- Light/dark/system theme (Settings > General) via nativeTheme.themeSource
driving prefers-color-scheme across chrome, settings, popover, and home.
- Search box redesigned: a magnifier icon opens the engine dropdown, the rest
is a wider typing field; styled to match the browser (was a raw <select>).
- Trimmed built-in engines to DuckDuckGo/Google/Brave/Bing/Startpage/Yandex;
custom engines still add/remove via "Add / edit engines…".
- WebRTC: the "WebRTC Network Limiter" extension can't run in Electron
(chrome.privacy API is unavailable), so its function is now a native
4-mode WebRTC IP policy in Settings > Privacy.
- Address-bar placeholder: "Ask a search engine or enter web address".
