Continuously records gameplay in the background when a game is connected.
Keeps the last N minutes (configurable) as ~30s self-contained segment files
on disk, with auto-trimming and thumbnail generation per segment.
C++ CortexRecorder writes .seg binary format in real-time, integrated into
StreamingEngine alongside existing ClipRecorder. StreamingManager routes
frames to cortex-only engine when not streaming, and enables cortex on the
streaming engine during live streams for seamless coexistence.
New Cortex tab in bottom navigation with enable toggle, duration presets,
storage usage, and session list with thumbnails.
