Add instance nav prefs, env config UI, and PM2 restart.

P1-P4: configurable nav/section visibility in system settings, full .env editor with restart badges, password change, runtime hot overrides, and single-instance pm2 restart. Works in hub embed iframe.
Co-authored-by: Cursor <cursoragent@cursor.com>

lib/instance/instance_pm2_lib.py

@@ -0,0 +1,49 @@
+"""PM2 重启当前实例（仅 Linux 部署环境）。"""
+from __future__ import annotations
+
+import os
+import subprocess
+import sys
+from typing import Any
+
+
+def default_pm2_app_name(exchange_key: str) -> str:
+    mapping = {
+        "okx": "crypto_okx",
+        "binance": "crypto_binance",
+        "gate": "crypto_gate",
+    }
+    return mapping.get((exchange_key or "").strip().lower(), "crypto_okx")
+
+
+def resolve_pm2_app_name(exchange_key: str) -> str:
+    explicit = (os.getenv("PM2_APP_NAME") or "").strip()
+    if explicit:
+        return explicit
+    return default_pm2_app_name(exchange_key)
+
+
+def restart_instance_pm2(exchange_key: str) -> dict[str, Any]:
+    if not sys.platform.startswith("linux"):
+        return {"ok": False, "msg": "仅 Linux 服务器支持 PM2 重启", "app": None}
+    app_name = resolve_pm2_app_name(exchange_key)
+    try:
+        proc = subprocess.run(
+            ["pm2", "restart", app_name, "--update-env"],
+            capture_output=True,
+            text=True,
+            timeout=120,
+        )
+        ok = proc.returncode == 0
+        return {
+            "ok": ok,
+            "app": app_name,
+            "msg": (proc.stdout or proc.stderr or "").strip()[:500],
+            "returncode": proc.returncode,
+        }
+    except FileNotFoundError:
+        return {"ok": False, "msg": "未找到 pm2 命令", "app": app_name}
+    except subprocess.TimeoutExpired:
+        return {"ok": False, "msg": "pm2 restart 超时", "app": app_name}
+    except Exception as e:
+        return {"ok": False, "msg": str(e), "app": app_name}