feat(ui): implement dialogue pipeline — selection, walk-away, confrontation
Protocol: decode current_dialogue with structured options {text,
response_id, priority, confrontation} and npc_entity_id (#435).
Dialogue box: priority sort, max 3 visible, RichTextLabel for BBCode
italic confrontation options (D-063), 1.5s monologue beat with audio
dip before confrontation send. Walk-away: WASD triggers WalkAway
input, 300ms fade, dialogue_active flag gates movement (D-064).
Implements #435, #437, #436.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.6
bfc699c15d