Add extended context menu setting for Image Resizer

[Copilot]

Summary of the Pull Request

Adds configurable extended context menu support to Image Resizer, matching PowerRename's existing functionality. Users can now choose to show Image Resizer only when Shift + Right-click is used.

PR Checklist

• 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 for new binaries
  • WXS for installer for new binaries and localization folder
  • YML for CI pipeline for new test projects
  • YML for signed pipeline
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Backend (C++)

• Added extendedContextMenuOnly boolean setting (defaults false for backward compatibility)
• QueryContextMenu() checks CMF_EXTENDEDVERBS flag when setting enabled
• JSON persistence at %LOCALAPPDATA%\Microsoft\PowerToys\ImageResizer\image-resizer-settings.json

// Check if we should only be on the extended context menu
if (CSettingsInstance().GetExtendedContextMenuOnly() && (!(uFlags & CMF_EXTENDEDVERBS)))
    return E_FAIL;

Settings UI (C#)

• New "Shell integration" group with ComboBox (default/extended only)
• InfoBar explains Shift + Right-click shortcut
• Property binding with automatic persistence via ViewModel

Files Modified: 8 files (+87, -1 lines)

• Backend: Settings.h, Settings.cpp, ContextMenuHandler.cpp
• Settings UI: ImageResizerProperties.cs, ImageResizerViewModel.cs, ImageResizerPage.xaml, Resources.resw
• Tests: ImageResizer.cs (added persistence test)

Behavior:

Setting	Right-Click	Shift + Right-Click
Default and extended	Shows	Shows
Extended only	Hidden	Shows

Validation Steps Performed

• Unit test verifies property persistence
• Manual testing required: context menu behavior in Explorer with images, settings persistence, UI display

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[Image Resizer] Support only showing in extended context menu</issue_title>
<issue_description>## Feature Request

Can Image Resizer include a setting where it can be configured to only show in extended context menu (i.e. Shift + Right click). It is already supported by Powerrename, and it would be great to also have this setting in Image Resizer.</issue_description>

<agent_instructions>Implement a proper fix for this issue. Do NOT create placeholder stub files. Create actual working code that addresses the issue described. Follow PowerToys coding guidelines and conventions.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@crutkas Great idea!

• Fixes [Image Resizer] Support only showing in extended context menu #3054

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.