Beeb 0.10.8: new homescreen layouts, live subtitles and Red Button streams for Apple TV

I've put together another update to Beeb, my independent, open-source BBC player for Apple TV.

• New homescreen layouts: choose Classic or Modern in Settings. Modern gives you a floating Topbar or a Sidebar. Classic keeps the earlier compact topbar and framed banner.
• Immersive modern homescreens: large programme artwork and Beeb's pink focus glow.
• Your preference is remembered: Settings → Homescreen Layout. The Topbar/Sidebar choice appears under Modern and is retained when you switch to Classic and back.
• Press the RED button: it's an option in every live player's controls. Open Red Button or Red Button UHD when BBC is broadcasting those feeds.
• Live TV subtitles: BBC's live captions now work through Apple's native subtitle rendering and controls when available.
• Continuous browsing: scroll through categories, A–Z and the indexed 4K UHD listing without Previous/Next buttons. Programme batches load as needed rather than loading everything at launch.
• A cleaner Browse screen: wider, readable category cards with icons.
• More reliable episode loading: updated BBC playback discovery and version selection, fixing the incorrect-format errors encountered by some users.