新增系统配置页（运营管理系统后台）

backend/package.json

@@ -12,6 +12,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "@types/nodemailer": "^7.0.4",
     "axios": "^1.13.2",
     "bcrypt": "^6.0.0",
     "cors": "^2.8.5",
@@ -19,6 +20,8 @@
     "express": "^5.2.1",
     "jsonwebtoken": "^9.0.3",
     "mysql2": "^3.16.0",
+    "nodemailer": "^7.0.12",
+    "svg-captcha": "^1.4.0",
     "typeorm": "^0.3.28"
   },
   "devDependencies": {