bug: Exiting fullscreen via swipe down on iOS removes toolbar insets

### Prerequisites

- [x] I have read the [Contributing Guidelines](https://github.com/ionic-team/ionic-framework/blob/main/docs/CONTRIBUTING.md#creating-an-issue).
- [x] I agree to follow the [Code of Conduct](https://ionicframework.com/code-of-conduct).
- [x] I have searched for [existing issues](https://github.com/ionic-team/ionic-framework/issues) that already report this problem, without success.

### Ionic Framework Version

v8.x

### Current Behavior

When entering fullscreen mode via the browser fullscreen API on iOS, users can exit either by tapping the overlay (X) button or swiping down. If the user exits fullscreen by swiping down, the insets applied to the first toolbar are set to `0px`. This behavior does not occur when exiting fullscreen using the overlay button or through custom logic.
```
ion-header ion-toolbar:first-of-type {
padding-top: var(--ion-safe-area-top, 0);
}
```

### Expected Behavior

The insets should apply regardless how fullscreen mode was exited.

### Steps to Reproduce

1. Bring some element to fullscreen using the browser fullscreen API
2. Swipe down to exit fullscreen

### Code Reproduction URL

https://github.com/postmann/ionic-fullscreen/

### Ionic Info

```
Ionic:

Ionic CLI : 7.2.1 (/home/xxx/.nvm/versions/node/v20.18.0/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/react 8.5.7

Capacitor:

Capacitor CLI : 7.2.0
@capacitor/android : not installed
@capacitor/core : 7.2.0
@capacitor/ios : 7.2.0

Utility:

cordova-res : not installed globally
native-run : 2.0.1

System:

NodeJS : v20.18.0 (/home/xxx/.nvm/versions/node/v20.18.0/bin/node)
npm : 10.8.2
OS : Linux 5.15
```

### Additional Information

_No response_

Start with the fullscreen behavior shown in the reproduction URL and inspect how the first toolbar applies --ion-safe-area-top after the browser Fullscreen API exits on iOS. Reproduce the swipe-down exit, then verify that the inset remains applied as it does for the overlay-button and custom-logic paths.

Written by the indexing model from the issue text.