Linkify URLs in Actions workflow logs (#36986)

Detect URLs in Actions log output and render them as clickable links,
similar to how GitHub Actions handles this. Pre-existing links from
ansi_up's OSC 8 parsing are also kept intact.

---------

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: Claude (claude-opus-4-6) <noreply@anthropic.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/js/utils/url.ts

@@ -2,6 +2,34 @@ export function pathEscapeSegments(s: string): string {
   return s.split('/').map(encodeURIComponent).join('/');
 }
 
+// Match HTML tags (to skip) or URLs (to linkify) in HTML content
+const urlLinkifyPattern = /(<([-\w]+)[^>]*>)|(<\/([-\w]+)[^>]*>)|(https?:\/\/[^\s<>"'`|(){}[\]]+)/gi;
+const trailingPunctPattern = /[.,;:!?]+$/;
+
+// Convert URLs to clickable links in HTML, preserving existing HTML tags
+export function linkifyURLs(html: string): string {
+  let inAnchor = false;
+  return html.replace(urlLinkifyPattern, (match, _openTagFull, openTag, _closeTagFull, closeTag, url) => {
+    // skip URLs inside existing <a> tags
+    if (openTag === 'a') {
+      inAnchor = true;
+      return match;
+    } else if (closeTag === 'a') {
+      inAnchor = false;
+      return match;
+    }
+    if (inAnchor || !url) {
+      return match;
+    }
+
+    const trailingPunct = url.match(trailingPunctPattern);
+    const cleanUrl = trailingPunct ? url.slice(0, -trailingPunct[0].length) : url;
+    const trailing = trailingPunct ? trailingPunct[0] : '';
+    // safe because regexp only matches valid URLs (no quotes or angle brackets)
+    return `<a href="${cleanUrl}" target="_blank">${cleanUrl}</a>${trailing}`; // eslint-disable-line github/unescaped-html-literal
+  });
+}
+
 /** Convert an absolute or relative URL to an absolute URL with the current origin. It only
  *  processes absolute HTTP/HTTPS URLs or relative URLs like '/xxx' or '//host/xxx'. */
 export function toOriginUrl(urlStr: string) {