Fix: File explorer preview didn't work with per-user installation (#40314)

<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request
This Bug started when the Win11 context menu integration was first
introduced by Image Resizer in version v0.60.0.

Move Image Resizer to the WinUI3Apps folder to fix file preview issue
when PowerToys is installed on a non-C:\Program Files.
This aligns with the current structure used by File Locksmith and
PowerRename, which are not WinUI 3 apps either, but are already located
there.

### Root Cause:
When registering an MSIX package, the Windows API adds certain user
permissions to the installation folders. Since Image Resizer was
previously placed under the main PowerToys directory, these permission
changes could prevent Explorer from loading its preview handler properly
in per-user scenarios.


![image](https://github.com/user-attachments/assets/a8626314-19ce-4e25-87d6-d5e74a015e68)

Interestingly, this issue only affects per-user installs, not
machine-wide installs (e.g., to Program Files), even though both
locations receive additional permissions. The exact reason is still
unclear and requires further investigation.

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## PR Checklist

- [x] **Closes:** #24384 #29644 #32113 #34139 #37866 #40345
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

<!-- Provide a more detailed description of the PR, other things fixed,
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

installer/PowerToysSetup/ImageResizer.wxs

@@ -5,10 +5,10 @@
   <?include $(sys.CURRENTDIR)\Common.wxi?>
 
   <?define ImageResizerAssetsFiles=?>
-  <?define ImageResizerAssetsFilesPath=$(var.BinDir)Assets\ImageResizer\?>
+  <?define ImageResizerAssetsFilesPath=$(var.BinDir)WinUI3Apps\Assets\ImageResizer\?>
 
   <Fragment>
-    <DirectoryRef Id="BaseApplicationsAssetsFolder">
+    <DirectoryRef Id="WinUI3AppsAssetsFolder">
       <Directory Id="ImageResizerAssetsFolder" Name="ImageResizer" />
     </DirectoryRef>
 
@@ -18,7 +18,7 @@
 
       <Component Id="Module_ImageResizer_Registry" Win64="yes">
         <RegistryKey Root="$(var.RegistryScope)" Key="Software\Classes\CLSID\{51B4D7E5-7568-4234-B4BB-47FB3C016A69}\InprocServer32">
-          <RegistryValue Value="[INSTALLFOLDER]PowerToys.ImageResizerExt.dll" Type="string" />
+          <RegistryValue Value="[WinUI3AppsInstallFolder]PowerToys.ImageResizerExt.dll" Type="string" />
           <RegistryValue Name="ThreadingModel" Value="Apartment" Type="string" />
         </RegistryKey>
 

installer/PowerToysSetup/Resources.wxs

@@ -186,7 +186,7 @@
         <RegistryKey Root="$(var.RegistryScope)" Key="Software\Classes\powertoys\components">
           <RegistryValue Type="string" Name="ImageResizer_$(var.IdSafeLanguage)_Component" Value="" KeyPath="yes"/>
         </RegistryKey>
-        <File Id="ImageResizer_$(var.IdSafeLanguage)_File" Source="$(var.BinDir)\$(var.Language)\PowerToys.ImageResizer.resources.dll" />
+        <File Id="ImageResizer_$(var.IdSafeLanguage)_File" Source="$(var.BinDir)\WinUI3Apps\$(var.Language)\PowerToys.ImageResizer.resources.dll" />
       </Component>
       <Component
           Id="ColorPicker_$(var.IdSafeLanguage)_Component"

installer/PowerToysSetup/generateAllFileComponents.ps1

@@ -179,7 +179,7 @@ Generate-FileList -fileDepsJson "" -fileListName HostsAssetsFiles -wxsFilePath $
 Generate-FileComponents -fileListName "HostsAssetsFiles" -wxsFilePath $PSScriptRoot\Hosts.wxs -regroot $registryroot
 
 #ImageResizer
-Generate-FileList -fileDepsJson "" -fileListName ImageResizerAssetsFiles -wxsFilePath $PSScriptRoot\ImageResizer.wxs -depsPath "$PSScriptRoot..\..\..\$platform\Release\Assets\ImageResizer"
+Generate-FileList -fileDepsJson "" -fileListName ImageResizerAssetsFiles -wxsFilePath $PSScriptRoot\ImageResizer.wxs -depsPath "$PSScriptRoot..\..\..\$platform\Release\WinUI3Apps\Assets\ImageResizer"
 Generate-FileComponents -fileListName "ImageResizerAssetsFiles" -wxsFilePath $PSScriptRoot\ImageResizer.wxs -regroot $registryroot
 
 #New+

src/modules/imageresizer/ImageResizerContextMenu/ImageResizerContextMenu.vcxproj

@@ -34,7 +34,7 @@
     <TargetName>PowerToys.ImageResizerContextMenu</TargetName>
     <!-- Needs a different int dir to avoid conflicts in msix creation. -->
     <IntDir>$(SolutionDir)$(Platform)\$(Configuration)\TemporaryBuild\obj\$(ProjectName)\</IntDir>
-    <OutDir>..\..\..\..\$(Platform)\$(Configuration)\</OutDir>
+    <OutDir>..\..\..\..\$(Platform)\$(Configuration)\WinUI3Apps\</OutDir>
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
     <ClCompile>

src/modules/imageresizer/ImageResizerLib/ImageResizerLib.vcxproj

@@ -29,7 +29,7 @@
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
-    <OutDir>..\..\..\..\$(Platform)\$(Configuration)\</OutDir>
+    <OutDir>..\..\..\..\$(Platform)\$(Configuration)\WinUI3Apps\</OutDir>
   </PropertyGroup>
   <PropertyGroup>
     <TargetName>PowerToys.$(ProjectName)</TargetName>

src/modules/imageresizer/dll/ImageResizerExt.vcxproj

@@ -26,7 +26,7 @@
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <IgnoreImportLibrary>true</IgnoreImportLibrary>
-    <OutDir>..\..\..\..\$(Platform)\$(Configuration)\</OutDir>
+    <OutDir>..\..\..\..\$(Platform)\$(Configuration)\WinUI3Apps\</OutDir>
     <TargetName>PowerToys.ImageResizerExt</TargetName>
   </PropertyGroup>
   <ItemDefinitionGroup>

src/modules/imageresizer/ui/ImageResizerUI.csproj

@@ -5,7 +5,7 @@
   
   <PropertyGroup>
     <AssemblyTitle>PowerToys.ImageResizer</AssemblyTitle>
-    <OutputPath>..\..\..\..\$(Platform)\$(Configuration)</OutputPath>
+    <OutputPath>..\..\..\..\$(Platform)\$(Configuration)\WinUI3Apps\</OutputPath>
     <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
     <AppendRuntimeIdentifierToOutputPath>false</AppendRuntimeIdentifierToOutputPath>
     <GenerateSatelliteAssembliesForCore>true</GenerateSatelliteAssembliesForCore>

src/runner/main.cpp

@@ -149,7 +149,7 @@ int runner(bool isProcessElevated, bool openSettings, std::string settingsWindow
         std::vector<std::wstring_view> knownModules = {
             L"PowerToys.FancyZonesModuleInterface.dll",
             L"PowerToys.powerpreview.dll",
-            L"PowerToys.ImageResizerExt.dll",
+            L"WinUI3Apps/PowerToys.ImageResizerExt.dll",
             L"PowerToys.KeyboardManager.dll",
             L"PowerToys.Launcher.dll",
             L"WinUI3Apps/PowerToys.PowerRenameExt.dll",