diff --git a/ui/src/hooks/useTaskOperations.ts b/ui/src/hooks/useTaskOperations.ts
index a7ee15a..04d4bde 100644
--- a/ui/src/hooks/useTaskOperations.ts
+++ b/ui/src/hooks/useTaskOperations.ts
@@ -28,14 +28,14 @@ export function useTaskOperations({ taskId, showToast, setUrlState, setShowCreat
 
   const handleComment = useCallback(async (body: string, attachments?: Array<{ name: string; contentBase64: string }>) => {
     if (!taskId) return;
-    try {
-      await postLocalTaskComment(taskId, body, 'user', attachments);
-      qc.invalidateQueries({ queryKey: ['localTaskDetail', taskId] });
-      qc.invalidateQueries({ queryKey: ['localTasks'] });
-    } catch {
-      showToast(t('toast.commentFailed'), 'error');
-    }
-  }, [taskId, qc, showToast, t]);
+    // Let send failures propagate to ChatPane, which preserves the draft +
+    // attachments and shows an inline error with a retry button. Swallowing the
+    // error here would make ChatPane treat the send as successful and clear the
+    // user's input (losing the prompt and attachments on failure).
+    await postLocalTaskComment(taskId, body, 'user', attachments);
+    qc.invalidateQueries({ queryKey: ['localTaskDetail', taskId] });
+    qc.invalidateQueries({ queryKey: ['localTasks'] });
+  }, [taskId, qc]);
 
   const handleDelete = useCallback(async () => {
     if (!taskId) return;