Favicon is not visible in dark mode, Improve favicon visibility for dark browser themes

Describe the bug

The Aave favicon is black, making it effectively invisible when viewed in browsers using dark mode. This reduces brand visibility and makes it difficult to identify the Aave tab among other open tabs. The issue was observed on the Aave web app.

To Reproduce

1. Open the Aave web app in a browser.
2. Enable your browser or operating system's dark mode.
3. Open the site in a new tab.
4. Observe that the favicon is black and blends into the dark browser tab background, making it difficult or impossible to see.

Expected behavior

The favicon should remain clearly visible in both light and dark browser themes. This can be achieved by providing a dark-mode-specific favicon, using an SVG favicon that supports prefers-color-scheme, or designing a favicon with sufficient contrast against dark tab backgrounds.

Screenshots

Please see the two screenshot below.

Desktop (please complete the following information):

• OS: macOS
• Browser: Chrome
• Version: Latest

Smartphone (please complete the following information):

• Device: N/A
• OS: N/A
• Browser: N/A
• Version: N/A

Additional context

Modern browsers do not automatically invert favicon colors for dark mode. Since the current favicon is predominantly black, it becomes nearly invisible against dark tab backgrounds. Providing separate light/dark favicons or an adaptive SVG favicon would improve visibility and overall user experience.

Start by locating the Aave web app's favicon asset and the document entry point that references it, then reproduce the issue in Chrome with dark mode enabled. Update the favicon treatment so it remains visible in both light and dark browser themes, and verify the result in each theme.