CmdPal: Icon doesn't recognize grapheme clusters

### Microsoft PowerToys version

0.93.0

### Installation method

PowerToys auto-update

### Area(s) with issue?

Command Palette

### Steps to reproduce

`winrt::Microsoft::Terminal::UI::implementation::IconPathConverter` and `Microsoft.CmdPal.UI.Controls.IconBox` treat anything longer than 2 UTF-16 code units as “not an emoji,” so multi-codepoint emoji/grapheme clusters get ignored. The check looks like this:

https://github.com/microsoft/PowerToys/blob/377d134d40dde4c05bf2c47dfe8621a4cdd42b6c/src/modules/cmdpal/Microsoft.Terminal.UI/IconPathConverter.cpp#L170-L180

https://github.com/microsoft/PowerToys/blob/377d134d40dde4c05bf2c47dfe8621a4cdd42b6c/src/modules/cmdpal/Microsoft.CmdPal.UI/Controls/IconBox.cs#L145-L150

Why this breaks:

Lots of emoji are grapheme clusters (multiple code points), e.g. family emojis, skin tones, gendered professions (🧙‍♂️ “man mage”), flags, etc.

E.g. 🧙‍♂️ has 4 codepoints: U+1F9D9 U+200D U+2642 U+FE0F

Those are a single user-perceived character but >2 wchar_ts, so they fail the length check.

https://github.com/microsoft/terminal/blob/main/src/types/CodepointWidthDetector.cpp

<img width="677" height="264" alt="Image" src="https://github.com/user-attachments/assets/2e523a4c-13fe-4c8e-b543-47cb6bdb78c8" />

	// If we fail to set the icon source using the "icon" as a path,
	// let's try it as a symbol/emoji.
	//
	// Anything longer than 2 wchar_t's _isn't_ an emoji or symbol, so
	// don't do this if it's just an invalid path.
	if (!iconSource && iconPath.size() <= 2)
	{
	try
	{
	typename FontIconSource<TIconSource>::type icon;
	const auto ch = til::at(iconPath, 0);

	if (iconData is not null &&
	@this.Source is FontIconSource)
	{
	if (!string.IsNullOrEmpty(iconData.Icon) && iconData.Icon.Length <= 2)
	{
	var ch = iconData.Icon[0];

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CmdPal: Icon doesn't recognize grapheme clusters #41489

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CmdPal: Icon doesn't recognize grapheme clusters #41489

Description

Microsoft PowerToys version

Installation method

Area(s) with issue?

Steps to reproduce

Metadata

Metadata

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Type

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Development

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