[Bug]: Capacitor WebView treats URLs with dots as file requests, breaking SPA routing and page reload.

### Capacitor Version

💊 Capacitor Doctor 💊

Installed Dependencies:

@capacitor/cli: 7.4.2
@capacitor/core: 7.4.2
@capacitor/android: 7.4.2
@capacitor/ios: 7.4.2

[success] iOS looking great! 👌
[success] Android looking great! 👌

### Other API Details

```Shell

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### Platforms Affected

- [x] iOS
- [x] Android
- [ ] Web

### Current Behavior

When navigating to URLs that contain dots (.) in the path, Capacitor's WebView treats them as file requests rather than SPA routes. This causes a 404 error instead of serving the `index.html` file for client-side routing.

For example:
- `http://localhost/@username` → Works (serves index.html)
- `http://localhost/@user.name` → Fails (404 - treats as file request)
- `http://localhost/page.section` → Fails (404 - treats as file request)

And shows console error in Xcode:
⚡️ WebView failed provisional navigation
⚡️ Error: The file “@user.name” couldn’t be opened because there is no such file.

And in Android, An error page is shown with Page is not available.

### Expected Behavior

All non-asset URLs should serve `index.html` to allow the SPA router to handle routing, regardless of whether the URL contains dots.

### Project Reproduction

https://github.com/iamriajul/capacitor-dot-in-urls-spa-navigation-issue-reproduction

### Additional Information

_No response_