支持从.env同步管理员密码；新增reset_admin.py

Co-authored-by: Cursor <cursoragent@cursor.com>

reset_admin.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+"""从 .env 重置管理员账号（服务器上忘记密码时使用）"""
+import os
+import sys
+
+from dotenv import load_dotenv
+from werkzeug.security import generate_password_hash
+
+BASE = os.path.dirname(os.path.abspath(__file__))
+load_dotenv(os.path.join(BASE, ".env"))
+
+sys.path.insert(0, BASE)
+from app import set_setting, get_setting  # noqa: E402
+
+username = os.getenv("ADMIN_USERNAME", "admin").strip() or "admin"
+password = os.getenv("ADMIN_PASSWORD", "").strip()
+if not password or password == "change-me-on-first-login":
+    print("请在 .env 中设置 ADMIN_PASSWORD 后再运行此脚本")
+    sys.exit(1)
+
+old_username = get_setting("admin_username")
+set_setting("admin_username", username)
+set_setting("admin_password_hash", generate_password_hash(password))
+print(f"已重置管理员: {username}（原账号: {old_username or '无'}）")