Can I vibecode Mermaid Chart?

Build a usable personal replacement for the core loop of Mermaid Chart.
Use exactly this stack: React + TypeScript + Vite + IndexedDB for local storage.

Primary job: Build a browser-based diagram-as-code editor with a live preview, drag-and-resize pane capabilities, keyboard shortcuts, autosave, and export functionalities (SVG and PNG).
Start from an empty folder and create the complete working project.
Make the default mode single-user and private. The user's diagrams should be stored entirely locally in IndexedDB; no data should be sent to any external server. 

Feature Requirements:
1. Two-Pane Layout: A resizable split-pane view. On the left, a robust code editor (e.g., Monaco Editor or CodeMirror) with Mermaid.js syntax highlighting and basic autocomplete. On the right, a live-rendered Mermaid diagram.
2. Real-time Rendering: The diagram should update as the user types, but debounce the render calls to avoid performance hits on large diagrams. If the syntax is invalid, display a clear, readable error overlay on top of the rendering pane instead of crashing the app.
3. File Management: Implement a sidebar to manage multiple diagrams. Users should be able to create, rename, duplicate, and delete diagrams. Autosave changes to IndexedDB immediately.
4. Export Options: Provide clear buttons to download the rendered diagram as an SVG or PNG. 
5. Zoom and Pan: The diagram rendering area must support zooming (via scroll wheel or buttons) and panning (click and drag) for navigating large flowcharts.
6. UI/UX: Use accessible keyboard navigation, labels, focus states, and sensible contrast. Implement a modern, clean design system with clear empty, loading, success, and failure states.

Constraints & Scope:
- Do not add analytics, telemetry, ads, or third-party accounts.
- Put every external credential (if any are needed later) in `.env` and provide `.env.example`.
- Deliberately exclude these paid-product advantages: high-fidelity import/export beyond standard Mermaid formats, presentation mode, enterprise access controls, and multiplayer cursors/comments.

Deliverables:
- Fully functional Vite app.
- Write focused unit tests for the IndexedDB data model and the code debouncing logic.
- Add one end-to-end smoke test that proves the core loop works (creating a file, editing it, and seeing it render).
- Create a README with setup instructions, architecture overview, and instructions on how to backup the local IndexedDB data.
- Run the tests and build before finishing, fixing any errors.