feat: 移除轮播图管理，系列活动改卡片布局，课程描述限10行，首页配置优化

backend/competition/admin.py

@@ -2,28 +2,20 @@ from django.contrib import admin
 from django.utils.html import format_html
 from unfold.admin import ModelAdmin
 from unfold.decorators import display
-from .models import Competition, CompetitionEnrollment, ScoreDimension, Project, ProjectFile, Score, Comment, HomePageConfig, CarouselItem
-
-
-class CarouselItemInline(admin.TabularInline):
-    model = CarouselItem
-    extra = 1
-    tab = True
-    fields = ('carousel_type', 'image', 'image_url', 'title', 'subtitle', 'status', 'status_color', 'date', 'location', 'order', 'is_active')
-    autocomplete_fields = []
+from .models import Competition, CompetitionEnrollment, ScoreDimension, Project, ProjectFile, Score, Comment, HomePageConfig
 
 
 @admin.register(HomePageConfig)
 class HomePageConfigAdmin(ModelAdmin):
-    list_display = ['id', 'main_title', 'carousel1_title', 'carousel2_title', 'organizer', 'undertaker', 'is_active']
-    list_editable = ['main_title', 'carousel1_title', 'carousel2_title', 'organizer', 'undertaker', 'is_active']
+    list_display = ['id', 'main_title', 'organizer', 'undertaker', 'is_active']
+    list_editable = ['main_title', 'organizer', 'undertaker', 'is_active']
     fieldsets = (
-        ('首页Banner', {
+        ('封面图', {
             'fields': ('banner_image', 'banner_image_url'),
-            'description': '首页顶部Banner图片，可以上传本地图片或填写URL'
+            'description': '首页标题下方的封面图，可上传本地图片或填写URL'
         }),
         ('标题设置', {
-            'fields': ('main_title', 'carousel1_title', 'carousel2_title')
+            'fields': ('main_title',)
         }),
         ('主办单位', {
             'fields': ('organizer', 'undertaker')
@@ -34,37 +26,6 @@ class HomePageConfigAdmin(ModelAdmin):
     )
 
 
-@admin.register(CarouselItem)
-class CarouselItemAdmin(ModelAdmin):
-    list_display = ['title', 'carousel_type', 'status', 'location', 'order', 'is_active', 'created_at']
-    list_filter = ['carousel_type', 'status', 'is_active']
-    search_fields = ['title', 'subtitle', 'location']
-    readonly_fields = ['image_preview']
-    fieldsets = (
-        ('轮播图类型', {
-            'fields': ('carousel_type',)
-        }),
-        ('图片设置', {
-            'fields': ('image', 'image_preview', 'image_url'),
-            'description': '优先使用本地上传的图片，上传后可预览'
-        }),
-        ('内容设置', {
-            'fields': ('title', 'subtitle', 'status', 'status_color', 'date', 'location')
-        }),
-        ('显示设置', {
-            'fields': ('order', 'is_active')
-        }),
-    )
-
-    @display(description='图片预览')
-    def image_preview(self, obj):
-        if obj.image:
-            return format_html('<img src="{}" style="max-width: 400px; max-height: 200px; border-radius: 8px;" />', obj.image.url)
-        elif obj.image_url:
-            return format_html('<img src="{}" style="max-width: 400px; max-height: 200px; border-radius: 8px;" />', obj.image_url)
-        return "暂无图片"
-
-
 class ScoreDimensionInline(admin.TabularInline):
     model = ScoreDimension
     extra = 1