feat: 现代化翻页组件 + 完整项目更新

- 新增 Pagination 通用组件：首页/上一页/页码/下一页/末页导航
- PickModal 和 SwapModal 集成分页功能，每页20项
- 搜索/筛选切换自动回到第1页
- 现代化CSS样式：hover浮起动效、主色高亮、移动端适配
- 新增 dashboard、admin 管理模板
- 菜系(cuisine)模型和迁移
- 构建脚本 build.py 支持 PyInstaller 打包
- 前端资源重新构建

backend/config/settings.py

@@ -10,6 +10,7 @@ For the full list of settings and their values, see
 https://docs.djangoproject.com/en/6.0/ref/settings/
 """
 
+import sys
 from pathlib import Path
 import os
 
@@ -76,54 +77,44 @@ WSGI_APPLICATION = 'config.wsgi.application'
 
 
 # Database
-# https://docs.djangoproject.com/en/6.0/ref/settings/#databases
-
 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': os.environ.get('DJANGO_DB_PATH', str(BASE_DIR / 'db.sqlite3')),
+        'NAME': os.environ.get(
+            'DJANGO_DB_PATH',
+            str(os.path.join(os.path.dirname(sys.executable), 'db.sqlite3') if getattr(sys, 'frozen', False) else BASE_DIR / 'db.sqlite3')
+        ),
     }
 }
 
 
-# Password validation
-# https://docs.djangoproject.com/en/6.0/ref/settings/#auth-password-validators
-
 AUTH_PASSWORD_VALIDATORS = [
-    {
-        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
-    },
-    {
-        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
-    },
-    {
-        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
-    },
-    {
-        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
-    },
+    {'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator'},
+    {'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator'},
+    {'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator'},
+    {'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator'},
 ]
 
 
-# Internationalization
-# https://docs.djangoproject.com/en/6.0/topics/i18n/
-
 LANGUAGE_CODE = 'zh-hans'
-
 TIME_ZONE = 'Asia/Shanghai'
-
 USE_I18N = True
-
 USE_TZ = True
 
 
-# Static files (CSS, JavaScript, Images)
-# https://docs.djangoproject.com/en/6.0/howto/static-files/
-
-STATIC_URL = os.environ.get('DJANGO_STATIC_URL', '/xx/admin/')
+STATIC_URL = os.environ.get('DJANGO_STATIC_URL', '/static/')
 STATIC_ROOT = BASE_DIR / 'staticfiles'
 STATICFILES_DIRS = [BASE_DIR / 'static']
 
+# When frozen by PyInstaller, bundled files live in sys._MEIPASS
+_frozen = getattr(sys, 'frozen', False)
+if _frozen:
+    _bundled = sys._MEIPASS
+    # In frozen mode, static files are at _MEIPASS/backend/static
+    _be_static = os.path.join(_bundled, 'backend', 'static')
+    if os.path.isdir(_be_static) and _be_static not in [os.path.normpath(d) for d in STATICFILES_DIRS]:
+        STATICFILES_DIRS.append(_be_static)
+
 CORS_ALLOWED_ORIGINS = [
     'http://localhost:5173',
     'http://127.0.0.1:5173',
@@ -149,8 +140,8 @@ JAZZMIN_SETTINGS = {
     'site_title': '学校订餐菜单管理系统',
     'site_header': '学校订餐菜单生成器',
     'site_brand': '订餐菜单管理',
+    'site_icon': 'frontend/icon_512.png',
     'welcome_sign': '欢迎使用学校订餐菜单管理系统',
-    'copyright': '上海外国语大学附属宝山双语学校',
     'search_model': ['meals.Dish', 'auth.User'],
     'show_sidebar': True,
     'navigation_expanded': True,
@@ -169,7 +160,6 @@ JAZZMIN_SETTINGS = {
     'custom_css': None,
     'custom_js': None,
     'theme': 'flatly',
-    'dark_mode_theme': 'darkly',
     'header_classes': 'bg-primary',
     'order_with_respect_to': ['meals', 'auth'],
 }
@@ -195,6 +185,10 @@ JAZZMIN_UI_TWEAKS = {
     'sidebar_nav_legacy_style': False,
     'sidebar_nav_flat_style': False,
     'theme': 'flatly',
-    'dark_mode_theme': 'darkly',
     'button_classes': {'primary': 'btn-outline-primary', 'secondary': 'btn-outline-secondary', 'info': 'btn-outline-info', 'warning': 'btn-outline-warning', 'danger': 'btn-outline-danger', 'success': 'btn-outline-success'},
 }
+
+
+LOGIN_REDIRECT_URL = '/admin/'
+LOGOUT_REDIRECT_URL = '/admin/login/'
+