fix mcp close

Author: ollmer

src/agentlab/backends/browser/mcp.py

@@ -134,9 +134,12 @@ def actions(self) -> tuple[ToolSpec]:
             for tool in self.tools.values()
         )
 
-    async def close(self) -> None:
+    async def aclose(self) -> None:
         await self.exit_stack.aclose()
 
+    def close(self) -> None:
+        self.loop.run_until_complete(self.aclose())
+
 
 class MCPBrowserBackend(BrowserBackend):
     config_path: str
@@ -166,4 +169,7 @@ def actions(self) -> tuple[ToolSpec]:
         return list(self._mcp.actions())
 
     def close(self) -> None:
-        self._mcp.close()
+        try:
+            self._mcp.close()
+        except Exception:
+            pass