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-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>