diff --git a/src/OpenClaw.Shared/Models.cs b/src/OpenClaw.Shared/Models.cs
index f9fbef9..06ca322 100644
--- a/src/OpenClaw.Shared/Models.cs
+++ b/src/OpenClaw.Shared/Models.cs
@@ -182,17 +182,16 @@ public class SessionInfo
         get
         {
             var prefix = IsMain ? "Main" : "Sub";
-            var parts = new List<string> { prefix };
-
-            if (!string.IsNullOrEmpty(Channel))
-                parts.Add(Channel);
-
-            if (!string.IsNullOrEmpty(CurrentActivity))
-                parts.Add(CurrentActivity);
-            else if (!string.IsNullOrEmpty(Status) && Status != "unknown" && Status != "active")
-                parts.Add(Status);
-
-            return string.Join(" · ", parts);
+            string? mid = !string.IsNullOrEmpty(Channel) ? Channel : null;
+            string? end = !string.IsNullOrEmpty(CurrentActivity) ? CurrentActivity
+                : (!string.IsNullOrEmpty(Status) && Status != "unknown" && Status != "active" ? Status : null);
+            return (mid, end) switch
+            {
+                (null, null) => prefix,
+                (not null, null) => $"{prefix} · {mid}",
+                (null, not null) => $"{prefix} · {end}",
+                _ => $"{prefix} · {mid} · {end}",
+            };
         }
     }
 
diff --git a/src/OpenClaw.Shared/OpenClawGatewayClient.cs b/src/OpenClaw.Shared/OpenClawGatewayClient.cs
index 05189f5..b7a7428 100644
--- a/src/OpenClaw.Shared/OpenClawGatewayClient.cs
+++ b/src/OpenClaw.Shared/OpenClawGatewayClient.cs
@@ -1358,14 +1358,14 @@ public class OpenClawGatewayClient : WebSocketClientBase
 
     private SessionInfo[] GetSessionListInternal()
     {
-        var list = new List<SessionInfo>(_sessions.Values);
-        list.Sort((a, b) =>
+        var result = new SessionInfo[_sessions.Count];
+        _sessions.Values.CopyTo(result, 0);
+        Array.Sort(result, static (a, b) =>
         {
-            // Main session first, then by last seen
             if (a.IsMain != b.IsMain) return a.IsMain ? -1 : 1;
             return b.LastSeen.CompareTo(a.LastSeen);
         });
-        return list.ToArray();
+        return result;
     }
 
     // --- Parsing helpers ---