Color Match Drop

Problem: Apple couldn't find the ATT dialog during review. expo-tracking-transparency was implemented correctly.

Solution: Identified that the reviewer's iPad had "Allow Apps to Request to Track" disabled globally. Formal response to Apple explaining the scenario.

→ Resolved without code changes or additional builds. Protocol documented for future apps.

Problem: Full chain: BFS → categorize (4 vs 5+) → evolve → abilities (which trigger new eliminations) → gravity → re-detect.

Solution: Chain rounds loop with separate pure functions. 300ms animated pauses between rounds for visibility.

→ 6+ round chains with ×8 multiplier. Each component individually testable.

Problem: Simulate complete hard drop including the entire resulting chain without modifying actual game state.

Solution: prophecyEngine.ts clones board, runs simulation with same matchEngine functions, returns results without side effects.

→ Elegant assist mode that improves accessibility without breaking competitive gameplay.

Problem: Biomes couldn't be just cosmetic — they needed to modify mechanics without breaking balance or introducing bugs.

Solution: biomeEngine.ts with parameterized modifiers applied at specific game loop points, decoupled from the match engine.

→ Each biome requires real strategic adaptation. Multiplied replayability.

Problem: Coins desynchronized between frontend and DB when creating/accepting duels with bets.

Solution: DB as source of truth. Dual update: DB authoritative + duelStore updates userStore locally post-operation.

→ Coins always reflect real state without re-fetch.