Plugin API: the setpoint digits as Font::DIGITS, for large numbers on large tiles

A plugin's largest font today is Font::VALUE (watch_value, 38 px on the standard look). On a large tile that leaves the numbers small: my Custom card plugin on a 3x2 tile of the 7-inch JC1060P470 shows two counts and a bar, and the numbers use a fraction of the room (first photo). Tessera's own cards in that room take the setpoint digits.

The setpoint digits are already in every build (setpoint_digits in packages/core.yaml, 64 px on the standard look), so handing them to plugins costs no flash and keeps the fixed set of fonts. I tried this on dev at 0ce92b27, on the 7-inch:

--- a/components/smart_display/plugin_api.h
+++ b/components/smart_display/plugin_api.h
-enum class Font : uint8_t { VALUE, HEADLINE, TITLE, BODY_LARGE, BODY, ICON, ICON_SMALL };
+// DIGITS: the climate card's setpoint digits, larger than VALUE; only digits, '-', '.', ',', '°' and '%'.
+enum class Font : uint8_t { VALUE, HEADLINE, TITLE, BODY_LARGE, BODY, ICON, ICON_SMALL, DIGITS };
--- a/components/smart_display/plugin_host.cpp
+++ b/components/smart_display/plugin_host.cpp
     case Font::ICON_SMALL: face = rt::mini_icon_font; break;    // materialdesign_icons_mini
+    case Font::DIGITS: face = rt::setpoint_font ? rt::setpoint_font : rt::watch_value_font; break;  // setpoint_digits

The new value goes last, so nothing else moves. The plugin takes DIGITS only where every value it shows has just those glyphs and the face fits, as runtime_tiles does with face_covers(setpoint_font, value), and otherwise steps down to VALUE as before (second photo: the same card with DIGITS). A card with a word among its values (a lock's "open", a state of "unknown") stays in VALUE for all its values, so one card keeps one size; it is decided again with every new value. A large face with every letter would cost flash on every board, the 4 MB ones first, which is why I'd keep it to the digits that are already there. It would need a new minor of the plugin API, so a plugin that uses it is refused by older firmware.

Would you take this, or would you rather offer large digits another way?

Photos: 1: Zutritt 3x2 today (38 px), relatively small on large tile:

2: Zutritt 3x2 with DIGITS:

3: Wohnzimmer-Card with DIGITS:

Stefan