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/filter-bar.tsx

@@ -1,11 +1,11 @@
 "use client"
 
-import { useState, useEffect } from "react"
+import { useState } from "react"
 import { Button } from "@/components/ui/button"
 import { Input } from "@/components/ui/input"
 import { Badge } from "@/components/ui/badge"
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
-import { Search, X, Calendar, Tag, SlidersHorizontal } from "lucide-react"
+import { Search, X, Tag, SlidersHorizontal } from "lucide-react"
 import { useCategories } from "@/lib/queries"
 
 interface FilterBarProps {

frontend/components/navigation.tsx

@@ -43,7 +43,7 @@ export function Navigation({ activeTab, onTabChange }: NavigationProps) {
               <button
                 key={item.name}
                 onClick={() => handleTabClick(item)}
-                className={`text-gray-700 hover:text-gray-900 transition-colors duration-200 font-light relative pb-1 ${
+                className={`text-gray-700 hover:text-gray-900 transition-colors duration-200 font-light relative pb-1 min-h-[44px] px-2 ${
                   activeTab === item.id ? "text-gray-900" : ""
                 }`}
               >
@@ -56,7 +56,12 @@ export function Navigation({ activeTab, onTabChange }: NavigationProps) {
           </div>
 
           {/* Mobile Menu Button */}
-          <Button variant="ghost" size="sm" className="md:hidden" onClick={() => setIsMenuOpen(!isMenuOpen)}>
+          <Button 
+            variant="ghost" 
+            size="sm" 
+            className="md:hidden min-h-[44px] min-w-[44px] p-2" 
+            onClick={() => setIsMenuOpen(!isMenuOpen)}
+          >
             {isMenuOpen ? <X className="h-6 w-6" /> : <Menu className="h-6 w-6" />}
           </Button>
         </div>
@@ -64,13 +69,13 @@ export function Navigation({ activeTab, onTabChange }: NavigationProps) {
         {/* Mobile Navigation */}
         {isMenuOpen && (
           <div className="md:hidden py-4 border-t border-gray-100">
-            <div className="flex flex-col space-y-4">
+            <div className="flex flex-col space-y-2">
               {navItems.map((item) => (
                 <button
                   key={item.name}
                   onClick={() => handleTabClick(item)}
-                  className={`text-left text-gray-700 hover:text-gray-900 transition-colors duration-200 font-light ${
-                    activeTab === item.id ? "text-gray-900 font-medium" : ""
+                  className={`text-left text-gray-700 hover:text-gray-900 transition-colors duration-200 font-light min-h-[44px] px-4 py-2 rounded-md hover:bg-gray-50 ${
+                    activeTab === item.id ? "text-gray-900 font-medium bg-gray-50" : ""
                   }`}
                 >
                   {item.name}

frontend/components/optimized-image.tsx

@@ -0,0 +1,140 @@
+"use client"
+
+import { useState, useRef, useEffect } from "react"
+import Image from "next/image"
+import { useDeviceInfo } from "@/hooks/use-mobile"
+
+interface OptimizedImageProps {
+  src: string
+  alt: string
+  width?: number
+  height?: number
+  className?: string
+  priority?: boolean
+  onClick?: () => void
+  onLoad?: () => void
+}
+
+export function OptimizedImage({
+  src,
+  alt,
+  width,
+  height,
+  className = "",
+  priority = false,
+  onClick,
+  onLoad
+}: OptimizedImageProps) {
+  const [isLoaded, setIsLoaded] = useState(false)
+  const [isInView, setIsInView] = useState(false)
+  const [hasError, setHasError] = useState(false)
+  const imgRef = useRef<HTMLDivElement>(null)
+  const { isMobile, viewport } = useDeviceInfo()
+
+  // 交叉观察器用于懒加载
+  useEffect(() => {
+    if (priority) {
+      setIsInView(true)
+      return
+    }
+
+    const observer = new IntersectionObserver(
+      ([entry]) => {
+        if (entry.isIntersecting) {
+          setIsInView(true)
+          observer.disconnect()
+        }
+      },
+      {
+        rootMargin: isMobile ? "50px" : "100px", // 移动端更小的预加载距离
+        threshold: 0.1
+      }
+    )
+
+    if (imgRef.current) {
+      observer.observe(imgRef.current)
+    }
+
+    return () => observer.disconnect()
+  }, [priority, isMobile])
+
+  const handleLoad = () => {
+    setIsLoaded(true)
+    onLoad?.()
+  }
+
+  const handleError = () => {
+    setHasError(true)
+  }
+
+  // 根据设备选择合适的图片质量
+  const getOptimizedSrc = (originalSrc: string) => {
+    if (hasError) return "/placeholder.svg"
+    
+    // 如果是移动端，可以考虑使用更低质量的图片
+    if (isMobile && viewport.width < 768) {
+      // 这里可以添加图片质量优化逻辑
+      // 例如：添加 ?quality=80&w=400 等参数
+      return originalSrc
+    }
+    
+    return originalSrc
+  }
+
+  return (
+    <div 
+      ref={imgRef}
+      className={`relative overflow-hidden ${className}`}
+      onClick={onClick}
+    >
+      {/* 骨架屏加载状态 */}
+      {!isLoaded && isInView && (
+        <div className="absolute inset-0 bg-gray-200 animate-pulse">
+          <div className="flex items-center justify-center h-full">
+            <div className="w-8 h-8 border-2 border-gray-300 border-t-gray-600 rounded-full animate-spin"></div>
+          </div>
+        </div>
+      )}
+
+      {/* 错误状态 */}
+      {hasError && (
+        <div className="absolute inset-0 bg-gray-100 flex items-center justify-center">
+          <div className="text-center text-gray-500">
+            <svg className="w-12 h-12 mx-auto mb-2" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z" />
+            </svg>
+            <p className="text-xs">图片加载失败</p>
+          </div>
+        </div>
+      )}
+
+      {/* 实际图片 */}
+      {isInView && !hasError && (
+        <Image
+          src={getOptimizedSrc(src)}
+          alt={alt}
+          width={width}
+          height={height}
+          fill={!width || !height}
+          className={`object-cover transition-opacity duration-500 ${
+            isLoaded ? "opacity-100" : "opacity-0"
+          }`}
+          onLoad={handleLoad}
+          onError={handleError}
+          priority={priority}
+          draggable={false}
+          sizes={
+            isMobile 
+              ? "(max-width: 768px) 100vw, 50vw"
+              : "(max-width: 1024px) 50vw, 33vw"
+          }
+        />
+      )}
+
+      {/* 渐进式加载效果 */}
+      {isLoaded && (
+        <div className={`absolute inset-0 bg-gradient-to-t from-black/20 via-transparent to-transparent opacity-0 transition-opacity duration-300 ${onClick ? "group-hover:opacity-100" : ""}`} />
+      )}
+    </div>
+  )
+}

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>
   )
 }

frontend/components/photo-modal.tsx

@@ -1,11 +1,13 @@
 "use client"
 
-import { useEffect } from "react"
+import { useEffect, useRef } from "react"
 import Image from "next/image"
 import { X, ChevronLeft, ChevronRight, Camera, MapPin, Calendar } from "lucide-react"
 import { Button } from "@/components/ui/button"
 import { Badge } from "@/components/ui/badge"
 import { Card, CardContent } from "@/components/ui/card"
+import { useDrag } from "@use-gesture/react"
+import { useSpring, animated } from "react-spring"
 
 import { Photo } from '@/lib/queries'
 
@@ -17,6 +19,41 @@ interface PhotoModalProps {
 }
 
 export function PhotoModal({ photo, onClose, onPrev, onNext }: PhotoModalProps) {
+  const containerRef = useRef<HTMLDivElement>(null)
+
+  // 触摸手势支持
+  const [{ x }, api] = useSpring(() => ({ x: 0 }))
+
+  const bind = useDrag(
+    ({ down, movement: [mx], velocity: [vx], direction: [xDir], cancel }) => {
+      // 如果滑动速度足够快或者滑动距离超过阈值，触发切换
+      const trigger = Math.abs(mx) > window.innerWidth * 0.3 || Math.abs(vx) > 0.5
+
+      if (trigger && !down) {
+        // 根据滑动方向决定前进或后退
+        if (xDir > 0) {
+          onPrev() // 向右滑动，显示上一张
+        } else {
+          onNext() // 向左滑动，显示下一张
+        }
+        cancel() // 取消手势
+      }
+
+      // 设置拖拽动画
+      api.start({
+        x: down ? mx : 0,
+        immediate: down,
+        config: { tension: 300, friction: 30 }
+      })
+    },
+    {
+      axis: 'x',
+      bounds: { left: -window.innerWidth, right: window.innerWidth },
+      rubberband: true,
+      filterTaps: true,
+    }
+  )
+
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
       switch (e.key) {
@@ -47,7 +84,7 @@ export function PhotoModal({ photo, onClose, onPrev, onNext }: PhotoModalProps)
       <Button
         variant="ghost"
         size="sm"
-        className="absolute top-4 right-4 z-10 text-white hover:bg-white/10"
+        className="absolute top-4 right-4 z-10 text-white hover:bg-white/10 min-h-[44px] min-w-[44px] p-2"
         onClick={onClose}
       >
         <X className="h-6 w-6" />
@@ -57,7 +94,7 @@ export function PhotoModal({ photo, onClose, onPrev, onNext }: PhotoModalProps)
       <Button
         variant="ghost"
         size="sm"
-        className="absolute left-4 top-1/2 -translate-y-1/2 z-10 text-white hover:bg-white/10"
+        className="absolute left-4 top-1/2 -translate-y-1/2 z-10 text-white hover:bg-white/10 min-h-[44px] min-w-[44px] p-2"
         onClick={onPrev}
       >
         <ChevronLeft className="h-8 w-8" />
@@ -66,7 +103,7 @@ export function PhotoModal({ photo, onClose, onPrev, onNext }: PhotoModalProps)
       <Button
         variant="ghost"
         size="sm"
-        className="absolute right-4 top-1/2 -translate-y-1/2 z-10 text-white hover:bg-white/10"
+        className="absolute right-4 top-1/2 -translate-y-1/2 z-10 text-white hover:bg-white/10 min-h-[44px] min-w-[44px] p-2"
         onClick={onNext}
       >
         <ChevronRight className="h-8 w-8" />
@@ -75,16 +112,22 @@ export function PhotoModal({ photo, onClose, onPrev, onNext }: PhotoModalProps)
       <div className="w-full max-w-7xl mx-auto grid lg:grid-cols-3 gap-6 h-full max-h-[90vh]">
         {/* Main image */}
         <div className="lg:col-span-2 relative flex items-center justify-center">
-          <div className="relative w-full h-full max-h-[80vh] flex items-center justify-center">
+          <animated.div 
+            ref={containerRef}
+            {...bind()}
+            style={{ x }}
+            className="relative w-full h-full max-h-[80vh] flex items-center justify-center touch-pan-y cursor-grab active:cursor-grabbing"
+          >
             <Image
               src={photo.src || "/placeholder.svg"}
               alt={photo.title}
               width={1200}
               height={800}
-              className="max-w-full max-h-full object-contain"
+              className="max-w-full max-h-full object-contain select-none"
               priority
+              draggable={false}
             />
-          </div>
+          </animated.div>
         </div>
 
         {/* Photo information */}
@@ -144,12 +187,14 @@ export function PhotoModal({ photo, onClose, onPrev, onNext }: PhotoModalProps)
                   </div>
                 </div>
 
-                {/* Keyboard shortcuts */}
+                {/* Keyboard shortcuts and gestures */}
                 <div className="pt-4 border-t border-gray-200">
-                  <h3 className="text-sm font-medium text-gray-900 mb-2">快捷键</h3>
+                  <h3 className="text-sm font-medium text-gray-900 mb-2">操作说明</h3>
                   <div className="text-xs text-gray-500 space-y-1">
                     <div>ESC - 关闭</div>
                     <div>← → - 切换图片</div>
+                    <div className="md:hidden">左右滑动 - 切换图片</div>
+                    <div className="hidden md:block">拖拽图片 - 切换图片</div>
                   </div>
                 </div>
               </div>