fix: 添加 SSO token type 字段

app/sso

@@ -108,6 +108,7 @@ def create_access_token(user: dict) -> str:
         "sub": str(user["id"]),
         "username": user["username"],
         "role": user.get("role", "visitor"),
+        "type": "access",  # ← 添加 type 字段用于标识 token 类型
         "exp": expire,
         "iat": datetime.utcnow()
     }