Seamless dialog transitions, click sounds, and PlaceholderAPI in drawn dialogs

Dialogs

• Dialogs now use after: seamless by default. The current dialog stays visible until the next replaces it, without flashing the world or showing a waiting screen. If nothing follows, it closes on the next tick.
• Existing settings using the old default-after: wait default switch to seamless once, preserving comments. Set it back to wait to keep the waiting screen.
• Command buttons close the current dialog before running, so screens opened by commands are not closed afterward.
• Seamless dialogs accept only the first click. Notices without buttons now get an Ok button that closes them.

Click sounds

• Clickable pictures now play a button-click sound when the click reaches the server. Set a different sound, volume, or pitch for a drawn dialog or an individual clickable piece, or silence it. Client-only actions such as links and copying remain silent.

PlaceholderAPI

• A drawn dialog's live words now reach PlaceholderAPI: a {vault_eco_balance} nothing else answers is asked for as %vault_eco_balance%.

Fixed

• Live player heads in drawn dialogs are drawn on Paper 26.x again.
• Fixed after: wait leaving players on “Waiting for Server” for five seconds when no dialog followed.
• Drawn dialogs using Wait now close after the configured delay unless another dialog opens. Rejected or failed clicks also close instead of leaving players waiting.
• Dialogs with URL, copy, or suggest buttons now use after: close, preventing client-only actions from leaving players on the waiting screen.