Reapply font scaling after theme change (#4782)

functions/private/Invoke-WinUtilFontScaling.ps1

@@ -74,6 +74,9 @@ function Invoke-WinUtilFontScaling {
         }
     }
 
+    # Store the scale factor so it can be reapplied after theme changes
+    $sync.FontScaleFactor = $ScaleFactor
+
     # Update the font scaling percentage displayed on the UI
     if ($sync.FontScalingValue) {
         $percentage = [math]::Round($ScaleFactor * 100)

functions/private/Invoke-WinutilThemeChange.ps1

@@ -149,6 +149,11 @@ function Invoke-WinutilThemeChange {
         }
     }
 
+    # Reapply font scaling if it was previously set (theme change resets shared resources)
+    if ($sync.ContainsKey("FontScaleFactor") -and $sync.FontScaleFactor -ne 1.0) {
+        Invoke-WinUtilFontScaling -ScaleFactor $sync.FontScaleFactor
+    }
+
     # Update the theme selector button with the appropriate icon
     $ThemeButton = $sync.Form.FindName("ThemeButton")
     $ThemeButton.Content = [string]$themeButtonIcon