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## Summary Adds an LRU (Least Recently Used) cache layer and storage I/O utilities that handle localStorage quota limits gracefully. When storage is full, the oldest drafts are automatically evicted to make room for new ones. ## Changes - **What**: - `draftCacheV2.ts` - In-memory LRU cache with configurable max entries (default 32) - `storageIO.ts` - Storage read/write with automatic quota management and eviction - **Why**: Users experience `QuotaExceededError` when localStorage fills up with workflow drafts, breaking auto-save functionality ## Review Focus - LRU eviction logic in `draftCacheV2.ts` - Quota error handling and recovery in `storageIO.ts` --- *Part 2 of 4 in the workflow persistence improvements stack* --------- Co-authored-by: Amp <amp@ampcode.com>