Add automatic CPA Management API import after mint

Upload xai-*.json to POST /v0/management/auth-files when cpa_auto_import_remote is enabled. Failures are logged only and never block registration.

config.example.json

@@ -131,6 +131,16 @@
   "cpa_copy_to_hotload": false,
   "// cpa_hotload_dir": "CPA 容器/进程挂载的 auth-dir（copy_to_hotload=true 时生效）",
   "cpa_hotload_dir": "",
+  "// cpa_auto_import_remote": "写出 xai-*.json 后是否自动 POST 到 CPA Management API 导入",
+  "cpa_auto_import_remote": false,
+  "// cpa_remote_base": "CPA 根地址，只填到端口即可，如 http://127.0.0.1:8317（程序自动拼 /v0/management/auth-files）",
+  "cpa_remote_base": "",
+  "// cpa_remote_password": "CPA 管理密码（MANAGEMENT_PASSWORD / remote-management.secret-key 原文）。也可用环境变量 CPA_REMOTE_PASSWORD",
+  "cpa_remote_password": "",
+  "// cpa_remote_import_retries": "远程导入失败重试次数",
+  "cpa_remote_import_retries": 3,
+  "// cpa_remote_import_retry_delay": "远程导入重试间隔（秒）",
+  "cpa_remote_import_retry_delay": 2,
   "// cpa_base_url": "免费 Build 必须是 cli-chat-proxy，不要写成 api.x.ai",
   "cpa_base_url": "https://cli-chat-proxy.grok.com/v1",
   "// cpa_proxy": "OIDC mint 专用代理（device-code/token/probe/浏览器）。优先级: cpa_proxy > proxy > 环境 https_proxy。空=用 proxy。",