fix: 调试配置和环境变量路径调整，确保读取 backend 目录下的 .env 文件

backend/package-lock.json

@@ -20,6 +20,7 @@
         "express-rate-limit": "^7.1.0",
         "ioredis": "^5.3.0",
         "node-cron": "^3.0.0",
+        "pnpm": "^10.10.0",
         "redis": "^5.0.1",
         "swagger-jsdoc": "^6.2.8",
         "swagger-ui-express": "^5.0.1",
@@ -4504,6 +4505,22 @@
         "node": ">=8"
       }
     },
+    "node_modules/pnpm": {
+      "version": "10.10.0",
+      "resolved": "https://registry.npmjs.org/pnpm/-/pnpm-10.10.0.tgz",
+      "integrity": "sha512-1hXbJG/nDyXc/qbY1z3ueCziPiJF48T2+Igkn7VoFJMYY33Kc8LFyO8qTKDVZX+5VnGIv6tH9WbR7mzph4FcOQ==",
+      "license": "MIT",
+      "bin": {
+        "pnpm": "bin/pnpm.cjs",
+        "pnpx": "bin/pnpx.cjs"
+      },
+      "engines": {
+        "node": ">=18.12"
+      },
+      "funding": {
+        "url": "https://opencollective.com/pnpm"
+      }
+    },
     "node_modules/pretty-format": {
       "version": "29.7.0",
       "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-29.7.0.tgz",