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/photo-gallery.tsx

@@ -1,10 +1,11 @@
 "use client"
 
-import { useState, useEffect } from "react"
+import { useState, useEffect, useCallback, useRef } from "react"
 import Image from "next/image"
 import { Card } from "@/components/ui/card"
 import { Badge } from "@/components/ui/badge"
-import { Calendar, MapPin } from "lucide-react"
+import { Button } from "@/components/ui/button"
+import { Calendar, MapPin, Grid, List, Eye, Heart } from "lucide-react"
 
 interface Photo {
   id: number
@@ -27,70 +28,237 @@ interface PhotoGalleryProps {
   onPhotoClick: (photo: Photo) => void
 }
 
+type ViewMode = 'grid' | 'masonry' | 'list'
+
 export function PhotoGallery({ photos, onPhotoClick }: PhotoGalleryProps) {
   const [loadedImages, setLoadedImages] = useState<Set<number>>(new Set())
   const [isHydrated, setIsHydrated] = useState(false)
+  const [viewMode, setViewMode] = useState<ViewMode>('grid')
+  const [page, setPage] = useState(1)
+  const [displayedPhotos, setDisplayedPhotos] = useState<Photo[]>([])
+  const [isLoading, setIsLoading] = useState(false)
+  const [hasMore, setHasMore] = useState(true)
+  const loaderRef = useRef<HTMLDivElement>(null)
+
+  const photosPerPage = 12
 
   useEffect(() => {
     setIsHydrated(true)
   }, [])
 
+  // 初始化显示的照片
+  useEffect(() => {
+    if (photos.length > 0) {
+      setDisplayedPhotos(photos.slice(0, photosPerPage))
+      setHasMore(photos.length > photosPerPage)
+      setPage(1)
+    }
+  }, [photos])
+
+  // 加载更多照片
+  const loadMorePhotos = useCallback(() => {
+    if (isLoading || !hasMore) return
+    
+    setIsLoading(true)
+    
+    // 模拟API加载延迟
+    setTimeout(() => {
+      const nextPage = page + 1
+      const startIndex = (nextPage - 1) * photosPerPage
+      const endIndex = startIndex + photosPerPage
+      const newPhotos = photos.slice(startIndex, endIndex)
+      
+      if (newPhotos.length > 0) {
+        setDisplayedPhotos(prev => [...prev, ...newPhotos])
+        setPage(nextPage)
+        setHasMore(endIndex < photos.length)
+      } else {
+        setHasMore(false)
+      }
+      
+      setIsLoading(false)
+    }, 500)
+  }, [page, photos, isLoading, hasMore, photosPerPage])
+
+  // 滚动检测
+  useEffect(() => {
+    const observer = new IntersectionObserver(
+      ([entry]) => {
+        if (entry.isIntersecting && hasMore && !isLoading) {
+          loadMorePhotos()
+        }
+      },
+      { threshold: 0.1 }
+    )
+
+    if (loaderRef.current) {
+      observer.observe(loaderRef.current)
+    }
+
+    return () => observer.disconnect()
+  }, [hasMore, isLoading, loadMorePhotos])
+
   const handleImageLoad = (photoId: number) => {
     setLoadedImages((prev) => new Set(prev).add(photoId))
   }
 
-  return (
-    <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
-      {photos.map((photo) => (
-        <Card
-          key={photo.id}
-          className="group cursor-pointer overflow-hidden border-0 shadow-sm hover:shadow-xl transition-all duration-300 hover:scale-[1.02]"
-          onClick={() => onPhotoClick(photo)}
-        >
-          <div className="relative aspect-[4/3] overflow-hidden">
-            {isHydrated && !loadedImages.has(photo.id) && <div className="absolute inset-0 bg-gray-100 animate-pulse" />}
-            <Image
-              src={photo.src || "/placeholder.svg"}
-              alt={photo.title}
-              fill
-              className={`object-cover transition-all duration-500 group-hover:scale-110 ${
-                isHydrated && loadedImages.has(photo.id) ? "opacity-100" : !isHydrated ? "opacity-100" : "opacity-0"
-              }`}
-              onLoad={() => handleImageLoad(photo.id)}
-            />
-            <div className="absolute inset-0 bg-black/0 group-hover:bg-black/20 transition-all duration-300" />
+  const getGridClasses = () => {
+    switch (viewMode) {
+      case 'grid':
+        return 'grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6'
+      case 'masonry':
+        return 'columns-1 md:columns-2 lg:columns-3 xl:columns-4 gap-6 space-y-6'
+      case 'list':
+        return 'space-y-6'
+      default:
+        return 'grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6'
+    }
+  }
 
-            {/* Hover overlay */}
-            <div className="absolute inset-0 p-4 flex flex-col justify-end opacity-0 group-hover:opacity-100 transition-all duration-300">
-              <div className="text-white">
-                <h3 className="font-medium text-lg mb-1">{photo.title}</h3>
-                <p className="text-sm text-white/80 mb-2">{photo.description}</p>
-                <div className="flex items-center gap-2 text-xs text-white/70">
-                  <Calendar className="h-3 w-3" />
-                  <span>{photo.date}</span>
-                  <MapPin className="h-3 w-3 ml-2" />
-                  <span>{photo.exif.location}</span>
-                </div>
+  const renderPhotoCard = (photo: Photo) => {
+    const isListView = viewMode === 'list'
+    
+    return (
+      <Card
+        key={photo.id}
+        className={`group cursor-pointer overflow-hidden border-0 shadow-sm hover:shadow-xl transition-all duration-300 hover:scale-[1.02] ${
+          viewMode === 'masonry' ? 'break-inside-avoid mb-6' : ''
+        } ${isListView ? 'flex flex-row' : ''}`}
+        onClick={() => onPhotoClick(photo)}
+      >
+        <div className={`relative overflow-hidden ${
+          isListView ? 'w-48 h-32 flex-shrink-0' : 'aspect-[4/3]'
+        }`}>
+          {isHydrated && !loadedImages.has(photo.id) && (
+            <div className="absolute inset-0 bg-gray-100 animate-pulse" />
+          )}
+          <Image
+            src={photo.src || "/placeholder.svg"}
+            alt={photo.title}
+            fill
+            className={`object-cover transition-all duration-500 group-hover:scale-110 ${
+              isHydrated && loadedImages.has(photo.id) ? "opacity-100" : !isHydrated ? "opacity-100" : "opacity-0"
+            }`}
+            onLoad={() => handleImageLoad(photo.id)}
+          />
+          <div className="absolute inset-0 bg-black/0 group-hover:bg-black/20 transition-all duration-300" />
+
+          {/* Hover overlay */}
+          <div className="absolute inset-0 p-4 flex flex-col justify-end opacity-0 group-hover:opacity-100 transition-all duration-300">
+            <div className="text-white">
+              <div className="flex items-center gap-2 text-xs text-white/70">
+                <Eye className="h-3 w-3" />
+                <span>点击查看</span>
+                <Heart className="h-3 w-3 ml-2" />
               </div>
             </div>
           </div>
+        </div>
 
-          {/* Card content */}
-          <div className="p-4">
-            <h3 className="font-medium text-gray-900 mb-2">{photo.title}</h3>
-            <div className="flex flex-wrap gap-1 mb-3">
-              {photo.tags.slice(0, 2).map((tag) => (
-                <Badge key={tag} variant="secondary" className="text-xs">
-                  {tag}
-                </Badge>
-              ))}
+        {/* Card content */}
+        <div className={`p-4 ${isListView ? 'flex-1' : ''}`}>
+          <h3 className="font-medium text-gray-900 mb-2">{photo.title}</h3>
+          {isListView && (
+            <p className="text-sm text-gray-600 mb-3 line-clamp-2">
+              {photo.description}
+            </p>
+          )}
+          <div className="flex flex-wrap gap-1 mb-3">
+            {photo.tags.slice(0, isListView ? 4 : 2).map((tag) => (
+              <Badge key={tag} variant="secondary" className="text-xs">
+                {tag}
+              </Badge>
+            ))}
+          </div>
+          <div className="text-xs text-gray-500">
+            <div className="flex items-center gap-2 mb-1">
+              <Calendar className="h-3 w-3" />
+              <span>{photo.date}</span>
             </div>
-            <div className="text-xs text-gray-500">
+            <div className="flex items-center gap-2 mb-1">
+              <MapPin className="h-3 w-3" />
+              <span>{photo.exif.location}</span>
+            </div>
+            <div>
               {photo.exif.camera} • {photo.exif.settings}
             </div>
           </div>
-        </Card>
-      ))}
+        </div>
+      </Card>
+    )
+  }
+
+  return (
+    <div className="space-y-6">
+      {/* 视图模式切换 */}
+      <div className="flex items-center justify-between">
+        <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 === 'masonry' ? 'default' : 'outline'}
+            size="sm"
+            onClick={() => setViewMode('masonry')}
+          >
+            <div className="h-4 w-4 flex items-center justify-center">
+              <div className="grid grid-cols-2 gap-px">
+                <div className="w-1 h-1 bg-current"></div>
+                <div className="w-1 h-2 bg-current"></div>
+                <div className="w-1 h-2 bg-current"></div>
+                <div className="w-1 h-1 bg-current"></div>
+              </div>
+            </div>
+          </Button>
+          <Button
+            variant={viewMode === 'list' ? 'default' : 'outline'}
+            size="sm"
+            onClick={() => setViewMode('list')}
+          >
+            <List className="h-4 w-4" />
+          </Button>
+        </div>
+        
+        <div className="text-sm text-gray-500">
+          显示 {displayedPhotos.length} / {photos.length} 张照片
+        </div>
+      </div>
+
+      {/* 照片网格 */}
+      <div className={getGridClasses()}>
+        {displayedPhotos.map(renderPhotoCard)}
+      </div>
+
+      {/* 加载更多 */}
+      {hasMore && (
+        <div ref={loaderRef} className="py-8 text-center">
+          {isLoading ? (
+            <div className="flex items-center justify-center gap-2">
+              <div className="animate-spin rounded-full h-5 w-5 border-2 border-gray-300 border-t-gray-600"></div>
+              <span className="text-gray-600">正在加载更多...</span>
+            </div>
+          ) : (
+            <Button
+              variant="outline"
+              onClick={loadMorePhotos}
+              className="px-8"
+            >
+              加载更多照片
+            </Button>
+          )}
+        </div>
+      )}
+
+      {/* 无更多照片 */}
+      {!hasMore && displayedPhotos.length > photosPerPage && (
+        <div className="py-8 text-center text-gray-500">
+          已显示全部 {photos.length} 张照片
+        </div>
+      )}
     </div>
   )
 }