diff --git a/packages/middleware/points_gate.py b/packages/middleware/points_gate.py
index c24240e51..54f8b7187 100644
--- a/packages/middleware/points_gate.py
+++ b/packages/middleware/points_gate.py
@@ -9,7 +9,6 @@ import asyncio
 import functools
 import inspect
 import logging
-import types
 from collections.abc import Callable
 from typing import Any
 
@@ -27,65 +26,10 @@ def _points_gate_enabled() -> bool:
         from app.config import settings as _settings
 
         return bool(_settings.points_enabled)
-    except Exception:  # pragma: no cover
+    except Exception:  # pragma: no cover - 配置加载失败默认关闭
         return False
 
 
-def _make_wrapper(
-    func: Callable,
-    is_async: bool,
-    scene_key: str,
-    per_unit,
-    unit_field,
-    quantity_field,
-) -> Callable:
-    """在被装饰函数所在模块的 globals 下创建 wrapper。
-
-    关键点：Python 闭包默认在「定义闭包的模块」globals 下查找自由变量。若直接
-    在 points_gate 模块内定义 wrapper，wrapper.__globals__ 将指向本模块，导致
-    FastAPI/Pydantic 在解析函数类型注解（ForwardRef）时找不到路由模块中
-    导入的 Pydantic Model，出现 PydanticUndefinedAnnotation。
-
-    这里通过 types.FunctionType 把 wrapper 的 code 绑定到「被装饰函数所在模块
-    的 globals（补充装饰器内部符号）」，使 wrapper 的 ForwardRef 解析行为
-    与原路由函数一致。
-    """
-    if is_async:
-        async def wrapper(*args: Any, **kwargs: Any) -> Any:
-            if not _points_gate_enabled():
-                return await func(*args, **kwargs)
-            return await _execute_with_gate(
-                func, args, kwargs, scene_key, per_unit, unit_field, quantity_field, is_async=True
-            )
-    else:
-        def wrapper(*args: Any, **kwargs: Any) -> Any:
-            if not _points_gate_enabled():
-                return func(*args, **_filter_kwargs(func, kwargs))
-            return _execute_with_gate(
-                func, args, kwargs, scene_key, per_unit, unit_field, quantity_field, is_async=False
-            )
-
-    # 把闭包所需的内部符号注入到被装饰模块的 globals，避免闭包找不到名字
-    merged_globals: dict = dict(func.__globals__)
-    for _k, _v in (
-        ("_points_gate_enabled", _points_gate_enabled),
-        ("_execute_with_gate", _execute_with_gate),
-        ("_run_async", _run_async),
-        ("_filter_kwargs", _filter_kwargs),
-    ):
-        merged_globals.setdefault(_k, _v)
-
-    new_wrapper = types.FunctionType(
-        wrapper.__code__,
-        merged_globals,
-        wrapper.__name__,
-        wrapper.__defaults__,
-        wrapper.__closure__,
-    )
-    new_wrapper = functools.wraps(func)(new_wrapper)
-    return new_wrapper
-
-
 def points_gate(
     scene_key: str,
     per_unit: int | None = None,
@@ -96,17 +40,51 @@ def points_gate(
 
     当 POINTS_ENABLED=false（默认）时，装饰器完全透传原函数，零副作用。
     开启后才会执行扣费逻辑：业务异常自动退费，积分不足返回 402。
+
+    Args:
+        scene_key: 消耗场景标识（对应 points_rules.POINTS_SCENES 的 key）
+        per_unit: 固定消耗积分（直接指定，不走规则计算）
+        unit_field: 从 request body 取时长字段名（按时长计费场景）
+        quantity_field: 从 request body 取数量字段名（按次计费场景）
+
+    使用示例::
+
+        @router.post("/ai/voice")
+        @points_gate("ai_voice", unit_field="duration_minutes")
+        async def create_ai_voice(body: VoiceRequest, current_user=Depends(get_current_user), db=Depends(get_db_session)):
+            ...
     """
 
     def decorator(func: Callable) -> Callable:
         is_async = asyncio.iscoroutinefunction(func)
-        return _make_wrapper(func, is_async, scene_key, per_unit, unit_field, quantity_field)
+
+        @functools.wraps(func)
+        async def async_wrapper(*args: Any, **kwargs: Any) -> Any:
+            if not _points_gate_enabled():
+                return await func(*args, **kwargs)
+            return await _execute_with_gate(
+                func, args, kwargs, scene_key, per_unit, unit_field, quantity_field, is_async=True
+            )
+
+        @functools.wraps(func)
+        def sync_wrapper(*args: Any, **kwargs: Any) -> Any:
+            if not _points_gate_enabled():
+                return func(*args, **_filter_kwargs(func, kwargs))
+            return _execute_with_gate(
+                func, args, kwargs, scene_key, per_unit, unit_field, quantity_field, is_async=False
+            )
+
+        if is_async:
+            return async_wrapper
+        return sync_wrapper
 
     return decorator
 
 
+
 def _filter_kwargs(func: Callable, kwargs: dict) -> dict:
     """过滤掉目标函数签名不接受的 kwargs（避免 TypeError）。"""
+    import inspect
     try:
         sig = inspect.signature(func)
         params = sig.parameters
@@ -117,7 +95,6 @@ def _filter_kwargs(func: Callable, kwargs: dict) -> dict:
     except (ValueError, TypeError):
         return kwargs
 
-
 def _extract_kwargs(func: Callable, args: tuple, kwargs: dict) -> dict:
     """将位置参数映射到函数签名中的参数名，便于统一按 kwargs 提取。"""
     sig = inspect.signature(func)
@@ -143,6 +120,7 @@ def _execute_with_gate(
     # 提取 current_user（兼容 authenticated_user 命名）
     current_user = merged.get("current_user") or merged.get("authenticated_user")
     if current_user is None:
+        # 尝试从位置参数中找
         for arg in args:
             if hasattr(arg, "user"):
                 current_user = arg
@@ -195,6 +173,7 @@ def _execute_with_gate(
             member_type=member_type,
         )
 
+    # 零消耗场景（如免费的声音克隆训练）直接放行
     if total_points == 0:
         kwargs["_points_deducted"] = 0
         if is_async: