修复了code-server-like服务中的eventlet.hubs.IOClosed错误：当客户端断开连接时，文件描述符被关闭，但后台任务仍在尝试读取，导致eventlet核心代码抛出IOClosed错误。

code-server-like/app/sockets/terminal_service.py

@@ -67,21 +67,35 @@ def read_and_forward_pty_output(fd=None, pid=None, room_id=None,namespace=None):
                 return
             if fd:
                 timeout_sec = 0
-                (data_ready, _, _) = select.select([fd], [], [], timeout_sec)
-                if data_ready:
-                    # output = os.read(fd, max_read_bytes).decode('ascii')
-                    timeout=0.1
-                    try:
-                        output = os.read(fd, max_read_bytes).decode()
-                    except Exception as err:
-                        output = """
-                        ***AQUI WEB TERM ERR***
-                        {}
-                        ***********************
-                        """.format(err)
-                    # the key for different visitor to get different terminal (instead of mixing up)
-                    # is to let the background task push pty response to each one's own (default) ROOM!
-                    namespace.emit("pty_output", {"output": output}, room=room_id)
+                try:
+                    # Check if file descriptor is still valid by trying to select on it
+                    (data_ready, _, _) = select.select([fd], [], [], timeout_sec)
+                    if data_ready:
+                        timeout=0.1
+                        try:
+                            output = os.read(fd, max_read_bytes).decode()
+                        except (OSError, IOError, EOFError) as err:
+                            # File descriptor closed or other IO error, exit gracefully
+                            return
+                        except UnicodeDecodeError as err:
+                            output = """
+                            ***AQUI WEB TERM ERR***
+                            Unicode decode error: {}
+                            ***********************
+                            """.format(err)
+                        # the key for different visitor to get different terminal (instead of mixing up)
+                        # is to let the background task push pty response to each one's own (default) ROOM!
+                        try:
+                            namespace.emit("pty_output", {"output": output}, room=room_id)
+                        except Exception:
+                            # If emit fails, the client is probably disconnected, exit
+                            return
+                except (OSError, IOError) as err:
+                    # File descriptor closed or invalid, exit gracefully
+                    return
+    except Exception as e:
+        # Catch any other unexpected exceptions to prevent server crash
+        pass
     finally:
         # Clean up file descriptor if it's open
         if fd: