[BUG]: Document storage bypasses quota-safe localStorage writes

[Gautam25Raj]

Affected Apps / Packages

Studio (apps/studio)

Description

Resume storage uses the quota-aware LocalStorageService, but generic document storage writes directly with localStorage.setItem. Browser quota errors can throw and break document creation/save flows.

Steps to Reproduce

1. Fill browser localStorage near quota.
2. Create or edit a cover letter.
3. Observe that localStorage.setItem can throw without a user-friendly failure path.

Expected Behavior

All document saves should use the same quota-safe storage abstraction and return structured save results.

Environment Information

• OS: Windows
• App: @veriworkly/studio
• Storage: browser localStorage

Relevant Logs

Static evidence:

• apps/studio/features/documents/services/document-workspace-service.ts
• apps/studio/features/documents/services/local-storage-service.ts

Proposed Fix / Suggestions

• Move cover-letter document storage onto LocalStorageService.
• Return SaveDocumentResult.
• Surface quota failures in editor/dashboard UI.