Ensure files are actually saved on tauri

[Muhammed-Rahif]

In the below lines of code users can start saving the file but not successfully complete saving the file (eg: cancelling the save popup).

Notpad/src/lib/helpers/menubar/file-options.ts

Lines 241 to 250 in f28b5f5

	try {
	if (isTauri) await this.saveFileInTauri(saveAs);
	else if (typeof showSaveFilePicker != 'undefined') {
	await this.saveFileInDesktopBrowser(saveAs);
	} else await this.saveFileLegacy();
	Notpad.editors.setIsSaved(Notpad.editors.getActive().id, true);
	} catch (err) {
	console.error(err);
	}

In other words, there no validation that the user saved the file successfully, it just assumes, which is not best practice here. Instead it should check the status of saving process and only set Notpad.editors.setIsSaved(Notpad.editors.getActive().id, true); if it was successfully saved to local.

This can't be achieved in web browsers as stated here: https://stackoverflow.com/questions/41334881/detect-when-user-accepts-to-download-a-file

[github-actions]

👋 Hi @Muhammed-Rahif! Thank you for taking the time to report an issue in Notpad.
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[Abdullanabdulaziz]

Hi, I’d like to work on this issue. Could you assign it to me?