tails-screen-locker just sort of appears on the screen without any explanation during descriptor importing

[BenWestgate]

This step can be either really fast or slow depending on the blockchain progress and how busy the node is.

I should say more obviously, this will be slow, lock your screen if you have to step away from the computer. BEFORE showing the dialog for tails-screen-locker. Otherwise it just sits there and the notification with explanation expires.

[BenWestgate]

Lets make a file called "remind-lock-screen" that checks if the user has a screen lock passphrase set and notifies them every 3 +/- minutes if not, else clears its notifications and exits. This is for chainstate-preload.

Press the lock screen keys to lock your computer if you need to walk away from it.

[BenWestgate]

This also defines the scope of bails-wallet for seed recovery, it should build the descriptor and stop there. (This means in L2, we can also let it display a QR of that descriptor.) That way Bails can offer some entertainment during long steps like descriptor importing, as well as me not need to worry about teaching bails-wallet how to detect and import descriptors.

[BenWestgate]

We can't kill notifications anymore. But we do try to set the screen lock password during each boot. If this needs to be reopened we will replace it with a dialog since notifications create spam that reduces privacy on the lock screen.