feat: 实现便携版并增加一键导出功能

.gitignore

@@ -0,0 +1,24 @@
+# Dependencies
+node_modules/
+
+# Database and user data (Portable data)
+accounts.db
+data/
+*.db-journal
+
+# Exports (Contains sensitive information)
+accounts_export.txt
+export.js
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Production build (if you pack the app later)
+dist/
+build/