Dark Mode & Route Fixes

What's New

• Dark Mode: New appearance picker in the menu bar and Preferences > Appearance, with System, Light, and Dark options.

Bug Fixes

• Locked tabs no longer get closed when you switch away from a different space.
• Sidebar links matching a route now open in the configured profile (e.g. Safari Work) instead of the default one.
• The Open Next button now respects route and profile rules, like a regular sidebar click.
• Saving the current page when a route decides its destination no longer crashes the app.