build: 恢复 NSIS 打包支持（工具链缓存到本地，含 msi+nsis 双格式）

src-tauri/tauri.conf.json

@@ -26,7 +26,7 @@
   },
   "bundle": {
     "active": true,
-    "targets": "all",
+    "targets": ["msi", "nsis"],
     "icon": [
       "icons/32x32.png",
       "icons/128x128.png",