no grace period on auto screen lock.

### What Happened?

When auto-screen lock is triggered, it instantly locks up the screen. It provides no way to cancel the screen lock unless you yourself remember to do so. No visual cues are given.

### Steps to Reproduce

1. wait for auto screen lock.
2. see the action.

### Expected Behavior

A dimmed screen for a while or when screen is locked instant user input should cancel the lock.

### OS Version

7.x (Horus)

### Session Type

Classic Session (X11, This is the default)

### Software Version

Latest release (I have run all updates)

### Log Output

_No response_

### Hardware Info

I have nix's home-manager which changes dconf settings. It changes the following:

```nix
dconf.settings = {
"org/gnome/desktop/session" = {
idle-delay = "uint32 18";
};
"org/gnome/system/location" = {
enabled = false;
};
"io/elementary/desktop/agent-geoclue2" = {
location-enabled = false;
};
"org/gnome/desktop/privacy" = {
remember-recent-files = false;
show-full-name-in-top-bar = false;
remember-app-usage = false;
};
"org/gnome/settings-daemon/plugins/power" = {
sleep-inactive-battery-timeout = 30;
sleep-inactive-ac-timeout = 30;
};
};
```