fix: 今日订单查询改用 naive 时间（USE_TZ=False）

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

orders/services/today_orders.py

@@ -5,7 +5,6 @@ import logging
 import random
 from datetime import datetime, time, timedelta
 from decimal import Decimal
-from zoneinfo import ZoneInfo
 
 from django.conf import settings
 from django.db.models import Count, Q
@@ -15,17 +14,23 @@ from orders.models import Order, TodayOrderFake, TodayOrderFakeBatchState, Today
 
 logger = logging.getLogger(__name__)
 
-TZ = ZoneInfo('Asia/Shanghai')
-
 # 进行中：已下单/待抢、进行中、指定中
 DOING_STATUSES = {1, 2, 7}
 # 不计入当日有效单：未支付、支付失败、已废弃
 EXCLUDE_STATUSES = {9, 14, 25}
 
 
+def _now_naive():
+    """项目 USE_TZ=False，MySQL 只接受 naive datetime。"""
+    now = timezone.now()
+    if timezone.is_aware(now):
+        return timezone.make_naive(now)
+    return now
+
+
 def _today_range():
-    now = timezone.now().astimezone(TZ)
-    start = datetime.combine(now.date(), time.min, tzinfo=TZ)
+    now = _now_naive()
+    start = datetime.combine(now.date(), time.min)
     end = start + timedelta(days=1)
     return start, end
 
@@ -119,12 +124,15 @@ def _pick_fake_batch(club_id: str, cfg: TodayOrderShowConfig) -> list[TodayOrder
         return []
     batch_n = min(int(cfg.batch_size), len(pool))
     interval = max(10, int(cfg.interval_seconds or 120))
-    now = timezone.now()
+    now = _now_naive()
     state = TodayOrderFakeBatchState.query.filter(club_id=club_id).first()
     need_reshuffle = True
     ids = []
     if state and state.last_shuffle_at and isinstance(state.fake_ids, list):
-        elapsed = (now - state.last_shuffle_at).total_seconds()
+        last = state.last_shuffle_at
+        if timezone.is_aware(last):
+            last = timezone.make_naive(last)
+        elapsed = (now - last).total_seconds()
         if elapsed < interval and state.fake_ids:
             ids = [int(x) for x in state.fake_ids if str(x).isdigit() or isinstance(x, int)]
             need_reshuffle = False