feat: remove Supabase, bundle questions locally, use JSON DB + API

fix: batch of 5 stability fixes

fix(spark): Batches 2 + 3 — atomic ELO, real DB IDs, polish

fix(spark): Batch 1 — practice ELO leak, schema alignment, RLS tightening

feat(spark): add landing page queries for preview, leaderboard, recent debates

feat(spark): complete debate arena rework to conversational flow

fix(spark): update downstream components for new RoundData field names

feat(spark): add challenge persistence and update round schema

feat(spark): rewrite state machine for conversational flow

feat(spark): update types for conversational debate flow

fix: leaderboard tracking, score bugs, mobile admin, OG image

feat: improve UX and player tracking

feat: allow users to suggest custom debate topics

fix: resolve all type errors from spectrum redesign

feat(spark): update admin panel and registration for spectrum

feat(spark): DB queries, API routes, and UI components for spectrum redesign

feat(spark): spectrum data model and core types overhaul - remove lefty/righty

feat: add Spark Debate Arena tracking to admin analytics panel

fix: persist ELO ratings and games_played to database

feat: redesign judge to be qualitative instead of numeric categories

feat: add Spark Micro-Debate Arena

feat: cross-device account linking via 6-char sync code

feat: per-session location tracking + admin player intelligence

feat: player signup metadata tracking + shop purchase visual feedback

feat: easter eggs — triple-click admin access + TRIVIAMASTER name unlock

fix: implement player name change DB sync and policies

feat: implement cosmic shop logic, db functions, and policies for purchasing and equipping cosmetics

fix: auto-heal old string guest IDs to valid UUIDs and connect trophy room to real DB table

fix: resolve TS build errors related to outdated game_sessions schema definitions

fix: resolve foreign key uuid issues preventing leaderboard submission & guarantee true randomness when fetching question batches

fix: apply v2 migrations to db and update leaderboard UI/queries to match new schema

fix: prevent challenge-me mode from hanging on infinite spinner at end of game

Fix Quick Match multiplayer sync and solo scoring feedback

Fix Nebula Glide controls, leaderboard spam, and stale room codes

Fix Challenge Me 3-round system + improve Nebula Arcade drawer

feat: add room-based multiplayer, Game Night, and 124 new questions

feat: redesign landing page with floating tiles, hero pillars, scoring transparency

feat: fix question system + add HF Spaces deployment

feat: add cosmetic definitions, theme system, queries, and CosmeticProvider

feat: add achievement definitions, checker engine, coin calculator, and queries

feat: widen query type signatures to GameMode, add score normalization

feat: add platform features schema migration (achievements, cosmetics, star coins)

feat: add Supabase client guard and player sync

feat: add mini-game shared infrastructure (types, registry, high-scores)

feat: add confetti utilities and category icon mapper

feat: polish — page transitions, sound integration, screen shake, remaining files

feat: multiplayer — matchmaking, 1v1 match with bot demo, match results with ELO

feat: results screen, leaderboard page, procedural sound system

fix: spec compliance — restore emojis, fix timer race condition, fix query types

feat: question system with categories, shuffle, progressive difficulty, and seeder