chore: commit workspace updates

web/src/lib/markdown-plain-text.ts

@@ -0,0 +1,22 @@
+// 把 Markdown 消息压成一行纯文本，用于历史列表预览和标题：
+// 去掉记号本身（##、**、[]() 等），保留可读内容；围栏代码块整体替换为占位词。
+export function markdownPlainText(value: string, codePlaceholder = "代码块") {
+    return value
+        .replace(/```[\s\S]*?(?:```|$)/gu, ` ${codePlaceholder} `)
+        .replace(/^\s*\|?[\s:|-]*-[\s:|-]*\|?\s*$/gmu, " ")
+        .replace(/`([^`]*)`/gu, "$1")
+        .replace(/!\[([^\]]*)\]\(([^)]*)\)/gu, (_, alt: string, url: string) => ` ${alt || url} `)
+        .replace(/\[([^\]]*)\]\(([^)]*)\)/gu, "$1")
+        .replace(/^\s{0,3}#{1,6}\s+/gmu, "")
+        .replace(/^\s{0,3}>\s?/gmu, "")
+        .replace(/^\s{0,3}(?:[-*_]\s*){3,}$/gmu, " ")
+        .replace(/^\s*[-*+]\s+/gmu, "")
+        .replace(/^\s*\d+[.)]\s+/gmu, "")
+        .replace(/(\*\*|__)(.*?)\1/gu, "$2")
+        .replace(/~~(.*?)~~/gu, "$1")
+        .replace(/(^|\W)(\*|_)(?=\S)([\s\S]*?\S)\2(?=\W|$)/gu, "$1$3")
+        .replace(/<[^>]+>/gu, " ")
+        .replace(/\|/gu, " ")
+        .replace(/\s+/gu, " ")
+        .trim();
+}