bug: full swipe expandable item does not work

### 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

If you try to swipe an `` that is expandable, it won't fully swipe and trigger ion-swipe event.

### Expected Behavior

It should fully swipe and emit event, like gmail app does.

### Steps to Reproduce

Open the demo on mobile device:
https://ionicframework.com/docs/api/item-sliding#expandable-options
Try to swipe item fully across screen.

### Code Reproduction URL

https://ionicframework.com/docs/api/item-sliding#expandable-options

### Ionic Info

[repositories/fareclock-tc-next] $ ionic info

Ionic:

Ionic CLI : 7.2.1 (/Users/jacob/.volta/tools/image/packages/@ionic/cli/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/vue 8.8.9

Capacitor:

Capacitor CLI : 8.4.0
@capacitor/android : 8.4.0
@capacitor/core : 8.4.0
@capacitor/ios : 8.4.0

Utility:

cordova-res : 0.15.4
native-run : 2.0.3

System:

NodeJS : v24.14.0 (/Users/jacob/.volta/tools/image/node/24.14.0/bin/node)
npm : 11.9.0
OS : macOS Unknown

### Additional Information

_No response_

Reproduce the issue in the item-sliding expandable-options demo at the Ionic documentation URL, using a mobile device as described. Trace the item-sliding implementation and its swipe handling, then verify that a full swipe expands across the screen and emits the ion-swipe event.

索引モデルが issue の本文から書いたものです。