Refactor cloud sync state ownership

[ryokun6]

Summary

• extract the remaining cloud sync domains into src/utils/sync/engine/domains, including files metadata, individual blob domains, songs, videos, stickies, and calendar
• keep cloudSync.ts as orchestration by delegating snapshot serialize/apply/merge behavior through the new engine modules
• keep the single persisted sync metadata owner introduced earlier and preserve the existing logical/physical sync payload contracts

Testing

• bun test tests/test-cloud-sync-utils.test.ts tests/test-cloud-sync-launch-and-store.test.ts
• bun test tests/test-cloud-sync-domains.test.ts tests/test-sync-logical-domains.test.ts
• bun run build
• manual two-tab cloud sync verification on http://localhost:3001 using ryo / testtest: changed theme in tab 1 and confirmed it in tab 2 after refresh; created a new TextEdit document in tab 1 and confirmed it appeared in tab 2's Documents folder

  

[ryos-deploy]

The preview deployment for ryos-dev is ready. 🟢

Open Preview | Open Build Logs | Open Application Logs

Last updated at: 2026-03-16 15:14:19 CET