chore: desktop: use OS agnostic paths

ui/desktop/app/styles/app.scss

@@ -217,6 +217,7 @@
 .rose-layout-global .rose-layout-global-body {
   main {
     flex-grow: 1;
+    overflow: auto;
   }
 }
 

ui/desktop/electron-app/config/forge.js

@@ -76,7 +76,7 @@ const createConfig = () => {
 
 // Save forge config file
 const saveConfig = (config, destination) => {
-  const configPath = `${destination}/forge.config.js`;
+  const configPath = path.join(destination, 'forge.config.js');
   console.log(`[forge-config] ${configPath}`);
   const content = `module.exports = ${JSON.stringify(config, null, 2)}`;
   fs.writeFileSync(configPath, content);

ui/desktop/electron-app/src/helpers/app-updater.js

@@ -50,7 +50,7 @@ const createAppUpdaterConfig = (url, version, destination) => {
     console.log(`[app-updater] url: ${url}, destination: ${destination}`);
   const json = { url, version };
   const config = JSON.stringify(json);
-  const configPath = `${destination}/feed.json`;
+  const configPath = path.join(destination, 'feed.json');
   if (debug) console.log(`[app-updater] config: ${config}`);
   fs.writeFileSync(configPath, config);
   return configPath;