Issue Summary:

SVG icons used in the new navigation (Nav4) appear visually darker due to an unintended CSS filter being applied. Specifically, the SVG includes a <filter id="changeFillColor"> element that is inadvertently triggered by the navigation system.

Steps to Reproduce

1. Configure a Forge app to use an SVG icon via the manifest:
   icon: resource:kit-assets;images/app-logo.svg

1. Deploy the app and navigate to the app entry in the new Jira navigation (Nav4).

1. Observe the visual appearance of the icon in the sidebar.

Expected Results

The SVG icon should retain its original appearance and colors, matching how it looks outside of the Jira navigation.

Actual Results

The icon appears significantly darker than intended, due to the <filter id="changeFillColor"> being unintentionally applied or interpreted by the UI rendering engine.

Workaround

As a temporary solution, replacing the SVG icon with a PNG version avoids the issue.