Version management: Each system state is versioned, making tracking easier
Two characters might have identical Unicode skeletons but render differently in specific fonts, or have different skeletons but render identically in a particular typeface. Detecting this requires rendering glyphs and comparing pixel output. No purely Unicode-data-based approach handles it, and UTS #39 does not attempt to.
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ChatGPT要变成新的App Store，但清算期也来了
// ⚠️ 易错点3：此处返回n而非0（完全有序无需排序，长度为0）