重构uiController的图片查看器，增加键盘和触摸滑动导航功能

styles.css

@@ -434,6 +434,21 @@ body {
     align-items: center;
     justify-content: center;
     background-color: #000;
+    position: relative;
+}
+
+/* 模态框图片触摸优化 */
+#viewerModalImage {
+    user-select: none;
+    -webkit-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
+    touch-action: pan-x pan-y;
+    cursor: grab;
+}
+
+#viewerModalImage:active {
+    cursor: grabbing;
 }
 
 /* 翻页按钮样式 */
@@ -471,6 +486,33 @@ body {
     color: white;
 }
 
+/* 触摸反馈 */
+.modal-fullscreen .modal-body .btn-light:active {
+    transform: scale(0.95);
+}
+
+/* 移动端响应式样式 */
+@media (max-width: 768px) {
+    .modal-fullscreen .modal-body .btn-light {
+        width: 40px;
+        height: 40px;
+        font-size: 16px;
+    }
+    
+    #prevImageBtn {
+        left: 10px;
+    }
+    
+    #nextImageBtn {
+        right: 10px;
+    }
+    
+    /* 为触摸设备优化图片显示 */
+    #viewerModalImage {
+        touch-action: manipulation;
+    }
+}
+
 /* 图像查看模态框特定样式 */
 #imageViewerModal .modal-content {
     border-radius: 15px;