[0.83] fix text input scaling (#16291)

* Fixes misalignment with TextInput on different display scales

* Change files

Author: SBS-dlucas

change/react-native-windows-5e8af782-1cd1-4b6a-84fd-7d13baffe3cd.json

@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Fixes misalignment with TextInput on different display scales",
+  "packageName": "react-native-windows",
+  "email": "dlucas@seabird.com",
+  "dependentChangeType": "patch"
+}

vnext/Microsoft.ReactNative/Fabric/Composition/TextInput/WindowsTextInputComponentView.cpp

@@ -1276,7 +1276,7 @@ void WindowsTextInputComponentView::updateLayoutMetrics(
     facebook::react::LayoutMetrics const &oldLayoutMetrics) noexcept {
   // Set Position & Size Properties
 
-  if ((layoutMetrics.pointScaleFactor != m_layoutMetrics.pointScaleFactor)) {
+  if (m_textServices && layoutMetrics.pointScaleFactor > 0) {
     LRESULT res;
     winrt::check_hresult(m_textServices->TxSendMessage(
         (WM_USER + 328), // EM_SETDPI