fix: retry byok gemini calls on 429 with backoff

feat: add character-specific heckles and rubric-based ippon evaluation

feat: add thinking pause, hand-raise flow, and stricter ippon judging

feat: simplify gameplay UI with clear progress and answer cards

feat: shift core loop toward ippin-style multi-at-bat ogiri

feat: switch to audience voting and persist latest ogiri answers

chore: update top hero copy for ogiri-focused messaging

feat: add audience gauge meter to ogiri main screen

ui: show answer text under focused character

ui: keep topic always visible with fixed topic bar

ui: hide inner thoughts and increase readability time

fix: continue to next round when no elimination occurs

chore: tone down death-game wording and keep ogiri-first flow

perf: speed up flow and enforce ogiri-first prompting

feat: phase1 roadmap and mvp vote/character alignment