installer: auto-terminate QuickLook.exe before install/upgrade/uninstall (#1918)

* Initial plan

* fix: auto-close QuickLook.exe before MSI install/upgrade/uninstall to prevent locked-file warnings

Agent-Logs-Url: https://github.com/QL-Win/QuickLook/sessions/107141f9-3b6f-4409-8cd2-2d3663c692c9

Co-authored-by: emako <24737061+emako@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: emako <24737061+emako@users.noreply.github.com>

QuickLook.Installer/Product.wxs

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
+<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi"
+     xmlns:util="http://schemas.microsoft.com/wix/UtilExtension">
   <Product Id="*" Name="QuickLook" Language="1033"
            Version="!(bind.FileVersion.fil22F7B7F07E63622AD2451459086A3CF2)" Manufacturer="QL-Win"
            UpgradeCode="c83b9c02-87d6-494e-9f5f-cf4c3900a54d">
@@ -60,6 +61,14 @@
       </Directory>
     </Directory>
 
+    <!-- Close QuickLook before install/upgrade/uninstall to prevent locked-file warnings -->
+    <util:CloseApplication Id="CloseQuickLookExe"
+                           Target="QuickLook.exe"
+                           CloseMessage="yes"
+                           RebootPrompt="no"
+                           TerminateProcess="1"
+                           Sequence="800" />
+
     <CustomAction Id="LaunchApplication"
                   FileKey="fil22F7B7F07E63622AD2451459086A3CF2"
                   ExeCommand="/first"

QuickLook.Installer/QuickLook.Installer.wixproj

@@ -28,6 +28,10 @@
       <HintPath>$(WixExtDir)\WixUIExtension.dll</HintPath>
       <Name>WixUIExtension</Name>
     </WixExtension>
+    <WixExtension Include="WixUtilExtension">
+      <HintPath>$(WixExtDir)\WixUtilExtension.dll</HintPath>
+      <Name>WixUtilExtension</Name>
+    </WixExtension>
   </ItemGroup>
   <ItemGroup>
     <Content Include="gpl.rtf" />