Glucose v3.7.0: Convert from fullscreen overlay to resizable windowed app

• New Features
  • Added native window controls with live maximize-state tracking and improved maximize/restore behavior across view modes, including PiP/fullscreen.
  • Enhanced fullscreen/cinematic playback with accurate borderless fullscreen sizing per monitor and restoration of prior window geometry; added smoother draggable window regions.
• Bug Fixes
  • Added a startup reveal fail-safe so the window becomes visible even if setup status stalls.
  • Improved event-listener cleanup to avoid stale maximize/resize behavior.
• Style
  • Updated windowed chrome with rounded corners/shadows and removed rounded chrome for fullscreen playback.