fix(node): iterate dict copies in WebRTC peer broadcast and close_all

Concurrent peer disconnects could mutate _peers/_sessions during
iteration, causing RuntimeError: dictionary changed size during iteration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py b/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
index 07ceed3..6231310 100644
--- a/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
+++ b/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
@@ -288,7 +288,7 @@ class WebRTCPeerSession:
             "thread_id": msg.get("thread_id"),
             "timestamp": __import__("time").time(),
         }
-        for uid, session in peers.items():
+        for uid, session in list(peers.items()):
             if uid != self._user_id and session is not self:
                 try:
                     session._send(broadcast)
@@ -491,7 +491,7 @@ class WebRTCTransport:
             await session.close()
 
     async def close_all(self) -> None:
-        for session in self._sessions.values():
+        for session in list(self._sessions.values()):
             await session.close()
         self._sessions.clear()