From e1d69bc43307b08cb8df0e3b06b44733f35d059f Mon Sep 17 00:00:00 2001
From: tikitoki <zc19941011@gmail.com>
Date: Fri, 15 May 2026 15:05:04 +0800
Subject: [PATCH] fix(ui): enable sidebar markdown code copying

Summary:
- Add the existing delegated markdown code-block copy handler to the Control UI chat sidebar container.
- Fix sidebar-rendered markdown code copy buttons that previously emitted no clipboard write because `.chat-sidebar` sits outside `.chat-thread`.

Verification:
- Unpatched current `origin/main` (`b24a6d2cbd636b0b39b732c962d58e574c748abe`) + temporary regression assertion: `pnpm test ui/src/ui/views/chat.test.ts -t "chat sidebar markdown copy"` failed with 0 `navigator.clipboard.writeText` calls.
- PR patch applied onto current `origin/main` + same temporary regression assertion: `pnpm test ui/src/ui/views/chat.test.ts -t "chat sidebar markdown copy"` passed, 1 test passed and 32 skipped.
- Live PR state before merge: `MERGEABLE`, `CLEAN`, head `2e04e981e992b32920476edc648009ddff7976d0`.
- Duplicate sweep found no same-failure duplicate PR/issue.
- Security check clear: UI event binding only; no dependency, workflow, auth, secret, network, or command-execution surface changes.

Known proof gap:
- No full browser walkthrough was run; the focused jsdom proof covers the exact DOM delegation boundary.

Thanks @tikitoki.
---
 ui/src/ui/views/chat.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ui/src/ui/views/chat.ts b/ui/src/ui/views/chat.ts
index 096a83f0341..d8255a1c466 100644
--- a/ui/src/ui/views/chat.ts
+++ b/ui/src/ui/views/chat.ts
@@ -1313,7 +1313,7 @@ export function renderChat(props: ChatProps) {
                 .label=${t("nav.resize")}
                 @resize=${(e: CustomEvent) => props.onSplitRatioChange?.(e.detail.splitRatio)}
               ></resizable-divider>
-              <div class="chat-sidebar">
+              <div class="chat-sidebar" @click=${handleCodeBlockCopy}>
                 ${renderMarkdownSidebar({
                   content: props.sidebarContent ?? null,
                   error: props.sidebarError ?? null,