From c485a03946d5c67933ec1f66c99edc2f58edab93 Mon Sep 17 00:00:00 2001
From: Quentin Gliech <quentingliech@gmail.com>
Date: Sun, 5 Apr 2026 20:22:44 +0200
Subject: [PATCH] fix(web): preserve newlines in code copy-paste

Append a \n text node inside each .line span so copy-pasting from
the code block includes proper line breaks.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 webui2/src/components/code/file-viewer.tsx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/webui2/src/components/code/file-viewer.tsx b/webui2/src/components/code/file-viewer.tsx
index 41514cf392655e450ea0a4bf7894897968682294..0177d3a6942e86f4e5f58f7f122ccdc5a09020dd 100644
--- a/webui2/src/components/code/file-viewer.tsx
+++ b/webui2/src/components/code/file-viewer.tsx
@@ -95,6 +95,9 @@ function lineNumberTransformer(): ShikiTransformer {
   return {
     line(node, line) {
       node.properties["dataLineNumber"] = line;
+      // Append a \n text node inside each .line so copy-paste preserves newlines
+      // (we strip the inter-element whitespace nodes in code() below).
+      node.children.push({ type: "text", value: "\n" });
     },
     // Remove whitespace text nodes between .line spans — they create
     // empty anonymous table rows when using display: table-row.