- Replace client-side IndexedDB with server-first document storage
- Add document caching layer for offline capability and performance
- Implement document transfer during anonymous-to-authenticated account linking
- Add database indexes for improved query performance
- Update document contexts to use new caching system
- Refactor document upload and deletion APIs
- Add audiobook pruning for missing files
- Improve test isolation with namespace support
- Add unit tests for document cache and transfer functions
- Introduces `DocumentPreview` component to display rich previews for documents.
- PDFs generate a thumbnail of their first page.
- EPUBs extract and display their cover image.
- HTML, TXT, and Markdown files show a text snippet.
- Refactors document list and folder views to a responsive grid layout.
- Expands main content areas to accommodate the new grid.
- Updates Dockerfile to use Node.js LTS image.
- Updates various development and runtime dependencies.
