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/meals/admin.py

@@ -1,7 +1,32 @@
 from django.contrib import admin
 from django.utils.html import format_html, mark_safe
 
-from .models import Dish
+from .models import Cuisine, Dish
+
+
+@admin.action(description='启用所选菜系')
+def activate_cuisines(modeladmin, request, queryset):
+    queryset.update(is_active=True)
+
+
+@admin.action(description='停用所选菜系')
+def deactivate_cuisines(modeladmin, request, queryset):
+    queryset.update(is_active=False)
+
+
+@admin.register(Cuisine)
+class CuisineAdmin(admin.ModelAdmin):
+    list_display = ('name', 'description', 'sort_order', 'is_active', 'dish_count_display', 'created_at')
+    list_editable = ('sort_order', 'is_active')
+    list_filter = ('is_active',)
+    search_fields = ('name',)
+    list_per_page = 50
+    actions = [activate_cuisines, deactivate_cuisines]
+
+    @admin.display(description='菜品数')
+    def dish_count_display(self, obj):
+        count = obj.dishes.count()
+        return format_html('<span style="font-weight:600">{}</span>', count)
 
 
 @admin.action(description='启用所选菜品（参与自动生成）')
@@ -16,10 +41,10 @@ def deactivate_dishes(modeladmin, request, queryset):
 
 @admin.register(Dish)
 class DishAdmin(admin.ModelAdmin):
-    list_display = ('name', 'cuisine', 'dish_type_display', 'ingredient_detail', 'protein', 'fat', 'calorie', 'nutri_badge', 'is_active', 'created_at')
+    list_display = ('name', 'cuisine_display', 'dish_type_display', 'ingredient_detail', 'protein', 'fat', 'calorie', 'nutri_badge', 'is_active', 'created_at')
     list_filter = ('dish_type', 'cuisine', 'is_active')
-    search_fields = ('name', 'ingredient_detail', 'cuisine', 'pinyin')
-    list_editable = ('cuisine', 'ingredient_detail', 'protein', 'fat', 'calorie', 'is_active')
+    search_fields = ('name', 'ingredient_detail', 'cuisine__name', 'pinyin')
+    list_editable = ('ingredient_detail', 'protein', 'fat', 'calorie', 'is_active')
     list_per_page = 50
     actions = [activate_dishes, deactivate_dishes]
     fieldsets = (
@@ -28,6 +53,12 @@ class DishAdmin(admin.ModelAdmin):
         ('其他', {'fields': ('description',), 'classes': ('collapse',)}),
     )
 
+    @admin.display(description='菜系', ordering='cuisine')
+    def cuisine_display(self, obj):
+        if obj.cuisine:
+            return obj.cuisine.name
+        return '—'
+
     @admin.display(description='营养提示', ordering='calorie')
     def nutri_badge(self, obj):
         badges = []