[txp666]

• New UdpConfigCard (UDP 配置):
  • It binds a local port (defaultLocalPort, 0 lets the system choose) and sends to defaultHost:defaultPort.
  • With no remote host it answers the last sender, and it refuses to start when both the host and the local port are empty.
  • A broadcast address broadcasts.
  • Every datagram is one frame, as MQTT messages are, so all parsers work on it.
  • The Modbus master, poller and slave run over it (modbus_tcp framing, or RTU/ASCII), and the slave always answers the asker.
  • It owns its link like the other cards and exports with the app.
• Docs: the UDP card in uidp-format.md, uidp-widgets.md, protocol.md and the READMEs. Bluetooth is dropped from the roadmap, together with a stale "English interface planned" line.
• Fixes the intermittent segfault at interpreter exit in test child processes, seen in CI on macOS-Intel / Python 3.12 and Windows / Python 3.14:
  • PyQt's exit hook (cleanup_on_exit) deletes Python-owned QObjects while it walks sip's wrapper table. When one of those deletions runs Python that wraps new objects, sip can free the table being walked.
  • tests/orderly_exit.py deletes those objects first, from an atexit hook that runs before PyQt's, and every test child starts with its one-line prelude.
  • The designer and exported apps already tear down in order before exiting.

Checked:

• The full suite (232 tests) passes.
• A pymodbus UDP master passed all 16 Modbus checks against an exported app with a UDP slave card: reads, 05/06/0F/10 writes read back, live widget updates, exception codes 01/02/03, and an unknown unit getting no reply.
• The exit crash reproduced 6 times in 1000 runs on x86_64 Python 3.12 before the fix, and 0 times in 1000 after it.

🤖 Generated with Claude Code