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Context: since the game is running on Godot, the HTML5/Web export automatically cuts off the browser's access to local system fonts for security and performance reasons. This is why character U+2726 (and potentially others) triggers a "tofu" blank square inside Chrome, even if the user has the proper fonts installed on their PC.

To fix this, add fallback fonts for the icons you're using. For example, for U+2726, you can simply download the free font file "NotoSansSymbols2-Regular.ttf" (or the Google Noto Symbols 2 family) and add it directly inside your Godot project. Then, assign it to the "Font Fallbacks" array of your custom theme, or directly inside your main UI font resources. Godot will then automatically fetch the missing icons from it.