feat(engine): 优化字幕引擎、提升程序健壮性

- 优化服务器启动流程，增加异常处理
- 主程序和字幕引擎的 WebSocket 端口号改为随机生成

package.json

@@ -1,7 +1,7 @@
 {
   "name": "auto-caption",
   "productName": "Auto Caption",
-  "version": "0.5.1",
+  "version": "0.6.0",
   "description": "A cross-platform subtitle display software.",
   "main": "./out/main/index.js",
   "author": "himeditator",
@@ -13,7 +13,7 @@
     "typecheck:web": "vue-tsc --noEmit -p tsconfig.web.json --composite false",
     "typecheck": "npm run typecheck:node && npm run typecheck:web",
     "start": "electron-vite preview",
-    "dev": "chcp 65001 && electron-vite dev",
+    "dev": "electron-vite dev",
     "build": "npm run typecheck && electron-vite build",
     "postinstall": "electron-builder install-app-deps",
     "build:unpack": "npm run build && electron-builder --dir",