From d7ece5b4a9d327ff5d933bfb60b64f82acb98cc8 Mon Sep 17 00:00:00 2001
From: michaelxer <52305679+michaelxer@users.noreply.github.com>
Date: Sun, 7 Jun 2026 23:16:58 +0700
Subject: [PATCH] fix: show backend error detail in context-popup compact
 button (#2721)

When the context-popup compact button receives a non-OK response (e.g.
409 for active-run), the error detail from the backend was being
discarded in favor of a generic 'Compaction failed' message.

Now parses the JSON response body for non-OK responses and prefers the
detail field when present, matching the behavior of the /compact slash
command. Uses textContent for safe rendering.

Co-authored-by: michaelxer <michaelxer@users.noreply.github.com>
---
 static/js/chatRenderer.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/static/js/chatRenderer.js b/static/js/chatRenderer.js
index 8b648d634..088142302 100644
--- a/static/js/chatRenderer.js
+++ b/static/js/chatRenderer.js
@@ -1877,7 +1877,13 @@ export function displayMetrics(messageElement, metrics) {
                 }
               }, 200);
             } else {
-              compactBody.innerHTML = '<span style="color:var(--red);">Compaction failed. Try again later.</span>';
+              let detail = 'Compaction failed. Try again later.';
+              try {
+                const err = await res.json();
+                if (err.detail) detail = err.detail;
+              } catch {}
+              compactBody.textContent = detail;
+              compactBody.style.color = 'var(--red)';
             }
           } catch (err) {
             clearInterval(waveInterval);