From 4ed9b30ce9d429bdaf59fc23be3b17e57a323434 Mon Sep 17 00:00:00 2001
From: Jannis Braun <151788261+TheZwiss@users.noreply.github.com>
Date: Thu, 26 Mar 2026 06:37:26 +0100
Subject: [PATCH] fix(federation): don't copy source thumbnail filename to
 relay attachments

The source instance's thumbnail file doesn't exist locally, so copying
its thumbnailFilename causes a 404 in the chat view. Set to null so
AttachmentRenderer falls back to the full image URL.
---
 packages/server/src/routes/federation.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/server/src/routes/federation.ts b/packages/server/src/routes/federation.ts
index 75448cee..36e44495 100644
--- a/packages/server/src/routes/federation.ts
+++ b/packages/server/src/routes/federation.ts
@@ -1053,7 +1053,7 @@ function processCreateEvent(
           width: attachment.width ?? null,
           height: attachment.height ?? null,
           duration: attachment.duration ?? null,
-          thumbnailFilename: attachment.thumbnailFilename ?? null,
+          thumbnailFilename: null,  // Don't copy source thumbnail — it doesn't exist locally
           sourceUrl: attachment.sourceUrl,
           createdAt: now,
         })