v3.5.0

• [New] Import existing stories (from Markdown or RTF) from the new-project flow
• [New] New export format: RTF
• [New] Draft compare: Paragraph move highlighting
• [Fix] Editor undo/redo getting broken by formatting
• [Fix] Timeline reordering events snapping back into place
• [Fix] Breaking change: Sync API URLs now only use project IDs
• Security hardening: sync auth tokens encrypted at rest, file write sandboxing, max image size enforced