Add confirmation alert when leaving page that has unsaved text

[Hiviexd]

it's not uncommon for people to lose their progress on a mod that's thousands of letters long simply by accidentally refreshing/opening a new link within that tab, and it can get extremely infuriating at times. here's a recreation of such scenario.

I propose to add an alert that warns you about those pending changes before leaving the page, that would be an extremely appreciated ux improvement.

[peppy]

Very weird that the content isn't restored on returning to the page, but having a confirmation is a good first step. Bumping up to highest priority as this is a pretty horrible UX oversight.

[notbakaneko]

Forum posts have a thing that saves to localstorage while composing; sounds like this could use the same thing