[manuelmayer-dev]

Related to #1197

Summary

An icon can now carry appearances the user names, such as Outlined or Red, next to light, dark, static and animated. They are never picked automatically, and can be chosen in the icon dialog, the editor and the Set Icon Appearance action.

Testing

Full solution build and test suites pass, except the Plugin CLI build test that fails locally on main too. Verified manually in the desktop UI against a running host. Store-side download of single variations is not part of this change.

Plugin SDK / API compatibility

Only a doc comment in the SDK changed. The Set Icon Appearance parameter becomes a dynamic choice with its old options kept as fallback, noted in the compatibility table.

• No public, non-obsolete SDK or plugin protocol contract was removed or changed
• Contracts were only extended additively (new members with defaults, new optional fields, new message types)
• Anything being retired carries [Obsolete] and [MacroDeckDeprecated], is in the deprecation registry, and still works
• A plugin compiled against the previous SDK still loads and behaves identically (source and binary compatible)
• The conformance suite passes and the sample plugin builds and runs unchanged
• Any intentional break was explicitly agreed beforehand and is described below

Checklist

• Tests were added or updated where needed
• The change was verified manually where appropriate
• Documentation was updated if the change affects documented behaviour
• I reviewed and understand every submitted change