chore: sync current workspace changes

backend/api/runtime.py

@@ -389,11 +389,21 @@ def _find_available_port(start_port: int = 8765, max_port: int = 9000) -> int:
 
 
 def _is_gateway_running() -> bool:
-    """Check if Gateway process is running."""
+    """Check if Gateway process is running.
+
+    Checks both the internally-managed gateway process and falls back to
+    port availability (for externally-managed gateway processes).
+    """
     process = _runtime_state.gateway_process
-    if process is None:
+    if process is not None and process.poll() is None:
+        return True
+    # Fallback: check if the gateway port is in use (for externally started gateway)
+    import socket
+    try:
+        with socket.create_connection(("127.0.0.1", _runtime_state.gateway_port), timeout=1):
+            return True
+    except OSError:
         return False
-    return process.poll() is None
 
 
 def _stop_gateway() -> bool: