feat: 完成前端响应式设计优化，增强移动端体验

- 添加触摸手势支持库 (react-spring + @use-gesture/react)
- 照片模态框增加左右滑动切换功能
- 照片画廊增加下拉刷新功能 (移动端)
- 优化所有按钮符合44px最小触摸目标标准
- 增强移动端导航体验，增加悬停和选中状态
- 创建设备信息检测钩子 (useDeviceInfo)
- 开发优化图片组件，支持懒加载和骨架屏
- 改进移动端手势交互和视觉反馈
- 完善响应式断点系统和触摸设备检测
- 前端构建测试成功，开发服务器正常启动

Task 23 completed: 前端响应式设计优化

frontend/components/photo-gallery.tsx

@@ -5,7 +5,9 @@ import Image from "next/image"
 import { Card } from "@/components/ui/card"
 import { Badge } from "@/components/ui/badge"
 import { Button } from "@/components/ui/button"
-import { Calendar, MapPin, Grid, List, Eye, Heart } from "lucide-react"
+import { Calendar, MapPin, Grid, List, Eye, Heart, RefreshCw } from "lucide-react"
+import { useDrag } from "@use-gesture/react"
+import { useSpring, animated } from "react-spring"
 
 interface Photo {
   id: number
@@ -26,11 +28,12 @@ interface Photo {
 interface PhotoGalleryProps {
   photos: Photo[]
   onPhotoClick: (photo: Photo) => void
+  onRefresh?: () => Promise<void>
 }
 
 type ViewMode = 'grid' | 'masonry' | 'list'
 
-export function PhotoGallery({ photos, onPhotoClick }: PhotoGalleryProps) {
+export function PhotoGallery({ photos, onPhotoClick, onRefresh }: PhotoGalleryProps) {
   const [loadedImages, setLoadedImages] = useState<Set<number>>(new Set())
   const [isHydrated, setIsHydrated] = useState(false)
   const [viewMode, setViewMode] = useState<ViewMode>('grid')
@@ -38,7 +41,57 @@ export function PhotoGallery({ photos, onPhotoClick }: PhotoGalleryProps) {
   const [displayedPhotos, setDisplayedPhotos] = useState<Photo[]>([])
   const [isLoading, setIsLoading] = useState(false)
   const [hasMore, setHasMore] = useState(true)
+  const [isRefreshing, setIsRefreshing] = useState(false)
   const loaderRef = useRef<HTMLDivElement>(null)
+  const galleryRef = useRef<HTMLDivElement>(null)
+
+  // 下拉刷新动画
+  const [{ y }, api] = useSpring(() => ({ y: 0 }))
+
+  // 下拉刷新手势
+  const bindRefresh = useDrag(
+    ({ down, movement: [, my], velocity: [, vy], direction: [, yDir] }) => {
+      // 只在页面顶部且向下拖拽时触发
+      const isAtTop = window.scrollY === 0
+      const isPullingDown = yDir > 0 && my > 0
+      
+      if (!isAtTop || !isPullingDown) return
+
+      const refreshThreshold = 60
+      const shouldRefresh = my > refreshThreshold || vy > 0.3
+
+      if (shouldRefresh && !down && !isRefreshing && onRefresh) {
+        handleRefresh()
+      }
+
+      api.start({
+        y: down ? Math.min(my, 80) : 0,
+        immediate: down,
+        config: { tension: 300, friction: 30 }
+      })
+    },
+    {
+      axis: 'y',
+      bounds: { top: 0 },
+      rubberband: true,
+      filterTaps: true,
+    }
+  )
+
+  const handleRefresh = async () => {
+    if (!onRefresh || isRefreshing) return
+    
+    setIsRefreshing(true)
+    try {
+      await onRefresh()
+      setPage(1)
+      setHasMore(true)
+    } catch (error) {
+      console.error('刷新失败:', error)
+    } finally {
+      setIsRefreshing(false)
+    }
+  }
 
   const photosPerPage = 12
 
@@ -189,7 +242,29 @@ export function PhotoGallery({ photos, onPhotoClick }: PhotoGalleryProps) {
   }
 
   return (
-    <div className="space-y-6">
+    <animated.div 
+      ref={galleryRef}
+      {...bindRefresh()}
+      style={{ transform: y.to(py => `translateY(${py}px)`) }}
+      className="space-y-6 touch-pan-x"
+    >
+      {/* 下拉刷新指示器 */}
+      {onRefresh && (
+        <animated.div
+          style={{
+            opacity: y.to([0, 30, 60], [0, 0.5, 1]),
+            transform: y.to(py => `translateY(${Math.max(0, py - 60)}px)`)
+          }}
+          className="fixed top-16 left-1/2 transform -translate-x-1/2 z-40 bg-white/90 backdrop-blur-sm rounded-full p-3 shadow-lg border md:hidden"
+        >
+          <RefreshCw 
+            className={`h-5 w-5 text-gray-600 ${
+              isRefreshing ? 'animate-spin' : ''
+            }`}
+          />
+        </animated.div>
+      )}
+
       {/* 视图模式切换 */}
       <div className="flex items-center justify-between">
         <div className="flex items-center gap-2">
@@ -197,6 +272,7 @@ export function PhotoGallery({ photos, onPhotoClick }: PhotoGalleryProps) {
             variant={viewMode === 'grid' ? 'default' : 'outline'}
             size="sm"
             onClick={() => setViewMode('grid')}
+            className="min-h-[44px] min-w-[44px] p-2"
           >
             <Grid className="h-4 w-4" />
           </Button>
@@ -204,6 +280,7 @@ export function PhotoGallery({ photos, onPhotoClick }: PhotoGalleryProps) {
             variant={viewMode === 'masonry' ? 'default' : 'outline'}
             size="sm"
             onClick={() => setViewMode('masonry')}
+            className="min-h-[44px] min-w-[44px] p-2"
           >
             <div className="h-4 w-4 flex items-center justify-center">
               <div className="grid grid-cols-2 gap-px">
@@ -218,9 +295,22 @@ export function PhotoGallery({ photos, onPhotoClick }: PhotoGalleryProps) {
             variant={viewMode === 'list' ? 'default' : 'outline'}
             size="sm"
             onClick={() => setViewMode('list')}
+            className="min-h-[44px] min-w-[44px] p-2"
           >
             <List className="h-4 w-4" />
           </Button>
+          {onRefresh && (
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={handleRefresh}
+              disabled={isRefreshing}
+              className="min-h-[44px] px-4 hidden md:flex"
+            >
+              <RefreshCw className={`h-4 w-4 mr-2 ${isRefreshing ? 'animate-spin' : ''}`} />
+              刷新
+            </Button>
+          )}
         </div>
         
         <div className="text-sm text-gray-500">
@@ -259,6 +349,6 @@ export function PhotoGallery({ photos, onPhotoClick }: PhotoGalleryProps) {
           已显示全部 {photos.length} 张照片
         </div>
       )}
-    </div>
+    </animated.div>
   )
 }