This update refines the first-time tutorial overlay on the Evidence Board.

[Tutorial Improvements]

· The first-time tutorial overlay now stays open until manually dismissed, ensuring you have time to read through it

· Added a new entry: "Double-click any card to view its full description"

· Returning players: The tutorial will be shown once more after this update for a quick refresher

[New Help Button]

· A new ❓ button has been added to the Evidence Board top bar — you can revisit the operation guide anytime

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Thanks to the community for the feedback and suggestions.