Add Windows Chrome side panel and scoped IDE native bridge

tui_gateway/server.py

@@ -2613,7 +2613,17 @@ def write_json(obj: dict) -> bool:
             from tui_gateway.event_replay import _stamp_event
 
             _stamp_event(obj)
-            return t.write(obj)
+            # Desktop and its Chrome companion may view the same running task.
+            # Stamp once, then fan out to each attached viewer exactly once.
+            # Keep ownership for lifecycle/requests; observers do not own work.
+            viewers = list(((_sessions.get(sid) or {}).get("viewers") or {}).keys())
+            delivered = False
+            for viewer in dict.fromkeys([t, *viewers]):
+                try:
+                    delivered = viewer.write(obj) or delivered
+                except Exception:
+                    logger.debug("Session viewer disconnected during event delivery")
+            return delivered
 
     from tui_gateway.event_replay import _stamp_event
 
@@ -11430,6 +11440,9 @@ def _live_session_payload(
         if cols is not None:
             session["cols"] = cols
         if transport is not None:
+            previous_transport = session.get("transport")
+            if previous_transport is not None and previous_transport is not _detached_ws_transport:
+                session.setdefault("viewers", {})[previous_transport] = time.time()
             session["transport"] = transport
             # Track every transport that has shown this session (multi-window:
             # pop-out windows each resume the same sid). The last viewer