fix: move watcher cleanup from close handler to before-quit only

The close event is cancelable — if the user cancels the unsaved changes
dialog, watchers would remain closed for the rest of the session.
Move closeAllWatchers() to before-quit which only fires on actual quit.

Author: cchirag

packages/bruno-electron/src/index.js

@@ -393,7 +393,6 @@ app.on('ready', async () => {
 
   mainWindow.on('close', (e) => {
     e.preventDefault();
-    closeAllWatchers();
     terminalManager.cleanup(mainWindow.webContents);
     ipcMain.emit('main:start-quit-flow');
   });