营养校准、后台美化、静态走对象存储 CDN、标题可编辑、admin 拼音搜索

- 菜品营养按食物成分表+烹饪方式校准（calibrate_nutrition 命令）
- 后台接入 jazzmin 主题美化，移除 Google Fonts（模板覆盖）
- 前端/后台静态资源指向 qnycdn 对象存储 CDN（vite base + DJANGO_STATIC_URL）
- 菜单标题学校名称/周数可编辑，日期随周数计算
- admin 搜索支持拼音首字母/全拼（Dish.pinyin 索引，pypinyin）
- Dockerfile 使用清华 pip 镜像源

backend/meals/views.py

@@ -223,23 +223,35 @@ def generate_week_menu(payload, menu_key='a'):
     return week
 
 
-def build_menu_title(label):
-    today = date.today()
-    week_no = today.isocalendar().week
-    monday = today - timedelta(days=today.weekday())
+def build_menu_title(label, school_name=None, week_no=None):
+    school_name = school_name or SCHOOL_NAME
+    iso = date.today().isocalendar()
+    try:
+        week_no = int(week_no) if week_no is not None else iso.week
+    except (TypeError, ValueError):
+        week_no = iso.week
+    if not 1 <= week_no <= 53:
+        week_no = iso.week
+    try:
+        monday = date.fromisocalendar(iso.year, week_no, 1)
+    except ValueError:
+        monday = date.today() - timedelta(days=date.today().weekday())
     friday = monday + timedelta(days=4)
     date_range = f'{monday.month}.{monday.day}--{friday.month}.{friday.day}'
-    return f'{SCHOOL_NAME}[第{week_no}周]{date_range}营养{label}菜单'
+    return f'{school_name}[第{week_no}周]{date_range}营养{label}菜单'
 
 
 @api_view(['POST'])
 def generate_menu(request):
+    data = request.data
+    school = data.get('school_name') or SCHOOL_NAME
+    week_no = data.get('week_no')
     menus = {}
     for label in ('A', 'B'):
         key = label.lower()
         menus[key] = {
-            'title': build_menu_title(label),
-            'week': generate_week_menu(request.data, menu_key=key),
+            'title': build_menu_title(label, school, week_no),
+            'week': generate_week_menu(data, menu_key=key),
         }
     return Response(menus)