feat: state sync, Dante's circles, smoke themes, admin mode, generative artwork

.claude/agent-memory/researcher/MEMORY.md

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+- [State-sharing feature context](project_state_sharing.md) — goal, key state fields, existing AWS infra, no user-auth today

.claude/agent-memory/researcher/project_state_sharing.md

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+---
+name: state-sharing feature context
+description: Goal and codebase context for the state-sharing feature branch — syncing favorites/heard state across devices via username/password encrypted cloud backend
+type: project
+---
+
+State-sharing feature goal: sync user state (favorites, heard tracks) across devices using a username/password that encrypts data stored in a cloud backend. Work is on the `state-sharing` branch.
+
+**Why:** Currently all state is device-local (localStorage + IndexedDB). Users lose state when switching devices or browsers.
+
+**How to apply:** Any new backend must integrate with the existing `storage.js` load/save pattern. The sync model should be additive — localStorage remains the source of truth locally, cloud is the sync layer.
+
+Key state to sync:
+- `state.favoriteTracks` (Set of track IDs) — stored in localStorage under `${prefix}_favorite_tracks`
+- `state.heardTracks` (Set of track IDs) — stored in localStorage under `${prefix}_heard_tracks`
+- `state.secretUnlocked` (boolean) — stored under `${prefix}_secret_unlocked`
+
+Existing AWS infra: S3 + CloudFront + Route53 + Secrets Manager, managed by Terraform in `/terraform/`. No existing Lambda, API Gateway, Cognito, or DynamoDB. Auth today is CloudFront signed cookies (not user-level auth).