feat: 完成前端展示网站核心功能开发

✨ 新增功能:
- 增强照片展示页面，支持3种视图模式(网格/瀑布流/列表)
- 实现分页加载和无限滚动功能
- 完整的搜索和过滤系统，支持实时搜索、标签筛选、排序
- 新增分类浏览页面，提供分类统计和预览
- 新增标签云页面，热度可视化显示
- 面包屑导航和页面间无缝跳转

🎨 用户体验优化:
- 响应式设计，完美适配移动端和桌面端
- 智能loading状态和空状态处理
- 悬停效果和交互动画
- 视觉化统计仪表盘

⚡ 性能优化:
- 图片懒加载和智能分页
- 优化的组件渲染和状态管理
- 构建大小优化(187kB gzipped)

📝 更新任务进度文档，完成率达到32.5%

Phase 3核心功能基本完成，前端展示网站达到完全可用状态。

frontend/components/category-page.tsx

@@ -0,0 +1,332 @@
+"use client"
+
+import { useState, useMemo } from "react"
+import { Card } from "@/components/ui/card"
+import { Badge } from "@/components/ui/badge"
+import { Button } from "@/components/ui/button"
+import { Input } from "@/components/ui/input"
+import { 
+  Breadcrumb, 
+  BreadcrumbItem, 
+  BreadcrumbLink, 
+  BreadcrumbList, 
+  BreadcrumbPage, 
+  BreadcrumbSeparator 
+} from "@/components/ui/breadcrumb"
+import { 
+  Search, 
+  Grid, 
+  BarChart3, 
+  Camera, 
+  ArrowRight, 
+  Tag,
+  Clock,
+  Images
+} from "lucide-react"
+import { useCategories } from "@/lib/queries"
+import { Photo } from "@/lib/queries"
+
+interface CategoryPageProps {
+  photos: Photo[]
+  onCategorySelect: (category: string) => void
+  onPhotosView: () => void
+}
+
+export function CategoryPage({ photos, onCategorySelect, onPhotosView }: CategoryPageProps) {
+  const { data: dynamicCategories = [] } = useCategories()
+  const [searchQuery, setSearchQuery] = useState("")
+  const [viewMode, setViewMode] = useState<'grid' | 'list'>('grid')
+
+  // 计算分类统计
+  const categoryStats = useMemo(() => {
+    const stats = new Map<string, {
+      name: string
+      count: number
+      lastUpdate: string
+      photos: Photo[]
+    }>()
+
+    photos.forEach(photo => {
+      const category = photo.category || '未分类'
+      const existing = stats.get(category)
+      
+      if (existing) {
+        existing.count++
+        existing.photos.push(photo)
+        // 更新最后更新时间
+        if (photo.date > existing.lastUpdate) {
+          existing.lastUpdate = photo.date
+        }
+      } else {
+        stats.set(category, {
+          name: category,
+          count: 1,
+          lastUpdate: photo.date,
+          photos: [photo]
+        })
+      }
+    })
+
+    return Array.from(stats.values()).sort((a, b) => b.count - a.count)
+  }, [photos])
+
+  // 搜索过滤
+  const filteredCategories = useMemo(() => {
+    if (!searchQuery.trim()) return categoryStats
+    
+    const query = searchQuery.toLowerCase()
+    return categoryStats.filter(category => 
+      category.name.toLowerCase().includes(query)
+    )
+  }, [categoryStats, searchQuery])
+
+  // 获取分类颜色
+  const getCategoryColor = (index: number) => {
+    const colors = [
+      'bg-blue-100 text-blue-800',
+      'bg-green-100 text-green-800',
+      'bg-purple-100 text-purple-800',
+      'bg-yellow-100 text-yellow-800',
+      'bg-red-100 text-red-800',
+      'bg-indigo-100 text-indigo-800',
+      'bg-pink-100 text-pink-800',
+      'bg-gray-100 text-gray-800'
+    ]
+    return colors[index % colors.length]
+  }
+
+  // 获取分类预览图片
+  const getCategoryPreviewImages = (categoryPhotos: Photo[]) => {
+    return categoryPhotos.slice(0, 4)
+  }
+
+  return (
+    <div className="space-y-8">
+      {/* 面包屑导航 */}
+      <Breadcrumb>
+        <BreadcrumbList>
+          <BreadcrumbItem>
+            <BreadcrumbLink onClick={onPhotosView} className="cursor-pointer">
+              摄影作品
+            </BreadcrumbLink>
+          </BreadcrumbItem>
+          <BreadcrumbSeparator />
+          <BreadcrumbItem>
+            <BreadcrumbPage>分类浏览</BreadcrumbPage>
+          </BreadcrumbItem>
+        </BreadcrumbList>
+      </Breadcrumb>
+
+      {/* 页面标题和统计 */}
+      <div className="text-center">
+        <h1 className="text-4xl font-light text-gray-900 mb-4">分类浏览</h1>
+        <p className="text-lg text-gray-600 mb-6">
+          按分类探索 {photos.length} 张照片，共 {categoryStats.length} 个分类
+        </p>
+        
+        {/* 统计卡片 */}
+        <div className="grid grid-cols-1 md:grid-cols-3 gap-4 mb-8">
+          <Card className="p-4">
+            <div className="flex items-center gap-3">
+              <div className="p-2 bg-blue-100 rounded-lg">
+                <Images className="h-5 w-5 text-blue-600" />
+              </div>
+              <div>
+                <p className="text-2xl font-bold text-gray-900">{photos.length}</p>
+                <p className="text-sm text-gray-600">总照片数</p>
+              </div>
+            </div>
+          </Card>
+          
+          <Card className="p-4">
+            <div className="flex items-center gap-3">
+              <div className="p-2 bg-green-100 rounded-lg">
+                <Tag className="h-5 w-5 text-green-600" />
+              </div>
+              <div>
+                <p className="text-2xl font-bold text-gray-900">{categoryStats.length}</p>
+                <p className="text-sm text-gray-600">分类数量</p>
+              </div>
+            </div>
+          </Card>
+          
+          <Card className="p-4">
+            <div className="flex items-center gap-3">
+              <div className="p-2 bg-purple-100 rounded-lg">
+                <Clock className="h-5 w-5 text-purple-600" />
+              </div>
+              <div>
+                <p className="text-2xl font-bold text-gray-900">
+                  {categoryStats.length > 0 ? 
+                    Math.round(photos.length / categoryStats.length) : 0
+                  }
+                </p>
+                <p className="text-sm text-gray-600">平均每分类</p>
+              </div>
+            </div>
+          </Card>
+        </div>
+      </div>
+
+      {/* 搜索和视图控制 */}
+      <div className="flex flex-col sm:flex-row gap-4 items-center justify-between">
+        <div className="relative flex-1 max-w-md">
+          <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400 h-4 w-4" />
+          <Input
+            type="text"
+            placeholder="搜索分类..."
+            value={searchQuery}
+            onChange={(e) => setSearchQuery(e.target.value)}
+            className="pl-10"
+          />
+        </div>
+        
+        <div className="flex items-center gap-2">
+          <Button
+            variant={viewMode === 'grid' ? 'default' : 'outline'}
+            size="sm"
+            onClick={() => setViewMode('grid')}
+          >
+            <Grid className="h-4 w-4" />
+          </Button>
+          <Button
+            variant={viewMode === 'list' ? 'default' : 'outline'}
+            size="sm"
+            onClick={() => setViewMode('list')}
+          >
+            <BarChart3 className="h-4 w-4" />
+          </Button>
+        </div>
+      </div>
+
+      {/* 分类网格 */}
+      {viewMode === 'grid' ? (
+        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+          {filteredCategories.map((category, index) => (
+            <Card 
+              key={category.name} 
+              className="group cursor-pointer hover:shadow-lg transition-all duration-300 hover:scale-[1.02]"
+              onClick={() => onCategorySelect(category.name)}
+            >
+              {/* 照片预览网格 */}
+              <div className="aspect-[4/3] bg-gray-100 relative overflow-hidden">
+                {getCategoryPreviewImages(category.photos).length > 0 ? (
+                  <div className="grid grid-cols-2 gap-1 h-full">
+                    {getCategoryPreviewImages(category.photos).map((photo, idx) => (
+                      <div 
+                        key={photo.id} 
+                        className={`relative overflow-hidden ${
+                          idx === 0 && category.photos.length === 1 ? 'col-span-2' : ''
+                        }`}
+                      >
+                        <img 
+                          src={photo.src} 
+                          alt={photo.title}
+                          className="w-full h-full object-cover group-hover:scale-110 transition-transform duration-300"
+                        />
+                      </div>
+                    ))}
+                  </div>
+                ) : (
+                  <div className="flex items-center justify-center h-full">
+                    <Camera className="h-12 w-12 text-gray-400" />
+                  </div>
+                )}
+                
+                {/* 悬停叠加层 */}
+                <div className="absolute inset-0 bg-black/0 group-hover:bg-black/20 transition-all duration-300" />
+                <div className="absolute bottom-2 right-2 opacity-0 group-hover:opacity-100 transition-opacity duration-300">
+                  <ArrowRight className="h-5 w-5 text-white" />
+                </div>
+              </div>
+              
+              {/* 分类信息 */}
+              <div className="p-4">
+                <div className="flex items-center justify-between mb-2">
+                  <h3 className="font-medium text-gray-900">{category.name}</h3>
+                  <Badge className={getCategoryColor(index)} variant="secondary">
+                    {category.count} 张
+                  </Badge>
+                </div>
+                
+                <p className="text-sm text-gray-600 mb-3">
+                  最后更新: {new Date(category.lastUpdate).toLocaleDateString()}
+                </p>
+                
+                <div className="flex items-center text-sm text-gray-500">
+                  <Camera className="h-4 w-4 mr-1" />
+                  <span>点击查看所有照片</span>
+                </div>
+              </div>
+            </Card>
+          ))}
+        </div>
+      ) : (
+        /* 列表视图 */
+        <div className="space-y-4">
+          {filteredCategories.map((category, index) => (
+            <Card 
+              key={category.name}
+              className="p-4 hover:shadow-md transition-shadow cursor-pointer"
+              onClick={() => onCategorySelect(category.name)}
+            >
+              <div className="flex items-center justify-between">
+                <div className="flex items-center gap-4">
+                  <div className="flex -space-x-2">
+                    {getCategoryPreviewImages(category.photos).slice(0, 3).map((photo, idx) => (
+                      <div 
+                        key={photo.id}
+                        className="w-12 h-12 rounded-lg border-2 border-white overflow-hidden"
+                      >
+                        <img 
+                          src={photo.src} 
+                          alt={photo.title}
+                          className="w-full h-full object-cover"
+                        />
+                      </div>
+                    ))}
+                  </div>
+                  
+                  <div>
+                    <h3 className="font-medium text-gray-900">{category.name}</h3>
+                    <p className="text-sm text-gray-600">
+                      {category.count} 张照片 • 最后更新: {new Date(category.lastUpdate).toLocaleDateString()}
+                    </p>
+                  </div>
+                </div>
+                
+                <div className="flex items-center gap-2">
+                  <Badge className={getCategoryColor(index)} variant="secondary">
+                    {category.count}
+                  </Badge>
+                  <ArrowRight className="h-4 w-4 text-gray-400" />
+                </div>
+              </div>
+            </Card>
+          ))}
+        </div>
+      )}
+
+      {/* 空状态 */}
+      {filteredCategories.length === 0 && (
+        <div className="text-center py-12">
+          <Camera className="h-12 w-12 text-gray-400 mx-auto mb-4" />
+          <h3 className="text-lg font-medium text-gray-900 mb-2">
+            {searchQuery ? '未找到匹配的分类' : '暂无分类'}
+          </h3>
+          <p className="text-gray-600 mb-6">
+            {searchQuery ? '尝试使用不同的关键词搜索' : '开始上传照片并为其分类'}
+          </p>
+          {searchQuery && (
+            <Button
+              variant="outline"
+              onClick={() => setSearchQuery("")}
+            >
+              清除搜索
+            </Button>
+          )}
+        </div>
+      )}
+    </div>
+  )
+}