diff --git a/src/OpenClaw.Tray.WinUI/Chat/ChatComposerController.cs b/src/OpenClaw.Tray.WinUI/Chat/ChatComposerController.cs
index af3542f8e..c018b6610 100644
--- a/src/OpenClaw.Tray.WinUI/Chat/ChatComposerController.cs
+++ b/src/OpenClaw.Tray.WinUI/Chat/ChatComposerController.cs
@@ -164,7 +164,7 @@ public async Task<bool> SendAsync()
         var thread = inputs.CurrentThread;
         var draft = _vm.Draft;
         var attachments = _vm.PendingAttachments;
-        var message = draft.Trim();
+        var message = draft.Trim().Replace("\r\n", "\n").Replace('\r', '\n');
         if ((message.Length == 0 && attachments.Count == 0)
             || _vm.SlashDisplay.IsLoading
             || inputs.ConnectionState != "connected")
diff --git a/tests/OpenClaw.Tray.Tests/ChatComposerControllerTests.cs b/tests/OpenClaw.Tray.Tests/ChatComposerControllerTests.cs
index a9e9ddcca..ab0511bca 100644
--- a/tests/OpenClaw.Tray.Tests/ChatComposerControllerTests.cs
+++ b/tests/OpenClaw.Tray.Tests/ChatComposerControllerTests.cs
@@ -98,6 +98,17 @@ public async Task SendAsync_OrdinaryMessage_CallsProviderExactlyOnceAndClearsDra
         Assert.Equal(string.Empty, vm.Draft);
     }
 
+    [Fact]
+    public async Task SendAsync_TextBoxLineBreaks_AreSentAsLineFeeds()
+    {
+        var (vm, controller, port, _) = MakeController();
+        vm.SetDraft("line one\rline two\r\nline three");
+
+        Assert.True(await controller.SendAsync());
+
+        Assert.Equal("line one\nline two\nline three", port.LastSendMessageCall!.Value.Message);
+    }
+
     [Fact]
     public async Task SendAsync_ActiveTurn_AcceptedFollowUpClearsComposerAndAllowsAnotherDraft()
     {