hypercross 96d732d6ab refactor: simplify component iteration and singleton handling ... Update the ECS engine to support automatic mutation tracking for singletons during iteration, removing the need for manual `MarkModified` calls. - Update `ComponentDiscoveryGenerator` to detect singleton components. - Refactor `PlaceMarkCommand` and `WinCheckSystem` to leverage automatic mutation marking. - Replace `ForEach` usage with `Select` and `ItemN` access in tests and systems to align with the updated iterator API.		2026-07-21 09:15:27 +08:00
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PlaceMarkCommand.cs	refactor: simplify component iteration and singleton handling	2026-07-21 09:15:27 +08:00