feat: add portable fp review skill installer

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2026-06-27 1ce0fd70b0d398b5a226a70f10fd5fc065a620fd

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{
  "observer": {
    "server_url": "ws://127.0.0.1:4567",
    "thread_id": "",
    "cwd": "D:/strategy_project/s-system-doc/tianxia-mirror",
    "model": null,
    "approval_policy": "never",
    "sandbox": "danger-full-access"
  }
}