From e4315282a2f3fc7f54bd54c2fb9aaff007cd42cd Mon Sep 17 00:00:00 2001
From: Your Name <your.email@example.com>
Date: Mon, 16 Feb 2026 11:40:04 +0800
Subject: [PATCH] fix: keep remote image markdown when normalization fails

---
 app/(chat)/api/chat/route.ts | 39 +++++++++++++++++++++++++++---------
 1 file changed, 29 insertions(+), 10 deletions(-)

diff --git a/app/(chat)/api/chat/route.ts b/app/(chat)/api/chat/route.ts
index 1b68d533f..96917c7e6 100644
--- a/app/(chat)/api/chat/route.ts
+++ b/app/(chat)/api/chat/route.ts
@@ -929,18 +929,37 @@ async function normalizeAssistantImageMarkdown(
           altText,
           thumbnailUrl
         );
-        const hostedThumbnailUrl = await ensureHostedImageUrl(thumbnailUrl);
-        const hostedOriginalUrl =
-          originalUrl && originalUrl !== thumbnailUrl
-            ? await ensureHostedImageUrl(originalUrl)
-            : hostedThumbnailUrl;
 
-        uploadedUrls.push(hostedThumbnailUrl);
-        uploadedUrls.push(hostedOriginalUrl);
-        rebuilt += `![thumb|||${hostedOriginalUrl}|||${parsedImageSize || imageSize}](${hostedThumbnailUrl})`;
+        let hostedThumbnailUrl = thumbnailUrl;
+        let hostedOriginalUrl =
+          originalUrl && originalUrl !== thumbnailUrl ? originalUrl : thumbnailUrl;
+
+        try {
+          hostedThumbnailUrl = await ensureHostedImageUrl(thumbnailUrl);
+        } catch (error) {
+          console.error("[Chat API] Failed to normalize remote thumbnail URL:", error);
+        }
+
+        if (originalUrl && originalUrl !== thumbnailUrl) {
+          try {
+            hostedOriginalUrl = await ensureHostedImageUrl(originalUrl);
+          } catch (error) {
+            console.error("[Chat API] Failed to normalize remote original URL:", error);
+            hostedOriginalUrl = hostedThumbnailUrl || originalUrl;
+          }
+        } else {
+          hostedOriginalUrl = hostedThumbnailUrl;
+        }
+
+        const finalThumbnailUrl = hostedThumbnailUrl || thumbnailUrl;
+        const finalOriginalUrl = hostedOriginalUrl || finalThumbnailUrl;
+
+        uploadedUrls.push(finalThumbnailUrl);
+        uploadedUrls.push(finalOriginalUrl);
+        rebuilt += `![thumb|||${finalOriginalUrl}|||${parsedImageSize || imageSize}](${finalThumbnailUrl})`;
       } catch (error) {
-        console.error("[Chat API] Failed to normalize remote image URL:", error);
-        rebuilt += "";
+        console.error("[Chat API] Failed to parse remote image markdown metadata:", error);
+        rebuilt += matchText;
       }
 
       cursor = start + matchText.length;