v0.1.1-ke-gui-fixes

Added

• 480×272 small-screen layout + a global font pass for the KE.
• Bed-mesh panel redesign — table by default, 3D fullscreen.
• Panels gated behind print state (LED ↔ Fine Tune swap).

Fixed

• Display sleep on the Ingenic X2000 DSI — disable fbdev_blank on sleep (the panel was otherwise
  unrecoverable) and invalidate the screen on wake (fixes the white screen after sleep).
• display_rotate=2 default for the KE's upside-down screen mount.
• Reduced LV_FONT_DEFAULT to montserrat_12 on small screens.

Changed

• Installer: uninstall mode, printer.cfg backup before modify, silent-include fix, and guards for
  files the KE doesn't ship.