feat: 增强纹理图集工具交互体验

新增 ZIP 打包导出、精灵选择高亮、点击拾取等交互功能

- 新增 JSZip 依赖，支持一键打包下载图集图片和元数据文件
- CanvasPreview 新增精灵选择功能，支持点击/多选选择，带脉冲动画高亮效果
- 新增图片缓存机制，优化重绘性能
- FileListPanel 新增选中项自动滚动到可视区域
- 优化防抖延迟和加载状态视觉效果

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

package.json

@@ -26,6 +26,7 @@
     "clsx": "^2.1.1",
     "ffmpeg-static": "^5.2.0",
     "framer-motion": "^11.15.0",
+    "jszip": "^3.10.1",
     "lucide-react": "^0.468.0",
     "next": "^15.1.6",
     "react": "^19.0.0",
@@ -38,6 +39,7 @@
   },
   "devDependencies": {
     "@tailwindcss/typography": "^0.5.16",
+    "@types/jszip": "^3.4.0",
     "@types/node": "^22",
     "@types/react": "^19",
     "@types/react-dom": "^19",