add jwt & crypto service

apps/backend/package.json

@@ -27,6 +27,7 @@
     "@nestjs/core": "^11.0.1",
     "@nestjs/passport": "^11.0.5",
     "@nestjs/platform-express": "^11.0.1",
+    "@types/jsonwebtoken": "^9.0.10",
     "@types/passport-local": "^1.0.38",
     "argon2": "^0.44.0",
     "dayjs": "^1.11.13",
@@ -34,6 +35,7 @@
     "ejs": "^3.1.10",
     "i18next": "^25.3.2",
     "i18next-fs-backend": "^2.6.0",
+    "jsonwebtoken": "^9.0.2",
     "kysely": "^0.28.3",
     "nodemailer": "^7.0.5",
     "passport": "^0.7.0",