BUG: White screen flash when clicking profile avatar in navbar

### Is there an existing issue for this?

- [x] I have searched the existing issues

### What happened?

Description

Clicking the user profile avatar in the navbar (top-right) triggers a brief white-screen flash before navigating to the settings page. This creates a jarring visual experience and breaks expected smooth client-side navigation.

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Steps to Reproduce
1. Start the PictoPy application (npm run tauri dev).
2. Navigate to any page (Home, AI Tagging, Albums, etc.).
3. Click the user avatar in the top-right corner of the navbar.
4. Observe the white flash before the settings page loads.

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Expected Behavior

Navigation to the settings page should be seamless, with no flicker or white-screen flash. It should behave like standard client-side routing.

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Actual Behavior
• A complete white flash/blink appears on the screen.
• A full page reload occurs.
• The settings page loads only after the flash.

### Record

- [x] I agree to follow this project's Code of Conduct

### Checklist before Submitting

- [x] Have you updated docs for it?
- [x] Have you added unit tests?
- [x] Have you made sure unit tests pass?
- [x] Have you made sure code formatting is correct?
- [x] Do Your changes passes all tests?