netcode-revival: log relay sweeps + show netcode transport state in the M menu

- Relay --verbose now logs which client timed out (ip:port, session, room)
  instead of silently dropping, so '2 client(s) -> 1 client(s)' is
  explainable.
- The M menu Status block shows the netcode transport state: 'Netcode:
  relay joined / not connected' and how many sessions are discoverable,
  so the RakNet pipeline is visible without grepping logs.
- Pin rexglue to 3ec27d1 (transport receive timeout - the silent-client
  disconnect fix).

src/native/skate3_native_ghost_relay.cpp

@@ -489,10 +489,20 @@ void GhostRelay::Sweep(double now) {
   if (now <= 0.0) {
     return;
   }
-  clients_.erase(std::remove_if(clients_.begin(), clients_.end(),
-                                [now](const Client& c) {
-                                  return now - c.last_seen > kClientTimeoutSec;
-                                }),
+  const bool verbose = verbose_.load(std::memory_order_relaxed);
+  clients_.erase(std::remove_if(
+                    clients_.begin(), clients_.end(),
+                    [now, verbose](const Client& c) {
+                      const bool stale = now - c.last_seen > kClientTimeoutSec;
+                      if (stale && verbose) {
+                        GHOST_RELAY_INFO("{} timed out ({}s silence; {} joined "
+                                         "room '{}')",
+                                         GhostAddrStr(c.addr),
+                                         int(now - c.last_seen), c.session_id,
+                                         std::string(c.room, c.room_len));
+                      }
+                      return stale;
+                    }),
                  clients_.end());
 }
 

src/skate3_native_ghost_dialog.cpp

@@ -3,11 +3,13 @@
 #include <cmath>
 #include <cstring>
 #include <string>
+#include <vector>
 
 #include <imgui.h>
 
 #include <rex/cvar.h>
 #include <rex/logging.h>
+#include <rex/system/xnet_transport.h>
 
 #include "native/skate3_native_ghost.h"
 #include "skate3_native_scene.h"
@@ -216,6 +218,20 @@ void GhostDialog::OnDraw(ImGuiIO& io) {
   if (st.peer[0] != '\0') {
     ImGui::Text("  Relay:        %s", st.peer);
   }
+  // netcode-revival: the game's own netcode transport (RakNet via the relay).
+  {
+    using rex::system::XNetTransport;
+    ImGui::Text("  Netcode:      %s",
+                XNetTransport::Instance().Active()
+                    ? "relay joined"
+                    : "not connected");
+    const std::vector<rex::system::XNetSession> xnet_sessions =
+        XNetTransport::Instance().Sessions();
+    if (!xnet_sessions.empty()) {
+      ImGui::Text("  Sessions:     %zu discoverable",
+                  xnet_sessions.size());
+    }
+  }
   if (st.refused) {
     ImGui::TextColored(ImVec4(1.0f, 0.5f, 0.3f, 1.0f),
                        "  Refused by relay (protocol version mismatch)");

third_party/rexglue-sdk

@@ -1 +1 @@
-Subproject commit 01fe706c13038c861e028b52384c3922c98e80da
+Subproject commit 3ec27d115b0a6ff3ac20fe4486239150c3872e25