• Four rows on the 4-inch Guition, as a choice. New screen asks how many tiles go on a page: two columns of three,
  as before, or of four with smaller tiles, for a screen with many switches. Every card works in every size on four
  rows too. The choice is one line in the screen's own YAML (GRID_ROWS: "4"), and a screen already built with three
  rows gets four by adding that line and installing it again: its saved layout moves on to four rows by itself.
• An offline screen built with four rows keeps its own grid in the editor; the app reads it from the screen's YAML.
• Only the Guition gets new firmware (0.18.1), which is the same as before for a screen with three rows. Other screens
  get nothing new.
• Tested: tools/check.sh with new tests (the choice in New screen, the line in the screen's YAML, the eight cards the
  board takes on four rows, the grid of an offline screen), the Guition built with three and with four rows on ESPHome
  2026.9.0 and 2026.6.2, and rendered with four rows. Not yet seen on the glass of a Guition with four rows.