public long UserId { get; set; }
 }

src/CMSMicroservice.Application/NetworkMembershipCQ/Queries/GetNetworkStatistics/GetNetworkStatisticsQueryHandler.cs

@@ -5,30 +5,33 @@ namespace CMSMicroservice.Application.NetworkMembershipCQ.Queries.GetNetworkStat
 public class GetNetworkStatisticsQueryHandler : IRequestHandler<GetNetworkStatisticsQuery, GetNetworkStatisticsResponseDto>
 {
     private readonly IApplicationDbContext _context;
-    private readonly ICurrentUserService _currentUser;
 
     public GetNetworkStatisticsQueryHandler(
-        IApplicationDbContext context,
-        ICurrentUserService currentUser)
+        IApplicationDbContext context)
     {
         _context = context;
-        _currentUser = currentUser;
     }
 
     public async Task<GetNetworkStatisticsResponseDto> Handle(GetNetworkStatisticsQuery request, CancellationToken cancellationToken)
     {
-        // Get userId - use current user if not specified or is 0
-        var userId = request.UserId == 0
-            ? (long.TryParse(_currentUser.UserId, out var currentUserId) ? currentUserId : 0)
-            : request.UserId;
+        // UserId > 0 → stats for that user's network
+        // UserId == 0 → global stats (find root user of the network)
+        var userId = request.UserId;
+
+        // Get all users (needed for descendant calculation anyway)
+        var allUsers = await _context.Users.ToListAsync(cancellationToken);
 
         if (userId == 0)
         {
-            throw new UnauthorizedAccessException("User ID not found");
+            // Find root user (user with no NetworkParentId)
+            var rootUser = allUsers.FirstOrDefault(x => x.NetworkParentId == null || x.NetworkParentId == 0);
+            if (rootUser != null)
+                userId = rootUser.Id;
+            else if (allUsers.Count > 0)
+                userId = allUsers.First().Id;
+            else
+                throw new InvalidOperationException("No users found in the system");
         }
-
-        // Get all descendants recursively
-        var allUsers = await _context.Users.ToListAsync(cancellationToken);
         var allDescendants = GetAllDescendants(userId, allUsers);
 
         // Statistics for the user's network (all descendants)

src/CMSMicroservice.Application/NetworkMembershipCQ/Queries/GetNetworkTree/GetNetworkTreeQueryHandler.cs

@@ -8,28 +8,23 @@ public class GetNetworkTreeQueryHandler : IRequestHandler<GetNetworkTreeQuery, N
 {
     private readonly IApplicationDbContext _context;
     private readonly ILogger<GetNetworkTreeQueryHandler> _logger;
-    private readonly ICurrentUserService _currentUser;
 
     public GetNetworkTreeQueryHandler(
         IApplicationDbContext context,
-        ILogger<GetNetworkTreeQueryHandler> logger,
-        ICurrentUserService currentUser)
+        ILogger<GetNetworkTreeQueryHandler> logger)
     {
         _context = context;
         _logger = logger;
-        _currentUser = currentUser;
     }
 
     public async Task<NetworkTreeDto?> Handle(GetNetworkTreeQuery request, CancellationToken cancellationToken)
     {
-        // Get userId - use current user if UserId is 0
-        var userId = request.UserId == 0
-            ? (long.TryParse(_currentUser.UserId, out var currentUserId) ? currentUserId : 0)
-            : request.UserId;
+        // UserId must be provided - customer endpoints resolve from JWT before calling
+        var userId = request.UserId;
 
         if (userId == 0)
         {
-            throw new UnauthorizedAccessException("User ID not found");
+            throw new ArgumentException("UserId is required for network tree query");
         }
 
         // Create a new request with the resolved userId