# W-041 Status

status: done_current_scope
task: 建立 IndexedDB schema 和 migration

`web/app/src/storage/migrations.ts` upgrades `blender-web-metadata` to schema
version 4 while preserving the existing smoke store. It creates `project`,
`asset`, `snapshot`, `operation_log`, `setting` and `migration` stores and
records each schema migration. Schema 4 adds content-addressed asset metadata;
StorageWorker `info`, project layout and Worker-restart discovery are covered by Playwright.

Downgrade/rollback across older deployed browser builds remains outside the current scope.