fix(merchant): 操作人统计时间筛选兼容 USE_TZ=False

MySQL 在关闭 USE_TZ 时不接受 timezone-aware datetime，解析为 naive 再查询。

Co-authored-by: Cursor <cursoragent@cursor.com>

merchant_ops/services/action_stats.py

@@ -15,23 +15,36 @@ from products.models import ShangpinLeixing
 
 
 def _parse_dt(value, end_of_day=False):
+    """解析时间；USE_TZ=False 时必须返回 naive datetime（MySQL）。"""
     if value is None or value == '':
         return None
+    dt = None
     if isinstance(value, datetime):
-        return value
+        dt = value
+    else:
         text = str(value).strip().replace('/', '-')
         for fmt in ('%Y-%m-%d %H:%M:%S', '%Y-%m-%d %H:%M', '%Y-%m-%d'):
             try:
                 dt = datetime.strptime(text, fmt)
                 if fmt == '%Y-%m-%d' and end_of_day:
                     dt = dt.replace(hour=23, minute=59, second=59)
-            if timezone.is_naive(dt):
-                dt = timezone.make_aware(dt, timezone.get_current_timezone())
-            return dt
+                break
             except ValueError:
                 continue
+    if dt is None:
         return None
 
+    from django.conf import settings
+    use_tz = bool(getattr(settings, 'USE_TZ', False))
+
+    if use_tz:
+        if timezone.is_naive(dt):
+            dt = timezone.make_aware(dt, timezone.get_current_timezone())
+    else:
+        if timezone.is_aware(dt):
+            dt = timezone.make_naive(dt, timezone.get_current_timezone())
+    return dt
+
 
 def _money(val):
     if val is None: