Firmware 2026.7.0

• Add versioning
• Cardputer hardware abstraction rework
  • Remove M5Unified, M5GFX, and M5Cardputer
  • Replace M5GFX with "LovyanGFX"
  • Replace M5Cardputer with "Adafruit TCA8418"
• [BREAKING] Keyboard layout rework
  • Support keyboard layers based on key modifiers (Fn, OPT, Ctrl, Alt, Shift)
  • Allow overriding the base layout
  • Layout file format changed (check the Wiki for details)
  • Improve chat page Fn + Arrows logic (an empty input line does not require pressing Fn; the logic is reversed when typing)
• Power consumption reduced
  • Sleep mode (power saving): from ~52mA to ~22mA
• Remove G0 button handling
• Add more Unicode blocks to font
• Move shutdown and reset to the tools menu
• Move node name to the settings menu and make it editable
• Move status icons to the left side
• Add unread icon
• Fix chat input line truncated at the wrong side
• Do not pop up the message preview in the chat page