fix: incorrect media appearance after reaction

server/internal/api/reactions.go

@@ -83,6 +83,12 @@ func (h *apiHandler) writeMessageWithReactions(w http.ResponseWriter, r *http.Re
 		return
 	}
 	msgs := []messageJSON{toMessageJSON(msg)}
+	if msg.MediaID != nil {
+		if m, err := h.store.GetMediaByID(r.Context(), *msg.MediaID); err == nil {
+			md := toMediaJSON(m)
+			msgs[0].Media = &md
+		}
+	}
 	reactions, err := h.store.ReactionsForMessages(r.Context(), []int64{msgID})
 	if err != nil {
 		writeError(w, http.StatusInternalServerError, "internal server error")

web/src/screens/ChatApp.tsx

@@ -263,12 +263,17 @@ export default function ChatApp({ user }: ChatAppProps) {
         const updated = mine
           ? await api.removeReaction(message.conversation_id, message.id, emoji)
           : await api.addReaction(message.conversation_id, message.id, emoji)
-        upsert(updated)
+        patchMessage(message.id, (current) => ({
+          ...current,
+          ...updated,
+          media: updated.media ?? current.media,
+          reactions: updated.reactions,
+        }))
       } catch {
         return
       }
     },
-    [upsert, user.id],
+    [patchMessage, user.id],
   )
 
   const sendTyping = useCallback(