YueGuobin acce79d243
refactor: unify MCP handlers to use http_call directly, relocate node file ops to Node class
- Move node file operations (list_files, delete_file) from Gns3Connector to Node class
- Add link capture/reset operations (reset, start_capture, stop_capture) to Link class
- Convert all MCP handlers to use conn.http_call() directly instead of
  Gns3Connector/Node/Link abstraction methods
- Register 4 new MCP tools: reset_link, start_capture, stop_capture,
  download_capture_file
2026-06-10 13:47:10 +08:00
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