Support running test-electron manually

app/main.ts

@@ -2138,6 +2138,10 @@ ipc.handle('getScreenCaptureSources', async () => {
 
 if (isTestEnvironment(getEnvironment())) {
   ipc.handle('ci:test-electron:done', async (_event, info) => {
+    if (!process.env.TEST_QUIT_ON_COMPLETE) {
+      return;
+    }
+
     process.stdout.write(
       `ci:test-electron:done=${JSON.stringify(info)}\n`,
       () => app.quit()

ts/build/test-electron.ts

@@ -19,6 +19,7 @@ const stdout = execFileSync(ELECTRON, [ROOT_DIR], {
   env: {
     ...process.env,
     NODE_ENV: 'test',
+    TEST_QUIT_ON_COMPLETE: 'on',
   },
   encoding: 'utf8',
 });