优化 Electron 打包体积：排除源码与冗余依赖

配置 electron-builder files 仅打 out 产物，移除未用依赖并将 Vue 生态移至 devDependencies；koffi 仅解包 win32_x64 并在 afterPack 裁剪；打包前清理旧 zip。

app/scripts/check-native-dlls.js

@@ -14,6 +14,15 @@ const required = [
   'opencv_world490d.dll'
 ]
 
+const opencvRelease = path.join(nativeDir, 'opencv_world490.dll')
+const opencvDebug = path.join(nativeDir, 'opencv_world490d.dll')
+if (fs.existsSync(opencvRelease)) {
+  console.warn('提示: 检测到 opencv_world490.dll，生产环境建议用 Release 版替换 Debug 版 opencv_world490d.dll 以减小体积')
+} else if (fs.existsSync(opencvDebug)) {
+  const mb = Math.round(fs.statSync(opencvDebug).size / 1024 / 1024)
+  console.warn(`提示: 当前使用 Debug 版 OpenCV (${mb} MB)，可从 docs/API/lib 换 Release 版 opencv_world490.dll`)
+}
+
 const missing = required.filter((name) => !fs.existsSync(path.join(nativeDir, name)))
 if (missing.length) {
   console.error(`resources/native 缺少: ${missing.join(', ')}`)