fix(web): folder view navigation refresh

[yiningliu1]

Description

In the gallery-viewer component in the web directory, I saved the "currentViewAssetIndex" variable to localStorage whenever it was changed and set the variable to the value in localStorage upon page load (if it exists).

This change fixes a bug, where upon loading the page while navigating between images in folder view, the currentViewAssetIndex would be set to 0 by default, so using the right/left arrows to navigate between images results in the wrong ones.

Fixes #15222

How Has This Been Tested?

I went to folder view opened up images at varying positions, navigated between them, and deleted them, refreshing the page after each action to check if I continue at the proper index. I also checked navigation on other views to ensure these changes did not break them

Screenshots (if appropriate)

N/A

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if applicable
• I have no unrelated changes in the PR.
• I have confirmed that any new dependencies are strictly necessary.
• I have written tests for new code (if applicable)
• I have followed naming conventions/patterns in the surrounding code
• All code in src/services uses repositories implementations for database calls, filesystem operations, etc.
• All code in src/repositories/ is pretty basic/simple and does not have any immich specific logic (that belongs in src/services)

[github-actions]

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