Function sanitizeU8g2FontName

app.js:1743–1749

(value)

}

function sanitizeU8g2FontName(value) {
  const v = String(value || "").trim();
  // Keep it strict so we don't generate invalid C++ identifiers.
  if (U8G2_FONT_VALUES.has(v)) return v;
  if (/^u8g2_font_[A-Za-z0-9_]+$/.test(v)) return v; // allow custom fonts user knows exist
  return DEFAULT_U8G2_FONT;
}

function getElementFontForMode(el, mode) {
  if (!el) return mode === "u8g2" ? DEFAULT_U8G2_FONT : DEFAULT_TFT_FONT;