feat(desktop-client): 阶段4-6 Electron EXE 客户端（登录/课表/作业/通知/成绩/设置 + Socket.IO 实时 + IndexedDB 离线缓存与自动同步 + electron-builder 打包）

packages/desktop-client/tsconfig.node.json

@@ -0,0 +1,13 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "noEmit": true,
+    "types": ["node"],
+    "declaration": false,
+    "declarationMap": false
+  },
+  "include": ["src/main/**/*.ts", "src/preload/**/*.ts", "src/types/**/*.d.ts", "scripts/**/*.mjs"]
+}