昨天的记录改为，昨天更新的时间

core/views.py

@@ -95,7 +95,9 @@ def add_reading(request):
     if request.method == 'POST':
         form = ReadingRecordForm(request.POST, request.FILES)
         if form.is_valid():
-            form.save()
+            reading = form.save(commit=False)
+            reading.date = timezone.now().date() - timedelta(days=1)
+            reading.save()
             logger.info(f"添加阅读记录: {form.cleaned_data['title']}")
             return redirect('yesterday_records')
     else:
@@ -138,7 +140,9 @@ def add_insight(request):
     if request.method == 'POST':
         form = InsightRecordForm(request.POST, request.FILES)
         if form.is_valid():
-            form.save()
+            insight = form.save(commit=False)
+            insight.date = timezone.now().date() - timedelta(days=1)
+            insight.save()
             logger.info("添加感悟记录")
             return redirect('yesterday_records')
     else: