Adds early enabling of WebAuthn and platform authenticator features in Chromium via command line switches, and injects diagnostics to check availability in the renderer. CSS z-index values are increased for navigation and menu elements to ensure proper layering above <webview> surfaces. Updates Electron to 37.3.1 and expands site-history.json with additional authentication-related URLs.
Changed the icon paths for macOS, Windows, and Linux builds to use the new Nebula-Favicon assets. This ensures each platform uses the appropriate icon format.
Eliminated the custom site history dropdown UI and its related event handlers from script.js. Updated Electron to version 37.2.4 in package.json and package-lock.json. Cleared entries from search-history.json and site-history.json.
andrew