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The server broadcasts a "typing" event to the whole room right when it starts the DM turn, and broadcasts turn failures to everyone too (previously only the sender saw them, which would've left other players' indicators stuck forever). The frontend shows a pulsing "Dungeon Master schreibt …" line that clears once the real reply or an error arrives. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>