feat(update): 重构自动更新系统，使用 electron-updater 替代手动下载

- CI 构建 macOS 拆分为 x64/arm64 分别构建，合并 latest-mac.yml
- 主进程使用 electron-updater 管理检查、下载、安装全流程
- 渲染进程 UpdateModal 改为响应式同步主进程更新状态
- IPC 通道统一为 app-update:* 系列
- 窗口拦截外部链接在系统浏览器打开
- 新增 5 语言更新相关国际化文案

package.json

@@ -19,9 +19,11 @@
     "build": "electron-vite build",
     "postinstall": "electron-builder install-app-deps",
     "build:unpack": "npm run build && electron-builder --dir",
-    "build:win": "npm run build && electron-builder --win",
-    "build:mac": "npm run build && electron-builder --mac",
-    "build:linux": "npm run build && electron-builder --linux"
+    "build:win": "npm run build && electron-builder --win --publish never",
+    "build:mac": "npm run build && electron-builder --mac --x64 --publish never && cp dist/latest-mac.yml dist/latest-mac-x64.yml && electron-builder --mac --arm64 --publish never && cp dist/latest-mac.yml dist/latest-mac-arm64.yml && node scripts/merge_latest_mac_yml.mjs dist/latest-mac-x64.yml dist/latest-mac-arm64.yml dist/latest-mac.yml",
+    "build:mac:x64": "npm run build && electron-builder --mac --x64 --publish never && cp dist/latest-mac.yml dist/latest-mac-x64.yml",
+    "build:mac:arm64": "npm run build && electron-builder --mac --arm64 --publish never && cp dist/latest-mac.yml dist/latest-mac-arm64.yml",
+    "build:linux": "npm run build && electron-builder --linux --publish never"
   },
   "lint-staged": {
     "*.{ts,tsx,vue,js}": [
@@ -136,12 +138,8 @@
     "mac": {
       "icon": "resources/icon.icns",
       "target": [
-        {
-          "target": "dmg",
-          "arch": [
-            "universal"
-          ]
-        }
+        "dmg",
+        "zip"
       ],
       "artifactName": "${productName}-${version}-mac-${arch}.${ext}",
       "darkModeSupport": true,